org.apache.activemq.store.journal

Class JournalPersistenceAdapter

java.lang.Object

org.apache.activemq.store.journal.JournalPersistenceAdapter

All Implemented Interfaces:

org.apache.activeio.journal.JournalEventListener, BrokerServiceAware, Service, PersistenceAdapter, UsageListener

public class JournalPersistenceAdapter
extends Object
implements PersistenceAdapter, org.apache.activeio.journal.JournalEventListener, UsageListener, BrokerServiceAware

An implementation of PersistenceAdapter designed for use with a Journal and then check pointing asynchronously on a timeout with some other long term persistent storage.

Field Summary

Fields

Modifier and Type	Field and Description
protected Scheduler	scheduler

Constructor Summary

Constructors

Constructor and Description
JournalPersistenceAdapter()
JournalPersistenceAdapter(org.apache.activeio.journal.Journal journal, PersistenceAdapter longTermPersistence, TaskRunnerFactory taskRunnerFactory)

Method Summary

Methods

Modifier and Type	Method and Description
void	beginTransaction(ConnectionContext context) This method starts a transaction on the persistent storage - which is nothing to do with JMS or XA transactions - its purely a mechanism to perform multiple writes to a persistent store in 1 transaction as a performance optimization.
void	checkpoint(boolean sync) checkpoint any
void	checkpoint(boolean sync, boolean fullCheckpoint) When we checkpoint we move all the journalled data to long term storage.
void	commitTransaction(ConnectionContext context) Commit a persistence transaction
MessageStore	createQueueMessageStore(ActiveMQQueue destination) Factory method to create a new queue message store with the given destination name
protected IOException	createRecoveryFailedException(Exception e)
TopicMessageStore	createTopicMessageStore(ActiveMQTopic destinationName) Factory method to create a new topic message store with the given destination name
TransactionStore	createTransactionStore() Factory method to create a new persistent prepared transaction store for XA recovery
protected IOException	createWriteException(DataStructure packet, Exception e)
protected IOException	createWriteException(String command, Exception e)
void	deleteAllMessages() Delete's all the messages in the persistent store.
boolean	doCheckpoint() This does the actual checkpoint.
Set<ActiveMQDestination>	getDestinations() Returns a set of all the ActiveMQDestination objects that the persistence store is aware exist.
File	getDirectory()
long	getLastMessageBrokerSequenceId()
long	getLastProducerSequenceId(ProducerId id) return the last stored producer sequenceId for this producer Id used to suppress duplicate sends on failover reconnect at the transport when a reconnect occurs
PersistenceAdapter	getLongTermPersistence()
int	getMaxCheckpointMessageAddSize()
int	getMaxCheckpointWorkers()
JournalTransactionStore	getTransactionStore()
SystemUsage	getUsageManager()
WireFormat	getWireFormat()
boolean	isUseExternalMessageReferences()
void	onUsageChanged(Usage usage, int oldPercentUsage, int newPercentUsage)
void	overflowNotification(org.apache.activeio.journal.RecordLocation safeLocation) The Journal give us a call back so that we can move old data out of the journal.
DataStructure	readCommand(org.apache.activeio.journal.RecordLocation location)
void	removeQueueMessageStore(ActiveMQQueue destination) Cleanup method to remove any state associated with the given destination
void	removeTopicMessageStore(ActiveMQTopic destination) Cleanup method to remove any state associated with the given destination
void	rollbackTransaction(ConnectionContext context) Rollback a persistence transaction
void	setBrokerName(String brokerName) Set the name of the broker using the adapter
void	setBrokerService(BrokerService brokerService)
void	setDirectory(File dir) Set the directory where any data files should be created
void	setJournal(org.apache.activeio.journal.Journal journal)
void	setMaxCheckpointMessageAddSize(int maxCheckpointMessageAddSize)
void	setMaxCheckpointWorkers(int maxCheckpointWorkers)
void	setPersistenceAdapter(PersistenceAdapter longTermPersistence)
void	setTaskRunnerFactory(TaskRunnerFactory taskRunnerFactory)
void	setUsageManager(SystemUsage usageManager)
void	setUseExternalMessageReferences(boolean enable)
long	size() A hint to return the size of the store on disk
void	start()
void	stop()
ByteSequence	toByteSequence(org.apache.activeio.packet.Packet packet)
org.apache.activeio.packet.Packet	toPacket(ByteSequence sequence)
String	toString()
org.apache.activeio.journal.RecordLocation	writeCommand(DataStructure command, boolean sync)

