@version $Id$ ======================================================================== ObJectRelationalBridge -- Bridging Java Objects and Relational Databases ======================================================================== ObJectRelationalBridge (OJB) is an Object/Relational mapping tool that provides transparent transactional persistence for Java Objects against relational databases. OJB provides ODMG and JDO interfaces. --------------------------------------------------------------------- Release 1.0 rc5 --------------------------------------------------------------------- This is the last planned rc before the 1.0 release. If there are no major bugs this release will be relabled as 1.0 after two weeks. NEW FEATURES: - With this release we are feature complete for the 1.0 release! For 1.0 you should not expect more features to be added. NOTES: - slight changes in repository.dtd, OJB.properties were made - internal kernel interface method signature changed: in JdbcAccess two method signatures change in StatementManagerIF one method signature change These changes are necessary to fix a "design bug" in handling of jdbc type metadata. See discussion on dev-list "[VOTE] Design bug fixed - check in?" - ObjectCache implementation classes constructor arguments change. We now pass a Properties argument too. Allows to set configuration properties for each ObjectCache instance - changed the JDORI plugin to now use the latest 1.0.1 version of the JDO reference implementation. - OJB is now very strict in handling RsIterator instances. RsIterator is bound very closely to the used PersistenceBroker instance. Thus if you do a PersistenceBroker#close PersistenceBroker#commitTransaction PersistenceBroker#abortTransaction call, the current RsIterator instance resources will be cleaned up automatic and invalidate current instance. CHANGES: - add possibility to declare ObjectCache implementation on class-descriptor and jdbc-connection-descriptor level (means per class and per database connection) too - add a new interface called org.apache.ojb.odmg.TransactionExt to make additional proprietary methods available for user by casting org.odmg.Transaction to TransactionExt - behaviour of org.odmg.Transaction#checkpoint() changed. Now the database transaction was commited when checkpoint was called, seems this is more in unison with ODMG spec: " Calling checkpoint commits persistent object modifications made within the transaction since the last checkpoint to the database." If you want to flush persistent object modifications made within the ODMG transaction to the underlying database transaction without commit the changes (old behaviour of checkpoint()), please cast Transaction to TransactionExt and use new method flush(). - make odmg collections pluggable via OJB.properties file - Restructuring and further enhancements of the documentation. BUG FIXES: Please refer to our Bug tracking site under http://scarab.werken.com/scarab/issues/id/OJBxxx to see details for a bug with id OJBxxx. - fix ClassLoader problem when merging DescriptorRepository instances - fixed the JDORI problems with loading object via extend based queries. now objects are brought under JDO control and equipped with a statemanager in the load process. --------------------------------------------------------------------- Release 1.0 rc4 --------------------------------------------------------------------- NEW FEATURES: - With this release we are feature complete for the 1.0 release! For 1.0 you should not expect more features to be added. - added a XDoclet OJB Module that allows to generate repository.xml and DDL from tagged Java sources to the "contrib" distribution. - added an OJB Taglib that allows to use OJB directly from JSP pages to the "contrib" distribution. NOTES: - update used xdoclet version in 'ejb-examples' (see section deployment/'Build the OJB sample session beans') to version 1.2xx CHANGES: - Enhance MetadataManager, add new methods, simplify handling of different persistent object metadata profiles (means different org.apache.ojb.broker.metadata.DescriptorRepository instances) at runtime - Provide a PUBLIC doctype declaration for the repository.xml - add a convenience Constructor to QueryByCriteria that builds a query selecting all instances of a class - add isClosed() method to PersistenceBroker interface to check if a broker instance was already closed. - make OJB more strict in handling closed PersistenceBroker instances. Now it's not any longer possible to use closed PersistenceBroker instances. - Package ...metadata.fieldaccess refactored/changed. Now all PersistentField implementations support 'nested fields'. See new entries in OJB.properties file. - added new sections to documentation BUG FIXES: - fix several bugs in documentation - fixed writing to memo columns in MS Access - fixed optimistic locking problem - fixed jdo tutorial setup Please refer to our Bug tracking site under http://scarab.werken.com/scarab/issues/id/OJBxxx to see details for a bug with id OJBxxx. --------------------------------------------------------------------- Release 1.0 rc3 --------------------------------------------------------------------- NEW FEATURES: - With this release we are feature complete for the 1.0 release! For 1.0 you should not expect more features to be added. NOTES: - Intern table OJB_HL_SEQ (used by SequenceManagerHighLowImpl) has changed! Now need an additional column 'VERSION' of type INTEGER When updating from earlier version drop/reinstall table with additional field - PersistenceBrokerAware interface changed, methods beforeStore and afterStore split into xxxInsert/xxxUpdate methods, all methods now expect an PersistenceBroker argument - PersistenceBrokerListener interface replaced by PBStateListener - ManageableCollection interface add new method afterStore(...) - Remove obsolete method 'invalidate(Identity oid)' from PB-api CHANGES: - enhanced PB-api listener classes - unified handling of events in PB-api - adapt sequence manager implementations using 'long' instead 'int' keys - SequenceManagerHighLowImpl now use optimistic locking to support sequencing across different JVM (except j2ee conform app server, see sequence manager doc). - Add new attribute 'autoNaming' to sequence manager implementations. Now the implementations allow to switch on/off auto-generating of sequence names - merging the three package o.a.ojb.broker.ta, .singlevm and .server into a new package o.a.ojb.broker.core BUG FIXES: - fixed problems with the JDO FieldManager to work with 1:1, 1:n and m:n associations - OJB143, OJB152, OJB153, OJB156, OJB158, OJB159, OJB161 Please refer to our Bug tracking site under http://scarab.werken.com/scarab/issues/id/OJBxxx to see details for a bug with id OJBxxx. --------------------------------------------------------------------- Release 1.0 rc2 --------------------------------------------------------------------- NEW FEATURES: - With this release we are feature complete for the 1.0 release! For 1.0 you should not expect more features to be added. CHANGES: - improve cache package. Now the used cache is no longer a singleton. - Add CacheFilter interface to allow easy pre-filtering of cache methods. - Add Support for anonymous fields - Several improvements to SQL generation - improved handling of optimistic lock exceptions in ODMG BUG FIXES: - lots --------------------------------------------------------------------- Release 1.0 rc1 --------------------------------------------------------------------- NEW FEATURES: - With this release we are feature complete for the 1.0 release! For 1.0 you should not expect more features to be added. CHANGES: - improved handling for non-distributable jars - MetadataManager: new methods, allow merge of new ConnectionDescriptor and RepositoryDescriptor (read from any repository file at runtime) with the existing ones. - add custom attribute support for DescriptorRepository and JdbcConnectionDescriptor. BUG FIXES: - repaired tutorial applications - fixed several bugs in the JDO RI plugin - compilation works for jdk 1.2 and 1.3 again - connection problem when using PBKey only with jcdAlias name (e.g. PBKey("myAlias")), now the user and password set in the repository file was used. - add jcdAlias support for tutorial 1+2 More information is available at http://db.apache.org/ojb Copyright (c) 2000 - 2003 Thomas Mahler, et al.