org.apache.camel.support.cache

Class PollingConsumerServicePool

java.lang.Object

org.apache.camel.support.service.BaseService

org.apache.camel.support.service.ServiceSupport

org.apache.camel.support.cache.PollingConsumerServicePool

All Implemented Interfaces:

AutoCloseable, org.apache.camel.NonManagedService, org.apache.camel.Service, org.apache.camel.ShutdownableService, org.apache.camel.StatefulService, org.apache.camel.SuspendableService

public class PollingConsumerServicePool
extends org.apache.camel.support.service.ServiceSupport

PollingConsumer pool.

Field Summary

Fields inherited from class org.apache.camel.support.service.BaseService

BUILT, FAILED, INITIALIZED, INITIALIZING, lock, NEW, SHUTDOWN, SHUTTING_DOWN, STARTED, STARTING, status, STOPPED, STOPPING, SUSPENDED, SUSPENDING

Constructor Summary

Constructors

Constructor and Description
PollingConsumerServicePool(org.apache.camel.util.function.ThrowingFunction<org.apache.camel.Endpoint,org.apache.camel.PollingConsumer,Exception> creator, Function<org.apache.camel.PollingConsumer,org.apache.camel.Endpoint> getEndpoint, int capacity)

Method Summary

Modifier and Type	Method and Description
S	acquire(org.apache.camel.Endpoint endpoint) Tries to acquire the producer/consumer with the given key
void	cleanUp() Cleanup the pool (removing stale instances that should be evicted)
protected void	doBuild()
protected void	doStart()
protected void	doStop()
protected void	onEvict(S s) This callback is invoked by LRUCache from a separate background cleanup thread.
void	release(org.apache.camel.Endpoint endpoint, S s) Releases the producer/consumer back to the pool
int	size() Returns the current size of the pool

Methods inherited from class org.apache.camel.support.service.BaseService

build, doFail, doInit, doLifecycleChange, doResume, doShutdown, doSuspend, fail, getStatus, init, isBuild, isInit, isNew, isRunAllowed, isShutdown, isStarted, isStarting, isStartingOrStarted, isStopped, isStopping, isStoppingOrStopped, isSuspended, isSuspending, isSuspendingOrSuspended, resume, shutdown, start, stop, suspend

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.camel.StatefulService

getStatus, isRunAllowed, isStarted, isStarting, isStopped, isStopping, isSuspending

Methods inherited from interface org.apache.camel.SuspendableService

isSuspended, resume, suspend

Methods inherited from interface org.apache.camel.ShutdownableService

shutdown

Methods inherited from interface org.apache.camel.Service

build, close, init, start, stop

Constructor Detail

PollingConsumerServicePool

public PollingConsumerServicePool(org.apache.camel.util.function.ThrowingFunction<org.apache.camel.Endpoint,org.apache.camel.PollingConsumer,Exception> creator,
                                  Function<org.apache.camel.PollingConsumer,org.apache.camel.Endpoint> getEndpoint,
                                  int capacity)

Method Detail

onEvict

protected void onEvict(S s)

This callback is invoked by LRUCache from a separate background cleanup thread. Therefore we mark the entries to be evicted from this thread only, and then let SinglePool and MultiPool handle the evictions (stop the producer/consumer safely) when they are acquiring/releases producers/consumers. If we sop the producer/consumer from the LRUCache background thread we can have a race condition with a pooled producer may have been acquired at the same time its being evicted.

acquire

public S acquire(org.apache.camel.Endpoint endpoint)
          throws Exception

Tries to acquire the producer/consumer with the given key

Parameters:

endpoint - the endpoint

Returns:

the acquired producer/consumer

Throws:

Exception

release

public void release(org.apache.camel.Endpoint endpoint,
                    S s)

Releases the producer/consumer back to the pool

Parameters:

endpoint - the endpoint

s - the producer/consumer

size

public int size()

Returns the current size of the pool

cleanUp

public void cleanUp()

Cleanup the pool (removing stale instances that should be evicted)

doBuild

protected void doBuild()
                throws Exception

Overrides:

doBuild in class org.apache.camel.support.service.BaseService

Throws:

Exception

doStart

protected void doStart()
                throws Exception

Overrides:

doStart in class org.apache.camel.support.service.BaseService

Throws:

Exception

doStop

protected void doStop()
               throws Exception

Overrides:

doStop in class org.apache.camel.support.service.BaseService

Throws:

Exception