Software Engineering Radio is a podcast targeted at the professional software developer. The goal is to be a lasting educational resource, not a newscast. Every 10 days, a new episode is published that covers all topics software engineering. Episodes are either tutorials on a specific topic, or an interview with a well-known character from the software engineering world. All SE Radio episodes are original content — we do not record conferences or talks given in other venues. Each episode compris...more
Tim Coulter, the founder of Truffle (Ethereum DApp development framework) discusses the Truffle framework for Ethereum SmartContracts and Decentralized App development. Kishore Bhatia spoke with Tim Coulter about Ethereum Decentralized Apps (DApps) and Truffle as a DApp development, deployment and testing framework. The interview also covers Tim’s journey creating the Truffle framework with a deep-dive […]
WeWork’s VPE, Randy Shoup, discusses how to scale technology and organization together. Host Travis Kimmel spoke with Randy (formerly VPE at Stitch Fix and CTO at KIXEYE) about the culture, process, and technology changes necessary to scale an organization without experiencing attrition. They discuss how rapidly growing companies can leverage best practices from DevOps, how […]
Avi Kivity of Scylladb deep dives into the internals of Scylladb and what makes it a high performant version of Cassandra, a distributed key-value datastore. Host Nishant Suneja spoke with Avi about how Scylla’s shared nothing architecture helps it in “scaling up” on every single node in the cluster. The discussion further goes into Scylla’s […]
Max Neunhoffer of ArangoDB discusses about multi-model databases in general, and open source ArangoDB, in specific, with show host Nishant Suneja. The discussion starts with comparing multi-model databases with polyglot persistence style modeling, and what are the advantages of one over the other. The discussion further delves into exploring the internals of ArangoDB, a multi […]
Johnathan Nightingale talks with SE Radio host Travis Kimmel about scaling engineering management. Their conversation covers: how and when to hire engineering managers; how to onboard, train and plan for their growth; compensations reviews and promotions; advice for new managers, and what to expect at different management levels. Related links Johnathan and Melissa Nightingale’s and […]
Bernd Rücker, who has contributed to multiple open source workflow management projects, discusses orchestrating microservices with workflow management. As distributed systems evolve into a family of microservices that must handle long-running stateful processes with time-dependent actions, events, multiple paths through the system, and complex rollbacks, the workflow management model provides a way to ensure clear […]
Vivek Ravisankar, the CEO and founder of HackerRank discusses automated coding skills assessments and the HackerRank platform. SE Radio host Kishore Bhatia spoke with him about: HackerRank as a platform for learning, practicing and assessing coding skills; how this platform is helping in skills assessments and coding interviews – both for developers and employers. The […]
Gary Rennie, a core contributor to Phoenix and Plug, discusses the Phoenix, a web framework for the Elixir programming language. Host Nate Black talks with Gary about why companies use Phoenix and what they use it for, how to write a Phoenix application, how the subsystems of Phoenix work together, and how to troubleshoot performance […]
Riccardo Terrell, author of Concurrency in .NET: Modern Patterns of Concurrent and Parallel Programming, discusses concurrency, an important topic in the era of multicores in any machine. SE Radio host Felienne spoke with Terrell about concurrency, parallelism, and immutability. They discussed the impact of programming languages and paradigms on concurrent programming and explored common issues […]
Daniel Corbett of HAProxy discusses how load balancers such as HAProxy are used to improve application scalability, reliability, and security. Host Jeremy Jung spoke with Corbett to explain the concept of load and how a load balancer can distribute it across application servers; the open systems interconnection (OSI) model and how it relates to load […]
Stephen Ewen, one of the original creator of Apache Flink discusses streaming architecture. Streaming architecture has become more important because it enables real-time computation on big data. Edaena Salinas spoke with Stephen Ewen about the comparison between batch processing and stream processing. Stephen explained the architecture components and the types of applications that can be […]
Tyler McMullen of Fastly discusses using Content Delivery Networks to improve application speed, reliability, and security. Host Jeremy Jung speaks with McMullen about what CDNs are and how developers can take advantage of them. They discuss how a CDN consists of thousands of edge servers in datacenters around the world; how these servers cache and […]
Pat Helland talks about building systems at web scale that are prepared to handle failure. Pat has been working on databases, transactions and distributed systems since 1978. Host Edaena Salinas spoke with Helland about the components of a system including physical hardware and data centers; the role of humans in a production system; automation by […]
John Crain, founder of Pixura, discusses some applications of the blockchain technology: Ethereum, smart contracts, solidity, and their application to rare collectible assets. Kishore Bhatia spoke with Crain about: a perspective on how blockchain, distributed computing and cryptographic proof of work have evolved towards a decentralized computing and execution model with Ethereum, drivers for this […]
István Lam of Tresorit talks with host Kim Carter about GDPR (the EU General Data Protection Regulation, which has been described as “the most important change in data privacy regulation in 20 years”). The discussion covers terminology, planning, implementation, users’ access and their rights regarding their personal data, managing personally identifiable information (PII) across organizations, […]
Michael Hausenblas talks with host Kim Carter about topics covered in Michael’s ebook Container Networking, such as single vs. multi-host container networking, orchestration, Kubernetes, service discovery, and many more. Michael and Kim also discuss the roles that IPTables plays, how the allocation of IP addresses is handled, along with the assignment of ports. Overlay networks […]
Travis Kimmel talks with Lara Hogan and Deepa Subramaniam about evidence-based tactics that leaders can use to increase clarity and build healthier, high-performing organizations. Their conversation covers: diagnosing and treating problems that are slowing product, design, and engineering teams; “organization smells”; clarifying roles and responsibilities; improving documentation; facilitating better meetings; improving inter and intra-team dynamics. […]
Jafar Soltani of Rare (Microsoft Studios) discusses Continuous Delivery in mobile games and how it can increase quality, reduce crunch, and deliver games faster. Host Nate Black speaks with guest Jafar Soltani about the unique challenges of AAA games and why these challenges have prevented game companies from implementing continuous delivery. Topics include: the architectural […]
Brent Laster, author of Jenkins 2: Up and Running talks about build pipelines, on Jenkins 2 a build server that can be used to implement continuous integration and deployment and is more devops-friendly that Jenkins 1. Host Robert Blumen talks to Brent about continuous integration and continuous delivery (CI/CD), the role of the build server […]
Ben Sigelman CEO of LightStep and co-author of the OpenTracing standard discusses distributed tracing, a form of event-driven observability useful in debugging distributed systems, understanding latency outlyers, and delivering “white box” analytics. Host Robert Blumen spoke with Sigelman about the basics of tracing, why it is harder in a distributed system, the concept of tracing […]
Saša Jurić, author of Elixir in Action, talks about the Elixir programming language, language gaining in popularity. Topics include: Host Nate Black talks with Juric about: Elixir’s relationship to the Erlang virtual machine (BEAM); the advantages of the Erlang ecosystem; the “sweet spot” for Elixir programs; why a new language was needed for the Erlang […]
Edaena Salinas talks with Maria Gorlatova about Edge Computing. Topics include: the internet of things, edge computing, edge computing experiments and applications, the architecture of edge computing. Maria explained the process of data collection and the type of data that is collected in IoT systems. The discussion continued with a walkthrough example for running a […]
Jeremy Jung talks with David Calavera about zero-downtime migrations and rollbacks with Kubernetes. In this episode we define migrations, rollbacks, and discuss how Netlify was able to migrate to Kubernetes and roll back off of it multiple times without impacting their users. David explains how developers can run old and new systems simultaneously, the importance […]
Felienne interviews Marian Petre & André van der Hoek on their book Software Design Decoded: 66 Ways Experts Think. We talk about the software design process, which Petre & van der Hoek en discuss about in their book too. While there are a lot of books about software design, their books address designers rather than […]
Jeremy Jung talks with John Doran about fixing a broken development process. In this episode we discuss how a project that started as a desktop application transitioned to becoming a SAAS business that serves thousands of businesses. John tells the story of a business that found commercial success but struggled with outages, a lack of […]
Travis Kimmel talks with Kevin Goldsmith about the correspondence between organizational design and software architecture. Their conversation covers: what Conway’s Law is; Kevin’s experiences in different organizational structures (e.g., Avvo, Spotify, Adobe, and Microsoft) and how those structures influenced the software architecture; what the “Reverse Conway Maneuver” is and how organizations can leverage it; how […]
Natalie Silvanovich from Google Project Zero talks with Kim Carter about what attack surface is in regards to software, how to identify risks and reduce the attack surface of the software you as a Software Engineer are creating. Natalie found over 100 0 day security defects in flash in her first year at Google, and […]
Andreas Stefik talks with SE Radio’s Felienne about how blind and visually impaired people use the computer, most commonly with a screen reader. They discuss how screen readers work and what programmers can do to make software more accessible for this group of users. The episode starts with the basics, like adding alt tags, giving […]
Bruce Momjian, a longtime Postgres developer, educator and consultant joins Robert Blumen for a discussion of the SQL query planner in the Postgres relational database. Topics covered include what is a query? How queries are evaluated by the server; the phases of query evaluation; SQL as a declarative language; why declarative query evaluation is simpler […]
Nate Black interviews Glynn Bird on how to maximize productivity and learning by consuming and producing open source software. Topics discussed include: the impact of open source software on the development process, why open source contributions are important for your career development and getting a job, how GitHub is the new resume or CV, how […]
Dmitry Jemerov and Svetlana Isakova speak to Matthew Farwell about the Kotlin programming language. They cover what the goals of Kotlin are, why Kotlin was created, what the target use cases are for Kotlin, syntax differences between Java & Kotlin, differences in classes and interfaces between Java & Kotlin, pattern matching in Kotlin, Kotlin’s type […]
Edaena Salinas talks with Tammy Butow about Chaos Engineering. Topics include: the factors that caused Chaos Engineering to emerge, the different types of chaos that can be introduced to a system, how to structure experiments. Some of the chaos engineering experiments that were discussed are: DNS related attacks, black hole attacks and database attacks. Tammy […]
Diomidis Spinellis talks with Marc Hoffmann on code test coverage and the tools that can analyze it. Knowing the percentage of code that is covered by tests, can help developers assess the quality of their test cases and help them add missing tests and thereby find and remove software faults. Marc is a key developer […]
Lin Clark speaks to Matthew Farwell about WebAssembly. The show covers: what WebAssembly is; what are the goals and use cases for WebAssembly; why you want to use it; how to interact with the browser, how it changes your development process; security, the future of web assembly. Related Links WebAssembly WebAssembly Demo Reading more […]
Bill Venners speaks to Matthew Farwell about Property Based Tests. The show covers: what a property based test is, how it differs from example based testing; why you would want to use them; use cases for property based tests; when you shouldn’t use property based tests; how property based testing impacts a team’s development process; […]
Head of Cryptography Engineering at Tresorit, Péter Budai talks with Kim Carter about End to End Encryption (E2EE), backdoors, the scenarios where E2EE can be and should be used. IM, Voice over IP, Email scenarios, as well as interservice communication scenarios such as securing data in use with full memory encryption, CPU-based key storage, enclaves, […]
Kishore Bhatia discusses with Nate Taggart about Serverless. Topics include: understanding the motivations for this computing model, deep dive learning about Serverless architecture, development frameworks and tools. Learn from Nate’s experience with Serverless paradigm developing Operations tools at Stackery and find out various approaches, challenges and best practices for architecting and building Serverless applications. Related […]
Edaena Salinas talks with Nicole Hubbard about migrating a VM infrastructure to Kubernetes. The discussion begins with an overview of the VM infrastructure at WP Engine. Next, they discussed the characteristics that indicated it was time to consider migrating to a container based infrastructure using Kubernetes. Containers are different than VMs. There are pros and […]
Felienne interviews Veronika Cheplygina about image recognition. The discussion covers: what exactly constitutes image recognition, including categorizing and segmentation problems; fields where image recognition are currently being applied, including medicine, self-driving cars and security, and future applications. The host and guest also cover how to obtain enough and good datasets, and some of the common […]
Kishore Bhatia talks with Travis Kimmel on software engineering measuring, communicating and improving engineering productivity, and challenging the widespread belief that engineering is an art. Their conversation covers: measuring engineering impact; key performance indicators (KPIs); development metrics; challenges in building a delivery pipeline with metrics; implementing feedback loops; the key metrics that most engineering teams […]
Nate Black talks with Nicolai Parlog about Java 9. Topics include: a timeline of Java features; new patterns enabled by Java 8 lambdas, default interface implementations and how they enable code evolution; how Java 9 takes this further with private default methods; an introduction to Java modules: the Java Platform Module System (JPMS); “launch time” […]
