Class SubQueueSelectorCacheBroker

java.lang.Object

org.apache.activemq.broker.BrokerFilter

org.apache.activemq.plugin.SubQueueSelectorCacheBroker

All Implemented Interfaces:

Runnable, Broker, Region, org.apache.activemq.Service

public class SubQueueSelectorCacheBroker
extends BrokerFilter
implements 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 Refer to: 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

Modifier and Type	Field	Description
static final String	MATCH_EVERYTHING
static final long	MAX_PERSIST_INTERVAL

Fields inherited from class BrokerFilter

next

Constructor Summary

Constructors

Constructor	Description
SubQueueSelectorCacheBroker(Broker next, File persistFile)	Constructor

Method Summary

Modifier and Type	Method	Description
Subscription	addConsumer(ConnectionContext context, org.apache.activemq.command.ConsumerInfo info)	Adds a consumer.
boolean	deleteAllSelectorsForDestination(String destinationName)
boolean	deleteSelectorForDestination(String destinationName, String selector)
long	getPersistInterval()
Set<String>	getSelectorsForDestination(String destinationName)
boolean	isIgnoreWildcardSelectors()
boolean	isSingleSelectorPerDestination()
void	removeConsumer(ConnectionContext context, org.apache.activemq.command.ConsumerInfo info)	Removes a consumer.
void	run()	Persist the selector cache every MAX_PERSIST_INTERVALms.
void	setIgnoreWildcardSelectors(boolean ignoreWildcardSelectors)
void	setPersistInterval(long persistInterval)
void	setSingleSelectorPerDestination(boolean singleSelectorPerDestination)
void	stop()

Methods inherited from class BrokerFilter

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

Methods inherited from class Object

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

Field Details

MATCH_EVERYTHING

public static final String MATCH_EVERYTHING

See Also:

• Constant Field Values

MAX_PERSIST_INTERVAL

public static final long MAX_PERSIST_INTERVAL

See Also:

• Constant Field Values

Constructor Details

SubQueueSelectorCacheBroker

public SubQueueSelectorCacheBroker(Broker next,
 File persistFile)

Constructor

Method Details

stop

public void stop()
          throws Exception

Specified by:

stop in interface org.apache.activemq.Service

Overrides:

stop in class BrokerFilter

Throws:

Exception

addConsumer

public Subscription addConsumer(ConnectionContext context,
 org.apache.activemq.command.ConsumerInfo info)
                         throws 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:

Exception - TODO

removeConsumer

public void removeConsumer(ConnectionContext context,
 org.apache.activemq.command.ConsumerInfo info)
                    throws Exception

Description copied from interface: Region

Removes a consumer.

Specified by:

removeConsumer in interface Region

Overrides:

removeConsumer in class BrokerFilter

Parameters:

context - the environment the operation is being executed under.

Throws:

Exception - TODO

run

public void run()

Persist the selector cache every MAX_PERSIST_INTERVALms.

Specified by:

run in interface Runnable

See Also:

• Runnable.run()

isSingleSelectorPerDestination

public boolean isSingleSelectorPerDestination()

setSingleSelectorPerDestination

public void setSingleSelectorPerDestination(boolean singleSelectorPerDestination)

getSelectorsForDestination

public Set<String> getSelectorsForDestination(String destinationName)

getPersistInterval

public long getPersistInterval()

setPersistInterval

public void setPersistInterval(long persistInterval)

deleteSelectorForDestination

public boolean deleteSelectorForDestination(String destinationName,
 String selector)

deleteAllSelectorsForDestination

public boolean deleteAllSelectorsForDestination(String destinationName)

isIgnoreWildcardSelectors

public boolean isIgnoreWildcardSelectors()

setIgnoreWildcardSelectors

public void setIgnoreWildcardSelectors(boolean ignoreWildcardSelectors)