org.apache.activemq.store.memory
Class MemoryTopicMessageStore

java.lang.Object
  extended by org.apache.activemq.store.AbstractMessageStore
      extended by org.apache.activemq.store.memory.MemoryMessageStore
          extended by org.apache.activemq.store.memory.MemoryTopicMessageStore
All Implemented Interfaces:
Service, MessageStore, TopicMessageStore

public class MemoryTopicMessageStore
extends MemoryMessageStore
implements TopicMessageStore


Field Summary
 
Fields inherited from class org.apache.activemq.store.memory.MemoryMessageStore
lastBatchId, messageTable
 
Fields inherited from class org.apache.activemq.store.AbstractMessageStore
destination, FUTURE, prioritizedMessages
 
Constructor Summary
MemoryTopicMessageStore(ActiveMQDestination destination)
           
MemoryTopicMessageStore(ActiveMQDestination destination, Map<MessageId,Message> messageTable, Map<SubscriptionKey,SubscriptionInfo> subscriberDatabase)
           
 
Method Summary
 void acknowledge(ConnectionContext context, String clientId, String subscriptionName, MessageId messageId, MessageAck ack)
          Stores the last acknowledged messgeID for the given subscription so that we can recover and commence dispatching messages from the last checkpoint
 void addMessage(ConnectionContext context, Message message)
          Adds a message to the message store
 void addSubsciption(SubscriptionInfo info, boolean retroactive)
          Inserts the subscriber info due to a subscription change

If this is a new subscription and the retroactive is false, then the last message sent to the topic should be set as the last message acknowledged by they new subscription.

 void delete()
           
 void deleteSubscription(String clientId, String subscriptionName)
           
 SubscriptionInfo[] getAllSubscriptions()
          Lists all the durable subscriptions for a given destination.
 int getMessageCount(String clientId, String subscriberName)
          Get the number of messages ready to deliver from the store to a durable subscriber
 SubscriptionInfo lookupSubscription(String clientId, String subscriptionName)
          Finds the subscriber entry for the given consumer info
protected static Map<SubscriptionKey,org.apache.activemq.store.memory.MemoryTopicSub> makeSubMap()
           
protected static Map<SubscriptionKey,SubscriptionInfo> makeSubscriptionInfoMap()
           
 void recoverNextMessages(String clientId, String subscriptionName, int maxReturned, MessageRecoveryListener listener)
          For an active subscription - retrieve messages from the store for the subscriber after the lastMessageId messageId

 void recoverSubscription(String clientId, String subscriptionName, MessageRecoveryListener listener)
          For the new subscription find the last acknowledged message ID and then find any new messages since then and dispatch them to the subscription.
 void resetBatching(String clientId, String subscriptionName)
          A hint to the Store to reset any batching state for a durable subscriber
 
Methods inherited from class org.apache.activemq.store.memory.MemoryMessageStore
getMessage, getMessageCount, recover, recoverNextMessages, removeAllMessages, removeMessage, removeMessage, resetBatching, setBatch
 
Methods inherited from class org.apache.activemq.store.AbstractMessageStore
addMessage, asyncAddQueueMessage, asyncAddQueueMessage, asyncAddTopicMessage, asyncAddTopicMessage, dispose, getDestination, isEmpty, isPrioritizedMessages, removeAsyncMessage, setMemoryUsage, setPrioritizedMessages, 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.apache.activemq.store.MessageStore
addMessage, asyncAddQueueMessage, asyncAddQueueMessage, asyncAddTopicMessage, asyncAddTopicMessage, dispose, getDestination, getMessage, getMessageCount, isEmpty, isPrioritizedMessages, recover, recoverNextMessages, removeAllMessages, removeAsyncMessage, removeMessage, resetBatching, setBatch, setMemoryUsage, setPrioritizedMessages
 
Methods inherited from interface org.apache.activemq.Service
start, stop
 

Constructor Detail

MemoryTopicMessageStore

public MemoryTopicMessageStore(ActiveMQDestination destination)

