The eXo Platform team has released eXo JCR (Java Content Repository) 1.8, a JSR-170-compliant Java content repository implementation. The eXo JCR website describes the Java content repository specification in this way:
The main changes in the 1.8 release of eXo JCR include:
The complete list of changes in eXo JCR 1.8 is available on the issue tracking site.
The main purpose of standardized Java Content Repository is to provide standardized, reliable intermediary layer between custom applications and data storage. The documents could be stored in a relational database or in a native XML DB but your client code would not change.In a prior article about integrating JCR implementations with Spring, InfoQ had this to say about JSR-170:
Sitting on top of the data storage, JCR offers content services like granular access control, versioning, content events, full-text search and filtering among others. With an impressive expert group behind JSR-170 led by Day Software, including Content Management Systems (CMS) vendors like Vignette, Hummingbird Ltd., Stellent and the usual Java-driven solution providers like BEA Systems, IBM and Oracle, the specification is likely to become the de-facto standard for content management and document storage.The referenced InfoQ article discusses a number of implementations of the JCR spec including eXo JCR as well as Apache Jackrabbit, which is the reference implementation of the JSR-170 specification. Since the original writing of the article, both Jackrabbit and eXo JCR have experienced a number of releases and enhancements.
The main changes in the 1.8 release of eXo JCR include:
- Backup service with full and incremental modes
- Improved replication, decoupled from JCR core
- JCR WebDAV service is optimized for big files
- JCR CIFS improvements with real NTLM (1,2) authentication, locks and notification support
- Owner inheritance support
- Several fixes for JCR core, import/export and versioning related improvements
- Performance improvements, particuarly related to MySQL
The complete list of changes in eXo JCR 1.8 is available on the issue tracking site.
