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Concurrency Controls in Data Replication

Learn about leading concurrency control mechanisms used for data replication in distributed environments, comparing synchronous and asynchronous implementations with/without locking - techniques used by Oracle RAC, TimesTen, and GigaSpaces and NoSQL databases. Explore tradeoffs among performance, consistency, deadlocks, and conflicting updates in the context of a sample distributed application.

Yongjun Jiao
on Mar 01, 2011
Concrete: Rich, Customizable DSL Editors for the Browser

Text-based DSLs are useful, an custom editor for the DSL is even better. Concrete allows to build customized editors for JSON-based DSLs/Models. InfoQ talks to Concrete's creator Martin Thiede.

Werner Schuster
on Feb 24, 2011
Brian Chess on Static Code Analysis

Building security into software applications from the initial phases of development process is critical. Static code analysis gives developers the ability to review their code without actually executing it to uncover potential security vulnerabilities. InfoQ spoke with Brian Chess about static analysis and how it compares with other security assessment techniques like penetration testing.

Srini Penchikala
on Feb 21, 2011
Matt Tesauro on OWASP Web Testing Environment (WTE) Project

Web Testing Environment (WTE) project, a part of The Open Web Application Security Project (OWASP) organization, makes application security tools available to application developers and QA testers. InfoQ caught up with WTE project lead Matt Tesauro to learn more about the background, current state, various tools it supports and the future road map of the project.

Srini Penchikala
on Feb 14, 2011
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.

Allan Kelly
on Feb 08, 2011
Development

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.

Markus Voelter
on Feb 07, 2011
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.

Boris Lublinsky
on Feb 02, 2011
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.

Boris Lublinsky
on Jan 25, 2011
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.

Dio Synodinos
on Jan 24, 2011
Web Development

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.

Dio Synodinos Werner Schuster
on Jan 09, 2011
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.

Bruce Laidlaw Michael Poulin
on Jan 03, 2011
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.

Oliver Drotbohm
on Dec 20, 2010

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