Felienne interviews Jeroen Janssens on Data Science. They examine what data science is exactly, particularly exploring how it differs from machine learning and statistics. The episode further considers what skills people need to be great data scientists – skills that are related but not always equal to the skills that programming and software engineering require. […]
Founder of Summit Route / creator of FLAWS, Scott Piper talks with Kim Carter about Cloud Security. Covering the often misunderstood Shared Responsibility Model. Kim and Scott discuss how our assets have changed, and what the risks and countermeasures are with the exodus to the Cloud. A selection of techniques are discussed on how we […]
Kishore Bhatia talks with Conor Delanbanque about DevOps Hiring, building and retaining top talent in the DevOps space. Topics include DevOps as a special Engineering skill, building DevOps mindset and culture, challenges in hiring and retaining top talent and building teams and best practices for DevOps engineers and employers hiring for these skills. Related Links […]
Edaena Salinas talks with Sachin Gadre about the internet of things (IoT). What is IoT? What is the architecture of an IoT application? Sachin walks through a series of example to show how IoT applications are used and how they are built. Topics include: internet of things, data sources, and security. Related Links The […]
Armon Dadgar speaks to Matthew Farwell about Secrets Management. The show covers: what a secret is; the difference between secrets and sensitive data; what is secrets management; the different types of secrets; key management; auditing of secrets; implementing secrets management. Related Links Vault Project Kerwhiz Armon Dadgar HashiCorp SE-Radio Episode 290: Diogo Mónica on […]
Kirk Pepperdine talks with IEEE Software editor in chief Diomidis Spinellis about performance optimization. Topics include development practices, tools, as well as the role of software architecture, programming languages, algorithms, and hardware advances. Topics include: how a performance diagnostic model containing the system’s components can help us understand what each component is responsible for and […]
Founder of Signal Sciences Zane Lackey talks with Kim Carter about Application Security around what our top threats are today, culture, threat modelling, and visibility, and how we can improve our security stature as Software Engineers. Related Links Web Application Security: Threats, Countermeasures, and Pitfalls Network Security with Haroon Meer Docker Security with Diogo […]
Bryan Reinero talks with Gregor Hohpe about IT Transformation, the process by which organizations adapt and reorganize themselves in response to the way our industry has evolved. Gregor discusses the role of the Enterprise Architect as a leader in the process of IT Transformation by assessing pressures affecting engineering teams, available technologies, and business goals […]
Bryan Reinero talks with Harsh Sinha, VP of Engineering at TransferWise, about Product Management. Product Management deals with the planning, delivery and marketing of a software product. The discussion covers how those functions are achieved, and how product management interfaces with engineering; how product requirements are derived from customer needs; how teams build product based […]
Ron Lichty talks with SE-Radio’s Nate Black about managing programmers. Topics include: why programming management is hard, what makes a good programming manager, the costs of micromanagement, self-organizing teams, team dynamics and motivation, and product team performance. Related links Ron Lichty’s blog Ron Lichty Consulting Managing the Unmanageable “If we’re Agile, why do we […]
Charlie Berger talks with SE Radio’s Edaena Salinas about predictive applications. What are predictive applications? How are they built? What’s the role of machine learning in predictive applications? The interview explores implementing machine learning algorithms natively in the database, different machine learning algorithms, and how they’re applied. Topics include: machine learning, databases, data architecture, predictive […]
Evgeny Shadchnev talks with Felienne about code schools, programs that prepare people to become software developers in a few months. This episode explores the idea of code schools. Can we really teach programming in a few months rather than years in university? Who teaches in those programs? Who attends them? What are their business models, and […]
Zachary Burt discusses freelancing as a career option with SE Radio’s Felienne. How does freelancing differ from employment? How should we handle personal marketing and sales? How do you find a work-life balance when you’re self-employed? The interview also covers practical tips such as deciding on an hourly rate and managing demanding customers. Related Links […]
Founder of Thinkst, Haroon Meer talks with Kim Carter about network security. Topics include how attackers are gaining footholds into our networks, moving laterally, infilling malware and exfilling our precious data; why we care; and clear advice on what we software engineers can do about it. Areas of information security are merging, network security is […]
Bryan Reinero talks with Jason Hand about handling outages and responding to failures. The episode explores basic problem-solving strategies and diagnostic techniques, organizing teams to address incidents efficiently, communicating with stakeholders, learning from incidents, and managing stress. Related Links Episode 284 – John Allspaw on System Failures: Preventing, Responding, and Learning From Episode 225 […]
Nate Black interviews Jonathan Stark on Mobile App development. Topics include: platforms for mobile development, making decisions about how to develop mobile apps, how to deploy mobile apps, native apps vs. progressive web apps, React Native, and the future of mobile applications. Jonathan shares his expert knowledge about the evolution of the mobile ecosystem and […]
Robert Blumen talks to JBoss Drools project lead Edson Tirelli about Rules Engines. The show covers: the nature of business rules; rules and facts; rules and actions; the importance or rules to a business; the structure of a business rule; how many is “a lot” of rules?; communication about rules between the business and software […]
Felienne talks with Moshe Vardi about P versus NP. Why is this problem so central to computer science? Are we close to solving it? Is it necessary to solve it? Progress toward computing hard problems efficiently with SAT solvers. How SAT solvers work,; applications of SAT like formal verification. Related Links TU Eindhoven P […]
Kishore Bhatia talks with Kieren James-Lubin about Blockchains. Topics include Blockchains, Cryptocurrency, Bitcoin, Distributed Ledger, Decentralized Apps, Ethereum, Smart Contract development with Solidity, ICO’s and Tokens. Related Links IEEE search for blockchains Blockchain TED Talk Ethereum Solidity Smart Contracts Truffle for testing Smart Contracts Guest Twitter: https://twitter.com/kjameslubin Guest Email: firstname.lastname@example.org
Edwin Brady speaks to Matthew Farwell about Type Driven Development and the Idris Programming language. The show covers: what a type is; static vs dynamic types in programming languages; dependent types; the Idris programming language; why Idris was created. Type safe printf modelling state in Idris modelling protocols in Idris modelling concurrency in Idris type driven development and how it changes the development process. Related […]
Felienne talks with Michael Feathers about Legacy Code. When is something legacy? Is working on legacy different from working on greenfield code? Do developers need different skills and techniques? Testing legacy code. How to test a legacy system? When do we have enough tests to feel safe to start coding? Techniques to make legacy systems […]
Asaf Yigal talks with SE Radio’s Edaena Salinas about machine learning in log analysis. The discussion starts with an overview of the structure of logs and what information they can contain. Asaf discusses what the log analysis process looks like without machine learning — and the role of humans in this – before moving on […]
Yakov Fain talks with SE Radio’s Matthew Farwell about the Angular web development framework. The show covers the philosophy behind Angular; who would want to use the platform; how an Angular application is composed, including how to handle form submission and validation; why Typescript was chosen for Angular; how Angular uses reactive programming (RxJS, in […]
Phillipp Krenn talks with SE Radio’s Jeff Meyerson about Elasticsearch, a scalable search index. The conversation begins with a discussion of search, how it compares to database queries, and what an inverted index is. Phillipp introduces Wikipedia as an example that runs throughout the episode because Wikipedia uses Elasticsearch to power its full-text search. A […]
Morgan Wilde talks with SE Radio’s Jeff Meyerson about the LLVM compiler toolchain. They begin with a discussion of how a compiler works and how compiled code executes against different processor architectures. Using the JVM as a model for interoperability, they move on to how LLVM is a system that optimizes an intermediate representation (IR), […]
Docker Security Team lead Diogo Mónica talks with SE Radio’s Kim Carter about Docker Security aspects. Simple Application Security, which hasn’t changed much over the past 15 years, is still considered the most effective way to improve security around Docker containers and infrastructure. The discussion explores characteristics such as Immutability, the copy-on-write filesystem, as well […]
James Turnbull rejoins the show with Robert Blumen for a conversation mostly about Terraform, as well as a bit about Puppet. Terraform is a declarative programming tool for automating infrastructure resource creation; it targets resource providers, such as Amazon AWS, Microsoft Azure, Digital Ocean, and other cloud and SAAS back ends. The discussion explores the […]
Francois Raynaud and Kim Carter discuss what’s wrong with the traditional delivery approach and why we need to change. They explore the dangers of retrofitting security to the end of projects, how to combine development, operations, and security people into the same development teams and why, along with cost-benefit analysis. Francois and Kim discuss the […]
Neal Ford of ThoughtWorks chats with SE Radio’s Kim Carter about the skills required to be a successful software architect, how to create and maintain them, and how to transition from other roles, such as software engineering. Neal discusses that the required skills can be learned, you do not have to be born with special […]
Edaena Salinas talks with Katie Malone about Machine Learning. Katie Malone is a Data Scientist in the Research and Development department at Civis Analytics. She has a PhD in Physics from Stanford University, with a background specifically in particle physics. She is an instructor of the Intro to Machine Learning online course from Udacity and […]
James Cowling of Dropbox (architect of their distributed storage system), speaks to Robert Blumen about their move from Amazon’s S3 to their own infrastructure; The show covers: the size, scope and scale of Dropbox’s data management; their experience on Amazon’s S3; why S3 over time did not meet their needs; how the decision was made […]
John Allspaw CTO of Etsy speaks with Robert Blumen about systemic failures and outages; how are systems defended against outages?; why do they fail anyway?; why are failures not entirely preventable?; why do outages involve multiple failures?; the time that Etsy identified it’s own office as a potential source of fraud; the human as part […]
Felienne talks with Alexander Tarlinder on Developer Testing. Topics include Developer Testing, Agile Testing, Programming by Contract, Specification Based Testing, Venue: KTH, Stockholm Related Links Alexander on Twitter https://twitter.com/alexander_tar Agile Testing: A Practical Guide for Testers and Agile Teams by Lisa Crispin and Janet Gregory https://www.amazon.com/Agile-Testing-Practical-Guide-Testers/dp/0321534468 Clean Code https://www.amazon.com/Clean-Code-Handbook-Software-Craftsmansh...more
Donny Nadolny of PagerDuty joins Robert Blumen to tell the story of debugging an issue that PagerDuty encountered when they set up a Zookeeper cluster that spanned across two geographically separated datacenters in different regions. The debugging process took them through multiple levels of the stack starting with their application, the implementation of the Zookeeper […]
Edaena Salinas talks with James Whittaker about Career Strategy in the technology field. James is a Distinguished Technical Evangelist at Microsoft. Throughout his career, he specialized in Software Testing, Security, and Storytelling. He is the author of “How Google Tests Software” and the viral blog post “Why I left Google”. Topics include: Career Management, the […]
Marcus Blankenship talks with Gerald Weinberg about software errors, the fallacy of perfection, how languages and process can reduce errors, and the attitude great programmers have about their work. Gerald’s new book, Errors: Bugs, Boo-boos, and Blunders, focuses on why programmers make errors, how teams can improve their software, and how management should think of […]
Eberhard talks with Florian Gilcher about the programming language Rust. Rust originates from Mozilla research. Its focus is on system programming and it is often used to replace C or C++. Topics include the concepts behind Rust; concurrent and safe programming; advanced and unique features like ownership and borrowing; the rust type system (which supports […]
Felienne talks with Peter Hilton on how to name things. The discussion covers: why naming is much harder than we think, why naming matters in programming and program comprehension, how to create good names, and recognize bad names, and how to improve your naming skills. Venue: Felienne’s residence, Rotterdam Related Links To camelcase or under_score by […]
Gil Tene joins Robert Blumen for a discussion of tail latency. What is latency? What is “tail latency”? Why are the upper percentiles of latency more relevant to humans? How is human interaction with an application influenced by tail latency? What are the economics of tail latency? What are the origins of tail latency within […]
Björn Rabenstein discusses the field of Site Reliability Engineering (SRE) with host Robert Blumen. The term SRE has recently emerged to mean Google’s approach to DevOps. The publication of Google’s book on SRE has brought many of their practices into more public discussion. The interview covers: what is distinct about SRE versus devops; the SRE […]
Marcus Blankenship talks with Josh Doody about salary negotiation. Topics include a framework for thinking about salary negotiations, how you can know what you’re worth, the employers view of salary negotiation, and missed negotiation opportunities. Also discussed are common fears about negotiating and how to overcome them, common mistakes during negotiations, and how negotiation makes […]
Felienne talks with Sam Aaron on Sonic Pi. Topics include how to design a programming language with a broad audience, what features enable a language to be powerful and fun for children to play with, what the role of programming and programming education is in the world in general and the world of music in […]
Sven Johann talks with Steve McConnell about Software Estimation. Topics include when and why businesses need estimates and when they don’t need them; turning estimates into a plan and validating progress on the plan; why software estimates are always full of uncertainties, what these uncertainties are and how to deal with them. They continue with: […]
Jeff Meyerson talks with Frances Perry about Apache Beam, a unified batch and stream processing model. Topics include a history of batch and stream processing, from MapReduce to the Lambda Architecture to the more recent Dataflow model, originally defined in a Google paper. Dataflow overcomes the problem of event time skew by using watermarks and […]
