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Java Source Code / Java Documentation » J2EE » spring framework 2.5 » org.springframework.orm.jpa 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.springframework.orm.jpa.EntityManagerFactoryAccessor
      org.springframework.orm.jpa.JpaAccessor

All known Subclasses:   org.springframework.orm.jpa.JpaInterceptor,  org.springframework.orm.jpa.JpaTemplate,
JpaAccessor
abstract public class JpaAccessor extends EntityManagerFactoryAccessor implements InitializingBean(Code)
Base class for JpaTemplate and JpaInterceptor, defining common properties such as EntityManagerFactory and flushing behavior.

Not intended to be used directly. See JpaTemplate and JpaInterceptor .
author:
   Juergen Hoeller
since:
   2.0
See Also:   JpaAccessor.setEntityManagerFactory
See Also:   JpaAccessor.setEntityManager
See Also:   JpaAccessor.setJpaDialect
See Also:   JpaAccessor.setFlushEager
See Also:   JpaTemplate
See Also:   JpaInterceptor
See Also:   JpaDialect





Method Summary
public  voidafterPropertiesSet()
     Eagerly initialize the JPA dialect, creating a default one for the specified EntityManagerFactory if none set.
protected  voidflushIfNecessary(EntityManager em, boolean existingTransaction)
     Flush the given JPA entity manager if necessary.
public  EntityManagergetEntityManager()
     Return the JPA EntityManager to use.
public  JpaDialectgetJpaDialect()
     Return the JPA dialect to use for this accessor.
public  booleanisFlushEager()
     Return if this accessor should flush changes to the database eagerly.
public  voidsetEntityManager(EntityManager entityManager)
     Set the JPA EntityManager to use.
public  voidsetFlushEager(boolean flushEager)
     Set if this accessor should flush changes to the database eagerly.

Eager flushing leads to immediate synchronization with the database, even if in a transaction.

public  voidsetJpaDialect(JpaDialect jpaDialect)
     Set the JPA dialect to use for this accessor.
public  RuntimeExceptiontranslateIfNecessary(RuntimeException ex)
     Convert the given runtime exception to an appropriate exception from the org.springframework.dao hierarchy if necessary, or return the exception itself if it is not persistence related

Default implementation delegates to the JpaDialect.




Method Detail
afterPropertiesSet
public void afterPropertiesSet()(Code)
Eagerly initialize the JPA dialect, creating a default one for the specified EntityManagerFactory if none set.



flushIfNecessary
protected void flushIfNecessary(EntityManager em, boolean existingTransaction) throws PersistenceException(Code)
Flush the given JPA entity manager if necessary.
Parameters:
  em - the current JPA PersistenceManage
Parameters:
  existingTransaction - if executing within an existing transaction
throws:
  javax.persistence.PersistenceException - in case of JPA flushing errors



getEntityManager
public EntityManager getEntityManager()(Code)
Return the JPA EntityManager to use.



getJpaDialect
public JpaDialect getJpaDialect()(Code)
Return the JPA dialect to use for this accessor.

Creates a default one for the specified EntityManagerFactory if none set.




isFlushEager
public boolean isFlushEager()(Code)
Return if this accessor should flush changes to the database eagerly.



setEntityManager
public void setEntityManager(EntityManager entityManager)(Code)
Set the JPA EntityManager to use.



setFlushEager
public void setFlushEager(boolean flushEager)(Code)
Set if this accessor should flush changes to the database eagerly.

Eager flushing leads to immediate synchronization with the database, even if in a transaction. This causes inconsistencies to show up and throw a respective exception immediately, and JDBC access code that participates in the same transaction will see the changes as the database is already aware of them then. But the drawbacks are:

  • additional communication roundtrips with the database, instead of a single batch at transaction commit;
  • the fact that an actual database rollback is needed if the JPA transaction rolls back (due to already submitted SQL statements).



setJpaDialect
public void setJpaDialect(JpaDialect jpaDialect)(Code)
Set the JPA dialect to use for this accessor.

The dialect object can be used to retrieve the underlying JDBC connection, for example.




translateIfNecessary
public RuntimeException translateIfNecessary(RuntimeException ex)(Code)
Convert the given runtime exception to an appropriate exception from the org.springframework.dao hierarchy if necessary, or return the exception itself if it is not persistence related

Default implementation delegates to the JpaDialect. May be overridden in subclasses.
Parameters:
  ex - runtime exception that occured, which may or may notbe JPA-related the corresponding DataAccessException instance ifwrapping should occur, otherwise the raw exception
See Also:   org.springframework.dao.support.DataAccessUtils.translateIfNecessary




Fields inherited from org.springframework.orm.jpa.EntityManagerFactoryAccessor
final protected Log logger(Code)(Java Doc)

Methods inherited from org.springframework.orm.jpa.EntityManagerFactoryAccessor
protected EntityManager createEntityManager() throws IllegalStateException(Code)(Java Doc)
public EntityManagerFactory getEntityManagerFactory()(Code)(Java Doc)
public Map getJpaPropertyMap()(Code)(Java Doc)
protected EntityManager getTransactionalEntityManager() throws IllegalStateException(Code)(Java Doc)
public void setEntityManagerFactory(EntityManagerFactory emf)(Code)(Java Doc)
public void setJpaProperties(Properties jpaProperties)(Code)(Java Doc)
public void setJpaPropertyMap(Map jpaProperties)(Code)(Java Doc)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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