InfoQ Homepage Architecture Content on InfoQ
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Agile Contracts
The traditional Waterfall model fits nicely with the way companies buy things: requirements are drawn up, a supplier quotes a price, and everyone signs a legally binding agreement. Contracts written this way seldom offer the freedom to work using an Agile approach. This article examines four separate models available to suppliers and customers for establishing contracts for Agile work.
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Xtext/TS - a Typesystem Framework for Xtext
Since the release of version 1.0, it has become feasible to build complex expression languages in Xtext. However, once you have expressions, you typically also need a type system. In this article Markus Völter describes a framework for specifying type systems for expression languages built using Xtext.
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Book Excerpt and Interview: 100 SOA Questions Asked and Answered
A new "100 SOA Questions Asked and Answered " book by Kerrie Holley and Ali Arsanjani provides a deep insight into SOA covering a wide spectrum of topics from SOA basics to its business and organizational impact, to SOA methods and architecture to SOA future. InfoQ spoke with Kerrie Holley and Ali Arsanjani about their book.
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Using Apache Avro
Boris Lublinsky presents an introduction to AVRO and evaluate its usage for Schema componentization, inheritance and polymorphism. He also discusses backward compatibility issues and AVRO solutions for this problem.
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Asynchronous, Event-Driven Web Servers for the JVM: Deft and Loft
Asynchronous, event-driven architectures have been gaining a lot of attention lately, mostly with respect to JavaScript and Node.js. Deft and Loft are two solutions that bring "asynchronous purity" to the JVM.
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Virtual Panel: How to Survive Asynchronous Programming in JavaScript
Using callback-passing for asynchronous actions does not compose very well and might create complex flows of passing callbacks around to handle return values. The JavaScript community is aware of this and has come up with several libraries to deal with it. In this virtual panel, InfoQ has interviewed the creators of the most popular of these libraries.
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IT And Architecture: Inside-Out Perspectives
The software industry is in disarray, costs are escalating, and quality is diminishing. Promises of newer technologies and processes and methodologies in IT are still far from materializing on any significant scale. Bruce Laidlaw and Michael Poulin - each with more than 30 years of experience compared notes on the past and present of IT and provide insights on what IT needs to make progress.
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Hades - JPA Repositories Done Right
Almost every application has to access data to do its work. In a domain driven design approach one defines repositories for the entities that make up the domain. Java developers often use JPA to implement these repositories. Hades is an open source library that's built on top of JPA and Spring to significantly improve the implementation of data access layers by reducing the effort required.
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No Callbacks Required: StratifiedJS Returns Sequential Programming to Javascript
StratifiedJS is a superset of Javascript that adds concurrency constructs and makes callback hell a thing of the past. How? InfoQ talked to Alexander Fritze, of Onilabs, to find out.
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An Introduction to SpringSource's Advanced Message Queuing Protocol Support
This article looks at the problems AMQP is aiming to address, exploring some of the debate and controversy that the draft specification has generated. We talk to SpringSource's Mark Pollack and Mark Fisher, to find out more about their AMQP-based products, and iMatix's Pieter Hintjens about his work on the specification and his concerns around the direction it has taken.
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Agile at the Office of Personnel Management
In its attempts to modernize retirement claims processing the Office of Personnel Management had several versions of this project cancelled. The most recent of which used "requirements, design, implement, and test cycles to develop the system. During the testing phases, serious issues became evident". In trying again the director said that they weren't going to repeat the mistakes of the past.
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Key Takeaway Points and Lessons Learned from QCon San Francisco 2010
This article presents the main takeway points as seen by the many attendees who blogged about QCon. Comments are organized by tracks and sessions: Keynotes, Tutorials, Architectures You've Always Wondered About, Java, the Platform, Real Life Cloud Architectures, Agile Evolution, Design at Scale, Dev and Ops: A Single Team, NoSQL, SOA for the REST of Us, and many more!