Jeff Meyerson talks to Idit Levine about Unikernels and unik, a project for compiling unikernels. The Linux kernel contains features that may be unnecessary to many application developers–particularly if those developers are deploying to the cloud. Unikernels allow programmers to specify the minimum features of an operating system we need to deploy our applications. Topics […]
Jeff Meyerson talks with Brian Brazil about monitoring with Prometheus, an open source tool for monitoring distributed applications. Brian is the founder of Robust Perception, a company offering Prometheus engineering and consulting. The high level goal of Prometheus is to allow developers to focus on services rather than individual instances of a given service. Prometheus […]
Eberhard Wolff talks with Phillip Carter about F#. A multi-paradigm programming language that supports object-oriented, imperative, and functional programming, F# can be used for a broad variety of applications. It’s an especially good fit for parallel programming and DSLs. Type interference allows F# code to be type safe even if no types are declared in […]
Kief Morris, cloud specialist at ThoughtWorks and author of the recent book Infrastructure as Code, talks to Sven Johann about why this concept is becoming increasingly important due to cloud computing. They discuss best practices for writing infrastructure code, including why you should treat your servers as cattle, not pets, as well as how to […]
Eberhard Wolff talks with Jürgen Höller about Reactive Spring. Reactive programming is a hot topic, but adoption has been slow in the enterprise. Spring 5 incorporates Reactor and the RxJava API to help Java developers build scalable high-performance web applications. The discussion explores architectural challenges, transactions, porting existing applications, and increased code complexity. Venue: GOTOcon Amsterdam […]
Charles Nutter talks to Charles Anderson about the JRuby language and the JVM as a platform for implementing programming languages. They discuss JRuby and its implementation on the JVM as an example of a language other than Java on the JVM. Venue: Skype Related Links Charles Nutter on Twitter: https://twitter.com/headius Charles Nutter on GitHub: https://github.com/headius JRuby […]
Johannes Thönes talks to Patrick Kua about the role of a technical lead and how people become tech leads. The show covers the definition of a tech lead, the responsibilities of the role and the challenges of becoming a tech lead. Venue: Internet Related Links Episode 228: Software Architecture Sketches with Simon Brown Article: A […]
Charles Anderson talks with James Phillips about service discovery and Consul, an open-source service discovery tool. The discussion begins by defining what service discovery is, what data is stored in a service discovery tool, and some scenarios in which it’s used. Then they dive into some details about the components of a service discovery tool […]
Stefan Tilkov talks to Camille Fournier about the challenges developers face when building distributed systems. Topics include the definition of a distributed system, whether developers can avoid building them at all, and what changes occur once they choose to. They also talk about the role distributed consensus tools such as Apache Zookeeper play, and whether […]
Sven Johann talks with Bill Curtis about Software Quality. They start with what software quality is and then discuss examples of systems which failed to achieve the quality goals (e.g. ObamaCare) and it’s consequences. They then go on with the role of architecture in the overall quality of the system and how to achieve it […]
David Heinemeier Hansson, creator of the Ruby on Rails framework and a partner at the software development company Basecamp, talks to Stefan Tilkov about the state of Ruby on Rails and its suitability for long-term development. He addresses some of its common criticisms, such as perceived usefulness for only simple problems, claimed lack of scalability, […]
Jeff Meyerson talks to Haoyuan Li about Alluxio, a memory-centric distributed storage system. The cost of memory and disk capacity are both decreasing every year–but only the throughput of memory is increasing exponentially. This trend is driving opportunity in the space of big data processing. Alluxio is an open source, memory-centric, distributed, and reliable storage […]
John Purrier talks with Jeff Meyerson about OpenStack, an open-source cloud operating system for managing compute resources. They explore infrastructure-as-a-service, platform-as-a-service, virtualization, containers, and the future of systems development and management. Cloud service providers like Amazon, Google, and Microsoft provide both infrastructure-as-a-service and platform-as-a-service. Infrastructure-as-a-service gives developers access to virtual machines, servers, and network infrast...more
Robert Blumen talks with Cody Voellinger, the founder of a recruiting firm that specializes in filling software engineer roles for San Francisco-area startups, about how jobs are created and how companies and engineers get matched up. Their discussion covers the entire job search process, from job descriptions to salary negotiations. They look at the job […]
Michael Nygard of “Release It!” fame talks with Stefan Tilkov about his experience using the Clojure programming language. Topics include the tool chain and development process, the Clojure learning curve, and on-boarding new developers. Michael explains the similarities and differences compared to typical OO languages when implementing domain logic, and uses both game development and […]
Stefan Tilkov talks with Jay Fields, author of the book Working Effectively with Unit Tests, about unit testing in practice. Topics include how to write good unit tests, what mistakes to avoid, and different categories of unit tests. Jay explains the value of unit tests and why you might want to delete them if you […]
Monica Beckwith joins Robert Blumen for a discussion of java garbage collection. What is garbage collection? GC algorithms; history of GC in the java language; fragmentation and compaction; generational strategies; causes of pauses; impact of pauses on application performance; tuning GC; GC on multi-core and large memory machines; should production servers be implemented in non-GC […]
Mike Barker talks with Sven Johann about the architecture of the LMAX system. LMAX is a low-latency, high-throughput trading platform. Their discussion begins with what LMAX does; the origins of LMAX; and extreme performance requirements faced by LMAX. They then delve into systems that LMAX communicates with; LMAX users; the two main components of the […]
Fred George talks with Eberhard about “Developer Anarchy” – a development approach Fred has been using very successfully in different organizations. Developer Anarchy is a manager-less process. All team members write code. There are no stories. Instead developers figure out how to reach specific business goals. Besides writing code some team members have additional responsibilities: […]
Robert Blumen talks to Christopher Meiklejohn about conflict-free replicated data types (CRDTs). The discussion covers forms of consistency in distributed systems; conflicts and conflict resolution algorithms; consistency and concurrency; the discovery of CRDTs; state-based and operations-based CRDTs; examples of some well-known CRDTs, including counters and sets; time and space complexity; uses of CRDTs in chat […]
Martin Klose talks with Eberhard Wolff about Coderetreats – events where developers practice techniques like test-driven development or refactoring in a safe environment to develop software craftsmanship. Martin talks about how Coderetreats work and why they are a great way to become a better developer. Also he explains the different types and the Global Day […]
Alex Budzier of the Oxford Saïd Business School and Jürgen Laartz of McKinsey Berlin join Robert Blumen to discuss their research on large IT project failures. The show covers: What is a “large” project? What is the definition of failure? Cognitive biases and project failures. Are some attributes of projects predictive of failure? The catastrophic […]
In this episode, SE Radio Host Stefan Tilkov talks to Vaughn Vernon about the topic of his most recent book, Reactive Messaging Patterns with the Actor Model. Vaughn explains the concepts and history of reactive programming, the actor model and its consequences, actors and their relation to object orientation, a typical approach for designing a […]
Sven Johann talks with Andrew Phillips about DevOps. First, they try to define it. Then, they discuss its roots in agile operations, its relationship to lean development and continuous delivery, its goals, and how to get started. They proceed to system thinking and what “You build it, you run it” means for a system when […]
John Wilkes from Google talks with Charles Anderson about managing large clusters of machines. The discussion starts with Borg, Google’s internal cluster management program. John discusses what Borg does and what it provides to programmers and system administrators. He also describes Kubernetes, an open-source cluster management system recently developed by Google using lessons learned from […]
Charles Anderson talks to John Sonmez, the author of Soft Skills—“the software developer’s life manual.” They start out discussing the book and what it covers, which is pretty much everything in a developer’s life outside of code. The book contains seven sections; they discuss two of them: “Career” and “Marketing Yourself.” John discusses the value […]
Gernot Starke talks about arc42: an open-source set of templates he developed to document software architecture based on his practical experience with real projects. Also Gernot and host Eberhard then discuss how documenting architecture fits into agile processes and how to find the right amount of documentation for a system. They walk through the different […]
Slava Akhmechet and Jeff Meyerson discuss RethinkDB, an open source database for the real-time Web. RethinkDB pushes data to the application rather than requiring the application to poll the database for updates. The discussion begins with the question of why databases need to be rethought–why is it better to build JSON-pushing into the database layer […]
Sven Johann talks with Dave Thomas about innovating legacy systems. Dave clarifies first why legacy systems are both valuable and problematic. Next, they discuss bad systemic and good incremental approaches for innovation of legacy systems; why you shouldn’t rewrite an old system but rather focus on tactical changes to reduce cost or increase productivity within […]
Kyle Kingsbury, known as Aphyr on Twitter and for his blog by the same name, talks to Stefan Tilkov about consensus in distributed systems and about his experience in testing systems to see how they behave in case of failures. In addition to discussing some of the theoretical foundations, such as the CAP theorem, isolation […]
Josh Long talks to Cédric Champeau about the latest and greatest in the Groovy JVM language, how it has evolved over the years, and where it’s going. They start by talking about the existing features in the language, the language’s history and then move on to discuss where the language is going, how Java 8 […]
Josh Long talks to Pivotal’s Andrew Clay Shafer about the state of platforms-as-a-service (PaaS; like Cloud Foundry). They cover how pass relates to the fast-evolving container-ready distributed runtimes such as Lattice, Kubernetes and Mesos. The discussion starts with a look at what PaaS means and moves on to how the technology has evolved, the community […]
Johannes Thönes talks to Linda Rising, author, speaker and independent consultant, about the Agile Brain. They start by talking about the fixed, talent-oriented mindset and then contrast with the learning-oriented mindset. After establishing the terms, Linda explains how we know which mindset we are in currently and how we can change it for us and others, […]
Show editor Robert Blumen begins with a history of the show, what he has been doing since he became the show editor a year ago, and where he wants the show to go in the future. The remainder of the show is a series of interviews with all of the active hosts, the founder of the […]
Johannes Thönes talks to Rebecca Parsons, Chief Technology Officer at ThoughtWorks, about evolutionary architecture. The practice of evolutionary software architecture means making decisions as late as possible (last responsible moment) and setting up cross-functional requirements that the architecture has to meet (architectural fitness function). In the beginning, Parsons and Thönes introduce the term evolutionary architecture and […]
Ben Hindman talks to Jeff Meyerson about Apache Mesos, a distributed systems kernel. Mesos abstracts away many of the hassles of managing a distributed system. Hindman starts with a high-level explanation of Mesos, explaining the problems he encountered trying to run multiple instances of Hadoop against a single data set. He then discusses how Twitter uses […]
Johannes Thönes talks to Barry O’Reilly, principal consultant at ThoughtWorks, about his recently published book Lean Enterprise. A lean enterprise is a large organization that manages to keep innovating while keeping its existing products in the market. O’Reilly talks about the idea of scientific experiments and the build-measure-learn loop popularized by the lean-startup method. He shares […]
Fangjin Yang, creator of the Druid real-time analytical database, talks with Robert Blumen. They discuss the OLAP (online analytical processing) domain, OLAP concepts (hypercube, dimension, metric, and pivot), types of OLAP queries (roll-up, drill-down, and slicing and dicing), use cases for OLAP by organizations, the OLAP store’s position in the enterprise workflow, what “real time” […]
Stefan Tilkov talks to Mark Nottingham, chair of the IETF (Internet Engineering Task Force) HTTP Working Group and Internet standards veteran, about HTTP/2, the new version of the Web’s core protocol. The discussion provides a glimpse behind the process of building standards. Topics covered include the history of HTTP versions, differences among those versions, and […]
Joshua Suereth and Matthew Farwell discuss SBT (Simple Build Tool) and their new book SBT in Action. They first look at the factors creating a need for build systems and why they think SBT—a new addition to this area—is a valuable contribution in spite of the vast number of existing build tools. Host Tobias Kaatz, […]
Flavio Junqueira is the author of Zookeeper: Distributed Process Coordination. Flavio and Jeff Meyerson begin by defining ZooKeeper and talking about what ZooKeeper is and isn’t. ZooKeeper can be thought of as a patch against certain fallacies of distributed computing: that the network is secure, has zero latency, has infinite bandwidth, and so on. With […]
Simon Brown, author of Software Architecture for Developers, talks with Sven Johann about using simple sketches to visualize, communicate and document software architecture. The show starts with a consideration of why sketches are more useful than UML and then continues with the explanation of the C4 model (context, containers, components and classes) and how it fits […]
Robert Blumen talks with Eric Brewer, who discovered the CAP (consistency, availability, partition tolerance) theorem. The first part of the show focuses on Brewer’s original thesis presented at the 2000 ACM Symposium on Principles of Distributed Computing (PODC): What set of problems motivated the formulation of CAP? How was it understood at the time? What are […]
