About time

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JPA Doc
2

javax.persistence.EntityManagerFactory

EntityManager. This method returns a new EntityManager instance each time it is invoked. The isOpen ... returns a new EntityManager instance each time it is invoked. The isOpen method will return true
JPA Doc
2

javax.persistence.Enumerated

: public enum EmployeeStatus {FULL_TIME, PART_TIME, CONTRACT} public enum SalaryRate
JDO Doc
2

javax.jdo.Query

in the cache. For optimistic transactions, this can dramatically improve query response times ... class Date; or one of the java.sql classes Date, Time, or Timestamp; or a user-defined class
Issue
2

Freeze during save

.Thread.State: TIMED_WAITING at java.lang.Object.wait(Native Method) - waiting ... t@27 java.lang.Thread.State: TIMED_WAITING at java.lang.Object.wait(Native Method ... .Thread.State: TIMED_WAITING at java.lang.Object.wait(Native Method) - waiting
Issue
2

each 1-2 days objects on some objectdb level lock/block each other

timing in which each thread dump was taken. If you can produce several more thread dumps (in production ... to another database. we try to agree on a bit more time, but the situation is really hot We are analysing ... (maybe reaching 100%?), and then in peak time the system is obviously overloaded? ObjectDB uses
Forum
2

Connection performace after upgrade to objectdb 2

[] args)  {         for (int i = 0; i < 5; i++) {             long time = System.currentTimeMillis ... ");             System.out.println("Obtaining PersistenceManagerFactory: " +                 (System.currentTimeMillis() - time));             for (int j = 0; j < 5; j++) {                 time = System.currentTimeMillis
Forum
2

Performance in large transactions

may have to be applied each time again and again, in order to check their up to date validity and integrate ... ();   System.out.println("test_OneTransaction  create time: "     + (System.currentTimeMillis() - startTime ... ();   }   System.out.println("test_ManyTransactions  create time: "     + (System.currentTimeMillis() - startTime
Issue
2

Best practise loading big data

of different Db files at the same time, each with own entitiy manager and open transaction holding ... of WeakReference objects) grows and grows within this transaction, even if at some time the GC collects ... . One could expect that the could be reused if their referenced objects are freed or that from time
JDO Doc
1

addInstanceLifecycleListener(listener, classes)

is configurable (before the first time getPersistenceManager is called). The classes parameter identifies
JPA Doc
1

addTransformer(transformer)

transformer that the container invokes at class-(re)definition time Since: JPA 1.0