org.apache.camel.processor
Class DelayProcessorSupport

java.lang.Object
  org.apache.camel.support.ServiceSupport
      org.apache.camel.processor.DelegateAsyncProcessor
          org.apache.camel.processor.DelayProcessorSupport

All Implemented Interfaces:

AsyncProcessor, DelegateProcessor, Navigate<Processor>, Processor, Service, ShutdownableService, StatefulService, SuspendableService

Direct Known Subclasses:

Delayer, DelayInterceptor, Throttler

public abstract class DelayProcessorSupport
extends DelegateAsyncProcessor

A useful base class for any processor which provides some kind of throttling or delayed processing.

This implementation will block while waiting.

Version:

Field Summary

protected org.slf4j.Logger

log

Fields inherited from class org.apache.camel.processor.DelegateAsyncProcessor

processor

Fields inherited from class org.apache.camel.support.ServiceSupport

shutdown, shuttingdown, started, starting, stopped, stopping, suspended, suspending

Constructor Summary

DelayProcessorSupport(CamelContext camelContext, Processor processor)

DelayProcessorSupport(CamelContext camelContext, Processor processor, ScheduledExecutorService executorService, boolean shutdownExecutorService)

Method Summary

protected abstract long	calculateDelay(Exchange exchange)
protected long	currentSystemTime()
protected void	delay(long delay, Exchange exchange) Delays the given time before continuing.
protected void	doShutdown() Implementations override this method to perform customized shutdown.
protected void	doStart() Implementations override this method to support customized start/stop.
int	getDelayedCount() Gets the current number of Exchanges being delayed (hold back due throttle limit hit)
protected void	handleSleepInterruptedException(InterruptedException e, Exchange exchange) Called when a sleep is interrupted; allows derived classes to handle this case differently
boolean	isAsyncDelayed()
boolean	isCallerRunsWhenRejected()
boolean	process(Exchange exchange, AsyncCallback callback) Processes the message exchange.
protected boolean	processDelay(Exchange exchange, AsyncCallback callback, long delay)
void	setAsyncDelayed(boolean asyncDelayed)
void	setCallerRunsWhenRejected(boolean callerRunsWhenRejected)

Methods inherited from class org.apache.camel.processor.DelegateAsyncProcessor

doStop, getProcessor, hasNext, next, process, processNext, setProcessor, setProcessor, toString

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

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

Methods inherited from class java.lang.Object

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

Field Detail

log

protected final org.slf4j.Logger log

Constructor Detail

DelayProcessorSupport

public DelayProcessorSupport(CamelContext camelContext,
                             Processor processor)

DelayProcessorSupport

public DelayProcessorSupport(CamelContext camelContext,
                             Processor processor,
                             ScheduledExecutorService executorService,
                             boolean shutdownExecutorService)

Method Detail

processDelay

protected boolean processDelay(Exchange exchange,
                               AsyncCallback callback,
                               long delay)

process

public boolean process(Exchange exchange,
                       AsyncCallback callback)

Description copied from interface: AsyncProcessor

Processes the message exchange. Similar to Processor.process(org.apache.camel.Exchange), but the caller supports having the exchange asynchronously processed.

If there was a failure processing then the caused Exception would be set on the Exchange.

Specified by:

process in interface AsyncProcessor

Overrides:

process in class DelegateAsyncProcessor

Parameters:

exchange - the message exchange

callback - the AsyncCallback will be invoked when the processing of the exchange is completed. If the exchange is completed synchronously, then the callback is also invoked synchronously. The callback should therefore be careful of starting recursive loop.

Returns:

(doneSync) true to continue execute synchronously, false to continue being executed asynchronously

isAsyncDelayed

public boolean isAsyncDelayed()

setAsyncDelayed

public void setAsyncDelayed(boolean asyncDelayed)

isCallerRunsWhenRejected

public boolean isCallerRunsWhenRejected()

setCallerRunsWhenRejected

public void setCallerRunsWhenRejected(boolean callerRunsWhenRejected)

calculateDelay

protected abstract long calculateDelay(Exchange exchange)

getDelayedCount

public int getDelayedCount()

Gets the current number of Exchanges being delayed (hold back due throttle limit hit)

delay

protected void delay(long delay,
                     Exchange exchange)
              throws InterruptedException

Delays the given time before continuing.

This implementation will block while waiting

Parameters:

delay - the delay time in millis

exchange - the exchange being processed

Throws:

InterruptedException

handleSleepInterruptedException

protected void handleSleepInterruptedException(InterruptedException e,
                                               Exchange exchange)
                                        throws InterruptedException

Called when a sleep is interrupted; allows derived classes to handle this case differently

Throws:

InterruptedException

currentSystemTime

protected long currentSystemTime()

doStart

protected void doStart()
                throws Exception

Description copied from class: ServiceSupport

Implementations override this method to support customized start/stop.

Important: See ServiceSupport.doStop() for more details.

Overrides:

doStart in class DelegateAsyncProcessor

Throws:

Exception

See Also:

ServiceSupport.doStop()

doShutdown

protected void doShutdown()
                   throws Exception

Description copied from class: ServiceSupport

Implementations override this method to perform customized shutdown.

Overrides:

doShutdown in class ServiceSupport

Throws:

Exception