Eberhard Wolff talks with Eric Evans, the founder of domain-driven design (DDD), about its impact after 10 years. DDD consists of domain-modelling patterns; it has established itself as a sound approach for designing systems with complex requirements. The show covers an introduction to DDD, how the community’s understanding of DDD has changed in the last […]
Senior performance architect and author of *Systems Performance* Brendan Gregg talks with Robert Blumen about systems performance: how the hardware and OS layers affect application behavior. The discussion covers the scope of systems performance, systems performance in the software life cycle, the role of performance analysis in architecture, methodologies for solving performance problems, dynamic tracing […]
In this episode, Sven Johann and Eberhard Wolff talk about technical debt and how to handle it. They begin by defining external and internal quality and then talk about technical debt as a metaphor for discussing quality with management. They then consider whether technical debt is bad and how to handle it by using Eric […]
Josh Long talks to Activiti cofounder Joram Barrez about the wide world of (open source) workflow engines, the Activiti BPMN2 engine, and what workflow implies when you’re building process-driven applications and services. Joram was originally a contributor to the jBPM project with jBPM founder Tom Baeyens at Red Hat. He cofounded Activiti in 2010 at […]
Nathan Marz is the creator of Apache Storm, a real-time streaming application. Storm does for stream processing what Hadoop does for batch processing. The project began when Nathan was working on aggregating Twitter data using a queue-and-worker system he had designed. Many companies use Storm, including Spotify, Yelp, WebMD, and many others. Jeff and Nathan […]
Johannes Thönes interviews Jez Humble, senior vice president at Chef, about continuous delivery (CD). They discuss continuous delivery and how it was done at Go, CD, and HP firmware; the benefits of continuous delivery for developers; Conway’s law and cross-functional teams; scary releases and nonscary releases; fix-forward, blue-green deployments, and A/B testing; origins of continuous […]
Robert Blumen talks to Jon Gifford of Loggly about logging and logging infrastructure. Topics include logging defined, purposes of logging, uses of logging in understanding the run-time behavior of programs, who produces logs, who consumes logs and for what reasons, software as the consumer of logs, log formats (structured versus free form), log meta-data, logging […]
Jeff Meyerson talks to Jun Rao, a software engineer and researcher (formerly of LinkedIn). Jun has spent much of his time researching MapReduce, scalable databases, query processing, and other facets of the data warehouse. For the past three years, he has been a committer to the Apache Kafka project. Jeff and Jun first compare streaming […]
Guest Udi Dahan talks with host Robert Blumen about the CQRS (command query responsibility segregation) architectural pattern. The discussion begins with a review of the command pattern. Then a high-level overview of CQRS, which consists of a separation of a command processing subsystem that updates a write model from one or more distinct and separate, […]
James Turnbull joins Charles Anderson to discuss Docker, an open source platform for distributed applications for developers and system administrators. Topics include Linux containers and the functions they provide, container images and how they are built, use cases for containers, and the future of containers versus virtual machines. Venue: Internet Related Links James’s home page: […]
Adrian Cockcroft discusses the challenges in creating a dynamic, flexible, cloud-based platform with SE Radio host Stefan Tilkov. After briefly discussing the definition of “cloud computing,” Adrian explains the history behind Netflix’s move to the cloud (which he led). After highlighting some of the differences that have developers and architects must face, Adrian talks about […]
Johannes Thönes talks with Erich Gamma, Ralph Johnson and Richard Helm from the Gang of Four about the 20th anniversary of their book Design Patterns. They discuss the following topics: the definition of a design pattern and each guest’s favorite design pattern; the origins of the book in architecture workshops; the writing of the book […]
Grant Ingersoll, founder and CTO of LucidWorks, talks with Tobias Kaatz about his book Taming Text: How to Find, Organize, and Manipulate It. They begin by discussing popular existing systems for the automated understanding of contextual information. One such system, IBM Watson, drew attention for its victory in the “Jeopardy” game show. They proceed to […]
Johannes Thönes talks to James Lewis, principal consultant at ThoughtWorks, about microservices. They discuss microservices’ recent popularity, architectural styles, deployment, size, technical decisions, and consumer-driven contracts. They also compare microservices to service-oriented architecture and wrap up the episode by talking about key figures in the microservice community and standing on the shoulders of giants. Recording […]
Tobias Kaatz talks to former Kixeye CTO Randy Shoup about company culture in the software industry in this sequel to the show on hiring in the software industry (Episode 208). Prior to Kixeye, Randy worked as director of engineering at Google for the Google App Engine and as chief engineer and distinguished architect at eBay. […]
Johannes talks with Rachel Laycock and Max Lincoln from ThoughtWorks about continuous delivery on Windows. The outline includes: introduction to continuous delivery; continuous integration; DevOps and ChatOps; decisions to be taken when implementing continuous delivery on windows; build tools on windows; packaging and deploy on windows; infrastructure automation and infrastructure as code with chef, puppet […]
Micro services is an emerging trend in software architecture that focuses on small, lightweight applications as a means to avoid large, unmaintainable, monolithic systems. This approach allows for individual technology stacks for each component and more resilient systems. Micro services uses well-known communication schemes such as REST but also require new technologies for the implementation. […]
Josiah Carlson discusses Redis, an in-memory single-threaded data structure server. A Redis mailing list contributor and author, Josiah talks with Robert about the differences between Redis and a key-value store, client-side versus server-side data structures, consistency models, embedding Lua scripts within the server, what you can do with Redis from an application standpoint, native locking […]
With this episode, Software Engineering Radio begins a series of interviews on social/nontechnical aspects of working as a software engineer as Tobias Kaatz talks to Randy Shoup, former CTO at KIXEYE, about hiring in the software industry. Prior to KIXEYE, Randy worked as director of engineering at Google for the Google App Engine and as […]
Charles Anderson talks to Mitchell Hashimoto about the Vagrant open source project, which can be used to create and configure lightweight, reproducible, and portable development environments. Vagrant aims to make new developers on a project productive within minutes of joining the project instead of spending hours or days setting up the developer’s workstation. The outline […]
Johannes Thönes talks to Dr. Ken Collier, Director of Agile Analytics at ThoughtWorks about Agile Analytics. The outline includes: descriptive analytics, predictive analytic and prescriptive analytics; artificial intelligence, machine learning, data mining and statistics; collaborative filtering; data science and data scientists; data warehousing and business intelligence; online analytical processing (OLAP), extract transform load (ETL), feature […]
Eberhard Wolff talks with Martin Lippert of Pivotal about the Eclipse Flux project. This projects is in its early stages — and has a very interesting goal: It aims to put software development tools into the cloud. It is a lot more than just an IDE (integrated development environment) in a browser. Instead the IDE […]
Robert talks to Dr. Anil Madhavapeddy of the Cambridge University (UK) Systems research group about the OCaml language and the Mirage cloud operating system, a microkernel written entirely in OCaml. The outline includes: history of the evolution from dedicated servers running a monolithic operating system to virutalized servers based on the Xen hypervisor to micro-kernels; […]
Leslie Lamport won a Turing Award in 2013 for his work in distributed and concurrent systems. He also designed the document preparation tool LaTex. Leslie is employed by Microsoft Research, and has recently been working with TLA+, a language that is useful for specifying concurrent systems from a high level. The interview begins with a […]
Andrew Gerrand works on the Go programming language at Google. His conversation with Jeff begins with a history of the language, including the details behind how Go was conceived and how the open source community contributes to it. Andrew explains how Go intends to simplify problems which have been motifs as Google has scaled. The […]
Martin Thompson, proprietor of the blog Mechanical Sympathy, founder of the LMAX disruptor open source project, and a consultant and frequent speaker on high performance computing talks with Robert about computer program performance. Martin explains the meaning of the term “mechanical sympathy,” derived from auto racing, and its relevance to program performance: the importance of […]
For Episode 200 of Software Engineering Radio, Diomidis Spinellis interviews Markus Völter, the podcast’s founder. Markus works as an independent researcher, consultant, and coach for itemis AG in Stuttgart, Germany. His focus is on software architecture, model-driven software development and domain specific languages as well as on product line engineering. Markus also regularly publishes articles, […]
Recording Venue: Skype Guest: Michael Stonebraker Dr. Michael Stonebraker, one of the leading researchers and technology entrepreneurs in the database space, joins Robert for a discussion of database architecture and the emerging NewSQL family of databases. Dr. Stonebraker opens with his take on how the database market is segmented around a small number of use […]
Recording Venue: WebEx Guest: Wil van der Aalst Robert Blumen interviews Professor Wil van der Aalst of the Technical University of Eindhoven, one of the world’s leading researchers in business process management and workflow systems. Professor van der Aalst leads off with an overview of the main concepts in the field business processes, business process […]
Recording Venue: WebEx Guest: Lars Vogel Lars Vogel, consultant, Eclipse committer, and owner of vogella.com, gives an overview of the Android operating system. His conversation with Jeff begins with a definition of Android and a brief history. Android is an operating system programmed in Java. It can be found on different types of devices such […]
Recording Venue: WebEx Guest: Jim Benson Jim Benson is CEO of Modus Cooperandi, a collaborative management consultancy in Seattle, Washington. After being steeped in Agile for many years, Jim started working with Kanban and Lean thinking in 2005. In 2008, he started taking this idea further with Personal Kanban, which brings flow based work to the […]
Recording Venue: WebEx Guest: Ellen Gottensdiener and Mary Gorman Ellen Gottensdiener and Mary Gorman of EBG Consulting talk with Neil Maiden about agile projects, requirements practices and their new book entitled Discover to Deliver: Agile Product Planning and Analysis. The conversation begins with an exploration of how agile has changed requirements and project practices over the […]
Recording Venue: Skype Guest: Michael Hunger Michael Hunger of Neo Technology, and a developer on the Neo4J database, joins Robert to discuss graph databases. Graph databases fall within the larger category of NoSQL databases but they are not primarily a solution to problems of scale. They differentiate themselves from RDBMS in offering a data model built […]
Recording Venue: Skype Guest: Grant Ingersoll Grant Ingersoll, founder of the Mahout project, talks with Robert about machine learning. The conversation begins with an introduction to machine learning and the forces driving the adoption of this technique. Grant explains the three main use cases, similarity metrics, supervised versus unsupervised learning, and the use of large data […]
Recording Venue: Swiss Federal Institute of Technology, Zürich Guest: Georg von Krogh Open source development has had a major impact on both private and public development and use of software. This is an interview with one of the key researchers on open source development, Professor Georg von Krogh of the Swiss Federal Institute of Technology in […]
Recording Venue: Skype Guest: Douglas C. Schmidt In this episode we talk with Douglas C. Schmidt, who is a professor of computer science at Vanderbilt University and a well-respected authority in the fields of patterns and frameworks for concurrent and networked software. In this interview we talk about these topics in the context of massive […]
Recording Venue: WebEx Guest: Christof Ebert Christof Ebert, managing director of Vector Consulting Services talks with Frances Paulisch on his insights to how lean applies to product development. The interview centers around five key principles of lean development, namely end-to-end focus on creating value for the customer, eliminating waste, optimizing value streams, empowering people, and […]
Recording Venue: Skype Guest: Eric Lubow Eric Lubow and Robert discuss polyglot persistence, a term used to describe systems that incorporate multiple specialized persistent stores rather than a single general-purpose database. Eric provides insights into the forces driving this trend: including diverse data usage patterns, low latency, and increasing volumes of data. The emergence of […]
Recording Venue: Paddington, London Guests: Suzanne Robertson and James Robertson, Atlantic Systems Guild Neil Maiden, Editor of the Requirements column in IEEE Software, talks with Suzanne and James Robertson of the Atlantic Systems Guild about the emergence and impact of agile practices on requirements work. The interview begins with an exploration of how agile practices have […]
Recording Venue: Lucene Revolution 2012 (Boston) Guest: Grant Ingersoll Grant Ingersoll, a committer on the Apache Solr and Lucene, talks with Robert about the problems of full-text search and why applications are taking control of their own search, and then continues with a dive into the architecture of the Solr search engine. The architecture portion of the […]
Recording Venue: Skype Guest: Martin Fowler and Pramod Sadalage In this episode, we talk with Pramod Sadalage and Martin Fowler about database evolution and agile database development. We discuss the basic challenges for working with a database in an agile development culture and how to include database design and most of all, database evolution, in […]
Recording Venue: MongoSF, San Francisco Guest: Dwight Merriman As application data size and throughput have outgrown the processing and storage needs of commodity servers, replication has become an increasingly important strategy. In this episode, Robert talks with Dwight Merriman about database replication. Topics covered include replication basics, master-slave versus master-master, failure and recovery, replication versus […]
Recording Venue: Phone Guest: Jeff Frey System z, or the Mainframe, holds most of us in awe — the ultimate computing platform, referenced in Hollywood as well as by those who thought they were dealing with “legacy” systems — but what does Mainframe really mean? What does its stack look like? This leading virtualized infrastructure […]
SE Radio will continue producing podcasts under the wings of IEEE Software, a respected magazine published by the IEEE Computer Society.
