org.objectweb.cjdbc.controller.virtualdatabase.protocol
Class UnlogRollback

java.lang.Object
  org.objectweb.cjdbc.controller.virtualdatabase.protocol.DistributedRequest
      org.objectweb.cjdbc.controller.virtualdatabase.protocol.UnlogRollback

All Implemented Interfaces:

java.io.Serializable

public class UnlogRollback

extends DistributedRequest

This class defines an UnlogRollback command that is sent when a rollback has failed on all controllers and it is necessary for controllers without backend to remove this rollback from their recovery log since they systematically log all update statements.

Version:

1.0

Author:

Emmanuel Cecchet

See Also:

Serialized Form

Field Summary

private static long	serialVersionUID
private TransactionMarkerMetaData	tm

Fields inherited from class org.objectweb.cjdbc.controller.virtualdatabase.protocol.DistributedRequest

request

Constructor Summary

UnlogRollback(TransactionMarkerMetaData tm)
Creates a new UnlogRollback object

Method Summary

java.lang.Object	executeScheduledRequest(DistributedRequestManager drm) Code to be executed by the distributed request manager receiving the request.
void	scheduleRequest(DistributedRequestManager drm) Schedule the request.

Methods inherited from class org.objectweb.cjdbc.controller.virtualdatabase.protocol.DistributedRequest

getRequest

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

tm

private TransactionMarkerMetaData tm

Constructor Detail

UnlogRollback

public UnlogRollback(TransactionMarkerMetaData tm)

Creates a new UnlogRollback object

Parameters:

tm - the identifier of the rollbacked transaction to unlog from the recovery log on controller where the request should be unlogged

Method Detail

scheduleRequest

public final void scheduleRequest(DistributedRequestManager drm)
                           throws java.sql.SQLException

Description copied from class: DistributedRequest

Schedule the request. This method blocks until the request is scheduled.

Specified by:

scheduleRequest in class DistributedRequest

Parameters:

drm - a distributed request manager

Throws:

java.sql.SQLException - if an error occurs.

See Also:

DistributedRequest.scheduleRequest(org.objectweb.cjdbc.controller.requestmanager.distributed.DistributedRequestManager)

executeScheduledRequest

public final java.lang.Object executeScheduledRequest(DistributedRequestManager drm)
                                               throws java.sql.SQLException

Description copied from class: DistributedRequest

Code to be executed by the distributed request manager receiving the request.

Specified by:

executeScheduledRequest in class DistributedRequest

Parameters:

drm - a distributed request manager

Returns:

an Object to be sent back to the caller

Throws:

java.sql.SQLException - if an error occurs.

See Also:

DistributedRequest.executeScheduledRequest(org.objectweb.cjdbc.controller.requestmanager.distributed.DistributedRequestManager)