Domain-Driven Design, DDD, is all about the domain, not about persistence. With a history of database programming for 25 years, later years using Entity Framework, Julie Lerman, a consultant on the .NET platform and a Microsoft MVP, in a recent presentation at the Øredev developer conference shares her persistence experiences when moving into DDD.
VMware has today announced VMware vFabric Suite 5.1, adding automated deployment, enterprise open source support, and PostgreSQL capabilities, as well as an expansion to the SQLFire in-memory database.
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.
VMware releases SQLFire 1.0 a distributed SQL database geared towards high availability and horizontal scalability which offers table replication, table partitioning and parallel execution of queries.
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.
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.
Entity Framework Feature CTP 4 recently released updates the Code First programming model with new code conventions and data annotations, and adds two new types, DbContext and DbSet
NorthScale solutions announced the availability of the open source NoSQL database Membase which was developed by core members of the Memcached team with contributions from Zynga and NHN. It is a protocol compatible persistent drop in for Memcached the widely used caching solution
The HyperSQL database (HSQLDB), version 2.0, has been released after 5 years in the making. HyperSQL 2.0 is the worthy successor to HSQLDB 1.8, which has been integrated and used in applications large and small, including the ubiquitous OpenOffice Base application. The new version boasts more features than any other open source database.
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.
The data persistence solutions in software development have come a long way in the recent years. At the recent Lone Star Software Symposium, Scott Leberknight talked about "Polyglot Persistence" trend where the developers have a choice of different database products like Amazon SimpleDB, Google Bigtable, and CouchDB to choose the data persistence solution.
ODBMS.ORG has added persistence patterns to its collection of resources for educators, students, professionals, and open source practitioners. Three pattern collections comprise the initial offering in this area. A Best Persistence Pattern Award, is planned for any pattern submitted prior to May 29, 2009.
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.
Brett Taylor, founder of FriendFeed, describes how they overcame some limitations of MySQL to handle problems of scaling and database evolution by implementing a "schema-less" storage system on top of MySQL.
JPA extension features like Fetch Groups offered by Apache OpenJPA framework can give enterprise Java developers more flexibility in designing JPA applications. Pratik Patel discussed JPA design techniques for developing real-world Java applications using JPA API and Spring 2.5 framework. He did a presentation at the recent Central Ohio Software Symposium on Enterprise JPA.