org.apache.activemq.broker.region
Class QueueSubscription

java.lang.Object
  org.apache.activemq.broker.region.AbstractSubscription
      org.apache.activemq.broker.region.PrefetchSubscription
          org.apache.activemq.broker.region.QueueSubscription

All Implemented Interfaces:

LockOwner, Subscription, SubscriptionRecovery

Direct Known Subclasses:

QueueBrowserSubscription

public class QueueSubscription
extends PrefetchSubscription
implements LockOwner

Field Summary

Fields inherited from class org.apache.activemq.broker.region.PrefetchSubscription

dequeueCounter, dispatchCounter, dispatched, dispatchLock, enqueueCounter, pending, pendingLock, prefetchExtension, scheduler, usageManager, usePrefetchExtension

Fields inherited from class org.apache.activemq.broker.region.AbstractSubscription

broker, context, destinationFilter, destinations, info

Fields inherited from interface org.apache.activemq.broker.region.LockOwner

HIGH_PRIORITY_LOCK_OWNER

Constructor Summary

QueueSubscription(Broker broker, SystemUsage usageManager, ConnectionContext context, ConsumerInfo info)

Method Summary

protected void	acknowledge(ConnectionContext context, MessageAck ack, MessageReference n) In the queue case, mark the node as dropped and then a gc cycle will remove it from the queue.
protected boolean	canDispatch(MessageReference n) Use when a matched message is about to be dispatched to the client.
void	destroy() Called when the subscription is destroyed.
int	getLockPriority()
protected boolean	isDropped(MessageReference node)
boolean	isLockExclusive()
String	toString()

Methods inherited from class org.apache.activemq.broker.region.PrefetchSubscription

acknowledge, add, add, assertAckMatchesDispatched, countBeforeFull, createMessageDispatch, dispatch, dispatchPending, getDequeueCounter, getDispatchedCounter, getDispatchedQueueSize, getEnqueueCounter, getInFlightSize, getMaxAuditDepth, getMaxProducersToAudit, getPending, getPendingQueueSize, getPrefetchExtension, isFull, isHighWaterMark, isLowWaterMark, isRecoveryRequired, isUsePrefetchExtension, onDispatch, processMessageDispatchNotification, pullMessage, remove, remove, sendToDLQ, setMaxAuditDepth, setMaxProducersToAudit, setPending, setPendingBatchSize, setPrefetchSize, setUsePrefetchExtension, updateConsumerPrefetch

Methods inherited from class org.apache.activemq.broker.region.AbstractSubscription

addDestination, addRecoveredMessage, doAddRecoveredMessage, gc, getActiveMQDestination, getConsumerInfo, getContext, getCursorMemoryHighWaterMark, getInFlightUsage, getInfo, getObjectName, getPrefetchSize, getSelector, getSelectorExpression, getTimeOfLastMessageAck, isBrowser, isSlowConsumer, matches, matches, removeDestination, setCursorMemoryHighWaterMark, setObjectName, setSelector, setSlowConsumer, setTimeOfLastMessageAck, unmatched

Methods inherited from class java.lang.Object

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

Constructor Detail

QueueSubscription

public QueueSubscription(Broker broker,
                         SystemUsage usageManager,
                         ConnectionContext context,
                         ConsumerInfo info)
                  throws javax.jms.JMSException

Throws:

javax.jms.JMSException

Method Detail

acknowledge

protected void acknowledge(ConnectionContext context,
                           MessageAck ack,
                           MessageReference n)
                    throws IOException

In the queue case, mark the node as dropped and then a gc cycle will remove it from the queue.

Specified by:

acknowledge in class PrefetchSubscription

Throws:

IOException

canDispatch

protected boolean canDispatch(MessageReference n)
                       throws IOException

Description copied from class: PrefetchSubscription

Use when a matched message is about to be dispatched to the client.

Specified by:

canDispatch in class PrefetchSubscription

Returns:

false if the message should not be dispatched to the client (another sub may have already dispatched it for example).

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object

getLockPriority

public int getLockPriority()

Specified by:

getLockPriority in interface LockOwner

isLockExclusive

public boolean isLockExclusive()

Specified by:

isLockExclusive in interface LockOwner

destroy

public void destroy()

Description copied from interface: Subscription

Called when the subscription is destroyed.

Specified by:

destroy in interface Subscription

isDropped

protected boolean isDropped(MessageReference node)

Specified by:

isDropped in class PrefetchSubscription