org.apache.camel.component.kestrel

Class KestrelConsumer

java.lang.Object

org.apache.camel.support.ServiceSupport

org.apache.camel.impl.DefaultConsumer

org.apache.camel.component.kestrel.KestrelConsumer

All Implemented Interfaces:

Consumer, EndpointAware, RouteAware, Service, ShutdownableService, ShutdownAware, ShutdownPrepared, StatefulService, SuspendableService

public class KestrelConsumer
extends DefaultConsumer
implements ShutdownAware

A Camel consumer that polls a kestrel queue.

Field Summary

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

log

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

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

Constructor Summary

Constructors

Constructor and Description
KestrelConsumer(KestrelEndpoint endpoint, Processor processor, net.spy.memcached.MemcachedClient memcachedClient)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	deferShutdown(ShutdownRunningTask shutdownRunningTask) To defer shutdown during first phase of shutdown.
protected void	doStart() Implementations override this method to support customized start/stop.
protected void	doStop() Implementations override this method to support customized start/stop.
int	getPendingExchangesSize() Gets the number of pending exchanges.
void	prepareShutdown(boolean forced) Prepares for shutdown.

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

createUoW, doneUoW, getAsyncProcessor, getEndpoint, getExceptionHandler, getProcessor, getRoute, handleException, handleException, setExceptionHandler, setRoute, toString

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

doResume, doShutdown, 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

Methods inherited from interface org.apache.camel.Service

start, stop

Constructor Detail

KestrelConsumer

public KestrelConsumer(KestrelEndpoint endpoint,
               Processor processor,
               net.spy.memcached.MemcachedClient memcachedClient)

Method Detail

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 DefaultConsumer

Throws:

Exception

See Also:

ServiceSupport.doStop()

doStop

protected void doStop()
               throws Exception

Description copied from class: ServiceSupport

Implementations override this method to support customized start/stop.

Important: Camel will invoke this ServiceSupport.doStop() method when the service is being stopped. This method will also be invoked if the service is still in uninitialized state (eg has not been started). The method is always called to allow the service to do custom logic when the service is being stopped, such as when CamelContext is shutting down.

Overrides:

doStop in class DefaultConsumer

Throws:

Exception

See Also:

ServiceSupport.doStart()

deferShutdown

public boolean deferShutdown(ShutdownRunningTask shutdownRunningTask)

Description copied from interface: ShutdownAware

To defer shutdown during first phase of shutdown. This allows any pending exchanges to be completed and therefore ensure a graceful shutdown without loosing messages. At the very end when there are no more inflight and pending messages the consumer could then safely be shutdown.

This is needed by SedaConsumer.

Specified by:

deferShutdown in interface ShutdownAware

Parameters:

shutdownRunningTask - the configured option for how to act when shutting down running tasks.

Returns:

true to defer shutdown to very last.

getPendingExchangesSize

public int getPendingExchangesSize()

Description copied from interface: ShutdownAware

Gets the number of pending exchanges.

Some consumers has internal queues with Exchange which are pending. For example the SedaConsumer.

Return zero to indicate no pending exchanges and therefore ready to shutdown.

Specified by:

getPendingExchangesSize in interface ShutdownAware

Returns:

number of pending exchanges

prepareShutdown

public void prepareShutdown(boolean forced)

Description copied from interface: ShutdownPrepared

Prepares for shutdown.

The ShutdownStrategy supports preparing for shutdown using two steps. First a regular preparation, where the given forced parameter will be false. And if the shutdown times out, then the ShutdownStrategy performs a more aggressive shutdown, calling this method a second time with true for the given forced parameter.

For example by graceful stopping any threads or the likes.

For forced shutdown, then the service is expected to aggressively shutdown any child services, such as thread pools etc. This is the last chance it has to perform such duties.

Specified by:

prepareShutdown in interface ShutdownPrepared

Parameters:

forced - true is forcing a more aggressive shutdown, false is for preparing to shutdown.