/**
* Copyright (C) 2000-2012 Atomikos <info@atomikos.com>
*
* 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 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.icatch.imp.thread.InterruptedExceptionHelper;
import com.atomikos.util.SerializationUtils;
/**
* A state handler for the heuristic mixed coordinator state.
*/
public class HeurMixedStateHandler extends CoordinatorStateHandler
{
private Hashtable<Participant,TxState> hazards_;
public HeurMixedStateHandler() {
}
HeurMixedStateHandler ( CoordinatorImp coordinator )
{
super ( coordinator );
hazards_ = new Hashtable<Participant,TxState> ();
}
HeurMixedStateHandler ( CoordinatorStateHandler previous , Hashtable<Participant,TxState> hazards )
{
super ( previous );
hazards_ = (Hashtable<Participant,TxState>) hazards.clone ();
}
protected TxState getState ()
{
return TxState.HEUR_MIXED;
}
protected void onTimeout ()
{
// this state can only be reached through COMMITTING or ABORTING
// so getCommitted can not be null
Boolean commitDecided = getCommitted();
//replay does remove -> re-add hazards each time
addAllForReplay ( hazards_.keySet() );
Stack replayStack = getReplayStack ();
boolean replay = false;
if ( !replayStack.empty () && commitDecided != null ) {
boolean 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 ();
// remove OK replies from hazards_ list and change state if
// hazard_ is empty.
Stack replies = result.getReplies ();
Enumeration enumm = replies.elements ();
while ( enumm.hasMoreElements () ) {
Reply reply = (Reply) enumm.nextElement ();
if ( !reply.hasFailed () ) {
hazards_.remove ( reply.getParticipant () );
}
}
if ( hazards_.isEmpty () ) {
TerminatedStateHandler termStateHandler = new TerminatedStateHandler (
this );
getCoordinator ().setStateHandler ( termStateHandler );
} else if ( replay ) {
// set state to heuristic again, to notify logging of swapout.
// only do this if replay was true, i.e. if there could be changes
getCoordinator ().setStateHandler ( this );
}
} catch ( InterruptedException inter ) {
// cf bug 67457
InterruptedExceptionHelper.handleInterruptedException ( inter );
// return silently;
// worst case is some remaining indoubt participants
}
}
}
protected void setGlobalSiblingCount ( int count )
{
// nothing to do here
}
protected int prepare () throws RollbackException,
java.lang.IllegalStateException, HeurHazardException,
HeurMixedException, SysException
{
// check heuristic state: during prepare, there can be no global commit
// decision yet.
// therefore, this prepare call is NOT allowed to return anything else
// then a
// heuristic hazard exception.
// thus, no matter what the heuristic really is, report it as hazard.
throw new HeurHazardException ( getHeuristicMessages () );
}
protected HeuristicMessage[] commit ( boolean onePhase )
throws HeurRollbackException, HeurMixedException,
HeurHazardException, java.lang.IllegalStateException,
RollbackException, SysException
{
throw new HeurMixedException ( getHeuristicMessages () );
}
protected HeuristicMessage[] rollback () throws HeurCommitException,
HeurMixedException, SysException, HeurHazardException,
java.lang.IllegalStateException
{
throw new HeurMixedException ( getHeuristicMessages () );
}
@Override
public void writeData(DataOutput out) throws IOException {
super.writeData(out);
byte[] content = SerializationUtils.serialize(hazards_);
out.writeInt(content.length);
out.write(content);
}
@Override
public void readData(DataInput in) throws IOException {
super.readData(in);
byte[] content = new byte [in.readInt()];
in.readFully(content);
hazards_= (Hashtable<Participant,TxState>) SerializationUtils.deserialize(content);
}
}