In this episode, Markus talk with Martin Fowler and Rebecca Parsons about domain-specific languages.
In this episode we talk with Rini van Solingen about scrum and agile software development in distributed settings.
In this episode Michael interviews Jurgen Appelo on the topic of leading agile developers.
Cassandra is a distributed, scalable non-relational data store influenced by the Google BigTable project and many of the distributed systems techniques pioneered by the Amazon Dynamo paper.
This episode is a conversation with Jonas Boner about Akka.
Recording Venue: Phone Guest: Steve Will IBM i (formerly known as OS/400) is an advanced object-based operating system by IBM that runs thousands of businesses around the world. Steve Will, the Chief Architect of IBM i speaks with us about the history, technical features, and underlying architecture discussing the concepts of Single Level Store, integrated […]
We talk with Martin Laforest about topics ranging from how quantum computing works, which different models of quantum computing are explored, current and future uses of the approach as well as the current state of the art.
We discuss characteristics and performance properties of modern games and outline the challenges for software development.
Guest: Wilbert Albers Host: Markus In this episode we take a look at microchip production, with a special focus on waferscanners. To do this, we talked with Wilbert Albers of ASML, the leading waferscanner manufacturer in the world. In the episode, we talk about the overall chip production process (from silicon sand over wafer cutting […]
Recording Venue: University of Passau Guest: Sven Apel Host: Stefan In this second episode on Feature-Oriented Software Development (FOSD), Sven Apel gives us an overview of programming language and tool support for FOSD. He introduces the Eclipse-based FeatureIDE which covers important phases of the FOSD process, namely domain implementation as well as configuration and generation. […]
Sven Apel explains why developing software in a feature-oriented manner is so vital for us as software engineers and why objects are simply not enough.
This episode is an update on the developments around the Scala language.
In this episode Michael talks with Bas Vodde about how to apply agile principles to large and distributed development organizations.
In this episode, Robert talks with Nati Shalom about the emergence of large-system architectures consisting of a grid of high-memory nodes.
This episode is about being a consultant in the software business.
In this episode we talk with Kent Beck about automated unit testing and JUnit.
This time we have John Wiegand on the mic for an episode on architectures and agile software development. We talk about the role of architectures in an agile world and why architectures change and need to change over time. We discuss the characteristics of those living architectures, using the Eclipse and the Jazz projects as examples, and the surrounding development methods for such environments.
Dwight Merriman talks with Robert about the emerging NoSQL movement, the three types of non-relational data stores, Brewer's CAP theorem, the weaker consistency guarantees that can be made in a distributed database, document-oriented data stores, the data storage needs of modern web applications, and the open source MongoDB.
This episode covers the topic of agile testing. Michael interviews Lisa Crispin as an practionier and book author on agile testing. We cover several topics ranging from the role of the tester in agile teams, over test automation strategy and regression testing, to continuous integration.
Announcement regarding the release cycle.
Jay Kreps talks about the open source data store Project Voldemort. Voldemort is a distributed key-value store used by LinkedIn and other high-traffic web sites to overcome the inherent scalability limitations of a relational database. The conversation delves into the workings of a Voldemort cluster, the type of consistency guarantees that can be made in a distributed database, and the tradeoff between client and the server.
In this episode, we discuss with Roman Pichler how Scrum impacts product management and how agile product management differs from traditional approaches. The topics covered include product owners on large projects and product owner teams, facilitating customer feedback through early and frequent releases, envisioning the product, and creating products with the minimum functionality. Enjoy!
This episode is a conversation with Ramnivas Laddad about aspect-oriented programming (AOP), Aspect J, and Spring AOP. We review the fundamental concepts of AOP, discuss AspectJ (an open source compiler that extends java with support for AOP), and cover the Spring Framework's proxy-based AOP system. Laddad also gives his thoughts on the use cases for AOP and where we are in the technology adoption curve, and updates on the state of the AspectJ project itself.
This episode is a conversation with Scott Meyers about the upcoming C++0x standard. We talk a bit about the reasons for creating this new standard and then cover the most important new features, including upport for concurrency, implicitly-typed variables, move semantics, variadic templates, lambda functions, and uniform initialization syntax. We also looked at some new features in the standard library.
This episode is a coversation with Rich Hickey about his programming language Clojure. Clojure is a Lisp dialect that runs on top of the JVM that comes with - among other things - persistent data structures and transactional memory, both very useful for writing concurrent applications.
Philip Zeyliger of Cloudera discusses the Hadoop project with Robert Blumen. The conversation covers the emergence of large data problems, the Hadoop file system, map-reduce, and a look under the hood at how it all works. The listener will also learn where and how Hadoop is being used to process large data sets.
This episode is part of our series on agile software development. We talk with David Anderson about Kanban, an agile software development method that is quite different from most of the other agile methods out there. We discuss the basic ideas behind Kanban, the differences between Kanban and Scrum and when and why projects can benefit from using Kanban. This episode is done in cooperation with the German magazine ObjektSpektrum (thanks for sharing this interview with us).
In this episode Johannes Link interviews Lasse Koskela - the author of "Test-Driven" - about test-driven development (TDD). We cover the basics, the rationale behind it and the challenges you face when doing it in more difficult environments.
This is a conversation with Ola Bini on his experimental language Ioke. We cover the idea behind the Ioke experiment as well as important language concepts and the thinking behind them.
This episode is a conversation with Jan Bosch about product line engineering (PLE). Jan has worked in various roles and industries and academia in the context of product lines. In this episode we look at Jan's view of what is next for product lines: software ecosystems. What is their relationship to PLE and how should PLE change to remain relevant?
Our guest Johan Bezem explains the idea behind and the benefits of MISRA. MISRA defines guidelines for C and C++ programming in order to ensure quality. While it got started for embedded automotive development, it is more generally applicable.
This episode is a discussion with Shane Clifford, who is a development manager at Intentional Software. We discuss the idea behind intentional programming, key concepts of the technology as well as example uses and a little bit of history.
This episode is a conversation with "Uncle Bob" Bob Martin about agile software development and software craftsmanship specifically. We talk about the history of the term, the reasons for coming up with it some of the practices and the relationship to other agile approaches. We conclude our discussion with an outlook on some of todays new and hyped programming languages.
Michael discusses with his guest Chuck Connell the differences between software engineering and computer science. What makes software engineering so unpredictable, with so few formal results? And how can we advance the field of software engineering without these results?
Dave explains why reading source code is at least as important a skill as writing source code. He shares approaches for how to get to grips with unknown and undocumented source code even if it is non-trivial in size. He finishes with advice for how to get started reading code.
Michael and Markus discuss what makes a good R&D manager and how to potentially become an R&D manager. You will learn what some of the essential skills are, what the challenges are, and what the 'mission/vision/strategy thing' is actually good for.
This episode is a discussion with various authors of patterns reviewed at EuroPLoP 2009. Topics include Product Line Engineering, Distributed Development, Open Source and Embedded Systems
In this episode we discuss the current state of the spring framework. We talk about core features (dependency injection, AOP) but also about the spring universe, i.e. some of the more specific frameworks such as Spring Batch.
In this episode we talk with Doug Simon from Sun Microsystems Laboratories about the Maxine Research VM, a so-called meta-circular virtual machine. Maxine is a JVM that is written itself in Java, but aims at taking JVM development to the next level while using highly integrated Java IDEs as development environments and running and debugging the VM itself directly from the Inspector, an IDE-like tool specialized for the Maxine VM. During the episode we talk about the basic ideas behind Maxine, wh...more
This episode is a discussion with Jim Des Rivieres about APIs: How to design good APIs, the role of the documentation/specification in APIs, API evolution and other relevant topics.
This is another episode recorded at OOP 2009, thanks to SIGS Datacom and programme chair Frances Paulisch for making this possible. Here is the abstract from the conference program: Many software systems have fragile architectures that are based on brittle assumptions or rigid architectures that reduce options and make change difficult. On the one hand, an architecture needs to be fit for the present day, suitable for immediate use, and on the other it needs to accommodate the future, absorbing ...more
In the first part of this episode we discuss a couple of basics about SecondLife (scaling, partitioning, etc). The second part specifically looks at how the dev team tackled a number of interesting problems in the context of executing their own LSL scripting language on top of Mono.
This episode is a conversation with Gilad Bracha about Newspeak, type systems in general and optional/pluggable types in particular. It was recorded during DSL Devcon in the gardens of the Microsoft campus, and thanks to Gilad's "speaking like a book" way of talking it is published completely unedited :-)
This episode is once again with Linda Rising, this time on the book she coauthored with Mary Lynn Manns on introducing ideas into organizations. The talk is another one of the SE Radio Live sessions recorded at OOP 2009 - thanks to SIGS Datacom and programme chair Frances Paulisch for making this possible.
In this episode, Allan shares his insights about how learning is a necessary part of software development. He covers the personal as well as the team and the organizational level and offers practical advice.
In this episode, Arno talks to Jim Melton about the SQL programming language. In addition to covering the concepts and ideas behind SQL, Jim shares stories and insights based on his many years' experience as SQL specification lead.
In this episode, Dirk talks with David Frankel, resident Metamodeller and MDA expert at SAP Labs LLC, SAP's subsidiary in the Silicon Valley. Dave's extensive experience provides a big picture, from the early days of CORBA all the way to current issues that are bugging most enterprise architects' work with MDA.
In this episode Michael interviews one of our regular listeners: Petri Ahonen. Petri introduces Software Configuration Management by defining key terms and describing relevant concepts.
This episode is a discussion with Michael Nygard about his book "Release It" which covers aspects of software architecture you often don't think of initially when starting to build a system. Some of the points we discussed were capacity planning, recovery as well as making the system suitable for operation in a data center.
In this episode Markus discusses with Chris Read basics and some advanced topics in the space of continuous integration. We cover concepts, some tools, as well as a number of best practices.
This is a discussion with Eoin Woods about his collection of top 10 software architecture mistakes. Looking at things that don't work is always a good way to learn what you should actually do.
This episode is an interview with Tom DeMarco and Peter Hruschka about the new book of the Altantic Systems Guild: Adrenaline Junkies and Template Zombies: Understanding Patterns of Project Behavior. This is a session recorded live at OOP 2009. SE Radio thanks Tom and Peter, SIGS Datacom and the programme chair, Frances Paulisch, for their great support!
This episode is a discussion about code and metrics visualization with Michele Lanza. Michele invented the Code Cities idea about which he talks in this episode.
This episode is a discussion about F# with Microsoft's F# program manager Luke Hoban.
The majority of hacker attacks (70 %) are directed at weaknesses that are the result of problems in the implementation and/or architecture of the application. This session shows how you can protect your web applications (J2EE or .NET) against these attacks. The session covers lots of practical examples and techniques for attack. Furthermore, it shows strategies for defense, including a "Secure Software Development Lifecycle". A "Live Hacking" demo rounds it out. This is a session recorded liv...more
This episode is an introduction to user interface design with Joachim Machate of UID. We talk about the importance of user interface design, about its relationship to the overall software engineering process, as well as about UID's process for systematic user interface design.
In this episode we take a brief look at Jetbrains' Meta Programming System, a language workbench for creating external DSLs or for extending existing languages (such as Java). In a brief telephone discussion, Konstantin Solomatov explains what the system does and how it works. The system has recently been released into public beta and will be made available under then Apache 2.0 Open Source license.
In this episode Martin talks with Chris Grindstaff about the fundamentals of performance engineering. The episode discusses when and how to work on performance of client- and server-side systems, what you should take into account during development to avoid performance issues, typical situations that cause performance problems, and some common pitfalls when analysing performance.
In this episode we look at SUN's open source strategy for the OpenJDK. We discuss challenges in creating such a big open source project, and ways to keep it focused and organized. We discuss what it means for the Java runtime to be adopted as the technological foundation for other programming languages.
