org.xmlBlaster.contrib.replication.impl
Class InitialUpdater

java.lang.Object
  org.xmlBlaster.contrib.replication.impl.InitialUpdater

All Implemented Interfaces:

org.xmlBlaster.client.I_ConnectionStateListener, ContribConstants, I_ContribPlugin, I_Update, I_ReplSource, ReplicationConstants, org.xmlBlaster.util.I_ReplaceContent

public class InitialUpdater
extends java.lang.Object
implements I_Update, I_ContribPlugin, org.xmlBlaster.client.I_ConnectionStateListener, org.xmlBlaster.util.I_ReplaceContent, ReplicationConstants, I_ReplSource

Nested Class Summary

class

InitialUpdater.ConnectionInfo

Field Summary

protected I_Info	info
protected I_ChangePublisher	publisher used to publish CREATE changes

Fields inherited from interface org.xmlBlaster.contrib.replication.ReplicationConstants

ABSOLUTE_COUNT, ACTION_ATTR, ALREADY_PROCESSED_ATTR, ALTER_ACTION, CATALOG_ATTR, CONTRIB_PERSISTENT_MAP, CREATE_ACTION, DB_ID_ATTR, DELETE_ACTION, DROP_ACTION, DUMP_ACTION, DUMP_CONTENT_ATTR, DUMP_FILENAME, DUMP_POSTFIX, END_OF_TRANSITION, EXCEPTION_ATTR, EXTRA_REPL_KEY_ATTR, GUID_ATTR, INITIAL_DATA_END, INITIAL_DATA_END_TO_REMOTE, INITIAL_DATA_ID, INITIAL_DUMP_AS_XML, INITIAL_FILES_LOCATION, INITIAL_UPDATE_COLLECT, INITIAL_UPDATE_ONLY_REGISTER, INITIAL_UPDATE_START_BATCH, INITIAL_XML_CMD, INSERT_ACTION, KEEP_TRANSACTION_OPEN, MASTER_ATTR, MAX_ENTRIES_ATTR, MESSAGE_SEQ, NUM_OF_TRANSACTIONS, OLD_CONTENT_ATTR, PURPOSE_REPLICATION, REPL_KEY_ATTR, REPL_MANAGER_SESSION, REPL_MANAGER_TOPIC, REPL_PREFIX_DEFAULT, REPL_PREFIX_GROUP_KEY, REPL_PREFIX_KEY, REPL_REQUEST_CANCEL_UPDATE, REPL_REQUEST_RECREATE_TRIGGERS, REPL_REQUEST_UPDATE, REPL_VERSION, REPLICATION_CMD, REPLICATION_FORCE_SENDING, REPLICATION_MAX_ENTRIES_DEFAULT, REPLICATION_MAX_ENTRIES_KEY, REPLICATION_SEND_UNCHANGED_UPDATES, REPLICATION_VERSION, REQUEST_BROADCAST_SQL_TOPIC, REQUEST_CANCEL_UPDATE_TOPIC, REQUEST_INITIAL_DATA_TOPIC, REQUEST_RECREATE_TRIGGERS, RESPONSE_INITIAL_DATA_TOPIC, SCHEMA_ATTR, SIMPLE_MESSAGE, SLAVE_NAME, SQL_TOPIC_ATTR, STATEMENT_ACTION, STATEMENT_ATTR, STATEMENT_ID_ATTR, STATEMENT_PRIO_ATTR, SUPPORTED_VERSIONS, TABLE_NAME_ATTR, TRANSACTION_ATTR, TRANSACTION_SEQ, UPDATE_ACTION, VERSION_ATTR, VERSION_TOKEN

Fields inherited from interface org.xmlBlaster.contrib.ContribConstants

FILE_DATE, FILENAME_ATTR, FILENAME_ATTR_OLD_FASHION, SUBDIR_ATTR, TIMESTAMP_ATTR, TOPIC_NAME

Constructor Summary

InitialUpdater(I_DbSpecific dbSpecific)
Not doing anything.

