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Soft Reference Object Cache Recommendation

" /> <dirty-tracking arrays="false" /> My persisted class, "JdoBlob2", only contains a byte ... (){ // A dirty object, via setData(), strongly references byte[] via "data" field, so ignore ... necessary (e.g. for dirty objects until commit). On the other hand the data store page cache is fixed

500Mb ObjectDb database opening issue

500Mb ObjectDb database opening issue

Replication error on slave restart

="true" /> <dirty-tracking arrays="false" /> </entities> <schema> </schema> <server ... always="auto" on-persist="false" on-commit="true" />   <dirty-tracking arrays="false" /> </entities

PersistenceException: Failed to locate field

always = "true" on-persist = "true" on-commit = "true"/> <dirty-tracking arrays = "true ... " on-commit = "true"/>     <dirty-tracking arrays = "true"/>   </entities

EntityManagerFactory Fails To Swtich Over To Slave When Master Is Unavailable

="true" />                 <dirty-tracking arrays="false" />         </entities>         <schema ... " />                 <cascade-persist always="auto" on-persist="false" on-commit="true" />                 <dirty

Embedded in JDO metadata not working in objectDB 2.x ?

all the relevant containing entity objects, makes them dirty and persists them. Check that new embedded objects ... which retrieves the containing entities, made them dirty and persisted them. So far everything went

PostUpdate on array changes

"/> <cascade-persist always = "true" on-persist = "true" on-commit = "true"/> <dirty-tracking arrays ... objectdb.conf file I will revisit the issue of dirty tracking of arrays. However, I have these new concerns


Method javax.jdo.listener.DirtyLifecycleListener void postDirty( InstanceLifecycleEvent event ) Invoked whenever a persistent instance is first made dirty, during an operation that modifies the value of a persistent or transactional field. Called after the value is changed. Parameters: event - Since: JDO 2.0

makeDirty(pc, fieldName)

Method javax.jdo.spi.StateManager void makeDirty( PersistenceCapable pc, String fieldName ) Mark the associated PersistenceCapable field dirty. The StateManager will make a copy of the field so it can be restored if needed later, and then mark the field as modified in the current transaction


and the instances revert to transient. Additionally, dirty instances transition to hollow

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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