In this episode we discuss Microsoft's OSLO platform with Doug Purdy and Don Box. We briefly discuss what OSLO is in general and then look at the various components of OSLO. We also look at how OSLO fits in with the general Microsoft strategy and how it compares to other DSL/Model-driven approaches. We then look at language modularization and composition and discuss the similarities with XML and Smalltalk. Finally, we discuss possible integrations of OSLO with other MD* approaches and technologi...more
This is a discussion with Janos Sztipanovits about Cyber Physical Systems and how DSLs are used to approach some of the challenges in that domain. Specifically, in the second part we talk about formalizing DSL semantics.
In this episode, Michael Plöd is interviewed about Object-Relational Mapping technology. He talks about the common concepts, compares the range of different tools that go by this name, and goes into the design and architectural consequences of using an OR mapper.
In this episode we're talking to Anneke Kleppe about model-driven software development and language engineering. We start with her involvement in the creation of the Object Constraint Language (OCL) and discuss the intial expactations, actual experiences, and the place of OCL in the current day. From here, Anneke talks us through her take on the formative years of UML and MDA. From here, we expand to the realm of Domain-Specific Languages and Anneke discusses their place in software engineering ...more
In this episode, Markus talks with Juha-Pekka Tolvanen about using DSLs and code generation in practice. The main part of the episode is the discussion about a number of case studies that show how DSLs and code generation are used in practice. Omega Tau, Markus' new podcast mentioned in the beginning of the show
In this episode we're talking to Eelco Visser about parsing text. We start at the basics - what is parsing? - covering classic tools such as Yacc and classic parsing approaches such as LALR before examining how more recent approaches such as scannerless parsing can make parsing easier and enable previously impractical use cases.
In this episode we're talking to Bran Selic of Malina Software about modelling in general and UML2 in particular. Bran covers the basics of modelling, the history of UML, and what's new in UML2.
In this episode we're talking to James A. Hendler about the semantic web. We start with a definition of the semantic web and by discussing the main ingredients. We then look at (more or less) related topics such as prolog, artificial intelligence, wisdom of the crowds, and tagging. In the next section we discuss the core semantic web technologies: RDF, OWL, inference engines, SPARQL, and GRDDL. We conclude our discussion by looking at the status of the semantic web today and a couple of example ...more
During Evolution of a software system, it becomes more and more difficult to understand the originally planned software architecture. Often an architectural degeneration happens because of various reasons during the development phases. In this session we will be looking how to avoid such architectural decay and degeneration and how continuous monitoring can improve the situation (and avoid architectural violations). In addition we will look at "refactoring in the large" and how refactoring can b...more
In this episode we talk to Christof Ebert about requirements engineering. As the name "engineering" suggests, we need to be systematic when working and managing requirements. Christof will structure RE into several activities, namely elicitation (identifying the relevant requirements), specification (clearly describing requirements), analysis (synthesizing a solution), verification and validation (achieving good requirements quality), comittment (allocating requirements to a project, product rel...more
In this episode we talk with Jeff McAffer about building platforms. We start with a brief discussion about what a platform is in contrast to a framework or an application. Drawing from his experiences working on the Eclipse platform for years, Jeff talks with us about how to develop platforms, why developing a platform is different from developing an application, what makes a good platform great, and why API design becomes so extremely important for platforms. He provides us with some insights o...more
This is the second part of the two part topic on roles in software engineering. Michael and Markus discuss role definitions in a corporate environment. For several typical roles we give hints on the expected skills, knowledge, and mindset. In this episode we discuss the roles technical lead, technologist, requirements engineer, product manager, and project manager.
In this episode we discuss the status of SE Radio today and introduce the team members. Among other things, Markus discusses stats, sound quality, partners, transcripts, and the cooperation with Hillside Europe. Also, the team members introduce themselves with a one to two minute clip.
This is the first part of a two part topic on roles in software engineering. Michael and Markus discuss role definitions in an corporate environment. For several typical roles we give hints on the expected skills, knowledge, and mindset. In this episode we discuss the roles junior developer, senior developer, and software architect.
In this episode we discuss with Randy Shoup, Distinguished Architect at eBay, about architectural pinciples and patterns used for building the highly scalable eBay infrastructure. The discussion is structured into four main ideas: partition everything, use asynchrony everywhere, automate everything, and design the system keeping in mind that everything fails at some point in a large distributed system.
We start our discussion with a brief look at what Haskell is and how a pure functional language is different from non-pure languages. We then look at the basic building blocks and the philosophy of the language, discussing concepts such as the lambda calculus, closures, currying, immutability, lazy evaluation, memoization, and the role of data types in functional languages. A significant part of the discussion is then spent on the management of side effects in a pure language - in other words, t...more
This episode is a discussion with Andrew Watson, Technical Director of the Object Management Group. The episode is structured into five parts. We start with the history of the OMG and its early work. Then we look at the set of standards it has been (or is currently) working on. Next is a discussion of the standardization process used by the OMG, including the much-debated topic of compliance testing. We then look at OMG's relationship to other standards bodies (W3C, OASIS). Finally Andrew and ...more
This episode is a systematic introduction to Aspect Oriented Programming (in contrast to the interview with Gregor Kiczales). We discuss the fundamentals of AOP, define many of the relevant terms and also look at how and where AOP is used in practice, as well as at some current research trends.
In this episode we're talking to Linda Rising about retrospectives. We start by defining what a retrospective is and discuss some of the logistics of making it work for software projects. We then look at the different phases of a retrospective. The main part then is a discussion about some of the practices or games that are used to facilitate the retrospective. We conclude the retrospective discussion with destroying some of the prejudices against it and the relationship to process improvement a...more
In this episode we talk with Klaus Marquardt about building systems out of plugins. After briefly introducing the concept of a plugin in contrast to modules and related software engineering concepts, we discuss different views on plugins and different ways of working with plugins for developing software. We are looking at plugins for embedded systems as well as large business systems, at how plugins change the working mode and team organization, and discuss the possibilities of why and when to u...more
In this episode we're talking to Jens Coldewey about his experiences in 10 years of introducing agile techniques to project teams. We discuss real-world examples and the lessons learned and strategies derived from them.
In this espisode we take a closer look at relational database systems and the concepts behind them. We start by discussing the relational paradigm, its concepts and ramifications, and go on to architectural aspects.
In this episode we're talking to Andreas Zeller. about debugging. We started the discussion with an explanation of what debugging and how it works in principle. We then briefly discussed the relationship between debugging and testing. Next was the importance of the scientific method for debugging. We then looked as debugging as a search problem, leading to a discussion about delta debugging, the main topic of this discussion. We concluded the discussion by looking at the practical usability of ...more
In this episode we're talking to Hans-Joachim Popp, CIO at DLR about software in space. We start out by reviewing some well-known accidents of unmanned space flight that were caused by software faults and use this as a motivation to discuss how to avoid these in the future. We discuss culture, process, techniques and tools that DLR uses to create high-quality software for use in unmanned space systems.
This episode takes a close look at transactions from different angles, starting with their fundamental properties of Atomicity, Consistency, Isolation, Durability but also investigating advanced topics like distributed or business transactions.
In this episode we discuss REST (Representational State Transfer) with Stefan Tilkov. We started out by discussing the 5 steps to REST: IDs, links, Standard Methods, multiple representations and stateless communication. We then looked at how to use HTTP for REST, and discussed about how to use it for Web Services. We then we discussed whether and how to use REST for enterprise applications, and not just for apps on the internet. We concluded the discussion with a couple of recommendations.
In this episode we have the pleasure of talking to Anders Hejlsberg, Chief Language Strategist at Microsoft. We started by discussing his more distant past, namely, his involvement with Turbo Pascal and Borland's Delphi. We then looked at the influences Delphi had on C# and how C# evolved from Delphi. In the next section we discussed a couple of general language design issues, among them components and checked vs. unchecked exceptions. Next, we discussed interesting issues about languages of the...more
This episode is the long-awaited (and much requested) interview with Krzysztof Czarnecki, the author, together with Ulrich Eisenecker, of the book Generative Programming. In the interview we discussed the state of generative programming today and related it to model-driven development and DSLs. We then talked a little bit about product lines in general. We then discussed his current field of research, which currently focusses on framework-specific modeling languages and non-trivial roundtrip...more
In this episode we talk to Matthew Wall (Guardian News and Media) and Erik Doernenburg (Thoughtworks) about their work on the new guardian.co.uk website. We discuss the challenge of scalability and interactivity, their use of Domain Driven Design, some of the technical building blocks as well as the approaches they use for performance measuring and scalability tuning.
In this episode we're talking to Dirk Riehle about open source business models. We started looking at the way OS projects work and defined different kinds of open source projects. In the main part of the discussion we looked at various ways of how to make money with open source: consulting, support contracts, commercial variant of an open source project, etc. We then looked at the chances and risks of each of these approaches. The next part focused on different open source licenses and how they ...more
In this episode, Markus talks to Rebecca Wirfs-Brock on what she has learned from architecture reviews. This is a very complement to the earlier episode on architecture evaluation.
In this Episode, Arno talks with Oliver Jucknath about the art of writing computer games. A lot of myth is attached to this area of computing, and while a game technically is just another program, it is written in a different context than typical business applications. This is true at the code level, where aggressive optimization is a focus throughout development. It also applies at the team level, where collaboration between specialists is pronounced. And the business context is different as...more
In this episode, we talk with Kevlin Henney about the C++ programming language. We look at the history and the culture of the language, and how it went through several phases in its evolution. We also take a look at some of the special language features of C++ and their overall influence.
In this episode Charles Krueger, a well-known member of the product line engineering community, talks about his long term experiences in the field. Charles is also the founder and CEO of a company that provides tooling for variability management and product derivation. Besides some clarifications on terms like product line architecture and reference architecture, you also learn what kind of preconditions need to exist before product line engineering can be applied successfully.
In this Episode we're talking about Erlang with its creator Joe Armstrong. We started by looking at the history of the Erlang language and why it is so relevant today. We then looked at Joe's approach to Concurrency Oriented Programming and its main ingredients: share nothing, lightweight concurrency and pure message passing. We also compared this to the classic shared memory approach to concurrency. We then looked at other interesting aspects of Erlang, such as its functional nature (and why...more
In this episode we talk to Galen Hunt about the Singularity research OS. Galen is the head of Microsoft's OS Research Group and, together with a team of about 30 other researches, has built Singularity. We started our discussion by covering the basics of Singularity: why it was designed, what the goals of the project are as well as some of the architectural foundations of Singularity: software isolated processes, contract-based channels and manifest-based programs. In this context we also lo...more
In this episode, Michael and Markus talk about software components. We first looked at a couple of attempts at defining what a component is. We then provided our own definition that will be used in the rest of the episode. We then looked at the promises of component-based development: why are components useful? We then discussed some of the typical metadata components should specify to make them useful. We discussed to some extent typical variations in component models. The next topic was the...more
This episode is an interview with Dave Thomas (OTI Dave or Smalltalk Dave, not PragDave). We started our discussion with a look at the (non-)success of objects and components. We then discussed some history behine Eclipse and Dave's role in OTI. We then compared Smalltalk and Ruby and looked at the promises of small and powerful languages such as Lisp. We also discussed the role of (static) type systems and the role of tool support for languages. We then switched gears and looked at what is n...more
In this Episode we're talking about Web Services with IBM's Olaf Zimmermann. We mainly focus on the WS-* stack. We also discuss a couple of SOA foundations and architectural decisions that need to be taken when building an SOA using Web Serivces. We also briefly mention the REST vs. WS-* debate.
In this Episode we're talking with Dick Gabriel on Lisp. We started by looking at artificial intelligence as the historic context of Lisp, the goals AI tried to reach, and how Lisp was supposed to help reach those. We then discussed the language itself, starting with the Data As Program / Program As Data concept that is a foundation for Lisp. Then we discussed adding a meta-circular interpreter, programming as language development, and the blurred boundary between language and frameworks (be...more
In this episode we talk with Jeff DeLuca about Feature Driven Development (FDD). As one member of the agile methods family FDD is not so famous as Scrum or Extreme Programming but is becoming more and more popular, especially for situations where you have fixed price contracts. As the inventor of FDD Jeff gives short introduction to the method itself, talks about the basic ideas behind FDD and discusses with us how FDD relates to other members of the agile family.
In this episode Eberhard Wolff speaks with Jürgen Höller, the co-found of the Spring framework. Spring is a tremendously successful Java framework so they discuss the design of large frameworks and the issues that arise in the evolution. Jürgen explains the management of dependencies in the framework, how to structure such a framework, how to offer compatibility for the existing user base while evolving the framework and the role of metrics during development.