Methods inherited from class java.lang.Object

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

Field Detail

scheduler

protected Scheduler scheduler

Constructor Detail

JournalPersistenceAdapter

public JournalPersistenceAdapter()

JournalPersistenceAdapter

public JournalPersistenceAdapter(org.apache.activeio.journal.Journal journal,
                         PersistenceAdapter longTermPersistence,
                         TaskRunnerFactory taskRunnerFactory)
                          throws IOException

Throws:

IOException

Method Detail

setTaskRunnerFactory

public void setTaskRunnerFactory(TaskRunnerFactory taskRunnerFactory)

setJournal

public void setJournal(org.apache.activeio.journal.Journal journal)

setPersistenceAdapter

public void setPersistenceAdapter(PersistenceAdapter longTermPersistence)

setUsageManager

public void setUsageManager(SystemUsage usageManager)

Specified by:

setUsageManager in interface PersistenceAdapter

Parameters:

usageManager - The UsageManager that is controlling the destination's memory usage.

getDestinations

public Set<ActiveMQDestination> getDestinations()

Description copied from interface: PersistenceAdapter

Returns a set of all the ActiveMQDestination objects that the persistence store is aware exist.

Specified by:

getDestinations in interface PersistenceAdapter

Returns:

active destinations

createQueueMessageStore

public MessageStore createQueueMessageStore(ActiveMQQueue destination)
                                     throws IOException

Description copied from interface: PersistenceAdapter

Factory method to create a new queue message store with the given destination name

Specified by:

createQueueMessageStore in interface PersistenceAdapter

Returns:

the message store

Throws:

IOException

createTopicMessageStore

public TopicMessageStore createTopicMessageStore(ActiveMQTopic destinationName)
                                          throws IOException

Description copied from interface: PersistenceAdapter

Factory method to create a new topic message store with the given destination name

Specified by:

createTopicMessageStore in interface PersistenceAdapter

Returns:

the topic message store

Throws:

IOException

removeQueueMessageStore

public void removeQueueMessageStore(ActiveMQQueue destination)

Cleanup method to remove any state associated with the given destination

Specified by:

removeQueueMessageStore in interface PersistenceAdapter

Parameters:

destination - Destination to forget

removeTopicMessageStore

public void removeTopicMessageStore(ActiveMQTopic destination)

Cleanup method to remove any state associated with the given destination

Specified by:

removeTopicMessageStore in interface PersistenceAdapter

Parameters:

destination - Destination to forget

createTransactionStore

public TransactionStore createTransactionStore()
                                        throws IOException

Description copied from interface: PersistenceAdapter

Factory method to create a new persistent prepared transaction store for XA recovery

Specified by:

createTransactionStore in interface PersistenceAdapter

Returns:

transaction store

Throws:

IOException

getLastMessageBrokerSequenceId

public long getLastMessageBrokerSequenceId()
                                    throws IOException

Specified by:

getLastMessageBrokerSequenceId in interface PersistenceAdapter

Returns:

last broker sequence

Throws:

IOException

beginTransaction

public void beginTransaction(ConnectionContext context)
                      throws IOException

Description copied from interface: PersistenceAdapter

This method starts a transaction on the persistent storage - which is nothing to do with JMS or XA transactions - its purely a mechanism to perform multiple writes to a persistent store in 1 transaction as a performance optimization.

Typically one transaction will require one disk synchronization point and so for real high performance its usually faster to perform many writes within the same transaction to minimize latency caused by disk synchronization. This is especially true when using tools like Berkeley Db or embedded JDBC servers.

Specified by:

beginTransaction in interface PersistenceAdapter

Throws:

IOException

commitTransaction

public void commitTransaction(ConnectionContext context)
                       throws IOException

Description copied from interface: PersistenceAdapter

Commit a persistence transaction

Specified by:

commitTransaction in interface PersistenceAdapter

Throws:

IOException

See Also:

PersistenceAdapter.beginTransaction(ConnectionContext context)

rollbackTransaction

public void rollbackTransaction(ConnectionContext context)
                         throws IOException

Description copied from interface: PersistenceAdapter

Rollback a persistence transaction

Specified by:

rollbackTransaction in interface PersistenceAdapter

Throws:

IOException

See Also:

PersistenceAdapter.beginTransaction(ConnectionContext context)

start

public void start()
           throws Exception

Specified by:

start in interface Service

Throws:

Exception

stop

public void stop()
          throws Exception

Specified by:

stop in interface Service

Throws:

Exception

getLongTermPersistence

public PersistenceAdapter getLongTermPersistence()

getWireFormat

public WireFormat getWireFormat()

Returns:

Returns the wireFormat.

overflowNotification

public void overflowNotification(org.apache.activeio.journal.RecordLocation safeLocation)

The Journal give us a call back so that we can move old data out of the journal. Taking a checkpoint does this for us.

