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/*
* Copyright 2004-2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
//----------------------------------------------------------------------------
//
// Module: CoordinatorTerm.java
//
// Description: Client Coordinator termination.
//
// Product: com.sun.jts.CosTransactions
//
// Author: Simon Holdsworth
//
// Date: March, 1997
//
// Copyright (c): 1995-1997 IBM Corp.
//
// The source code for this program is not published or otherwise divested
// of its trade secrets, irrespective of what has been deposited with the
// U.S. Copyright Office.
//
// This software contains confidential and proprietary information of
// IBM Corp.
//----------------------------------------------------------------------------
package com.sun.jts.CosTransactions;
// Import required classes.
import org.omg.CORBA.*;
import org.omg.CosTransactions.*;
import com.sun.jts.trace.*;
import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.logging.LogDomains;
import com.sun.jts.utils.LogFormatter;
/**The CoordinatorTerm interface provides operations that allow an
* Terminator to direct completion of a transaction without any dependency
* on the Coordinator interface.
*
* @version 0.01
*
* @author Simon Holdsworth, IBM Corporation
*
* @see
*/
//----------------------------------------------------------------------------
// CHANGE HISTORY
//
// Version By Change Description
// 0.01 SAJH Initial implementation.
//------------------------------------------------------------------------------
class CoordinatorTerm implements CompletionHandler {
private CoordinatorImpl coordinator = null;
private boolean subtransaction = false;
private boolean aborted = false;
private boolean heuristicDamage = false;
private boolean completed = false;
private boolean completing = false;
/*
Logger to log transaction messages
*/
static Logger _logger = LogDomains.getLogger(LogDomains.TRANSACTION_LOGGER);
/**Default CoordinatorTerm constructor.
*
* @param
*
* @return
*
* @see
*/
CoordinatorTerm() {
}
/**Normal constructor.
* <p>
* Sets up the CoordinatorTerm with the Coordinator reference so that the
* CoordinatorTerm can find the Coordinator to pass on the two-phase commit
* messages.
* <p>
* A flag is passed to indicate whether the CoordinatorTerm
* represents a subtransaction.
*
* @param coord The Coordinator for the transaction.
* @param subtran The subtransaction indicator.
*
* @return
*
* @see
*/
CoordinatorTerm( CoordinatorImpl coord,
boolean subtran ) {
// Set up the instance variables from the values passed.
coordinator = coord;
subtransaction = subtran;
// Inform the Coordinator that this is the object that normally terminates
// the transaction.
if( coordinator != null )
coordinator.setTerminator(this);
}
/**Cleans up the objects state.
*
* @param
*
* @return
*
* @see
*/
/*
public void finalize() {
// If the transaction has not been completed as far as the CoordinatorTerm
// object is concerned, then roll back the Coordinator.
if( !completed ) {
completing = true;
try {
coordinator.rollback(true);
} catch( Throwable exc ) {
}
if( !subtransaction )
((TopCoordinator)coordinator).afterCompletion(Status.StatusRolledBack);
}
coordinator = null;
}
*/
/**Informs the object that the transaction is to be committed.
* <p>
* Uses a private interface to pass the Terminator's commit request on to the
* Coordinator.
* <p>
* This operation does not check for outstanding requests, that is done by
* the Current operations (when the client is using direct interaction we
* cannot provide checked behavior).
* <p>
* Before telling the Coordinator to commit, it is informed that the
* transaction is about to complete, and afterwards it is told that the
* transaction has completed, with an indication of commit or rollback.
*
* @param promptReturn Indicates whether to return promptly.
*
* @return
*
* @exception TRANSACTION_ROLLEDBACK The transaction could not be committed and
* has been rolled back.
* @exception HeuristicHazard Heuristic action may have been taken by a
* participant in the transaction.
* @exception HeuristicMixed Heuristic action has been taken by a participant
* in the transaction so part of the transaction has
* been rolled back.