This episode is a conversation with Erich Gamma. We covered the four things he is known for in chronological order. We started with design patterns and the Gang-of-Four book of which he is the lead author. We then looked at JUnit, the testing framework he coauthored with Kent Beck and how it introduced unit testing to the masses. The next topic is obviously Eclipse, where Erich and his lab in Zürich is responsible for the Java Development Tooling. We also briefly discussed The Eclipse Way, the (...more
This episode is about OSGi, the dynamic module system for Java. Our guests are Peter Kriens (OSGI's Technical Director) and BJ Hargrave (OSGI's CTO). We'll discuss what OSGi is all about and why and in which contexts it is useful. Additionally we are having a look at the different layers of OSGI and where and how they are used. Other questions discussed are: What means dynamicity in an OSGI environment? Where is OSGI used? What’s the future of OSGI? How does OSGI interact with existing middlewar...more
In this Episode we're discussing patterns for small memory software with the authors of the like-named book Charles Weir and James Noble. We look at various aspects of the small memory problem: How can you manage memory use across a whole system? What can you do when you have run out of primary storage? How can you fit a quart of data into a pint pot of memory? How can you reduce the memory needed for your data? How do you allocate memory to store your data structures? Answers to all those quest...more
This is the second part of the discussion on fault tolerance with Bob Hanmer (if you didn't listen to Episode 77, which contains part one, please go back and listen now; this episode builds on that previous one!) We start by discussing a set of error detection patterns. Among are the well-known approaches such as checksums and voting. We then look at error recovery patterns, including restart, rollback or roll forward. The next section looks at error mitigation patterns, which include sheddi...more
In this Episode we discuss fault tolerance based on the new book by Bob Hanmer. This is the actually the first part of the discussion, the remainder will be published in the next episode of SE Radio. We start by discussing some of the context for fault tolerant systems and the imperfect world assumption. We then discuss a number of terms we will need when discussing the fault tolerance patterns. We then discuss the fault tolerance mindset and connect fault tolerance to a number of related su...more
In this special Episode we briefly discuss the upcoming Patterns Journal with the two editors, Ralph Johnson and James Noble.
In this special Episode we briefly discuss our new website. We will migrate to our new website during the coming week. If you experience any difficulties, contact the team or temporarily go to the old site at seradio.libsyn.com.
Enterprise Architecture is already common practice in most Fortune 100 companies. As the topic is comparably young, knowledge about it is not so widespread in the Software Architects Community, who deals mostly with project architectures. In this episode Alex speaks with Wolfgang Keller who has practical experience as an enterprise architect and has written a book on the topic. He is a Partner with BusinessGlue Consulting. They are specializing in the relationship between EAM and SOA. This episo...more
This episode is a conversation with Bruce Powel Douglass on real time systems. We started by discussing what real time software is, and explored the difference between hard and soft real time. We then looked at different scheduling strategies, and the meaning of terms like urgency and importance in the context of scheduling. Next was a discussion of typical architectural styles for real time systems and how architectures are described in this context. This led us to a discussion about the import...more
This episode is a discussion with Erik Meijer on LINQ. This is a relatively technical discussion about the following topics: what is LINQ, what are the common abstractions between the different data structures one can access with LINQ, what is the relationship to established languages for querying, how does the integration into the type system of the host language work, how to specify the mapping between the language level classes and the data, and how optimizations are implemented (lazy loading...more
In this Episode I talk about the results of the listener survey and reply to some of the suggestions and criticism expressed in survey replies.
In this episode we talk with Gerard Meszaros about problems and challenges doing unit testing in real-world projects. Starting from a short discussion about the importance of automated unit testing we spend most of this episode to talk about every day problems doing unit testing and how those problems can be solved. Based on this book on xunit testing patterns, Gerard talks about his experiences with unit test smells as an analogy to code smells. He describes an impressive set of unit testing pa...more
This Episode is part five in our (probably ongoing) series on service oriented architecture. In this episode we talk to Nico Josuttis, who has recently published a book on this topic. As its title "SOA in Practice" suggests, it is a very pragmatic book based on Nico's experience as architect and project lead in a number of enterprise-level projects - not all of them had been called SOA, since they at the time the term was not yet coined. The episode discusses some technical aspects of SOA (such ...more
This episode features a discussion with Dan Grossman about an essay paper he wrote for this year's OOPSLA conference. The paper is about an analogy between garbage collection and transactional memory. In addition to seeing the beauty of the analogy, the discussion also serves as a good introduction to transactional memory (which was mentioned in the Goetz/Holmes episode) and - to some extent - to garbage collection.
This is a roundtable discussion on model-driven software develoment and product line engineering. It was recorded at the Model-Driven Development and Product Lines: Synergies and Experience conference in October 2006 in Leipzig. The panelists are: Axel Uhl, SAP Danilo Beuche, Pure Systems Juha Pekka Tolvanen, MetaCase Tom Stahl, b+m Ruediger Schilling, Delta Software Technology
This episode features an interview with the software security expert Gary McGraw. Gary explains why this topic is so important and gives several security deficiencies examples that he found in the past. The second half of the interview is about his latest book 'Exploiting Online Games' where he explains how online games are hacked and why this is relevant to everybody, not only gamers in their 'First Life'.
This episode is an introduction to embedded system. It is an introduction in the sense that we cover many topics very briefly: upcoming episodes will provides details for many of these topics. We start by discussing what an embedded system is an what the important characteristics are. Among them is limited resources, concurrency, real time and hardware integration. We also discuss the range of embedded systems from small mirocontrollers to mobile phones to distributed real time embedded systems...more
In this episode we talk about the relationship between software architecture and the business. Based on his book, Beyond Software Architecture we discuss how things such as branding, licensing, updating or different deployment scenarios influence the technical architecture of a system. We also discuss issues such as portability that add a huge amount of complexity, although from a business perspective it often does not make much sense. In the second part of the interview we discuss how the techn...more
In this Episode we talked about the new POSA 4 book which has recently been published. We talk to two of the authors, Kevlin Henney and Frank Buschmann (the third author, Doug Schmidt was not available - and he had also been on the podcast a couple of times :-)). The book contains a pattern language for distributed systems. It contains 114 patterns that had been published before by many different other authors. The patterns have been rewritten to form a consistent language. We basically talked ...more
In this Episode we talk about the Scala language with its creator Martin Odersky. Scala is a language that fuses object oriented and functional programming. Martin started out by providing a two-minute overview over the language, and then talked a little bit about its history. We then discussed the basics of functional programming. The main part of the episode features a discussion of some of the important features of the Scala language: Case Classes and Pattern Matching Multiple Inheritan...more
This show takes a behind-the-scenes look at compilers and their inner workings, using the Gnu compiler collection (GCC) as an example. Arno interview Morgan Deters, covering all steps from the parsing of different programming languages to machine independenet optimizations and generating processor specific binary code.
This episode features Scrum, a very popular Agile software development framework. We interview Roman Pichler, a Certified ScrumMaster Trainer and independent consultant. Roman explains the principles behind Scrum, its roles and its key practices. He also answers FAQs. This episode continues our track on software development processes discussing an additional Agile method. Roman is currently writing a book on Scrum in German that provides more in-depth information of the topics discussed in the ...more
This episode is a discussion with Jonathan Aldrich (Assistant Professor at CMU) about static analysis. The discussion covered theory as well as practice and tools. We started with an explanation of what static analysis actually is, which kinds of errors it can find and how it is different from testing and reviews. The core challenge of such an analysis tool is to understand the semantics of the program and reduce its possible state space to make it analysable - in effect reconstructing the progr...more
Variability is one of the key concerns in software product line engineering. The episode introduces the concepts of structural and non-structural (or configurative) variability. It also discusses how to find and model variability, and especially how to implement variability in the solution artifacts. Michael and Markus discuss a series of variability mechanisms that can be used with today's programming languages and technologies.
This episode is about compile-time metaprogramming, and specifically, about implementing DSLs via compile-time metaprogramming. Our guest, Laurence Tratt, illustrates the idea with his (research) programming language called Converge. We started by talking about the importance of a custom syntax for DSL and took a brief look at the definition of DSLs by a chap called Paul Hudak. We then briefly covered the disctinction between internal and external DSLs. More to the point of this episode,...more
In this episode we discuss sensor networks with our guest Steffen Schaefer, who is the Technical Thought Leader for Sensors & Actuator Solutions at IBM. The discussion resolves around the TREC device, which can be mounted on containers to track them on their journey over seas, railway tracks and roads. The TREC is a small embedded device developed by Steffen's employer, IBM, that has various sensors and communications channels. In the episode we first talked about container transport in...more
In the first episode on Refactoring we talked about the basic ideas behind refactoring and some base principles why refactoring is a key part of software engineering. Now we move on to more complicated refactorings and discuss three major situations, their problems and possible solutions: advanced refactorings in large projects that can hardly be finished in a few minutes or hours and refactoring in larger teams. Also covered are the refactoring of published APIs and how merciless refactoring co...more
This episode is an interview with Frank Buschmann, one of the pioneers of the pattern movement in Europe. Michael and Frank discuss how it all began: the first conferences on patterns and the first publications by the Gang-of-Four and the POSA 1 team. Frank then elaborates on the new volumes in the Pattern-Oriented Software Architecture book series - POSA 4 and POSA 5 - and gives some examples from the books. The episode concludes with a general discussion on software design and architecture, an...more
Michael Kircher and Markus Voelter introduce the topic of software product line engineering. They motivate when and why product lines are important to consider and what makes them so special. Further, they introduce some key terminology, such as platform, core asset, feature model, commonality, and variability.
In this episode, we're talking to Obie Fernandez about agile DSL development in Ruby. We started our discussion by defining what a DSL is, the difference between internal and external DSLs as well as the importance of the flexibly syntax of the host language in order to make DSLs worthwhile. We then looked at a couple of real world examples for DSLs, specifically, at Business Natural Languages. We then progressed to the main part of the discussions, which centered around the features of Ruby tha...more
In this episode, Arno and Michael take a look at Design by Contract, a programming technique formalized by Bertrand Meyer. The idea is that an interface is more than method signatures - it is also about specifying the expected behavior that implementations must provide. While some languages include direct support for this style of programming, it is a useful mindset when desiging interfaces even without such language features.
This is another episode where we mainly announce topics related to the podcast itself.
In this Episode we talk about dynamic languages for statically-typed minds, or in other words: which are the interesting features people should learn when they go from a langauge such as Java or C# to a language like Python or Ruby. We used Ruby as the concrete example language. We started the discussion about important features with the concept of dynamically changing an object's type and the idea of message passing. We then looked at the concepts of blocks and closures. Next in line is a di...more
In this Episode we discuss software architecture evaluation with Dragos Manolescu, an architect at Microsoft's patterns & practices group. We start off the discussion by trying to define what software architecture evaluation is and when and you want to evaluate an architecture in the system's lifecycle. We then make sure evaluators set the expectations for the evaluation process right - it is important to understand that architecture evaluation is typically not primarily a review of the ...more
In this Episode we are happy to talk to Grady Booch. We started off by discussing his Architecture Handbook, how it came into being, the progress, and how it will look like once it's finished. In this context we also looked at the issue of how to distinguish architecture from design. We then asked him about how "professional" software architecture is these days, as well as about the ubiquity of software product lines in industry. The next couple of minutes looked at the question of whether soft...more
Changeable software has been a goal of several technique in software engineering. Probably the most important is Refactoring, changing the code without changing the behaviour (or at least without breaking the tests). In this episode Eberhard talks with Martin Lippert about this technique. The episode covers a history of refactoring, a definition of code smells and how to actually do refactorings in your everyday work. Also some advanced topics - like the ROI of Refactoring or Refactoring in dyna...more
This Episode is a round table discussion about Ultra-Large Scale Systems. In 2006, a number of authors (among them our guests Linda Northrop, Doug Schmidt, Kevin Sullivan, and Gregor Kiczales) have produced a report that addressed the following question: Given the issues with today's software engineering, how can we build the systems of the future that are likely to have billions of lines of code? In this episode, our guests discuss many of the issues that arise from this kind of system ...more
This is another episode on concurrency. We talk to two experts in the field, Brian Goetz and David Holmes about aspects of concurrency we hadn't really covered before. We start out by discussing liveness and safety and then continue to talk about synchronizers (latches, barriers, semaphores) as well as the importance of agreeing on protocols when developing concurrent applications. We then talked about thread confinement as a way of building thread-safe programs, as well as using functional ...more
This is the second part of our two part discussion of the eXtreme Programming development methodology. While the first part introduced the values, principles and basic practices, this time Arno and Alex speak about the practices that set the context for an XP project and how to get started, and they discuss some FAQs they often get when introducing XP.
