org.apache.activemq.plugin
Class SubQueueSelectorCacheBroker

java.lang.Object
  org.apache.activemq.broker.BrokerFilter
      org.apache.activemq.plugin.SubQueueSelectorCacheBroker

All Implemented Interfaces:

java.lang.Runnable, Broker, Region, Service

public class SubQueueSelectorCacheBroker
extends BrokerFilter
implements java.lang.Runnable

A plugin which allows the caching of the selector from a subscription queue.

This stops the build-up of unwanted messages, especially when consumers may disconnect from time to time when using virtual destinations.

This is influenced by code snippets developed by Maciej Rakowicz

Author:

Roelof Naude roelof(dot)naude(at)gmail.com

See Also:

https://issues.apache.org/activemq/browse/AMQ-3004, http://mail-archives.apache.org/mod_mbox/activemq-users/201011.mbox/%3C8A013711-2613-450A-A487-379E784AF1D6@homeaway.co.uk%3E

Field Summary

Fields inherited from class org.apache.activemq.broker.BrokerFilter

next

Constructor Summary

SubQueueSelectorCacheBroker(Broker next, java.io.File persistFile)
Constructor

Method Summary

Subscription	addConsumer(ConnectionContext context, ConsumerInfo info) Adds a consumer.
java.lang.String	getSelector(java.lang.String destination)
void	run() Persist the selector cache every MAX_PERSIST_INTERVALms.
void	stop()

Methods inherited from class org.apache.activemq.broker.BrokerFilter

acknowledge, addBroker, addConnection, addDestination, addDestinationInfo, addProducer, addSession, beginTransaction, brokerServiceStarted, commitTransaction, fastProducer, forgetTransaction, gc, getAdaptor, getAdminConnectionContext, getBrokerId, getBrokerName, getBrokerSequenceId, getBrokerService, getClients, getDestinationMap, getDestinations, getDestinations, getDurableDestinations, getExecutor, getPeerBrokerInfos, getPreparedTransactions, getRoot, getScheduler, getTempDataStore, getVmConnectorURI, isExpired, isFaultTolerantConfiguration, isFull, isStopped, messageConsumed, messageDelivered, messageDiscarded, messageExpired, messagePull, networkBridgeStarted, networkBridgeStopped, nowMasterBroker, postProcessDispatch, prepareTransaction, preProcessDispatch, processConsumerControl, processDispatchNotification, removeBroker, removeConnection, removeConsumer, removeDestination, removeDestinationInfo, removeProducer, removeSession, removeSubscription, rollbackTransaction, send, sendToDeadLetterQueue, setAdminConnectionContext, slowConsumer, start

Methods inherited from class java.lang.Object

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

Constructor Detail

SubQueueSelectorCacheBroker

public SubQueueSelectorCacheBroker(Broker next,
                                   java.io.File persistFile)

Constructor

Method Detail

stop

public void stop()
          throws java.lang.Exception

Specified by:

stop in interface Service

Overrides:

stop in class BrokerFilter

Throws:

java.lang.Exception

addConsumer

public Subscription addConsumer(ConnectionContext context,
                                ConsumerInfo info)
                         throws java.lang.Exception

Description copied from interface: Region

Adds a consumer.

Specified by:

addConsumer in interface Region

Overrides:

addConsumer in class BrokerFilter

Parameters:

context - the environment the operation is being executed under.

Returns:

TODO

Throws:

java.lang.Exception - TODO

getSelector

public java.lang.String getSelector(java.lang.String destination)

Returns:

The JMS selector for the specified destination

run

public void run()

Persist the selector cache every MAX_PERSIST_INTERVALms.

Specified by:

run in interface java.lang.Runnable

See Also:

Runnable.run()