InfoQ Homepage ORM Content on InfoQ
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Article: Take care of your domain model
Today, many projects focus on Domain-Driven Design, but it is not always easy. One of the most important things are to separate the domain code from the code that only exists for technical reasons. Mats Helander has written an article where he explains how to manage domain models and teaches design patterns and aspect-oriented programming in the process.
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Preserving flexibility while using Active Record pattern
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.
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SubSonic Does Migrations
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.
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Has JPA Killed the DAO?
Recent developer discussion has explored whether JPA has killed the DAO pattern. DAO supporters argue that it isn't going anywhere soon however.
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Catching up with the Castle Project
The Castle Project is an open source project that runs on .NET, providing an MVC (Model-View-Controller) framework similar to the popular Ruby on Rails. The Castle Project has been in development since 2003 and released Version 1.0 RC2, in November of 2006. As the project nears its V1.0 RC3 we caught up with Hamilton Verissimo, the founder of the project.
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OpenJPA 1.0: Enterprise O/R Mapping with full JPA 1.0 compliance
Apache OpenJPA, an open-source implementation of the Java Persistence API (JPA), recently released version 1.0.0. InfoQ spoke with OpenJPA project lead Patrick Linskey to learn more about this release.
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JLINQ: Runtime JDBC Generator for Eclipse
Azadeh Ahadian of IBM has published an article introducing JLINQ on IBM's developerWorks site. Despite the name, JLINQ does not have much in common with Microsoft's LINQ, rather it is an Eclipse plugin providing integration with a database and runtime DAO code generation. The plugin is part of IBM's Developer Workbench that is coming with Viper, the next release of DB2.
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LLBLGen Updates O/R Mapper and Code Generator
Solutions Design has recently released LLBLGen Pro v2.5, an O/R mapper and code generator that boasts many new features including auditing, authorization, dependency injection mechanism, super fast and compact serialization (XML and binary), SQLServer CE Desktop support, Sybase support and much more.
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Apache Geronimo 2.0: Certified Java EE 5 compatible
Apache Geronimo, an open-source Java Enterprise Edition (Java EE) application server, recently released version 2.0.1. InfoQ took the opportunity to learn more about Apache Geronimo and where it fits into the application server space.
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Interview: OpenJPA & the JPA spec with Patrick Linskey
OpenJPA is an implementation of the Java Persistence API (JPA) which can be used as a stand-alone POJO persistence layer, or it can be integrated into any EJB3.0 compliant container and many lightweight frameworks. In this interview, Patrick Linskey explains where OpenJPA came from, how it fits into the O/R Mapping space, the JPA specification, and future plans for OpenJPA.
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ORM with JRuby - ActiveHibernate
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.
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Eclipse Web Tools Platform 2.0: Now with JPA and JSF tools
As part of the Eclipse 3.3 (Europa) release two months ago, Version 2.0 of the Eclipse Web Tools Platform (WTP) was released. InfoQ spoke with WTP co-lead Jess Garms to learn more about this release and about WTP in general.
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Article: Using ETags to Reduce Bandwith & Workload with Spring & Hibernate
Gavin Terrill explores one of the lessor known facilities available to web developers, the humble "ETag Response Header", and how to integrate its use in a Spring and Hibernate based web app to improve application performance and scalability.
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OpenJPA adopted by both IBM and BEA; becomes top-level Apache project
Apache OpenJPA has been gaining momentum in the JEE world, having been adopted by BEA as the EJB3 JPA implementation in WebLogic Server 10 and in the most recent EJB3 Feature Pack for IBM WebSphere Application Server. OpenJPA started its life in BEA's Kodo product, whose code was donated to the ASF in 2006; the project just recently graduated from the Apache Incubator as well.
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Hibernate Search: Indexed Full Text Search of your Domain Model
The second beta of the new Hibernate Search project was recently released. InfoQ spoke to project lead Emmanuel Bernard to find out more. The Hibernate Search project is aimed at users of Hibernate or JPA that want to make their Hibernate/JPA-managed objects accessible via indexed, full-text search.