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org.activemq.store.cache
Class CacheTopicMessageStore  

java.lang.Object
  org.activemq.store.cache.CacheMessageStore
      org.activemq.store.cache.CacheTopicMessageStore

All Implemented Interfaces:

CacheMessageStoreAware, org.activemq.store.MessageStore, org.activemq.service.Service, org.activemq.store.TopicMessageStore

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public class CacheTopicMessageStore

extends CacheMessageStore

implements org.activemq.store.TopicMessageStore

A MessageStore that uses an in memory cache to speed up getMessage() method calls.

Version:

$Revision: 1.1.1.1 $

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Field Summary
private  org.activemq.store.TopicMessageStore	longTermStore

 

Fields inherited from class org.activemq.store.cache.CacheMessageStore

 

Constructor Summary

CacheTopicMessageStore(CachePersistenceAdapter adapter, org.activemq.store.TopicMessageStore longTermStore, MessageCache cache)

 

Method Summary
void	decrementMessageCountAndMaybeDelete(org.activemq.service.MessageIdentity msgId)           Decrement the reference count of this message ID and if there are no more references then delete the message from persistent store (or maybe archive it off somewhere)
void	deleteSubscription(java.lang.String subcription)
org.activemq.service.MessageIdentity	getLastestMessageIdentity()           Returns the last message identity that was delivered on this container which can then be used as a checkpoint so that when new durable consumers start, we know where to checkpoint their subscriptions.
org.activemq.service.SubscriberEntry	getSubscriberEntry(org.activemq.message.ConsumerInfo info)           Finds the subscriber entry for the given consumer info
void	incrementMessageCount(org.activemq.service.MessageIdentity messageId)           Increments the reference count of the message ID as its been dispatched to another subscriber.
void	recoverSubscription(java.lang.String subscriptionId, org.activemq.service.MessageIdentity lastDispatchedMessage, org.activemq.store.RecoveryListener listener)           For the new subcription find the last acknowledged message ID and then find any new messages since then and dispatch them to the subscription.
void	setLastAcknowledgedMessageIdentity(java.lang.String subscription, org.activemq.service.MessageIdentity messageIdentity)           Stores the last acknowledged messgeID for the given subscription so that we can recover and commence dispatching messages from the last checkpoint
void	setSubscriberEntry(org.activemq.message.ConsumerInfo info, org.activemq.service.SubscriberEntry subscriberEntry)           Inserts or updates the subscriber info due to a subscription change

 

Methods inherited from class org.activemq.store.cache.CacheMessageStore

addMessage, getLongTermStore, getMessage, recover, removeAllMessages, removeMessage, setCacheMessageStore, start, stop

 

Methods inherited from class java.lang.Object

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

 

Methods inherited from interface org.activemq.store.MessageStore

addMessage, getMessage, recover, removeAllMessages, removeMessage

 

Methods inherited from interface org.activemq.service.Service

start, stop

 

Field Detail

longTermStore

private final org.activemq.store.TopicMessageStore longTermStore

Constructor Detail

CacheTopicMessageStore

public CacheTopicMessageStore(CachePersistenceAdapter adapter,
                              org.activemq.store.TopicMessageStore longTermStore,
                              MessageCache cache)

Method Detail

setLastAcknowledgedMessageIdentity

public void setLastAcknowledgedMessageIdentity(java.lang.String subscription,
                                               org.activemq.service.MessageIdentity messageIdentity)
                                        throws javax.jms.JMSException

Description copied from interface: org.activemq.store.TopicMessageStore

Stores the last acknowledged messgeID for the given subscription so that we can recover and commence dispatching messages from the last checkpoint

Specified by:

setLastAcknowledgedMessageIdentity in interface org.activemq.store.TopicMessageStore

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getLastestMessageIdentity

public org.activemq.service.MessageIdentity getLastestMessageIdentity()
                                                               throws javax.jms.JMSException

Description copied from interface: org.activemq.store.TopicMessageStore

Returns the last message identity that was delivered on this container which can then be used as a checkpoint so that when new durable consumers start, we know where to checkpoint their subscriptions.

Note that this method does not need to return a valid messageID, purely the sequence number.

Specified by:

getLastestMessageIdentity in interface org.activemq.store.TopicMessageStore

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recoverSubscription

public void recoverSubscription(java.lang.String subscriptionId,
                                org.activemq.service.MessageIdentity lastDispatchedMessage,
                                org.activemq.store.RecoveryListener listener)
                         throws javax.jms.JMSException

Description copied from interface: org.activemq.store.TopicMessageStore

For the new subcription find the last acknowledged message ID and then find any new messages since then and dispatch them to the subscription.

If this is a new subscription then the lastDispatchMessage should be written to the acknowledgement table to write a checkpoint so that when we recover we will start from the correct point.

e.g. if we dispatched some messages to a new durable topic subscriber, then went down before acknowledging any messages, we need to know the correct point from which to recover from.

Specified by:

recoverSubscription in interface org.activemq.store.TopicMessageStore

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setSubscriberEntry

public void setSubscriberEntry(org.activemq.message.ConsumerInfo info,
                               org.activemq.service.SubscriberEntry subscriberEntry)
                        throws javax.jms.JMSException

Description copied from interface: org.activemq.store.TopicMessageStore

Inserts or updates the subscriber info due to a subscription change

Specified by:

setSubscriberEntry in interface org.activemq.store.TopicMessageStore

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getSubscriberEntry

public org.activemq.service.SubscriberEntry getSubscriberEntry(org.activemq.message.ConsumerInfo info)
                                                        throws javax.jms.JMSException

Description copied from interface: org.activemq.store.TopicMessageStore

Finds the subscriber entry for the given consumer info

Specified by:

getSubscriberEntry in interface org.activemq.store.TopicMessageStore

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incrementMessageCount

public void incrementMessageCount(org.activemq.service.MessageIdentity messageId)
                           throws javax.jms.JMSException

Description copied from interface: org.activemq.store.TopicMessageStore

Increments the reference count of the message ID as its been dispatched to another subscriber.

Specified by:

incrementMessageCount in interface org.activemq.store.TopicMessageStore

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decrementMessageCountAndMaybeDelete

public void decrementMessageCountAndMaybeDelete(org.activemq.service.MessageIdentity msgId)
                                         throws javax.jms.JMSException

Description copied from interface: org.activemq.store.TopicMessageStore

Decrement the reference count of this message ID and if there are no more references then delete the message from persistent store (or maybe archive it off somewhere)

Specified by:

decrementMessageCountAndMaybeDelete in interface org.activemq.store.TopicMessageStore

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deleteSubscription

public void deleteSubscription(java.lang.String subcription)
                        throws javax.jms.JMSException

Specified by:

deleteSubscription in interface org.activemq.store.TopicMessageStore

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> activemq >> store >> [ cache overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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