org.springframework.jca.work
Class WorkManagerTaskExecutor

java.lang.Object
  org.springframework.jndi.JndiAccessor
      org.springframework.jndi.JndiLocatorSupport
          org.springframework.jca.work.WorkManagerTaskExecutor

All Implemented Interfaces:

Executor, WorkManager, Aware, InitializingBean, AsyncTaskExecutor, TaskExecutor, BootstrapContextAware, SchedulingTaskExecutor

Direct Known Subclasses:

GlassFishWorkManagerTaskExecutor, JBossWorkManagerTaskExecutor

public class WorkManagerTaskExecutor
extends JndiLocatorSupport
implements SchedulingTaskExecutor, AsyncTaskExecutor, WorkManager, BootstrapContextAware, InitializingBean

TaskExecutor implementation that delegates to a JCA 1.5 WorkManager, implementing the WorkManager interface.

This is mainly intended for use within a JCA ResourceAdapter implementation, but may also be used in a standalone environment, delegating to a locally embedded WorkManager implementation (such as Geronimo's).

Also implements the JCA 1.5 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 JCA 1.5 WorkManager interface.

This adapter is also capable of obtaining a JCA WorkManager from JNDI. This is for example appropriate on the Geronimo application server, where WorkManager GBeans (e.g. Geronimo's default "DefaultWorkManager" GBean) can be linked into the J2EE environment through "gbean-ref" entries in the geronimo-web.xml deployment descriptor.

On JBoss and GlassFish, obtaining the default JCA WorkManager requires special lookup steps. See the JBossWorkManagerTaskExecutor GlassFishWorkManagerTaskExecutor classes which are the direct equivalent of this generic JCA adapter class.

Since:

2.0.3

Author:

Juergen Hoeller

See Also:

setWorkManager(javax.resource.spi.work.WorkManager), WorkManager.scheduleWork(javax.resource.spi.work.Work)

Field Summary

Fields inherited from class org.springframework.jndi.JndiLocatorSupport

CONTAINER_PREFIX

Fields inherited from class org.springframework.jndi.JndiAccessor

logger

Fields inherited from interface org.springframework.core.task.AsyncTaskExecutor

TIMEOUT_IMMEDIATE, TIMEOUT_INDEFINITE

Fields inherited from interface javax.resource.spi.work.WorkManager

IMMEDIATE, INDEFINITE, UNKNOWN

Constructor Summary

WorkManagerTaskExecutor()
Create a new WorkManagerTaskExecutor, expecting bean-style configuration.

WorkManagerTaskExecutor(WorkManager workManager)
Create a new WorkManagerTaskExecutor for the given WorkManager.

Method Summary

void	afterPropertiesSet() Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
void	doWork(Work work)
void	doWork(Work work, long delay, ExecutionContext executionContext, WorkListener workListener)
void	execute(Runnable task) Execute the given task.
void	execute(Runnable task, long startTimeout) Execute the given task.
protected WorkManager	getDefaultWorkManager() Obtain a default WorkManager to delegate to.
boolean	prefersShortLivedTasks() This task executor prefers short-lived work units.
void	scheduleWork(Work work)
void	scheduleWork(Work work, long delay, ExecutionContext executionContext, WorkListener workListener)
void	setBlockUntilCompleted(boolean blockUntilCompleted) Set whether to let execute(java.lang.Runnable) block until the work has been completed.
void	setBlockUntilStarted(boolean blockUntilStarted) Set whether to let execute(java.lang.Runnable) block until the work has been actually started.
void	setBootstrapContext(BootstrapContext bootstrapContext) Specify the JCA BootstrapContext that contains the WorkManager to delegate to.
void	setWorkListener(WorkListener workListener) Specify a JCA 1.5 WorkListener to apply, if any.
void	setWorkManager(WorkManager workManager) Specify the JCA WorkManager instance to delegate to.
void	setWorkManagerName(String workManagerName) Set the JNDI name of the JCA WorkManager.
long	startWork(Work work)
long	startWork(Work work, long delay, ExecutionContext executionContext, WorkListener workListener)
<T> Future<T>	submit(Callable<T> task) Submit a Callable task for execution, receiving a Future representing that task.
Future<?>	submit(Runnable task) Submit a Runnable task for execution, receiving a Future representing that task.

Methods inherited from class org.springframework.jndi.JndiLocatorSupport

convertJndiName, isResourceRef, lookup, lookup, setResourceRef

Methods inherited from class org.springframework.jndi.JndiAccessor

getJndiEnvironment, getJndiTemplate, setJndiEnvironment, setJndiTemplate

Methods inherited from class java.lang.Object

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

Constructor Detail

WorkManagerTaskExecutor

public WorkManagerTaskExecutor()

Create a new WorkManagerTaskExecutor, expecting bean-style configuration.

See Also:

setWorkManager(javax.resource.spi.work.WorkManager)

WorkManagerTaskExecutor

public WorkManagerTaskExecutor(WorkManager workManager)

Create a new WorkManagerTaskExecutor for the given WorkManager.

