eXo JCR 1.11.2: overview

eXo JCR 1.11.2 is out - What are inside.

This is a new version of our JCR 1.x product line.
It will be a "database" for a next version of eXo Portal.

eXo JBoss JCR project will be based on this release codebase also.

With many features listed below eXo JCR is ready to content-oriented-architecture. Check them here in short or visit eXo JCR wiki for a full list of capabilities.

Try eXo JCR in action via bundled samples - read after the features.

Main features

eXo JCR it’s an implementation of Java Content Repository API (JSR-170). Java Content Repository provides common programmatic interface to stores of hierarchical and unstructured data, content versioning, locking, observation, search (including full-text search), content export/import and many more.

In addition to JSR-170 features we provide Extension Actions API which allow use of programmatic actions triggering on content update or access. Actions can be configured via filters.

Plus you can find set of useful Extensions out of the box:

• Registry service
• Replication (Synchronous and Asynchronous)
• Organization service
• Backup service and HTTP backup agent
• Access-control actions
• Metadata actions
• Node Representation service
• Groovy REST-services
• Audit service
• Session providers
• Node Types registration
• Namespace altering
• Repository and Workspace management

eXo JCR supports RMI, WebDAV and FTP network access to a repository.

Repository implementation uses database as a persistent storage for a content. We support Oracle, DB2, MySQL, PostgreSQL, MSSQL, Ingres, Derby and HSQLDB backends.

It’s possible to store content using External Value storage. Our implementation comes with several file-system storages. External Value storage API allows develop custom storages e.g. for store data on type or in customer databases.

Additionally we’re supporting Amazon Web Services as a backend:

• S3 External Value Storage (stores only Values on S3)
• SimpleDB Workspace storage (Beta status)

Samples

To see the JCR in action download eXo JCR Tomcat bundle, extract it in empty folder and run eXo.bat (eXo.sh for Unixes) fron bin folder. Bundle contains full JCR with dependencies - it's ready base for eXo & JCR development.
There are two very simple visual applications: JCR browser and JCR FCKeditor. After the Tomcat started open the url: http://localhost:8080/browser

Sample bundles comes with enabled WebDAV and FTP JCR servers also. So you can surf Repository from external, e.g. via Windows Web-folders or any FTP-client (port 2121).

Open WebDAV view http://localhost:8080/rest/jcr/repository/production/ (for Windows Web-folders open vie InternetExplorer: Ctrl+O, enter the view url and enable "Open as Web-folder").

We provide Samples as EAR also. Deploy procedure described in the readme.txt of the bundle. EAR contains full JCR with dependencies and same samples as Tomcat bundle.

RMI bundle contains RMI Server and sample client binaries, it's useful example to start JCR-RMI coding.

All eXo JCR Samples runs in StandaloneContainer, so it's ready to embedding to another applications or can be used as standalone application (web or via main class).

eXo JCR can be used in PortalContainer also, eXo Portal uses it in that way.


Main changes of eXo JCR 1.11.2

• JCR Core Binary Values improved processing: use of input stream with only on-demand spooling of big Binary Values.
• Asynchronous and Synchronous replication Binary Values processing improved: changes storage for replication use less amount of files
• Lot of Asynchronous replication improvements: merger, subscriber lifecycle, connection and local storage consistency etc.
• Synchronous Replication Proxy mode simple configuration. Proxy Replication allows several running servers on the same physical host (useful for development).
• Support of Values large of 2GiB in External Value Storage.
• JCR Core Node.gatProperties() bugfix of duplicate Properties returned for unsaved Node when changes occurs in another Session.
• Lot of minor Backup Service bugs fixed. Asynchronous restore support added.
• HTTP Backup agent improvements of API.
• WeBDAV codestyle refactoring and bugfixes of PROPPATCH and DELETE calls
• Version history Import/Export utility bugfix of Items import.

Find more about eXo JCR on wiki.

Ask about JCR on the Community forum.

Download eXo JCR 1.11.2 from OW2 Forge page.

Sources repository here.