* @exception SystemException An error occurred calling another object.
* @exception LogicErrorException An internal logic error occurred.
*
* @see
*/
void commit( boolean promptReturn )
throws HeuristicMixed, HeuristicHazard, TRANSACTION_ROLLEDBACK,
SystemException, LogicErrorException {
// BUGFIX(Ram J) (12/16/2000) This was previously set to true, which the
// caused commit_one_phase exceptions not to be reported.
boolean commit_one_phase_worked_ok = false;
// If the transaction that this object represents has already been rolled
// back, raise the TRANSACTION_ROLLEDBACK exception and return.
// If the transaction completed with heuristic damage, report that.
if( aborted ) {
throw new TRANSACTION_ROLLEDBACK(0,CompletionStatus.COMPLETED_NO);
}
// If there is no Coordinator reference, raise an exception.
if( coordinator == null ) {
String msg = LogFormatter.getLocalizedMessage(_logger,
"jts.no_coordinator_available");
LogicErrorException exc =
new LogicErrorException(msg);
throw exc;
}
// Remember that it is us that have initiated the completion so that we can
// ignore the aborted operation if it happens subsequently.
completing = true;
// Determine the current Control object and Coordinator. Determine whether
// the current transaction is the same as that being committed.
ControlImpl current = CurrentTransaction.getCurrent();
ControlImpl establishedControl = null;
Coordinator currentCoord = null;
boolean sameCoordinator = false;
if( current != null )
try {
if (Configuration.isLocalFactory()) {
currentCoord = current.get_localCoordinator();
} else {
currentCoord = current.get_coordinator();
}
sameCoordinator = coordinator.is_same_transaction(currentCoord);
} catch( Unavailable exc ) {}
// We must ensure that there is a current transaction at this point if it is a
// top-level transaction because the Synchronization objects expect to have
// transaction context.
// If this CoordinatorTerm was created by a Factory, then this commit will
// not have context because the Terminator is not a transactional object.
if( !subtransaction ) {
try {
if( current == null ||
!sameCoordinator ) {
establishedControl = new ControlImpl(null,coordinator,
new GlobalTID(coordinator.getGlobalTID()),
new Long(coordinator.getLocalTID()));
CurrentTransaction.setCurrent(establishedControl,true);
}
} catch( Throwable exc ) {
}
// Tell the Coordinator that the transaction is about to complete.
try {
((TopCoordinator)coordinator).beforeCompletion();
}
// If the Coordinator raised an exception, return it to the caller.
catch( SystemException exc ) {
completing = false;
throw exc;
}
// If a temporary context was established, end it now.
finally {
if( establishedControl != null ) {
CurrentTransaction.endCurrent(true);
establishedControl.doFinalize();
}
}
}
// End the association of the current Control object with the current thread
// if it is the same transaction as the one being committed.
// This is done here rather than in Current because the before completion
// method must be invoked while the transaction is still active.
Status status = Status.StatusCommitted;
if( sameCoordinator )
CurrentTransaction.endCurrent(true);
// Now, process the actual 2PC
Throwable heuristicExc = null;
// GDH Now see if we can legally call commit one phase
// the commitOnePhase method will return false if this is
// not possible.
try {
commit_one_phase_worked_ok = coordinator.commitOnePhase();
} catch( Throwable exc ) {
if( exc instanceof HeuristicHazard ||
exc instanceof HeuristicMixed ) {
heuristicExc = exc;
} else if( exc instanceof TRANSACTION_ROLLEDBACK ) {
status = Status.StatusRolledBack;
} else if( exc instanceof INVALID_TRANSACTION ) {
// Why have we driven before completion before now?
throw (INVALID_TRANSACTION)exc;
} if (exc instanceof INTERNAL) {
// ADDED(Ram J) percolate any system exception
// back to the caller.
throw (INTERNAL) exc;
}else {
}
}
if( commit_one_phase_worked_ok ) {
// Then we have done the commit already above
// Set the status for the after completion call
// even though currently the parm is not used
// inside the call - it get's the state from transtate
// the status variable here is a local flag.
status = Status.StatusCommitted; // GDH COPDEF1 Added this for neatness
} else if (status != Status.StatusRolledBack) { // Added (Ram J) (12/06/2000)
// commit two phase now
// Get the prepare vote from the root Coordinator.
