org.zkoss.zkplus.util
Class ThreadLocalListener

java.lang.Object
  org.zkoss.zkplus.util.ThreadLocalListener

All Implemented Interfaces:

org.zkoss.zk.ui.event.EventThreadCleanup, org.zkoss.zk.ui.event.EventThreadInit, org.zkoss.zk.ui.event.EventThreadResume

public class ThreadLocalListener
extends java.lang.Object
implements org.zkoss.zk.ui.event.EventThreadInit, org.zkoss.zk.ui.event.EventThreadCleanup, org.zkoss.zk.ui.event.EventThreadResume

Listener to make sure servlet thread and ZK event thread got the same ThreadLocal values. You have to declare this listener in WEB-INF/zk.xml as follows.

        <listener>
                <description>ThreadLocal Synchronization Listener</description>
                <listener-class>org.zkoss.zkplus.util.ThreadLocalListener</listener-class>
        </listener>
 

Besides that, you have to specify what ThreadLocal variables you want to sync. They are also spcified in WEB-INF/zk.xml file in the form as below.

  <preference>
    <name>ThreadLocal</name>
    <value>
                        class1=field1,field2,...;
                        class2=field1,field2,...;
                        ...
    </value>
  </preference>
 

For example, to support synchronizing Spring's thread bounded resources, you have to specify the following ThreadLocal variables:

        <preference>
                <name>ThreadLocal</name>
                <value>
                org.springframework.transaction.support.TransactionSynchronizationManager=resources,synchronizations,currentTransactionName,currentTransactionReadOnly,actualTransactionActive;
                org.springframework.orm.hibernate3.SessionFactoryUtils=deferredCloseHolder;
                org.springframework.transaction.interceptor.TransactionAspectSupport=transactionInfoHolder; <!-- ver. 2+ -->
                <!--org.springframework.transaction.interceptor.TransactionAspectSupport=currentTransactionInfo; ver. 1.28 -->
                </value>
        </preference>
 

 
Another example, when you specify the Spring's bean as scope="session", you have to specify the following
 ThreadLocal variables since Spring 2.0 use RequestContextHolder to handle the bean's scope.
 

        <preference>
        <name>ThreadLocal</name>
        <value>
                org.springframework.web.context.request.RequestContextHolder=requestAttributesHolder,inheritableRequestAttributesHolder;
        </value>
 




Since:
  
2.4.1
Author:
  
henrichen








Constructor Summary
ThreadLocalListener()



           
 



Method Summary




 void
abortResume(org.zkoss.zk.ui.Component comp,
            org.zkoss.zk.ui.event.Event evt)



           



 void
afterResume(org.zkoss.zk.ui.Component comp,
            org.zkoss.zk.ui.event.Event evt)



           



 void
beforeResume(org.zkoss.zk.ui.Component comp,
             org.zkoss.zk.ui.event.Event evt)



           



 void
cleanup(org.zkoss.zk.ui.Component comp,
        org.zkoss.zk.ui.event.Event evt,
        java.util.List errs)



           



 void
complete(org.zkoss.zk.ui.Component comp,
         org.zkoss.zk.ui.event.Event evt)



           



 void
init(org.zkoss.zk.ui.Component comp,
     org.zkoss.zk.ui.event.Event evt)



           



 void
prepare(org.zkoss.zk.ui.Component comp,
        org.zkoss.zk.ui.event.Event evt)



           


 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 





Constructor Detail



ThreadLocalListener
public ThreadLocalListener()






Method Detail



prepare
public void prepare(org.zkoss.zk.ui.Component comp,
                    org.zkoss.zk.ui.event.Event evt)


Specified by:
prepare in interface org.zkoss.zk.ui.event.EventThreadInit








init
public void init(org.zkoss.zk.ui.Component comp,
                 org.zkoss.zk.ui.event.Event evt)


Specified by:
init in interface org.zkoss.zk.ui.event.EventThreadInit








cleanup
public void cleanup(org.zkoss.zk.ui.Component comp,
                    org.zkoss.zk.ui.event.Event evt,
                    java.util.List errs)


Specified by:
cleanup in interface org.zkoss.zk.ui.event.EventThreadCleanup








complete
public void complete(org.zkoss.zk.ui.Component comp,
                     org.zkoss.zk.ui.event.Event evt)


Specified by:
complete in interface org.zkoss.zk.ui.event.EventThreadCleanup








beforeResume
public void beforeResume(org.zkoss.zk.ui.Component comp,
                         org.zkoss.zk.ui.event.Event evt)


Specified by:
beforeResume in interface org.zkoss.zk.ui.event.EventThreadResume








afterResume
public void afterResume(org.zkoss.zk.ui.Component comp,
                        org.zkoss.zk.ui.event.Event evt)


Specified by:
afterResume in interface org.zkoss.zk.ui.event.EventThreadResume








abortResume
public void abortResume(org.zkoss.zk.ui.Component comp,
                        org.zkoss.zk.ui.event.Event evt)


Specified by:
abortResume in interface org.zkoss.zk.ui.event.EventThreadResume