com.arjuna.ats.arjuna.coordinator

Class TwoPhaseCoordinator

java.lang.Object

com.arjuna.ats.arjuna.StateManager

com.arjuna.ats.arjuna.coordinator.BasicAction

com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator

All Implemented Interfaces:

Reapable

Direct Known Subclasses:

AtomicAction

public class TwoPhaseCoordinator
extends BasicAction
implements Reapable

Adds support for synchronizations to BasicAction. It does not change thread associations either. It also allows any thread to terminate a transaction, even if it is not the transaction that is marked as current for the thread (unlike the BasicAction default).

Since:

JTS 3.0.

Version:

$Id: TwoPhaseCoordinator.java 2342 2006-03-30 13:06:17Z $

Author:

Mark Little (mark@arjuna.com)

Field Summary

Fields inherited from class com.arjuna.ats.arjuna.coordinator.BasicAction

failedList, heuristicList, pendingList, preparedList, readonlyList, savedIntentionList, subordinate

Fields inherited from class com.arjuna.ats.arjuna.StateManager

modifyingActions, objectModel, objectUid, usingActions

Constructor Summary

Constructors

Modifier	Constructor and Description
	TwoPhaseCoordinator()
protected	TwoPhaseCoordinator(int at)
	TwoPhaseCoordinator(Uid id)
protected	TwoPhaseCoordinator(Uid u, int at)

Method Summary

Modifier and Type	Method and Description
int	addSynchronization(SynchronizationRecord sr)
protected boolean	afterCompletion(int myStatus) Drive afterCompletion participants.
protected boolean	afterCompletion(int myStatus, boolean report_heuristics) Drive afterCompletion participants.
protected boolean	asyncAfterCompletion(int myStatus, boolean report_heuristics)
protected boolean	beforeCompletion() Drive beforeCompletion participants.
int	cancel() If this method is called and a transaction is not in a status of RUNNING, ABORT_ONLY or COMMITTING then do not call afterCompletion.
int	end(boolean report_heuristics)
Throwable	getDeferredThrowable() Get any Throwable that was caught during commit processing but not directly rethrown.
Map<Uid,String>	getSynchronizations()
boolean	running()
int	start()
int	start(BasicAction parentAction)
String	type() Overloads BasicAction.type()

Methods inherited from class com.arjuna.ats.arjuna.coordinator.BasicAction

Abort, Abort, abortStatus, activate, activate, activeThreads, add, addChildAction, addChildThread, addChildThread, addRecord, async_prepare, Begin, checkForCurrent, childTransactions, commitStatus, criticalEnd, criticalStart, Current, deactivate, destroy, doAbort, doAbort, doCommit, doCommit, doPrepare, End, equals, finalizeInternal, forgetHeuristics, getDeferredThrowables, getHeuristicDecision, getHierarchy, getSavingUid, getStore, hashCode, hierarchyDepth, insertRecord, isAncestor, maintainHeuristics, onePhaseCommit, onePhaseCommit, parent, phase2Abort, phase2Cleanup, phase2Commit, prepare, preparedStatus, preventCommit, removeChildAction, removeChildThread, removeChildThread, restore_state, save_state, setCheckedAction, setHeuristicDecision, status, topLevelAction, topLevelActionUid, toString, typeOfAction, updateHeuristic, updateState

Methods inherited from class com.arjuna.ats.arjuna.StateManager

cleanup, createLists, deactivate, deactivate, disable, forgetAction, get_uid, getMutex, getObjectModel, getStoreRoot, loadObjectState, lockMutex, modified, objectType, packHeader, persist, print, rememberAction, setStatus, setupStore, setupStore, setupStore, terminate, tryLockMutex, unlockMutex, unpackHeader

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.arjuna.ats.arjuna.coordinator.Reapable

get_uid, preventCommit

Constructor Detail

TwoPhaseCoordinator

public TwoPhaseCoordinator()

TwoPhaseCoordinator

public TwoPhaseCoordinator(Uid id)

TwoPhaseCoordinator

protected TwoPhaseCoordinator(int at)

TwoPhaseCoordinator

protected TwoPhaseCoordinator(Uid u,
                              int at)

Method Detail

start

public int start()

start

public int start(BasicAction parentAction)

end

public int end(boolean report_heuristics)

cancel

public int cancel()

If this method is called and a transaction is not in a status of RUNNING, ABORT_ONLY or COMMITTING then do not call afterCompletion. A scenario where this may occur is if during the completion of a previous transaction, a runtime exception is thrown from one of the AbstractRecords methods. RuntimeExceptions are not part of the contract of the API and as such all we can do is leave the transaction alone.

Specified by:

cancel in interface Reapable

addSynchronization

public int addSynchronization(SynchronizationRecord sr)

running

public boolean running()

Specified by:

running in interface Reapable

Returns:

true if the transaction is running, false otherwise.

type

public String type()

Overloads BasicAction.type()

Overrides:

type in class BasicAction

getDeferredThrowable

public Throwable getDeferredThrowable()

Get any Throwable that was caught during commit processing but not directly rethrown.

Returns:

the Throwable, if any

beforeCompletion

protected boolean beforeCompletion()

Drive beforeCompletion participants.

Returns:

true if successful, false otherwise.

asyncAfterCompletion

protected boolean asyncAfterCompletion(int myStatus,
                                       boolean report_heuristics)

afterCompletion

protected boolean afterCompletion(int myStatus)

Drive afterCompletion participants.

Parameters:

myStatus - the outcome of the transaction (ActionStatus.COMMITTED or ActionStatus.ABORTED).

Returns:

true if successful, false otherwise.

afterCompletion

protected boolean afterCompletion(int myStatus,
                                  boolean report_heuristics)

Drive afterCompletion participants.

Parameters:

myStatus - the outcome of the transaction (ActionStatus.COMMITTED or ActionStatus.ABORTED).

report_heuristics - does the caller want to be informed about heurisitics at the point of invocation?

Returns:

true if successful, false otherwise.

getSynchronizations

public Map<Uid,String> getSynchronizations()