ModeShape

An open-source, federated content repository

Announcing JBoss DNA 0.7

We’ve just released JBoss DNA 0.7. It’s in the JBoss Maven repository and in our project’s downloads area. Of course, our Getting Started guide and Reference Guide are great places to see. And we always have JavaDocs.

With this release, JBoss DNA introduces support for JCR query and search with a several languages, including the JCR XPath language (required by the 1.0 specification), the JCR-SQL2 dialect defined by the JCR 2.0 specification, and a full-text search language. It also adds support for observation.

This means that JBoss DNA now implements all of the JCR Level 1 features, almost all Level 2 features (everything except referential integrity), and the optional locking and observation features. This version passes more than 97% of the JCR TCK tests that cover Level 1, Level 2, locking and observation. (All of the failures are because of referential integrity and a handful of known issues.) Fortunately, most of these are either less-frequently-used features of JCR or issues that can be worked around.

This release also introduces a number of new and improved connectors. Both the file system connector and SVN connector were reworked to improve performance and to support updates, and they both offer a preview of an optional caching system. The JPA storage connector was dramatically improved and is now significantly faster, more capable, and more efficient. There is also a new JDBC metadata connector that provides read-only access to the schema information of relational databases through JDBC. The federated connector was also improved, and is now used in several key places within our JCR implementation. Plus, we still have connectors to Infinispan, JBoss Cache, and a simple transient in-memory store.

There are also a number of new and improved sequencers. A new text sequencer is able to extract structured data from comma-separated or fixed-width text files. A new DDL sequencer is capable of parsing a number of DDL dialects to extract the more important DDL statements. The CND sequencer was rewritten to be much simpler, perform better, fix a number of known issues, and eliminate third-party dependencies. There is also a new Java class file sequencer that operates on Java class files and produces output that is comparable to the Java source file sequencer, and that can be used in conjunction with the ZIP file sequencer to extract the Java metadata from JARs, WARs, and EAR files. And don’t forget the XML sequencer or our other sequencers for extracting metadata from images, MP3s, and Microsoft Office documents.

We’ve fixed quite a few bugs, added numerous improvements, and upgraded all third-party dependencies to the latest versions available at this time. The build system now supports running all of the tests against a variety of databases, making it very easy to test against DBMSes that JBoss DNA doesn’t directly test against. And we’ve added a new DDL generation utility that produces the DDL for the database schema created and used by the JPA connector. To top it all off, JCR repositories now support the use of anonymous users, though this can easily be changed for production purposes.

Thanks to the whole JBoss DNA community for all their hard work!

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Filed under: features, jcr, news, open source, repository

One Response

  1. […] release is basically just a rebranded form of the JBoss DNA 0.7 release published last week.  Basically, the goal was to make it as easy as possible to migrate an […]

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ModeShape is

a lightweight, fast, pluggable, open-source JCR repository that federates and unifies content from multiple systems, including files systems, databases, data grids, other repositories, etc.

Use the JCR API to access the information you already have, or use it like a conventional JCR system (just with more ways to persist your content).

ModeShape used to be 'JBoss DNA'. It's the same project, same community, same license, and same software.

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