MemoryTopicMessageStore

public MemoryTopicMessageStore(ActiveMQDestination destination,
                               Map<MessageId,Message> messageTable,
                               Map<SubscriptionKey,SubscriptionInfo> subscriberDatabase)
Method Detail

makeSubscriptionInfoMap

protected static Map<SubscriptionKey,SubscriptionInfo> makeSubscriptionInfoMap()

makeSubMap

protected static Map<SubscriptionKey,org.apache.activemq.store.memory.MemoryTopicSub> makeSubMap()

addMessage

public void addMessage(ConnectionContext context,
                       Message message)
                throws IOException
Description copied from interface: MessageStore
Adds a message to the message store

Specified by:
addMessage in interface MessageStore
Overrides:
addMessage in class MemoryMessageStore
Parameters:
context - context
Throws:
IOException

acknowledge

public void acknowledge(ConnectionContext context,
                        String clientId,
                        String subscriptionName,
                        MessageId messageId,
                        MessageAck ack)
                 throws IOException
Description copied from interface: 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:
acknowledge in interface TopicMessageStore
Throws:
IOException

lookupSubscription

public SubscriptionInfo lookupSubscription(String clientId,
                                           String subscriptionName)
                                    throws IOException
Description copied from interface: TopicMessageStore
Finds the subscriber entry for the given consumer info

Specified by:
lookupSubscription in interface TopicMessageStore
Returns:
the SubscriptionInfo
Throws:
IOException

addSubsciption

public void addSubsciption(SubscriptionInfo info,
                           boolean retroactive)
                    throws IOException
Description copied from interface: TopicMessageStore
Inserts the subscriber info due to a subscription change

If this is a new subscription and the retroactive is false, then the last message sent to the topic should be set as the last message acknowledged by they new subscription. Otherwise, if retroactive is true, then create the subscription without it having an acknowledged message so that on recovery, all message recorded for the topic get replayed.

Specified by:
addSubsciption in interface TopicMessageStore
Throws:
IOException

deleteSubscription

public void deleteSubscription(String clientId,
                               String subscriptionName)
Specified by:
deleteSubscription in interface TopicMessageStore

recoverSubscription

public void recoverSubscription(String clientId,
                                String subscriptionName,
                                MessageRecoveryListener listener)
                         throws Exception
Description copied from interface: TopicMessageStore
For the new subscription find the last acknowledged message ID and then find any new messages since then and dispatch them to the subscription.

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 TopicMessageStore
Throws:
Exception

delete

public void delete()
Overrides:
delete in class MemoryMessageStore

getAllSubscriptions

public SubscriptionInfo[] getAllSubscriptions()
                                       throws IOException
Description copied from interface: TopicMessageStore
Lists all the durable subscriptions for a given destination.

Specified by:
getAllSubscriptions in interface TopicMessageStore
Returns:
an array SubscriptionInfos
Throws:
IOException

getMessageCount

public int getMessageCount(String clientId,
                           String subscriberName)
                    throws IOException
Description copied from interface: TopicMessageStore
Get the number of messages ready to deliver from the store to a durable subscriber

Specified by:
getMessageCount in interface TopicMessageStore
Returns:
the outstanding message count
Throws:
IOException

recoverNextMessages

public void recoverNextMessages(String clientId,
                                String subscriptionName,
                                int maxReturned,
                                MessageRecoveryListener listener)
                         throws Exception
Description copied from interface: TopicMessageStore
For an active subscription - retrieve messages from the store for the subscriber after the lastMessageId messageId

Specified by:
recoverNextMessages in interface TopicMessageStore
Throws:
Exception

resetBatching

public void resetBatching(String clientId,
                          String subscriptionName)
Description copied from interface: TopicMessageStore
A hint to the Store to reset any batching state for a durable subscriber

Specified by:
resetBatching in interface TopicMessageStore


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