org.apache.activemq.store.memory

Class MemoryMessageStore

java.lang.Object

org.apache.activemq.store.AbstractMessageStore

org.apache.activemq.store.memory.MemoryMessageStore

All Implemented Interfaces:

Service, MessageStore

Direct Known Subclasses:

MemoryTopicMessageStore

public class MemoryMessageStore
extends AbstractMessageStore

An implementation of MessageStore which uses a

Field Summary

Fields

Modifier and Type	Field and Description
protected MessageId	lastBatchId
protected java.util.Map<MessageId,Message>	messageTable
protected long	sequenceId

Fields inherited from class org.apache.activemq.store.AbstractMessageStore

destination, FUTURE, indexListener, prioritizedMessages

Constructor Summary

Constructors

Constructor and Description
MemoryMessageStore(ActiveMQDestination destination)
MemoryMessageStore(ActiveMQDestination destination, java.util.Map<MessageId,Message> messageTable)

Method Summary

Methods

Modifier and Type	Method and Description
void	addMessage(ConnectionContext context, Message message) Adds a message to the message store
void	delete()
Message	getMessage(MessageId identity) Looks up a message using either the String messageID or the messageNumber.
int	getMessageCount()
void	recover(MessageRecoveryListener listener) Recover any messages to be delivered.
void	recoverNextMessages(int maxReturned, MessageRecoveryListener listener)
void	removeAllMessages(ConnectionContext context) Removes all the messages from the message store.
void	removeMessage(ConnectionContext context, MessageAck ack) Removes a message from the message store.
void	removeMessage(MessageId msgId)
void	resetBatching() A hint to the Store to reset any batching state for the Destination
void	setBatch(MessageId messageId) allow caching cursors to set the current batch offset when cache is exhausted
void	updateMessage(Message message)

Methods inherited from class org.apache.activemq.store.AbstractMessageStore

addMessage, asyncAddQueueMessage, asyncAddQueueMessage, asyncAddTopicMessage, asyncAddTopicMessage, dispose, getDestination, getIndexListener, isEmpty, isPrioritizedMessages, registerIndexListener, removeAsyncMessage, setMemoryUsage, setPrioritizedMessages, start, stop

Methods inherited from class java.lang.Object

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

Field Detail

messageTable

protected final java.util.Map<MessageId,Message> messageTable

lastBatchId

protected MessageId lastBatchId

sequenceId

protected long sequenceId

Constructor Detail

MemoryMessageStore

public MemoryMessageStore(ActiveMQDestination destination)

MemoryMessageStore

public MemoryMessageStore(ActiveMQDestination destination,
                  java.util.Map<MessageId,Message> messageTable)

Method Detail

addMessage

public void addMessage(ConnectionContext context,
              Message message)
                throws java.io.IOException

Description copied from interface: MessageStore

Adds a message to the message store

Parameters:

context - context

Throws:

java.io.IOException

getMessage

public Message getMessage(MessageId identity)
                   throws java.io.IOException

Description copied from interface: MessageStore

Looks up a message using either the String messageID or the messageNumber. Implementations are encouraged to fill in the missing key if its easy to do so.

Parameters:

identity - which contains either the messageID or the messageNumber

Returns:

the message or null if it does not exist

Throws:

java.io.IOException

removeMessage

public void removeMessage(ConnectionContext context,
                 MessageAck ack)
                   throws java.io.IOException

Description copied from interface: MessageStore

Removes a message from the message store.

ack - the ack request that cause the message to be removed. It conatins the identity which contains the messageID of the message that needs to be removed.

Throws:

java.io.IOException

removeMessage

public void removeMessage(MessageId msgId)
                   throws java.io.IOException

Throws:

java.io.IOException

recover

public void recover(MessageRecoveryListener listener)
             throws java.lang.Exception

Description copied from interface: MessageStore

Recover any messages to be delivered.

Throws:

java.lang.Exception

removeAllMessages

public void removeAllMessages(ConnectionContext context)
                       throws java.io.IOException

Description copied from interface: MessageStore

Removes all the messages from the message store.

Throws:

java.io.IOException

delete

public void delete()

getMessageCount

public int getMessageCount()

Returns:

the number of messages ready to deliver

recoverNextMessages

public void recoverNextMessages(int maxReturned,
                       MessageRecoveryListener listener)
                         throws java.lang.Exception

Throws:

java.lang.Exception

resetBatching

public void resetBatching()

Description copied from interface: MessageStore

A hint to the Store to reset any batching state for the Destination

setBatch

public void setBatch(MessageId messageId)

Description copied from interface: MessageStore

allow caching cursors to set the current batch offset when cache is exhausted

Specified by:

setBatch in interface MessageStore

Overrides:

setBatch in class AbstractMessageStore

updateMessage

public void updateMessage(Message message)

Specified by:

updateMessage in interface MessageStore

Overrides:

updateMessage in class AbstractMessageStore