Vote prepareResult = Vote.VoteRollback;
try {
prepareResult = coordinator.prepare();
} catch( HeuristicHazard exc ) {
heuristicExc = exc;
} catch( HeuristicMixed exc ) {
heuristicExc = exc;
} catch( INVALID_TRANSACTION exc ) {
throw exc;
} catch( Throwable exc ) {
}
if( subtransaction ) {
// Depending on the prepare result, commit or abort the transaction.
if( prepareResult == Vote.VoteCommit )
try {
if(_logger.isLoggable(Level.FINE))
{
_logger.logp(Level.FINE,"CoordinatorTerm","commit()",
"Before invoking coordinator.commit() :"+"GTID is: "+
((TopCoordinator)coordinator).superInfo.globalTID.toString());
}
coordinator.commit();
} catch( NotPrepared exc ) {
prepareResult = Vote.VoteRollback;
}
if( prepareResult == Vote.VoteRollback ) {
if(_logger.isLoggable(Level.FINE))
{
_logger.logp(Level.FINE,"CoordinatorTerm","commit()",
"Before invoking coordinator.rollback :"+
"GTID is : "+
((TopCoordinator)coordinator).superInfo.globalTID.toString());
}
coordinator.rollback(true);
status = Status.StatusRolledBack;
}
}
// End of dealing with top-level transactions.
else {
// Depending on the prepare result, commit or abort the transaction.
//$ DO SOMETHING ABOUT PROMPT RETURN */
try {
if( prepareResult == Vote.VoteCommit )
try {
coordinator.commit();
} catch( NotPrepared exc ) {
prepareResult = Vote.VoteRollback;
}
if( prepareResult == Vote.VoteRollback && heuristicExc == null ) {
status = Status.StatusRolledBack; // GDH COPDEF1 Swapped these two lines
coordinator.rollback(true); // (not stricly necessary for problem fix)
}
} catch( Throwable exc ) {
if (exc instanceof HeuristicHazard ||
exc instanceof HeuristicMixed) {
heuristicExc = exc;
}
// ADDED(Ram J) percolate any system exception
// back to the caller.
if (exc instanceof INTERNAL) {
throw (INTERNAL) exc;
}
}
} // end else was top level txn
} // end else used two phase else
// Tell the Coordinator that the transaction has completed (top-level
// transactions only).
if( !subtransaction ) {
((TopCoordinator)coordinator).afterCompletion(status);
}
// Inform the Control object that the transaction has completed.
completed = true;
if( current != null && sameCoordinator )
current.setTranState(status);
// If a heuristic was thrown, throw the exception.
if( heuristicExc != null ) {
if( heuristicExc instanceof HeuristicMixed )
throw (HeuristicMixed)heuristicExc;
else
throw (HeuristicHazard)heuristicExc;
}
// If the transaction was rolled back, raise an exception.
if( status == Status.StatusRolledBack ) {
TRANSACTION_ROLLEDBACK exc = new TRANSACTION_ROLLEDBACK(0,CompletionStatus.COMPLETED_YES);
throw exc;
}
}
/**Informs the object that the transaction is to be rolled back.
* <p>
* Uses a private interface to pass the Terminator's rollback request on to
* the Coordinator.
*
* @param
*
* @return
*
* @exception HeuristicHazard Heuristic action may have been taken by a
* participant in the transaction.
* @exception HeuristicMixed Heuristic action has been taken by a participant
* in the transaction so part of the transaction has
* been committed.
* @exception SystemException An error occurred calling another object.
* @exception LogicErrorException An internal logic error occurred.
