com.continuent.tungsten.replicator.applier
Class ApplierWrapper

java.lang.Object
  com.continuent.tungsten.replicator.applier.ApplierWrapper

All Implemented Interfaces:

Applier, ParallelApplier, ReplicatorPlugin

public class ApplierWrapper
extends java.lang.Object
implements ParallelApplier

This class wraps a basic Applier so that it handles ReplDBMSEvent values with assigned sequence numbers.

Version:

1.0

Author:

Robert Hodges

Constructor Summary

ApplierWrapper(RawApplier applier)
Create a new instance to wrap a raw applier.

Method Summary

void	apply(ReplDBMSEvent event, boolean doCommit, boolean doRollback, boolean syncTHL) Apply the DBMSEvent in the ReplDBMSEvent.
void	commit() Commits current open transaction to ensure data applied up to current point are durable.
void	configure(PluginContext context) Complete plug-in configuration.
RawApplier	getApplier() Return wrapped applier.
ReplDBMSHeader	getLastEvent() Return header information corresponding to last committed transaction.
void	prepare(PluginContext context) Prepare plug-in for use.
void	release(PluginContext context) Release all resources used by plug-in.
void	rollback() Rolls back any current work.
void	setTaskId(int id) Sets the ID of the task using this applier.
void	updatePosition(ReplDBMSHeader header, boolean doCommit, boolean syncTHL) Update current recovery position but do not apply an event.

Methods inherited from class java.lang.Object

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

Constructor Detail

ApplierWrapper

public ApplierWrapper(RawApplier applier)

Create a new instance to wrap a raw applier.

Parameters:

applier - Extractor to be wrapped

Method Detail

getApplier

public RawApplier getApplier()

Return wrapped applier.

setTaskId

public void setTaskId(int id)

Sets the ID of the task using this applier.

Specified by:

setTaskId in interface ParallelApplier

Parameters:

id - Task ID

See Also:

ParallelApplier.setTaskId(int)

apply

public void apply(ReplDBMSEvent event,
                  boolean doCommit,
                  boolean doRollback,
                  boolean syncTHL)
           throws ReplicatorException,
                  ConsistencyException,
                  java.lang.InterruptedException

Apply the DBMSEvent in the ReplDBMSEvent. Apply the proffered event to the replication target.

Specified by:

apply in interface Applier

Parameters:

event - Event to be applied

doCommit - Boolean flag indicating whether this is the last part of multipart event

doRollback - Boolean flag indicating whether this transaction should rollback

syncTHL - Should this applier synchronize the trep_commit_seqno table? This should be false for slave.

Throws:

ReplicatorException - Thrown if applier processing fails

ConsistencyException - Thrown if the applier detects that a consistency check has failed

java.lang.InterruptedException - Thrown if the applier is interrupted

See Also:

Applier.apply(com.continuent.tungsten.replicator.event.ReplDBMSEvent, boolean, boolean, boolean)

updatePosition

public void updatePosition(ReplDBMSHeader header,
                           boolean doCommit,
                           boolean syncTHL)
                    throws ReplicatorException,
                           java.lang.InterruptedException

Update current recovery position but do not apply an event.

Specified by:

updatePosition in interface Applier

Parameters:

header - Header containing seqno, event ID, etc.

doCommit - Boolean flag indicating whether this is the last part of multipart event

syncTHL - Should this applier synchronize the trep_commit_seqno table? This should be false for slave.

Throws:

ReplicatorException - Thrown if applier processing fails

java.lang.InterruptedException - Thrown if the applier is interrupted

See Also:

Applier.updatePosition(com.continuent.tungsten.replicator.event.ReplDBMSHeader, boolean, boolean)

commit

public void commit()
            throws ReplicatorException,
                   java.lang.InterruptedException

Commits current open transaction to ensure data applied up to current point are durable.

Specified by:

commit in interface Applier

Throws:

ReplicatorException - Thrown if applier processing fails

java.lang.InterruptedException - Thrown if the applier is interrupted

See Also:

Applier.commit()

rollback

public void rollback()
              throws java.lang.InterruptedException

Rolls back any current work.

Specified by:

rollback in interface Applier

Throws:

java.lang.InterruptedException

See Also:

Applier.rollback()

getLastEvent

public ReplDBMSHeader getLastEvent()
                            throws ReplicatorException,
                                   java.lang.InterruptedException

Return header information corresponding to last committed transaction.

Specified by:

getLastEvent in interface Applier

Returns:

Header data for last committed transaction

Throws:

ReplicatorException - Thrown if getting sequence number fails

java.lang.InterruptedException - Thrown if the applier is interrupted

See Also:

Applier.getLastEvent()

configure

public void configure(PluginContext context)
               throws ReplicatorException,
                      java.lang.InterruptedException

Complete plug-in configuration. This is called after setters are invoked at the time that the replicator goes through configuration.

Specified by:

configure in interface ReplicatorPlugin

Throws:

ReplicatorException - Thrown if configuration is incomplete or fails

java.lang.InterruptedException

See Also:

ReplicatorPlugin.configure(com.continuent.tungsten.replicator.plugin.PluginContext)

prepare

public void prepare(PluginContext context)
             throws ReplicatorException,
                    java.lang.InterruptedException

Prepare plug-in for use. This method is assumed to allocate all required resources. It is called before the plug-in performs any operations.

Specified by:

prepare in interface ReplicatorPlugin

Throws:

ReplicatorException - Thrown if resource allocation fails

java.lang.InterruptedException

See Also:

ReplicatorPlugin.prepare(com.continuent.tungsten.replicator.plugin.PluginContext)

release

public void release(PluginContext context)
             throws ReplicatorException,
                    java.lang.InterruptedException

Release all resources used by plug-in. This is called before the plug-in is deallocated.

Specified by:

release in interface ReplicatorPlugin

Throws:

ReplicatorException - Thrown if resource deallocation fails

java.lang.InterruptedException

See Also:

ReplicatorPlugin.release(com.continuent.tungsten.replicator.plugin.PluginContext)