InfoQ Homepage ORM Content on InfoQ
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NHibernate 2.0 Offers Many New Features
NHibernate 2.0 Alpha has been released this week. The current 2.0 release is the first step to the feature set of Hibernate 3.2.6, many classes have been completely rewritten and lots of features have been added.
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Panel: Java Object Persistence: State of the Union
In this panel, the editors of InfoQ.com (Floyd Marinescu) and ODBMS.org (Roberto V. Zicari) asked a group of leading persistence solution architects their views on the current state of the union in persistence in the Java community.
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Continuous Integration And Version Control for Databases
After asserting that one must, as a rule, always version their database work, Scott Allen detailed an approach to making the best of versioning databases. Allen presented a comprehensive, practical approach to creating a baseline, using change scripts to manage schematic revisions, controlling programmatic database objects, and handling branching and merging.
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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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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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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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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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O/R Mapping, Caching, and Performance
One of the common misconceptions about Object/Relational Mapping (O/R Mapping) frameworks is that they give developers caching for free and that caching improves performance. While O/R Mapping frameworks do rely on caching, improved performance isn't in the cards.
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InfoQ Article: DrySQL ORM for Rails
In this exclusive article, Bryan Evans of the DrySQL project explains how to avoid situations where you're averse to changing your database schema, because of the resulting effort to change your app code.
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ADO.NET vNext: Entity Data Model Designer Prototype Available
The ADO.NET team has released a demo of their Entity Data Model Designer. This tool demonstrates some of the Object-Relational Mapping (ORM) features planned for ADO.NET vNext.