*
* @see
*/
void rollback()
throws HeuristicMixed, HeuristicHazard, SystemException,
LogicErrorException {
// If the transaction that this object represents has already been rolled
// back, raise an exception. Note that we cannot raise a heuristic exception
// here as it is not in the OMG interface.
if( aborted ) {
TRANSACTION_ROLLEDBACK exc = new TRANSACTION_ROLLEDBACK(0,CompletionStatus.COMPLETED_NO);
throw exc;
}
// If there is no Coordinator reference, raise an exception.
if( coordinator == null ) {
String msg = LogFormatter.getLocalizedMessage(_logger,
"jts.no_coordinator_available");
LogicErrorException exc =
new LogicErrorException(msg);
throw exc;
}
// Remember that it is us that have initiated the completion so that we can
// ignore the aborted operation if it happens subsequently.
Coordinator currentCoord = null;
ControlImpl current = null;
completing = true;
// End the association of the current Control object with the current thread
// if it is the same transaction as the one being committed.
try {
current = CurrentTransaction.getCurrent();
} catch( Throwable exc ) {}
if( current != null )
try {
if (Configuration.isLocalFactory()) {
currentCoord = current.get_localCoordinator();
} else {
currentCoord = current.get_coordinator();
}
if( coordinator.is_same_transaction(currentCoord) )
CurrentTransaction.endCurrent(true);
}
// If an exception was raised, it must be because the transaction that the
// current Control object represents was rolled back. In that case, always
// end the current thread association.
catch( Throwable exc ) {
CurrentTransaction.endCurrent(true);
}
// Rollback the transaction and inform synchronisation objects.
Throwable heuristicExc = null;
try {
coordinator.rollback(true);
}
catch (Throwable exc) {
if (exc instanceof HeuristicHazard ||
exc instanceof HeuristicMixed) {
heuristicExc = exc;
}
// ADDED (Ram J) percolate any system exception to the caller
if (exc instanceof INTERNAL) {
throw (INTERNAL) exc;
}
} finally {
if( !subtransaction )
((TopCoordinator)coordinator).afterCompletion(Status.StatusRolledBack);
}
// Inform the Control object that the transaction has completed.
completed = true;
if( current != null )
current.setTranState(Status.StatusRolledBack);
// If a heuristic was thrown, throw the exception.
if( heuristicExc != null ) {
if( heuristicExc instanceof HeuristicMixed )
throw (HeuristicMixed)heuristicExc;
else
throw (HeuristicHazard)heuristicExc;
}
// Otherwise return normally.
}
/**Informs the CoordinatorTerm object that the transaction it represents
* has completed.
* <p>
* Flags indicate whether the transaction aborted, and
* whether there was heuristic damage.
* <p>
* This operation is invoked by a Coordinator when it is rolled back,
* potentially by a caller other than the CoordinatorTerm itself. In the
* event that it is some other caller, the CoordinatorTerm object performs the
* after rollback synchronisation, and remembers the fact that it has aborted
* for later.
*
* @param aborted Indicates whether the transaction locally aborted.
* @param heuristicDamage Indicates local heuristic damage.
*
* @return
*
* @see
*/
public void setCompleted( boolean aborted,
boolean heuristicDamage ) {
// If the transaction that this object represents has already been rolled
// back, or is being rolled back by this object, just return.
if( !completing ) {
// If there is no Coordinator reference, we cannot do anything. Note that
// CompletionHandler does not permit an exception through this method so we
// cannot throw one.
// Set the flags and distribute after completion operations for the
// transaction.
completed = true;
this.aborted = aborted;
this.heuristicDamage = heuristicDamage;
if( coordinator == null ) {
} else if( !subtransaction )
((TopCoordinator)coordinator).afterCompletion(Status.StatusRolledBack);
}
}
/**Dumps the state of the object.
*
* @param
*
* @return
*
* @see
*/
void dump() {
}
}
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