Parameters:

workManager - the JCA WorkManager to delegate to

Method Detail

setWorkManager

public void setWorkManager(WorkManager workManager)

Specify the JCA WorkManager instance to delegate to.

setWorkManagerName

public void setWorkManagerName(String workManagerName)

Set the JNDI name of the JCA 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:

setWorkManager(javax.resource.spi.work.WorkManager), JndiLocatorSupport.setResourceRef(boolean)

setBootstrapContext

public void setBootstrapContext(BootstrapContext bootstrapContext)

Specify the JCA BootstrapContext that contains the WorkManager to delegate to.

Specified by:

setBootstrapContext in interface BootstrapContextAware

Parameters:

bootstrapContext - BootstrapContext object to be used by this object

See Also:

InitializingBean.afterPropertiesSet(), ApplicationContextAware.setApplicationContext(org.springframework.context.ApplicationContext)

setBlockUntilStarted

public void setBlockUntilStarted(boolean blockUntilStarted)

Set whether to let execute(java.lang.Runnable) block until the work has been actually started.

Uses the JCA startWork operation underneath, instead of the default scheduleWork.

See Also:

WorkManager.startWork(javax.resource.spi.work.Work), WorkManager.scheduleWork(javax.resource.spi.work.Work)

setBlockUntilCompleted

public void setBlockUntilCompleted(boolean blockUntilCompleted)

Set whether to let execute(java.lang.Runnable) block until the work has been completed.

Uses the JCA doWork operation underneath, instead of the default scheduleWork.

See Also:

WorkManager.doWork(javax.resource.spi.work.Work), WorkManager.scheduleWork(javax.resource.spi.work.Work)

setWorkListener

public void setWorkListener(WorkListener workListener)

Specify a JCA 1.5 WorkListener to apply, if any.

This shared WorkListener instance will be passed on to the WorkManager by all execute(java.lang.Runnable) calls on this TaskExecutor.

afterPropertiesSet

public void afterPropertiesSet()
                        throws NamingException

Description copied from interface: InitializingBean

Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).

This method allows the bean instance to perform initialization only possible when all bean properties have been set and to throw an exception in the event of misconfiguration.

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

NamingException

getDefaultWorkManager

protected WorkManager getDefaultWorkManager()

Obtain a default WorkManager to delegate to. Called if no explicit WorkManager or WorkManager JNDI name has been specified.

The default implementation returns a SimpleTaskWorkManager. Can be overridden in subclasses.

execute

public void execute(Runnable task)

Description copied from interface: TaskExecutor

Execute the given task.

The call might return immediately if the implementation uses an asynchronous execution strategy, or might block in the case of synchronous execution.

Specified by:

execute in interface Executor

Specified by:

execute in interface TaskExecutor

Parameters:

task - the Runnable to execute (never null)

execute

public void execute(Runnable task,
                    long startTimeout)

Description copied from interface: AsyncTaskExecutor

Execute the given task.

Specified by:

execute in interface AsyncTaskExecutor

Parameters:

task - the Runnable to execute (never null)

startTimeout - the time duration (milliseconds) within which the task is supposed to start. This is intended as a hint to the executor, allowing for preferred handling of immediate tasks. Typical values are AsyncTaskExecutor.TIMEOUT_IMMEDIATE or AsyncTaskExecutor.TIMEOUT_INDEFINITE (the default as used by TaskExecutor.execute(Runnable)).

submit

public Future<?> submit(Runnable task)

Description copied from interface: AsyncTaskExecutor

Submit a Runnable task for execution, receiving a Future representing that task. The Future will return a null result upon completion.

Specified by:

submit in interface AsyncTaskExecutor

Parameters:

task - the Runnable to execute (never null)

Returns:

a Future representing pending completion of the task

submit

public <T> Future<T> submit(Callable<T> task)

Description copied from interface: AsyncTaskExecutor

Submit a Callable task for execution, receiving a Future representing that task. The Future will return the Callable's result upon completion.

Specified by:

submit in interface AsyncTaskExecutor

Parameters:

task - the Callable to execute (never null)

Returns:

a Future representing pending completion of the task

prefersShortLivedTasks

public boolean prefersShortLivedTasks()

This task executor prefers short-lived work units.

Specified by:

prefersShortLivedTasks in interface SchedulingTaskExecutor

Returns:

true if this TaskExecutor prefers short-lived tasks

doWork

public void doWork(Work work)
            throws WorkException

Specified by:

doWork in interface WorkManager

Throws:

WorkException

doWork

public void doWork(Work work,
                   long delay,
                   ExecutionContext executionContext,
                   WorkListener workListener)
            throws WorkException

Specified by:

doWork in interface WorkManager

Throws:

WorkException

startWork

public long startWork(Work work)
               throws WorkException

Specified by:

startWork in interface WorkManager

Throws:

WorkException

startWork

public long startWork(Work work,
                      long delay,
                      ExecutionContext executionContext,
                      WorkListener workListener)
               throws WorkException

Specified by:

startWork in interface WorkManager

Throws:

WorkException

scheduleWork

public void scheduleWork(Work work)
                  throws WorkException

Specified by:

scheduleWork in interface WorkManager

Throws:

WorkException

scheduleWork

public void scheduleWork(Work work,
                         long delay,
                         ExecutionContext executionContext,
                         WorkListener workListener)
                  throws WorkException

Specified by:

scheduleWork in interface WorkManager

Throws:

WorkException