About flush

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JDO Doc
78

flush()

Method javax.jdo.PersistenceManager void flush() Flushes all dirty, new, and deleted instances to the data store. It has no effect if a transaction is not active. If a datastore transaction is active ... is held until the end of the transaction. If exceptions occur during flush, the implementation
JPA Doc
77

flush()

Method javax.persistence.EntityManager void flush() Synchronize the persistence context to the underlying database. Throws: TransactionRequiredException - if there is no transaction PersistenceException - if the flush fails Since: JPA 1.0
Manual
39

Setting and Tuning of JPA Queries

on which they were invoked). Flush Mode (setFlushMode) Changes made to a database using an EntityManager ... . Therefore, before a query is executed, uncommitted database changes (if any) have to be flushed to the database in order to be visible to the query. Flush policy in JPA is represented by the FlushModeType enum
Manual
33

Storing JPA Entity Objects

of entity objects requires special consideration. The combination of the clear and flush methods ... % 10000) == 0) { em.flush(); em.clear(); } } em.getTransaction ... are flushed to the database before clearing, otherwise they would be lost. Updates that are sent
Issue
27

ArrayIndexOutOfBoundsException on flush

The following exception was thrown when my app attempted to flush an objectdb database: Caused by: rbccm.felix.framework.ApplicationException: Error flushing graph container at rbccm.felix.objectdb.workflow.ObjectDbGraphContainer.flush(Unknown Source) at rbccm.felix.objectdb.workflow
Forum
27

em.flush(); em.clear(); loosing data and not persisting managed objects

I'm having trouble with flush() and clear() in a loop inside a transaction not persisting modified ... .persist(v); v.setRemark(sbs); if(i % 10 == 0) { System.out.println("flushing"); em.flush(); em.clear(); } System.out.println("i="+i); TestEntity t1 = em.find
Issue
26

An entityManager.flush() with many entities is not possible

  The following exception occures if we call entityManager.flush() where the corresponding JPA ... .getTransaction().commit() instead of a entityManager.flush() works correctly. Unfortunately I have not found a simple example to reproduce this exception. The entity model of the flushed JPA
Forum
26

Internal objectdb error when execute a flush

We get an internal objectdb error, when we execute a flush. Why? What's wrong? It performs ... ) ~[na:na] at com.objectdb.o.OBM.flush(OBM.java:768) ~[na:na] at com.btc.ep.coverage.ccode.bl.internal ... ) ~[na:na] at com.objectdb.o.OBM.flush(OBM.java:765) ~[na:na] ... 19 common frames omitted
Issue
25

Internal exception on flush

); em.flush(); loadedgraph = instance; } [ObjectDB 2.3.3_06] Unexpected exception (Error 990 ... ) at com.objectdb.o.OBM.flush(OBM.java:739) at rbccm.felix.objectdb.workflow.ObjectDbGraphContainer
Manual
21

Entity Management Settings

context (until commit or flush), regardless of this setting. The level2 attribute specifies the size ... whether cascading (as a result of either global or local setting) should be applied during commit and flush ... on commit or flush. Usually, commit time only cascade (which is more efficient than double cascade