Developer Ricardo Peres of Portugal has published a seemingly unbiased comparison of the leading .NET ORMs: NHibernate and Entity Framework. While we recommend anyone considering both to read his article, Differences Between NHibernate and Entity Framework, we are going to tough on some of the key differences.
Version 3.5 of the ORM tool LLBLGen Pro was released this week, and includes updates to Entity Framework and NHibernate functionality, designer improvements, and several updates to the runtime, such as support for OData and SQL Server 2012.
JBoss relases Hibernate 4.1 with improvements to the Envers module that allow for finding the database revision responsible for a change in a specific audited property.
JBoss Releases Hibernate 4.0 which comes with Multi-tenancy support, the introduction of a standard mechanism for writing Hibernate extensions, initial refactorings towards OSGI and several other cleanups.
S#arp Lite is an effort to make S#arp Architecture more accessible to all developers; this scaled-back version includes a project template set up to connect to a database via NHibernate, a set of reusable class libraries, a base repository, and a sample project.
Emmanuel Bernard, the developer behind Hibernate Validator, Hibernate Search, among others, recently announced the birth of Hibernate OGM. The new framework's goal is to provide a common interface for NoSQL datastores using JPA constructs. InfoQ spoke to Bernard to find out more about the framework.
NHibernate 3.0 is the first major release of the popular ORM in over a year. With the release it has changed the CLR version to .NET 3.5. This allows the creation of the QueryOver API, while replaces the string-based ICriteria expressions with strongly typed lambda expressions. This is in addition to the built-in LINQ provider.
The latest NHibernate developments include: the release of NHibernate 3.0.0 Alpha 1, NHibernate Profiler supporting NHibernate 3.0, and HQL Language Service for Visual Studio.
LLBLGen Pro is an ORM tool which supports multiple persistence frameworks: LLBLGen Pro Runtime, Entity Framework, NHibernate and LINQ to SQL. Other new features are: support for .NET 4.0, model-first or database-first development mode, model view, project validation.
Recently, a post by Oren Eini (a.k.a. Ayende Raheim) touched off a debate around the respective merits and capabilities of NHibernate and Entity Framework 4.0, two .NET-based Object/Relational Maping frameworks. InfoQ explored this debate in more detail to understand some of the perspectives which were given.
Sadly the terms “ORM” and “performance problems” often travel together. By hiding the underlying SQL from the developers, ORMs can offer a huge productivity boost. Unfortunately they also make it easy to generate ridiculously bad queries without realizing it. And without stored procedures to cross reference, finding the offending code without an ORM-specific profiler can be quite tricky.
James Gregory, the owner of the Fluent NHibernate project, has announced his project has reached the 1.0 milestone and it is currently a Release Candidate.
NHibernate Linq 1.0 has been released. Based on the stable provider from NHibernate Contrib, NHibernate Linq 1.0 is a LINQ provider that supports most operations available through the NHibernate criteria query API.
Eric Nelson, a Developer Evangelist for Microsoft and Technical Editor of MSDN UK Flash, has compiled a list of 23 .NET open source projects mostly based on recommendations sent by UK developers. Other great projects did not make it into the list, while Microsoft’s contribution include: ASP.NET MVC, DLR, IronRuby, IronPython, MEF.
Often times when transferring persistent entities outside of the JVM you must strip off persistence related information or modifications. Gilead, formerly Hibernate4GWT, aims to ease that process and handle the heavy lifting.