Method Summary

java.lang.String	buildFilename(java.lang.String replPrefix_, java.lang.String requestedVersion) It builds the name to return in case the version is different from the current version.
void	cancelUpdate(java.lang.String slaveName)
void	collectInitialUpdate()
byte[]	executeStatement(java.lang.String sql, long maxResponseEntries, boolean isHighPrio, boolean isMaster, java.lang.String sqlTopic, java.lang.String statementId)
InitialUpdater.ConnectionInfo	getConnectionInfo(java.sql.Connection conn)
java.lang.String	getTopic()
java.util.Set	getUsedPropertyKeys() Gets all property keys which may be used by this object.
void	init(I_Info info_)
java.lang.String	initialCommand(java.lang.String[] slaveNames, java.lang.String completeFilename, InitialUpdater.ConnectionInfo connInfo, java.lang.String version) This is the intial command which is invoked on the OS.
void	initialCommandPre()
void	initialUpdate(java.lang.String replTopic, java.lang.String replManagerAddress, java.lang.String slaveName, java.lang.String requestedVersion, java.lang.String initialFilesLocation, boolean onlyRegister)
java.lang.String	publishCreate(int counter, SqlInfo updateInfo, long newReplKey, java.lang.String destination) Publishes a 'CREATE TABLE' operation to the XmlBlaster.
void	reachedAlive(org.xmlBlaster.util.dispatch.ConnectionStateEnum oldState, org.xmlBlaster.client.I_XmlBlasterAccess connection) Sends a new registration message
void	reachedAliveSync(org.xmlBlaster.util.dispatch.ConnectionStateEnum oldState, org.xmlBlaster.client.I_XmlBlasterAccess connection) Invoked when the dispatcher goes to synch again after having delivered entries which where in the queue when the state changed to ALIVE.
void	reachedDead(org.xmlBlaster.util.dispatch.ConnectionStateEnum oldState, org.xmlBlaster.client.I_XmlBlasterAccess connection) This is the callback method invoked from XmlBlasterAccess informing the client that the connection was lost (i.e.
void	reachedPolling(org.xmlBlaster.util.dispatch.ConnectionStateEnum oldState, org.xmlBlaster.client.I_XmlBlasterAccess connection) This is the callback method invoked from XmlBlasterAccess informing the client that the connection state has changed to POLLING.
void	recreateTriggers()
byte[]	replace(byte[] oldContent, java.util.Map clientProperties) Replaces or modifies the oldcontent.
void	sendEndOfTransitionMessage(java.lang.String[] slaveSessionNames) This method is used where the end of transition message has to be sent separately (for example for read-only applications without triggers)
void	sendInitialDataResponse(java.lang.String[] slaveSessionNames, java.lang.String shortFilename, java.lang.String replManagerAddress, long minKey, long maxKey, java.lang.String requestedVersion, java.lang.String currentVersion, java.lang.String initialFilesLocation)
void	sendInitialDataResponseOnly(java.lang.String[] slaveSessionNames, java.lang.String replManagerAddress, long minKey, long maxKey) Sending this message will reactivate the Dispatcher of the associated slave
void	shutdown()
void	startInitialUpdateBatch()
void	update(java.lang.String topic, java.io.InputStream is, java.util.Map attrMap) The message received from the MoM or from another source.

Methods inherited from class java.lang.Object

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

Field Detail

publisher

protected I_ChangePublisher publisher

used to publish CREATE changes

info

protected I_Info info

Constructor Detail

InitialUpdater

public InitialUpdater(I_DbSpecific dbSpecific)

Not doing anything.

Method Detail

getUsedPropertyKeys

public final java.util.Set getUsedPropertyKeys()

Description copied from interface: I_ContribPlugin

Gets all property keys which may be used by this object.

