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Optimization Question

of data objects called tracks. These tracks change very frequently over time (every 10-15 seconds ... sequence executes when a track update comes in: - If it’s a new track simply add it to the database. - If it's an update to an existing track, delete the entire previous entry and then add in the new

Dirty checking

config settings to track changes to collections, e.g: http://www.objectdb.com/java/jpa/setting ... the config file to track array changes. 2) capture all entities changed during the transaction ... looking to do is to be able to use dirty tracking to a single 'view projection update' calculation

PostUpdate on array changes

"/> <cascade-persist always = "true" on-persist = "true" on-commit = "true"/> <dirty-tracking arrays ... is whether it is possible to track changes to lists of primitives? dmoshal David Moshal Hmm, digging into this some ... objectdb.conf file I will revisit the issue of dirty tracking of arrays. However, I have these new concerns

PersistenceManager.getObjectsById(Collection,boolean) throwing JDOException

may help. support Support Ok, I think it must be a problem with the way I'm keeping track of my oids ... :259) at peoiws5.track.server.DefaultTrackServer.processCommands(DefaultTrackServer.java:347) at peoiws5.track.server.DefaultTrackServer.handleNextCommands(DefaultTrackServer.java:333

Apache License, Version 2.0, January 2004

, and issue tracking systems that are managed by, or on behalf of, the Licensor for the purpose

JPA / JDO Class Enhancer

tracking of persistent field modifications, avoiding the need for snapshot comparison of entities (as

ObjectDB License

to use ObjectDB. Support Limited free support is available through the Forum and via Issue Tracking

Posting Sample Code

To demonstrate a technical question or an issue - you may have to provide a complete runnable sample program. If an unexpected exception (e.g. NullPointerException or ClassCastException) is thrown by ObjectDB - posting the full stack trace with no sample program (using the Issue Tracking

Soft Reference Object Cache Recommendation

" /> <dirty-tracking arrays="false" /> My persisted class, "JdoBlob2", only contains a byte ... JdoBlob2 caching, then I think I must need to track all JdoBlob2s myself and, upon detecting a full JVM ... callback/listeners to track all objects in a manual strong reference list and upon GC detection manually

[ODB1] Chapter 6 - Persistent Objects

or as persistence aware. Otherwise, modifications cannot be tracked by ObjectDB, and at transaction

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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