Specified by:

overflowNotification in interface org.apache.activeio.journal.JournalEventListener

See Also:

org.apache.activemq.journal.JournalEventListener#overflowNotification(org.apache.activemq.journal.RecordLocation)

checkpoint

public void checkpoint(boolean sync,
              boolean fullCheckpoint)

When we checkpoint we move all the journalled data to long term storage.

checkpoint

public void checkpoint(boolean sync)

Description copied from interface: PersistenceAdapter

checkpoint any

Specified by:

checkpoint in interface PersistenceAdapter

doCheckpoint

public boolean doCheckpoint()

This does the actual checkpoint.

Returns:

readCommand

public DataStructure readCommand(org.apache.activeio.journal.RecordLocation location)
                          throws IOException

Parameters:

location -

Returns:

Throws:

IOException

createWriteException

protected IOException createWriteException(DataStructure packet,
                               Exception e)

createWriteException

protected IOException createWriteException(String command,
                               Exception e)

createRecoveryFailedException

protected IOException createRecoveryFailedException(Exception e)

writeCommand

public org.apache.activeio.journal.RecordLocation writeCommand(DataStructure command,
                                                      boolean sync)
                                                        throws IOException

Parameters:

command -

sync -

Returns:

Throws:

IOException

onUsageChanged

public void onUsageChanged(Usage usage,
                  int oldPercentUsage,
                  int newPercentUsage)

Specified by:

onUsageChanged in interface UsageListener

getTransactionStore

public JournalTransactionStore getTransactionStore()

deleteAllMessages

public void deleteAllMessages()
                       throws IOException

Description copied from interface: PersistenceAdapter

Delete's all the messages in the persistent store.

Specified by:

deleteAllMessages in interface PersistenceAdapter

Throws:

IOException

getUsageManager

public SystemUsage getUsageManager()

getMaxCheckpointMessageAddSize

public int getMaxCheckpointMessageAddSize()

setMaxCheckpointMessageAddSize

public void setMaxCheckpointMessageAddSize(int maxCheckpointMessageAddSize)

getMaxCheckpointWorkers

public int getMaxCheckpointWorkers()

setMaxCheckpointWorkers

public void setMaxCheckpointWorkers(int maxCheckpointWorkers)

isUseExternalMessageReferences

public boolean isUseExternalMessageReferences()

setUseExternalMessageReferences

public void setUseExternalMessageReferences(boolean enable)

toPacket

public org.apache.activeio.packet.Packet toPacket(ByteSequence sequence)

toByteSequence

public ByteSequence toByteSequence(org.apache.activeio.packet.Packet packet)

setBrokerName

public void setBrokerName(String brokerName)

Description copied from interface: PersistenceAdapter

Set the name of the broker using the adapter

Specified by:

setBrokerName in interface PersistenceAdapter

toString

public String toString()

Overrides:

toString in class Object

setDirectory

public void setDirectory(File dir)

Description copied from interface: PersistenceAdapter

Set the directory where any data files should be created

Specified by:

setDirectory in interface PersistenceAdapter

getDirectory

public File getDirectory()

Specified by:

getDirectory in interface PersistenceAdapter

Returns:

the directory used by the persistence adaptor

size

public long size()

Description copied from interface: PersistenceAdapter

A hint to return the size of the store on disk

Specified by:

size in interface PersistenceAdapter

Returns:

disk space used in bytes of 0 if not implemented

setBrokerService

public void setBrokerService(BrokerService brokerService)

Specified by:

setBrokerService in interface BrokerServiceAware

getLastProducerSequenceId

public long getLastProducerSequenceId(ProducerId id)

Description copied from interface: PersistenceAdapter

return the last stored producer sequenceId for this producer Id used to suppress duplicate sends on failover reconnect at the transport when a reconnect occurs

Specified by:

getLastProducerSequenceId in interface PersistenceAdapter

Parameters:

id - the producerId to find a sequenceId for

Returns:

the last stored sequence id or -1 if no suppression needed