Specified by:

getUsedPropertyKeys in interface I_ContribPlugin

Returns:

See Also:

I_ContribPlugin.getUsedPropertyKeys()

getConnectionInfo

public InitialUpdater.ConnectionInfo getConnectionInfo(java.sql.Connection conn)

init

public final void init(I_Info info_)
                throws java.lang.Exception

Specified by:

init in interface I_ContribPlugin

Throws:

java.lang.Exception

See Also:

I_ContribPlugin.init(I_Info)

shutdown

public final void shutdown()
                    throws java.lang.Exception

Specified by:

shutdown in interface I_ContribPlugin

Throws:

java.lang.Exception

See Also:

I_ContribPlugin.shutdown()

publishCreate

public final java.lang.String publishCreate(int counter,
                                            SqlInfo updateInfo,
                                            long newReplKey,
                                            java.lang.String destination)
                                     throws java.lang.Exception

Publishes a 'CREATE TABLE' operation to the XmlBlaster. It is used on the DbWatcher side. Note that it is also used to publish the INSERT commands related to a CREATE TABLE operation, i.e. if on a CREATE TABLE operation it is found that the table is already populated when reading it, then these INSERT operations are published with this method.

Parameters:

counter - The counter indicating which message number it is. The create opeation itself will have '0', the subsequent associated INSERT operations will have an increasing number (it is the number of the message not the number of the associated INSERT operation).

destination - in case it is a ptp it is sent only to that destination, otherwise it is sent as a pub/sub. This parameter also determines on which topic to publish.

Returns:

a uniqueId identifying this publish operation.

Throws:

java.lang.Exception

sendInitialDataResponseOnly

public final void sendInitialDataResponseOnly(java.lang.String[] slaveSessionNames,
                                              java.lang.String replManagerAddress,
                                              long minKey,
                                              long maxKey)
                                       throws java.lang.Exception

Sending this message will reactivate the Dispatcher of the associated slave

Parameters:

topic -

filename -

replManagerAddress -

slaveName -

minKey -

maxKey -

Throws:

java.lang.Exception

sendInitialDataResponse

public final void sendInitialDataResponse(java.lang.String[] slaveSessionNames,
                                          java.lang.String shortFilename,
                                          java.lang.String replManagerAddress,
                                          long minKey,
                                          long maxKey,
                                          java.lang.String requestedVersion,
                                          java.lang.String currentVersion,
                                          java.lang.String initialFilesLocation)
                                   throws java.lang.Exception

Throws:

java.lang.Exception

sendEndOfTransitionMessage

public void sendEndOfTransitionMessage(java.lang.String[] slaveSessionNames)
                                throws javax.jms.JMSException

This method is used where the end of transition message has to be sent separately (for example for read-only applications without triggers)

Parameters:

slaveSessionNames -

Throws:

javax.jms.JMSException

initialCommand

public final java.lang.String initialCommand(java.lang.String[] slaveNames,
                                             java.lang.String completeFilename,
                                             InitialUpdater.ConnectionInfo connInfo,
                                             java.lang.String version)
                                      throws java.lang.Exception

This is the intial command which is invoked on the OS. It is basically used for the import and export of the DB. Could also be used for other operations on the OS. It is a helper method. If the initialCmd (the 'replication.initialCmd' property) is null, then it silently returns null as the filename.

Parameters:

argument - the argument to execute. It is normally the absolute file name to be exported/imported. Can be null, if null, one is generated by using the current timestamp.

conn - the connection to perform a commit on. Can be null, if null, no commit is done asynchronously.

Throws:

java.lang.Exception

buildFilename

public java.lang.String buildFilename(java.lang.String replPrefix_,
                                      java.lang.String requestedVersion)

It builds the name to return in case the version is different from the current version. If initialCmd has been defined as null, null is silenty returned.

Parameters:

replPrefix_ -

requestedVersion -

Returns:

initialCommandPre

public final void initialCommandPre()
                             throws java.lang.Exception

Throws:

java.lang.Exception

reachedAlive

public void reachedAlive(org.xmlBlaster.util.dispatch.ConnectionStateEnum oldState,
                         org.xmlBlaster.client.I_XmlBlasterAccess connection)

Sends a new registration message

Specified by:

reachedAlive in interface org.xmlBlaster.client.I_ConnectionStateListener

Parameters:

oldState - The previous state of the connection.

See Also:

I_ConnectionStateListener.reachedAlive(org.xmlBlaster.util.dispatch.ConnectionStateEnum, org.xmlBlaster.client.I_XmlBlasterAccess)

reachedAliveSync

public void reachedAliveSync(org.xmlBlaster.util.dispatch.ConnectionStateEnum oldState,
                             org.xmlBlaster.client.I_XmlBlasterAccess connection)

Description copied from interface: org.xmlBlaster.client.I_ConnectionStateListener

Invoked when the dispatcher goes to synch again after having delivered entries which where in the queue when the state changed to ALIVE. Note that this could take some time or in the worst case it could never been invoked if the queue is never completely processed.

