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In this presentation from QCon San Francisco 2007, Charles Nutter discusses the Ruby and JRuby featureset, the JRuby compiler, calling Java from JRuby and vice versa, programming Swing with JRuby, JRuby web applications, JRuby on Rails, persistence, build automation, Test-Driven Development and Behaviour-Driven Development.
There is a widespread opinion that a good DSL has to be English-like. Dave Thomas advocates against such approach asserting that DSL are not about getting as close as possible to natural languages and that having this as a guiding principle of DSL design can be rather detrimental. He also highlights what he believes is important in DSL design and provides some examples of successful DSL.
Bob Martin believes that Active Record pattern that maps data structures to objects may be a source of confusion. Even though it appears to be an object, it actually is a data structure, vulnerable to the addition of new types. To preserve the flexibility, Bob Martin suggests separating Active Record from the application, so that the latter can be designed and structured solely around objects.
Rob Conery from the SubSonic project recently introduced migrations, which allow .NET developers to create database schema using code, much like the way Ruby on Rails provides database schema management in code.
The ActiveHibernate project brings Hibernate features to JRuby - for those tricky ORM use cases that go beyond what ActiveRecord offers. We talked to project maintainer Johan Andries.
The maintainer of ActiveMessaging for Ruby on Rails gives a comprehensive and informative introduction to his open-source framework, which enables enterprise messaging technologies to be easily integrated with Ruby on Rails applications, and is getting support from noted industry leaders such as James Strachan and Jon Tirsen.
ActiveRecord fails the DRY principle, especially if your database doesn't follow Rails naming conventions. As well, ActiveRecord associations and validations are redundant specifications of database constraints. Bryan wants to avoid (as much as possible) the situation where he's averse to making changes to his database schema, because of the resulting effort to change his app code.
A 5-year old, Dallas-based company named Spur is gaining attention and kudos within Ruby on Rails circles. Earlier this week it announced a new release of its popular GPL'd IT support tool named SimpleTicket. Managing Partner Alexander Muse was kind enough to share the story of SimpleTicket with InfoQ.
JRuby project lead Charles Nutter discusses how he got involved with JRuby, Sun's involvement with JRuby, how JRuby fits into enterprise-level web applications, the possibility of a friendly fork of the OpenJDK source code, reasons for switching to JRuby, the future of JRuby, Spring and JRuby, and the Ruby community as a whole.
