org.apache.camel.impl
Class EventDrivenPollingConsumer

java.lang.Object
  org.apache.camel.impl.ServiceSupport
      org.apache.camel.impl.PollingConsumerSupport
          org.apache.camel.impl.EventDrivenPollingConsumer

All Implemented Interfaces:

Consumer, PollingConsumer, Processor, Service, ShutdownableService

public class EventDrivenPollingConsumer
extends PollingConsumerSupport
implements Processor

A default implementation of the PollingConsumer which uses the normal asynchronous consumer mechanism along with a BlockingQueue to allow the caller to pull messages on demand.

Version:

Field Summary

Fields inherited from class org.apache.camel.impl.PollingConsumerSupport

log

Constructor Summary

EventDrivenPollingConsumer(Endpoint endpoint)

EventDrivenPollingConsumer(Endpoint endpoint, BlockingQueue<Exchange> queue)

Method Summary

protected void	afterPoll()
protected long	beforePoll(long timeout)
protected void	doStart()
protected void	doStop()
ExceptionHandler	getInterruptedExceptionHandler()
protected void	handleInterruptedException(InterruptedException e)
void	process(Exchange exchange) Processes the message exchange
Exchange	receive() Waits until a message is available and then returns it.
Exchange	receive(long timeout) Attempts to receive a message exchange, waiting up to the given timeout to expire if a message is not yet available
Exchange	receiveNoWait() Attempts to receive a message exchange immediately without waiting and returning null if a message exchange is not available yet.
void	setInterruptedExceptionHandler(ExceptionHandler interruptedExceptionHandler)

Methods inherited from class org.apache.camel.impl.PollingConsumerSupport

getEndpoint, getExceptionHandler, handleException, setExceptionHandler, toString

Methods inherited from class org.apache.camel.impl.ServiceSupport

addChildService, doResume, doShutdown, doSuspend, getStatus, getVersion, isRunAllowed, isStarted, isStarting, isStopped, isStopping, isSuspended, isSuspending, removeChildService, resume, shutdown, start, start, stop, suspend

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.camel.Service

start, stop

Constructor Detail

EventDrivenPollingConsumer

public EventDrivenPollingConsumer(Endpoint endpoint)

EventDrivenPollingConsumer

public EventDrivenPollingConsumer(Endpoint endpoint,
                                  BlockingQueue<Exchange> queue)

Method Detail

receiveNoWait

public Exchange receiveNoWait()

Description copied from interface: PollingConsumer

Attempts to receive a message exchange immediately without waiting and returning null if a message exchange is not available yet.

Specified by:

receiveNoWait in interface PollingConsumer

Returns:

the message exchange if one is immediately available otherwise null

receive

public Exchange receive()

Description copied from interface: PollingConsumer

Waits until a message is available and then returns it. Warning that this method could block indefinitely if no messages are available.

Will return null if the consumer is not started

Specified by:

receive in interface PollingConsumer

Returns:

the message exchange received.

receive

public Exchange receive(long timeout)

Description copied from interface: PollingConsumer

Attempts to receive a message exchange, waiting up to the given timeout to expire if a message is not yet available

Specified by:

receive in interface PollingConsumer

Parameters:

timeout - the amount of time in milliseconds to wait for a message before timing out and returning null

Returns:

the message exchange if one iwas available within the timeout period, or null if the timeout expired

process

public void process(Exchange exchange)
             throws Exception

Description copied from interface: Processor

Processes the message exchange

Specified by:

process in interface Processor

Parameters:

exchange - the message exchange

Throws:

Exception - if an internal processing error has occurred.

getInterruptedExceptionHandler

public ExceptionHandler getInterruptedExceptionHandler()

setInterruptedExceptionHandler

public void setInterruptedExceptionHandler(ExceptionHandler interruptedExceptionHandler)

handleInterruptedException

protected void handleInterruptedException(InterruptedException e)

beforePoll

protected long beforePoll(long timeout)

afterPoll

protected void afterPoll()

doStart

protected void doStart()
                throws Exception

Specified by:

doStart in class ServiceSupport

Throws:

Exception

doStop

protected void doStop()
               throws Exception

Specified by:

doStop in class ServiceSupport

Throws:

Exception