Release Notes: Some issues in the last release candidate were fixed. No major feature changes were implemented.
Release Notes: A JDO prototype and a working sample application were implemented. A new Servlet Implementation allows you to easily deploy the OJB Server as an HTTP-Servlet. Full JTA and JCA integration is in place.
Release Notes: OJB now supports the JTA Transaction API which allows easy integration into J2EE App Servers. This release has also added a reverse engineering tool that helps to build mapping repositories for existing database tables.
Release Notes: OJB now supports transparent mapping of M:N relations. Transparent assignment of foreign key values is now also supported. Proxies for lazy loading of Collections have been implemented. The Query API now supports Path expressions, which are translated to SQL JOIN statements internally. The Exception handling has been improved.
Release Notes: This release provides mapping support for m:n associations. The Proxy mechanism has been made available for JDK1.2 by means of a replacement of the JDK1.3 dynamic proxies. The documentation has improved a lot.
Release Notes: This release contains a load of new documentation: a tutorial on advanced o/r mapping techniques, a complete guide to the ojb Lockmanagement, and a roadmap for planned development activities. It is now possible to use JDK 1.3 Dynamic Proxies for lazy loading. The implicit locking mechanism can now be configured. A TestSuite for the Lockmanager has been written.
Release Notes: The new concept of RowReaders allows users to interact with object materialization from ResultSet Rows. Mapping inheritance hierarchies on one table is now supported. A Distributed persistent Lockmanagement has been implemented. The LockManager, ObjectCache, SequenceManager, and ConnectionFactory are now pluggable to support user extensions. MySQL and PostgreSQL are now supported. A DDL Generator that produces DDL from XML mapping files has been implemented. A JDNI/Datasource based ConnectionFactory is now available for usage in J2EE Containers. SequenceNumbering is now possible via declaration in the XML repository.
Release Notes: Many new features are included in this release. A PersistenceBroker server arcitecture has been designed, which allows you to run multiple clients against one or more loadbalanced server processes. This new architecture allows you to build highly scalable distributed applications with OJB - however, distributed Lockhandling is not finished yet. The project has been renamed to ObJectRelationalBridge, as the old name is trademark protected. Some major performance enhancements have also been made.
Release Notes: This release adds OQL parameter binding operation and OQL filter operations in ODMG Collection, and a tutorial and a code example covering Conversion Strategies. DListImpl, DBagImpl, DSetImpl, DMapImpl, and the respective Iterators now provide remove() methods. The __ prefix has been removed from the OJB internal tables, to allow easier ports to Oracle, DB2, and other DBMS. To minimize the size of serialized Identities, they are now GZIPed. The RsIterator methods next() and hasNext() have been rewritten to work even with buggy JDBC 2.0 drivers. Creation and preparation of prepared Statements is now compliant with JDBC 2.0 drivers for DB2 and Oracle. ojb.server has been renamed to ojb.odmg to better reflect its content. The deletion sequence for depended objects has been changed to prevent referential integrity violations.