Package com.ibm.websphere.objectgrid.em

This package contains the primary interfaces for the EntityManager.

See:
Description

Interface Summary

EntityManager	An EntityManager allows transactional introspection and manipulation of entities.
EntityTransaction	An EntityTransaction is associated with an EntityManager and is used to demarcate a transaction.
Query	Interface used to control entity query execution.

Class Summary

FlushModeType

Used to specify when the flush behavior of an EntityManager query when running within a transaction.

Exception Summary

EntityExistsException	Thrown when an entity can't be persisted because it would result in a duplicate key violation.
NonUniqueResultException	Thrown when Query.getSingleResult() is invoked and there is more than one result from the query.
NoResultException	Thrown when Query.getSingleResult() is invoked and there is no result to return.
PersistenceException	Thrown by the EntityManager when a problem occurs.
RollbackException	Thrown when EntityTransaction.commit() fails.
TransactionRequiredException	Thrown when a transaction is required but not active.

Package com.ibm.websphere.objectgrid.em Description

This package contains the primary interfaces for the EntityManager.

Overview

The EntityManager API allows simplified access to the ObjectGrid data cache. Java classes are described using annotations or XML as entities. Entities are Java objects that contain persistable attributes and relationships to other entities. The entities can be persisted into the cache and queried using the ObjectGrid Query Language.