org.apache.camel.processor.loadbalancer
Class QueueLoadBalancer

java.lang.Object
  extended by org.apache.camel.impl.ServiceSupport
      extended by org.apache.camel.processor.loadbalancer.LoadBalancerSupport
          extended by org.apache.camel.processor.loadbalancer.QueueLoadBalancer
All Implemented Interfaces:
AsyncProcessor, Navigate<Processor>, Processor, LoadBalancer, Service, ShutdownableService
Direct Known Subclasses:
RandomLoadBalancer, RoundRobinLoadBalancer, StickyLoadBalancer, WeightedLoadBalancer

public abstract class QueueLoadBalancer
extends LoadBalancerSupport

A base class for LoadBalancer implementations which choose a single destination for each exchange (rather like JMS Queues)

Version:
$Revision: 20640 $

Field Summary
 
Fields inherited from class org.apache.camel.processor.loadbalancer.LoadBalancerSupport
log
 
Constructor Summary
QueueLoadBalancer()
           
 
Method Summary
protected abstract  Processor chooseProcessor(List<Processor> processors, Exchange exchange)
           
 void process(Exchange exchange)
          Processes the message exchange
 boolean process(Exchange exchange, AsyncCallback callback)
          Processes the message exchange.
 
Methods inherited from class org.apache.camel.processor.loadbalancer.LoadBalancerSupport
addProcessor, doStart, doStop, getProcessors, hasNext, next, removeProcessor
 
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, toString, wait, wait, wait
 

Constructor Detail

QueueLoadBalancer

public QueueLoadBalancer()
Method Detail

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.

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
See Also:
AsyncProcessorHelper.process(AsyncProcessor, Exchange, AsyncCallback)

process

public void process(Exchange exchange)
             throws Exception
Description copied from interface: Processor
Processes the message exchange

Specified by:
process in interface Processor
Overrides:
process in class LoadBalancerSupport
Parameters:
exchange - the message exchange
Throws:
Exception - if an internal processing error has occurred.

chooseProcessor

protected abstract Processor chooseProcessor(List<Processor> processors,
                                             Exchange exchange)


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