org.zkoss.zkplus.jpa

Class OpenEntityManagerInViewListener

java.lang.Object

org.zkoss.zkplus.jpa.OpenEntityManagerInViewListener

All Implemented Interfaces:

org.zkoss.zk.ui.util.ExecutionCleanup, org.zkoss.zk.ui.util.ExecutionInit

public class OpenEntityManagerInViewListener
extends Object
implements org.zkoss.zk.ui.util.ExecutionCleanup, org.zkoss.zk.ui.util.ExecutionInit

Listener to init and cleanup the JPA entityManager automatically

In WEB-INF/zk.xml, add following lines:

        <listener>
                <description>Hibernate "OpenEntityManagerInView" Listener</description>
                <listener-class>org.zkoss.zkplus.jpa.OpenEntityManagerInViewListener</listener-class>
        </listener>
 

Applicable to EJB version 3.2.ga or later

Since:

3.0.2

Author:

Jeff

Constructor Summary

Constructors

Constructor and Description
OpenEntityManagerInViewListener()

Method Summary

Methods

Modifier and Type	Method and Description
void	cleanup(org.zkoss.zk.ui.Execution exec, org.zkoss.zk.ui.Execution parent, List errs)
protected void	handleException(org.zkoss.zk.ui.Execution exec, Throwable ex) Default exception handler.
void	init(org.zkoss.zk.ui.Execution exec, org.zkoss.zk.ui.Execution parent)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OpenEntityManagerInViewListener

public OpenEntityManagerInViewListener()

Method Detail

cleanup

public void cleanup(org.zkoss.zk.ui.Execution exec,
           org.zkoss.zk.ui.Execution parent,
           List errs)
             throws Exception

Specified by:

cleanup in interface org.zkoss.zk.ui.util.ExecutionCleanup

Throws:

Exception

init

public void init(org.zkoss.zk.ui.Execution exec,
        org.zkoss.zk.ui.Execution parent)
          throws Exception

Specified by:

init in interface org.zkoss.zk.ui.util.ExecutionInit

Throws:

Exception

handleException

protected void handleException(org.zkoss.zk.ui.Execution exec,
                   Throwable ex)

Default exception handler. This implementation simply rollback the transaction.

Application developer might want to extends this class and override this method to do other things like compensate for any permanent changes during the conversation, and finally restart business conversation... what can be done here depends on the applications design.

Parameters:

exec - the execution to clean up.

ex - the Throwable which is not handled during the execution