Specified by:

reachedAliveSync in interface org.xmlBlaster.client.I_ConnectionStateListener

Parameters:

oldState - is always ALIVE.

reachedDead

public void reachedDead(org.xmlBlaster.util.dispatch.ConnectionStateEnum oldState,
                        org.xmlBlaster.client.I_XmlBlasterAccess connection)

Description copied from interface: org.xmlBlaster.client.I_ConnectionStateListener

This is the callback method invoked from XmlBlasterAccess informing the client that the connection was lost (i.e. when the state of the connection has gone to DEAD).

Specified by:

reachedDead in interface org.xmlBlaster.client.I_ConnectionStateListener

Parameters:

oldState - The previous state of the connection.

See Also:

I_ConnectionStateListener.reachedDead(org.xmlBlaster.util.dispatch.ConnectionStateEnum, org.xmlBlaster.client.I_XmlBlasterAccess)

reachedPolling

public void reachedPolling(org.xmlBlaster.util.dispatch.ConnectionStateEnum oldState,
                           org.xmlBlaster.client.I_XmlBlasterAccess connection)

Description copied from interface: org.xmlBlaster.client.I_ConnectionStateListener

This is the callback method invoked from XmlBlasterAccess informing the client that the connection state has changed to POLLING.

Specified by:

reachedPolling in interface org.xmlBlaster.client.I_ConnectionStateListener

Parameters:

oldState - The previous state of the connection.

See Also:

I_ConnectionStateListener.reachedPolling(org.xmlBlaster.util.dispatch.ConnectionStateEnum, org.xmlBlaster.client.I_XmlBlasterAccess)

replace

public byte[] replace(byte[] oldContent,
                      java.util.Map clientProperties)

Description copied from interface: org.xmlBlaster.util.I_ReplaceContent

Replaces or modifies the oldcontent. The returned instance can be the same as passed as the oldContent or it can be a new instance.

Specified by:

replace in interface org.xmlBlaster.util.I_ReplaceContent

clientProperties - the map can either be used as attributes or it can be modified in this method.

Returns:

value

update

public final void update(java.lang.String topic,
                         java.io.InputStream is,
                         java.util.Map attrMap)

Description copied from interface: I_Update

The message received from the MoM or from another source.

Specified by:

update in interface I_Update

Parameters:

topic - The topic name

attrMap - A map with attribute, can be null

See Also:

org.xmlBlaster.contrib.I_Update#update(java.lang.String, byte[], java.util.Map)

collectInitialUpdate

public void collectInitialUpdate()

Specified by:

collectInitialUpdate in interface I_ReplSource

executeStatement

public byte[] executeStatement(java.lang.String sql,
                               long maxResponseEntries,
                               boolean isHighPrio,
                               boolean isMaster,
                               java.lang.String sqlTopic,
                               java.lang.String statementId)
                        throws java.lang.Exception

Specified by:

executeStatement in interface I_ReplSource

Throws:

java.lang.Exception

recreateTriggers

public void recreateTriggers()
                      throws java.lang.Exception

Specified by:

recreateTriggers in interface I_ReplSource

Throws:

java.lang.Exception

cancelUpdate

public void cancelUpdate(java.lang.String slaveName)

Specified by:

cancelUpdate in interface I_ReplSource

initialUpdate

public void initialUpdate(java.lang.String replTopic,
                          java.lang.String replManagerAddress,
                          java.lang.String slaveName,
                          java.lang.String requestedVersion,
                          java.lang.String initialFilesLocation,
                          boolean onlyRegister)

Specified by:

initialUpdate in interface I_ReplSource

getTopic

public java.lang.String getTopic()

Specified by:

getTopic in interface I_ReplSource

startInitialUpdateBatch

public void startInitialUpdateBatch()

Specified by:

startInitialUpdateBatch in interface I_ReplSource