In this episode, Gregor Hohpe gives us a great introduction to enterprise messaging based on his EAI Patterns book. Before we started discusssing the patterns in his book, we characterized messaging and talked about the various interaction styles. We also contrasted the messaging architectural style with an RPC based approach. We then took a look at the relationship to SOA, the role of contracts and the orchestration-vs-choreography discussion. We briefly discussed the nature of pattern language...more
This is the fourth and final episode on the fundamentals of Software Architecture. We talk mainly about architectural styles and patterns, as introduced in the POSA 1 Book. We also discuss a little bit the process of actually using those patterns for architecting systems.
This episode is an interview with Werner Vogels, the CTO of amazon.com. We first talked about what scalability is, and which aspects there are to scalability. We then took a brief look at the technologies used at amazon, specifically, the middleware systems and the issue of vendor lock-in. Web services, and the role of SOA was the next topic. Then we covered what a service actually is add Werner explained the term "pizza teams". Testing and Deployment was the next topic followed by a look at arc...more
This episode is an interview with Steve Vinoski. Steve works as the Chief Engineer for IONA. He's what you'd call a middleware guru, he was for example deeply involved with CORBA. So, this interview centers mainly around middleware. We begin by talking about his own history wrt. middleare and ORBs and how ORBs evolved over time. We then talked about whether coarse-grained, stateless components might be a better abstraction for distributed systems than "objects". We then covered the future of COR...more
Designers, programmers, engineers, we must all return to programming! Very few programmers tend to see their (sometimes rather general) difficulties as the core of the subject and as a result there is a widely held consensus as to what programming is really about. If these notes prove to be a source of recognition or to give you the appreciation that we have simply written down what you already know about the programmer's trade, some of our goals will have been reached.
This is the first of two episodes where Arno and Alex discuss eXtreme Programming in se-radio's development process track. eXtreme Programming (XP) revolutionized the way of thinking about software development methodologies and helped to make the agile movement popular. In this episode they discuss the very basics of XP, its value system, principles and the basic practices used in an XP project. The second episode will continue the introduction adding the missing practices and how to introduce X...more
This episode is an interview with Guy L. Steele Jr.. Guy is a Sun Fellow and heads the Programming Language Research Group within Sun, and a generally well known "programming language guy" (see here for details). We briefly talk about Lisp and the resurgence of dynamic languages before we delve into the main topic, the Fortress programming language he is working on. Fortress is a language intended to replace Fortran as a scientific computing language. We talk about how mathematical notations, sy...more
This episode mainly outlines the upcoming programming and interviews.
In this episode Markus and our Guest Andy Longshaw talk about enterprise architecture. More specifically, we talk about some of the patterns in Andy Longshaw's and Paul Dyson's book Architecting Enterprise Solutions: Patterns for High-Capability Internet-based Systems. These includes things like replication, load balancing, monitoring and application management.
This is the second snippet of the SOA 2 double-episode. Eberhard and Markus continue the discussion with the issue of service reuse and a couple of development process issues. We also look at the duality between infrastructure development and application development in the context of an SOA. We then discuss the great spaghetti misunderstanding :-). We conclude this episode with a look at how to integrate BPM into the conceptual SOA framework we've built up to now, and we'll also briefly skim ove...more
In this, as well as in the next episode Eberhard and Markus continue their discussion about SOA (the episode got too long, so we had to split it into two ... SOA 2a and SOA 2b). In this episode, we talk about the various perspectives on SOA (CBD, EAI, BPM), about fundamental requirements towards an SOA, and we discuss the role of models in defining sustainable architectures. We also discuss how a programming model based on the described approach typically looks like. We then discuss a number of ...more
In this episode, our guest Andreas Rueping and Markus talk about documenting software. While this is a topic that many people don't like or consider fun, it is nonetheless very important. Based on his book, Agile Documentation, we talk about various aspects documenting software such as what to document, when to document, which media to use as well as specifically a number of layouting tips for nice documents.
In this third Episode on software architecture, Michael and Markus talk about the basic tools that an architect uses when architecting systems. These tools include things like separation, abstraction, compression and sharing. We also relate these tools to the quality attributes we introduced in previous archtecture episodes.
The third part of our concurrency series by Michael and Alexander discusses how to build highly scalable servers. The discussion focusses especially on event-driven servers. As possible solution patterns a reactor-based design is suggested along-side several patterns for multi-threading issues: Reader/Writers Locks, Thread Pools, and Leader/Followers.
In recent episodes we have discusses statically and dynamically typed languages and domain specific languages - topics that are much talked about in the community at the moment. In this episode we look at the foundation of programming languages : types. We explain what a type actually is, how type systems work and what polymorphism works.
SOA (Service Oriented Architecture) appears to be just another hype - after all we have been building distributed systems for quite a while now. But the real value of SOA is non-technical. In this episode Eberhard and Markus discuss the advantages and disadvantages, what SOA actually is and how it compares to other approaches that have been tried out before.
In this Episode, Arno, Bernd and Markus interview Jutta Eckstein. Jutta is a pioneer and expert on using Agile software development, specifically in larger teams. In the interview we talk about the agile manifesto, the role of personal relationships and trust in software projects, differences between agility in the small and in the large, as well as offshoring.
In this Episode, Michael and Markus continue the discussion about the fundamentals of software architecture (we're doing it without Alex, because it is really hard to find a suitable time for all of us on the phone :-)). We talk about the various quality attributes (such as performance, scalability, maintainability and many more) and how they relate to each other.
In this episode Arno and Alex talk about the basics of software development processes. They discuss why and when software development processes are needed and also why some developers don't like them. They discuss the theories behind different processes and talk about defined vs empiric processes in general. This episode is the first in a row that will later on describe specific processes like eXtreme programming or the unified process.
This is the first of a series of Episodes on Software Architecture. Alex, Michael and Markus talk about rather fundamental topics in this episode, we'll go into much more detail in subsequent episodes in that series. Topics in this episode include: What is architecture, how is it different from design what different kinds of architecture are there in addition to software architecture the role of the architect, do we have one or more? architecture in agile software development tasks o...more
This is an episode with some more of your feedback. Specifically, the episode also contains a 5 minute section from Geert Bevin where he explains how Continuations are used an implemented in the Rife Framework. This is in response to a discussion about continuations and Rife in Episode 15, Future of Enterprise Java. We also have some feedback from Bill Pugh about flaws in our description about the problems of double-checked locking in Java.
In this Episode, Arno and Michael take a closer look at Exceptions and Error conditions, how to categorize them and how to deal with them. We look at the different levels of guarantee that a piece of code can provide with regard to exceptional condition and finish with a discussion of a number of best practices and their respective trade-offs.
In this Episode, we talk to Michael Stal, a Senior Principal Engineer at Siemens Corporate Technology, POSA 1 and 2 Co-Author and Editor of the german JavaSpetrum magazine. Since Michael's core focus is middlware, much of our discussion centered around that topic. Webservices and SOA, of course, have also been covered. Other topics include Java vs. .NET as well as Patterns.
In this second part of our concurrency series Michael and Alexander talk about basic patterns for concurrent programming, such as Active and Monitor Object, Scoped Locking and Futures. Further, they discuss some architectural considerations regarding the number of threads and resource usage in general. For more information, see the references for part one as well as the following links
In this episode Michael and our guest Prashant Jain talk about patterns for resource management. Efficient management of resources is critical in the execution of any kind of software. Ranging from embedded software in a mobile device to software in a large enterprise server, it is important that the resources, such as memory, threads, file handles, or network connections, are managed efficiently to allow the systems to function properly and effectively. Michael and Prashant discuss various patt...more
This is a short episode that outlines the upcoming episodes and interviews, as well as reports on some listener feedback.
This episode provides a hands-on guided tour through a simple model-driven software project. It is based on an actual code sample (see link below) and takes a look at the typical steps of real-life code generation: prototypical implementation, defining the metamodel, reading a model into a metamodel instance, writing templates and validating the model. The example for the episode uses openArchitectureWare as a generator environment, but the overall approach is tool independent. This episode is t...more
A very important area for Java are Enterprise Systems. With the advent of new technologies like Ruby on Rails, Java EE 5 or EJB 3 the landscape for Enterprise Systems appears to be changing a lot at the moment. In this episode Markus talks with Eberhard about what Enterprise Java actually is, why and where it is used. Based on that they discuss what the future might look like and how to make Enterprise Java shine in the future.
In this Episode we talk to Ted Neward. Since Ted is active in the .NET and Java universes, we started out by discussing some of the differences between the two platforms. The main discussion, however, focussed on new features in the C# 3.0 language. These include LINQ (language-integrated query). A very interesting discussion about extension methods, lamda expression, typing (dynamic, duck, compiler) and other language "tricks" follows. We also visited the topic of language development on the .N...more
Ruby has been getting more and more attention by the developer community over the last couple of years. Nevertheless Ruby as language and as a plattform is not too widespread. Most developers don't know people who have actually done commercial Ruby projects. Therefore it is sometimes hard to judge if Ruby is just a hype topic or if Ruby can be used for serious projects today. In this episode Alexander speaks with Thomas Quas about a commercial Ruby project Thomas finished a while ago. Thomas sha...more
This is the first part of a series of Concurrency episodes. In this part Alex and Michael motivate and introduce the topic. We explain fundamental terms, such as thread, process, or mutex and dicuss typical challenges, such as deadlocks and race conditions.
In this Episode we have the pleasure of talking with Gregor Kiczales. Gregor is one of the fathers of aspect-oriented programming (AOP). Today he is a professor of computer science at the University of British Columbia. Back in his days at Xerox Parc, he and a number of other people worked on the early forms of AOP as well as on some of its forerunners, such as meta object protocols. In this interview, we talk about a number of interesting topics, such as the history of AOP, the relationship of ...more
This is the second part of the remoting infrastructures discussion started in Episode 9. We take a look at how remoting infrastructures such as CORBA, .NET Remoting or Web Services work internally. This includes the low level details of the transport layer, marshalling, client proxies as well as interceptors and asynchronous communication. At the end, Michael will explain how all this relates to CORBA and Markus will map the concepts to .NET remoting. We don't have additional links in these show...more
This Episode as well as the next one take a look at remoting infrastructures such as CORBA, .NET Remoting or Webservices. In this first part we will take a look at why remote communication is necessary in the first place, what remoting middleware can do for you as well as which other middleware technologies exist in addition to OO-RPC systems, such as messaging middleware. Finally, we conclude with a brief overview of what the broker pattern can do for us in the context of remoting middleware.
Eric Evans is the author of the well known Domain-Driven Design book. In his day job he works as a consultant and coach for his own company, Domain Language. In this interview, Eric talks about the essential building blocks of domain-driven design as well as about a set of best practices on how to address complex projects. In a third part, he elaborates on the relationship of domain-driven design and MDSD/MDA.
This week, Arno and Markus take a look at error handling at the architectural level. They discuss the different kinds of errors, the groups of people who need to know about them and proven high-level approaches. Later episodes will investigate more technical aspects of error handling, such as idioms for using exceptions or a discussion of checked vs. unchecked exceptions.
After discussing some of the more technical aspects of MDSD in the last episode, we take a look at other important topics in this one. This includes some tips on how to introduce MDSD into projects and how the development process has to be adapted for this to work, as well as a look at the return on investment for MDSD. The relationship of MDSD and Agile software development is also discussed. Finally, we take a look at offshoring in the context of MDSD.
In this Episode, Eberhard and Markus provide an introduction to Model-Driven Software Development. Since the discussion turned out to be too long, we separated things into two episodes, thus Episode 6 will be the second part of this discussion. In this first part we disucsss core concepts of MDSD, the relationship to MDA, and hint at a couple of tools.
In this Episode, Alexander and Markus talk about scripting languages. Topics include the definition of what a scripting language is, typical usage scenarios, performance issues, programming styles and IDE support. In later Episodes we will talk about more specific topics, such as dynamic typing, reflection, functional programming as well as specific languages such as Ruby.
In this episode we talk with Doug Schmidt. Doug is a professor of computer science at Vanderbilt University and a well-respected authority in the fields of middleware, patterns and model-driven development. In this interview we talk about these topics in the context of distributed, realtime embedded (DRE) systems.
Eberhard and Markus discuss the important topic of associations and dependencies in this show. While OO languages provide direct support for subtyping, most don't provide a first-class construct for other relationships between objects. The discussion elaborates on the problem and looks at various remedies, most importantly, dependency injection.
In this episode Michael and Markus talk about patterns. Starting with some of their "most used" patterns, they go into some detail about the history of patterns. They then discuss the various pattern forms as well as some misconceptions about patterns. Other topics include the domains that are covered by patterns as well as pattern languages.
This is the first episode (actually, episode zero) of software engineering radio. The episode does not contain real content, rather, Markus explains what the podcast is all about.