Class QueueLoadBalancer

  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)


Field Summary
Fields inherited from class org.apache.camel.processor.loadbalancer.LoadBalancerSupport
Constructor Summary
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


public QueueLoadBalancer()
Method Detail


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.

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.
(doneSync) true to continue execute synchronously, false to continue being executed asynchronously
See Also:
AsyncProcessorHelper.process(AsyncProcessor, Exchange, AsyncCallback)


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

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


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

Apache CAMEL