public class EMFProviderCMT implements EMFProviderInterface
EntityManager and EntityManagerFactory in container's environment context via JNDI. For this implementation to work persistence-context-ref and persistence-unit-ref should be declared for enterprise bean in /META-INF/ejb-jar.xml. For example:
<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar
version = "3.0"
xmlns = "http://java.sun.com/xml/ns/javaee"
xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation = "http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/ejb-jar_3_0.xsd">
<enterprise-beans>
<session>
<ejb-name>TestEJB</ejb-name>
<persistence-context-ref>
<persistence-context-ref-name>REFERENCE_TO_ENTITY_MANAGER</persistence-context-ref-name>
<persistence-unit-name>PERSISTENCE_UNIT_NAME</persistence-unit-name>
</persistence-context-ref>
<persistence-unit-ref>
<persistence-unit-ref-name>REFERENCE_TO_ENTITY_MANAGER_FACTORY</persistence-unit-ref-name>
<persistence-unit-name>PERSISTENCE_UNIT_NAME</persistence-unit-name>
</persistence-unit-ref>
</session>
</enterprise-beans>
</ejb-jar>
getTransaction() will return instance of EJBContext located in "java:comp/EJBContext" in JNDI. Transaction will be committed by container. To roll back transaction EJBContext.setRollbackOnly() is used.| Modifier and Type | Field and Description |
|---|---|
java.lang.String | entityManagerFactoryRef Name of the reference to managed entity manager factory. |
java.lang.String | entityManagerRef Name of the reference to container managed entity manager. |
ENTITY_MANAGER, ENTITY_MANAGER_FACTORY, JPA_ENTITY_MANAGER, JPA_ENTITY_MANAGER_FACTORY, JPA_PERSISTENCE_UNIT_NAME, JPA_TRANSACTION, PERSISTENCE_UNIT_NAME, TRANSACTION| Constructor and Description |
|---|
EMFProviderCMT() Creates new EMF provider. |
EMFProviderCMT(java.util.Properties config) Creates new EMF provider. |
EMFProviderCMT(java.lang.String entityManagerRef, java.lang.String entityManagerFactoryRef) Creates new EMF provider with specified context reference names. |
| Modifier and Type | Method and Description |
|---|---|
void | commitTransaction(java.lang.Object tx) Does nothing - container will commit transaction. |
javax.persistence.EntityManagerFactory | get() Returns EntityManagerFactory found in container's environment context. |
javax.persistence.EntityManager | getEntityManager() Returns EntityManager found in container's environment context. |
java.lang.Object | getTransaction(javax.persistence.EntityManager em) Returns EJBContext found in container's environment context. |
void | returnEntityManager(javax.persistence.EntityManager em) Does nothing - container will close EntityManager. |
void | rollbackTransaction(java.lang.Object tx) Sets rollback flag for transaction by tx.setRollbackOnly(). |
public java.lang.String entityManagerRef
public java.lang.String entityManagerFactoryRef
public EMFProviderCMT()
EntityManager and EntityManagerFactory in container's environment context.public EMFProviderCMT(java.util.Properties config)
EntityManager and EntityManagerFactory in container's environment context.config - Properties for provider configuration.public EMFProviderCMT(java.lang.String entityManagerRef,
java.lang.String entityManagerFactoryRef) entityManagerRef - String name of context reference to entity manager.entityManagerFactoryRef - String name of context reference to entity manager factory.public javax.persistence.EntityManagerFactory get()
EntityManagerFactory found in container's environment context.get in interface EMFProviderInterfaceEntityManagerFactory can be used to acquire meta-data (for JPA 2.0) or implement "application managed entity manager" pattern.public javax.persistence.EntityManager getEntityManager()
throws javax.persistence.PersistenceException EntityManager found in container's environment context.getEntityManager in interface EMFProviderInterfaceEntityManager for persistence operations.javax.persistence.PersistenceException - if unable to acquire EntityManager.public void returnEntityManager(javax.persistence.EntityManager em)
EntityManager.returnEntityManager in interface EMFProviderInterfaceem - EntityManager which should be closed.public java.lang.Object getTransaction(javax.persistence.EntityManager em)
throws java.lang.Exception EJBContext found in container's environment context.getTransaction in interface EMFProviderInterfaceem - EntityManager needed if joining to existing transaction or null.Object Transaction for persistence operations.javax.persistence.PersistenceException - if unable to acquire or open transaction.java.lang.Exception - if unable to acquire or open transaction.public void commitTransaction(java.lang.Object tx)
throws java.lang.Exception commitTransaction in interface EMFProviderInterfacetx - Object transaction to be commited.java.lang.Exception - occured while committing transaction.public void rollbackTransaction(java.lang.Object tx)
tx.setRollbackOnly().rollbackTransaction in interface EMFProviderInterfacetx - Object transaction to be rolled back.