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/**
* Copyright (C) 2000-2010 Atomikos
*
* This code ("Atomikos TransactionsEssentials"), by itself,
* is being distributed under the
* Apache License, Version 2.0 ("License"), a copy of which may be found at
* http://www.atomikos.com/licenses/apache-license-2.0.txt .
* You may not use this file except in compliance with the License.
*
* While the License grants certain patent license rights,
* those patent license rights only extend to the use of
* Atomikos TransactionsEssentials by itself.
*
* This code (Atomikos TransactionsEssentials) contains certain interfaces
* in package (namespace) com.atomikos.icatch
* (including com.atomikos.icatch.Participant) which, if implemented, may
* infringe one or more patents held by Atomikos.
* It should be appreciated that you may NOT implement such interfaces;
* licensing to implement these interfaces must be obtained separately from Atomikos.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*/
package com.atomikos.icatch.imp;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Stack;
import java.util.Vector;
import com.atomikos.icatch.DataSerializable;
import com.atomikos.icatch.HeurCommitException;
import com.atomikos.icatch.HeurHazardException;
import com.atomikos.icatch.HeurMixedException;
import com.atomikos.icatch.HeurRollbackException;
import com.atomikos.icatch.HeuristicMessage;
import com.atomikos.icatch.Participant;
import com.atomikos.icatch.RollbackException;
import com.atomikos.icatch.SysException;
import com.atomikos.icatch.TxState;
import com.atomikos.thread.InterruptedExceptionHelper;
import com.atomikos.util.ClassLoadingHelper;
/**
* A state handler for the heuristic hazard coordinator state.
*/
public class HeurHazardStateHandler extends CoordinatorStateHandler
{
private static final long serialVersionUID = 3405983048694149334L;
private Vector hazards_;
public HeurHazardStateHandler() {
}
HeurHazardStateHandler ( CoordinatorImp coordinator )
{
super ( coordinator );
hazards_ = new Vector ();
}
HeurHazardStateHandler ( CoordinatorStateHandler previous ,
Vector hazards )
{
super ( previous );
hazards_ = (Vector) hazards.clone ();
}
HeurHazardStateHandler ( CoordinatorStateHandler previous ,
Hashtable hazards )
{
super ( previous );
hazards_ = new Vector();
hazards_.addAll ( hazards.keySet() );
}
protected void recover ( CoordinatorImp coordinator )
{
super.recover ( coordinator );
// add all recovered participants to the replay stack
// to resume where we left off before the crash,
// and try to notify all hazards
Enumeration enumm = getCoordinator ().getParticipants ().elements ();
while ( enumm.hasMoreElements () ) {
Participant p = (Participant) enumm.nextElement ();
if ( !getReadOnlyTable ().containsKey ( p ) ) {
replayCompletion ( p );
}
} // while
}
protected TxState getState ()
{
return TxState.HEUR_HAZARD;
}
protected void onTimeout ()
{
// this state can only be reached through COMMITTING or ABORTING
// so getCommitted can not be null
// or it can be: cf case 72990
Boolean commitDecided = getCommitted();
boolean committed = false;
addAllForReplay ( hazards_ );
// get Stack to avoid overwriting effects of
// intermediate recovery calls
Stack replayStack = getReplayStack ();
boolean replay = false;
if ( !replayStack.empty () && commitDecided != null ) {
committed = commitDecided.booleanValue ();
replay = true;
int count = replayStack.size ();
TerminationResult result = new TerminationResult ( count );
while ( !replayStack.empty () ) {
Participant part = (Participant) replayStack.pop ();
if ( committed ) {
CommitMessage cm = new CommitMessage ( part, result, false );
getPropagator ().submitPropagationMessage ( cm );
} else {
RollbackMessage rm = new RollbackMessage ( part, result,
true );
getPropagator ().submitPropagationMessage ( rm );
}
}
try {
result.waitForReplies ();
Stack replies = result.getReplies ();
Enumeration enumm = replies.elements ();
while ( enumm.hasMoreElements () ) {
Reply reply = (Reply) enumm.nextElement ();
if ( !reply.hasFailed () ) {
hazards_.remove ( reply.getParticipant () );
}
}
// TODO if overall result failed: check if heuristic state
// should change?
// for instance: if mixed replies -> change state to HEURMIXED
// NOTE: this can happen on recovery with late registration
// where the resource has ended in mixed mode
} catch ( InterruptedException inter ) {
// cf bug 67457
InterruptedExceptionHelper.handleInterruptedException ( inter );
// return silently;
// worst case is some remaining indoubt participants
}
}
if ( hazards_.isEmpty () ) {
TerminatedStateHandler termStateHandler = new TerminatedStateHandler (
this );
getCoordinator ().setStateHandler ( termStateHandler );
} else if ( replay ) {
// set state to heuristic again, to
// notify logging of swapout.
// note: only do this if something could have changed such as in replay
getCoordinator ().setStateHandler ( this );
}
}
protected void setGlobalSiblingCount ( int count )
{
// nothing to do here
}
protected int prepare () throws RollbackException,
java.lang.IllegalStateException, HeurHazardException,
HeurMixedException, SysException
{
throw new HeurHazardException ( getHeuristicMessages () );
}
protected HeuristicMessage[] commit ( boolean onePhase )
throws HeurRollbackException, HeurMixedException,
HeurHazardException, java.lang.IllegalStateException,
RollbackException, SysException
{
throw new HeurHazardException ( getHeuristicMessages () );
}
protected HeuristicMessage[] rollback () throws HeurCommitException,
HeurMixedException, SysException, HeurHazardException,
java.lang.IllegalStateException
{
throw new HeurHazardException ( getHeuristicMessages () );
}
@Override
public void writeData(DataOutput out) throws IOException {
super.writeData(out);
out.writeInt(hazards_.size() );
for (Participant participant : hazards_) {
out.writeUTF(participant.getClass().getName());
((DataSerializable)participant ).writeData(out);
}
}
@Override
public void readData(DataInput in) throws IOException {
super.readData(in);
int size = in.readInt();
hazards_=new Vector(size);
for (int i = 0; i < size; i++) {
String participantClassName=in.readUTF();
Participant participant=(Participant)ClassLoadingHelper.newInstance(participantClassName);
((DataSerializable)participant).readData(in);
hazards_.add(participant);
}
}
}
