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7

General Performance Issues Illustrated with a Specific Method

General Performance Issues Illustrated with a Specific Method
7

Query can't see recently persisted object

("here"); } MyObject myObject; try { myObject = query.getSingleResult
7

enumeration table? how to on pure jpa?

", Enumerations.class).getSingleResult(); Alternatively you can define a special entity class, e.g
7

newbie - lots of exeptions

.objectdb.jpa.JpaQuery.getSingleResult(JpaQuery.java:716) at com.prohire.prohire_sync
7

Merge with Parent/Child entities not possible

parentEntity = parentEntityQuery.getSingleResult();   entityManager.refresh(parentEntity);   Assert
7

Memory Leak?

));    //q1.executeUpdate();    Device d = (Device) q1.getSingleResult();    //em.remove(d);    if (j
1

Can't open replicated database

.objectdb.jpa.JpaQuery.getSingleResult(JpaQuery.java:654) at rbccm.felix.objectdb.messaging
1

NullPointer when accessing persistent field

).getSingleResult();         List list = a.list;         a = null;         System.gc
1

unexpected exception

:210) at com.objectdb.o.QRR.b(QRR.java:138) at com.objectdb.jpa.JpaQuery.getSingleResult(JpaQuery.java
1

queries under 2.7.6_4 significantly slower than under 2.7.6

).getSingleResult(); thread.join(); em.close(); emf.close

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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