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Java Source Code / Java Documentation » J2EE » spring framework 2.0.6 » org.springframework.scheduling.commonj 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.springframework.jndi.JndiLocatorSupport
   org.springframework.scheduling.commonj.WorkManagerTaskExecutor

WorkManagerTaskExecutor
public class WorkManagerTaskExecutor extends JndiLocatorSupport implements SchedulingTaskExecutor,WorkManager,InitializingBean(Code)
TaskExecutor implementation that delegates to a CommonJ WorkManager, implementing the commonj.work.WorkManager interface, which either needs to be specified as reference or through the JNDI name.

This is the central convenience class for setting up a CommonJ WorkManager in a Spring context.

Also implements the CommonJ WorkManager interface itself, delegating all calls to the target WorkManager. Hence, a caller can choose whether it wants to talk to this executor through the Spring TaskExecutor interface or the CommonJ WorkManager interface.

The CommonJ WorkManager will usually be retrieved from the application server's JNDI environment, as defined in the server's management console.

Note: At the time of this writing, the CommonJ WorkManager facility is only supported on IBM WebSphere 6.0+ and BEA WebLogic 9.0+, despite being such a crucial API for an application server. (There is a similar facility available on WebSphere 5.0 Enterprise, though, which we will discuss below.)

A similar facility is available on WebSphere 5.0/5.1, under the name "Asynch Beans". Its central interface is called WorkManager too and is also obtained from JNDI, just like a standard CommonJ WorkManager. However, this WorkManager variant is notably different: The central execution method is called "startWork" instead of "schedule", and takes a slightly different Work interface as parameter.

Support for this WebSphere 5 variant can be built with this class and its helper DelegatingWork as template: Call the WorkManager's startWork(Work) instead of schedule(Work) in the execute(Runnable) implementation. Furthermore, for simplicity's sake, drop the entire "Implementation of the CommonJ WorkManager interface" section (and the corresponding implements WorkManager clause at the class level). Of course, you also need to change all commonj.work imports in your WorkManagerTaskExecutor and DelegatingWork variants to the corresponding WebSphere API imports (com.ibm.websphere.asynchbeans.WorkManager and com.ibm.websphere.asynchbeans.Work, respectively). This should be sufficient to get a TaskExecutor adapter for WebSphere 5.
author:
   Juergen Hoeller
since:
   2.0





Method Summary
public  voidafterPropertiesSet()
    
public  voidexecute(Runnable task)
    
public  booleanprefersShortLivedTasks()
     This task executor prefers short-lived work units.
public  WorkItemschedule(Work work)
    
public  WorkItemschedule(Work work, WorkListener workListener)
    
public  voidsetWorkListener(WorkListener workListener)
     Specify a CommonJ WorkListener to apply, if any.
public  voidsetWorkManager(WorkManager workManager)
     Specify the CommonJ WorkManager to delegate to.
public  voidsetWorkManagerName(String workManagerName)
     Set the JNDI name of the CommonJ WorkManager.
public  booleanwaitForAll(Collection workItems, long timeout)
    
public  CollectionwaitForAny(Collection workItems, long timeout)
    



Method Detail
afterPropertiesSet
public void afterPropertiesSet() throws NamingException(Code)



execute
public void execute(Runnable task)(Code)



prefersShortLivedTasks
public boolean prefersShortLivedTasks()(Code)
This task executor prefers short-lived work units.



schedule
public WorkItem schedule(Work work) throws WorkException, IllegalArgumentException(Code)



schedule
public WorkItem schedule(Work work, WorkListener workListener) throws WorkException, IllegalArgumentException(Code)



setWorkListener
public void setWorkListener(WorkListener workListener)(Code)
Specify a CommonJ WorkListener to apply, if any.

This shared WorkListener instance will be passed on to the WorkManager by all WorkManagerTaskExecutor.execute calls on this TaskExecutor.




setWorkManager
public void setWorkManager(WorkManager workManager)(Code)
Specify the CommonJ WorkManager to delegate to.

Alternatively, you can also specify the JNDI name of the target WorkManager.
See Also:   WorkManagerTaskExecutor.setWorkManagerName




setWorkManagerName
public void setWorkManagerName(String workManagerName)(Code)
Set the JNDI name of the CommonJ WorkManager.

This can either be a fully qualified JNDI name, or the JNDI name relative to the current environment naming context if "resourceRef" is set to "true".
See Also:   WorkManagerTaskExecutor.setWorkManager
See Also:   WorkManagerTaskExecutor.setResourceRef




waitForAll
public boolean waitForAll(Collection workItems, long timeout) throws InterruptedException, IllegalArgumentException(Code)



waitForAny
public Collection waitForAny(Collection workItems, long timeout) throws InterruptedException, IllegalArgumentException(Code)



Fields inherited from org.springframework.jndi.JndiLocatorSupport
final public static String CONTAINER_PREFIX(Code)(Java Doc)

Methods inherited from org.springframework.jndi.JndiLocatorSupport
protected String convertJndiName(String jndiName)(Code)(Java Doc)
public boolean isResourceRef()(Code)(Java Doc)
protected Object lookup(String jndiName) throws NamingException(Code)(Java Doc)
protected Object lookup(String jndiName, Class requiredType) throws NamingException(Code)(Java Doc)
public void setResourceRef(boolean resourceRef)(Code)(Java Doc)

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