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com.atomikos.datasource.xa.XAResourceTransaction Maven / Gradle / Ivy
/**
* 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.datasource.xa;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.OptionalDataException;
import java.io.Serializable;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Stack;
import java.util.Vector;
import javax.transaction.xa.XAException;
import javax.transaction.xa.XAResource;
import javax.transaction.xa.Xid;
import com.atomikos.datasource.RecoverableResource;
import com.atomikos.datasource.ResourceException;
import com.atomikos.datasource.ResourceTransaction;
import com.atomikos.icatch.CompositeTransaction;
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.StringHeuristicMessage;
import com.atomikos.icatch.SysException;
import com.atomikos.icatch.TransactionControl;
import com.atomikos.icatch.TxState;
import com.atomikos.icatch.system.Configuration;
import com.atomikos.logging.Logger;
import com.atomikos.logging.LoggerFactory;
import com.atomikos.util.SerializationUtils;
/**
*
*
* An implementation of ResourceTransaction for XA transactions.
*/
public class XAResourceTransaction implements ResourceTransaction,
Externalizable, Participant, DataSerializable
{
private static final Logger LOGGER = LoggerFactory.createLogger(XAResourceTransaction.class);
static final long serialVersionUID = -8227293322090019196L;
protected static String interpretErrorCode ( String resourceName , String opCode , Xid xid , int errorCode ) {
String msg = "unkown";
switch ( errorCode ) {
case XAException.XAER_RMFAIL:
msg = "the XA resource has become unavailable";
break;
case XAException.XA_RBROLLBACK:
msg = "the XA resource has rolled back for an unspecified reason";
break;
case XAException.XA_RBCOMMFAIL:
msg = "the XA resource rolled back due to a communication failure";
break;
case XAException.XA_RBDEADLOCK:
msg = "the XA resource has rolled back because of a deadlock";
break;
case XAException.XA_RBINTEGRITY:
msg = "the XA resource has rolled back due to a constraint violation";
break;
case XAException.XA_RBOTHER:
msg = "the XA resource has rolled back for an unknown reason";
break;
case XAException.XA_RBPROTO:
msg = "the XA resource has rolled back because it did not expect this command in the current context";
break;
case XAException.XA_RBTIMEOUT:
msg = "the XA resource has rolled back because the transaction took too long";
break;
case XAException.XA_RBTRANSIENT:
msg = "the XA resource has rolled back for a temporary reason - the transaction can be retried later";
break;
case XAException.XA_NOMIGRATE:
msg = "XA resume attempted in a different place from where suspend happened";
break;
case XAException.XA_HEURHAZ:
msg = "the XA resource may have heuristically completed the transaction";
break;
case XAException.XA_HEURCOM:
msg = "the XA resource has heuristically committed";
break;
case XAException.XA_HEURRB:
msg = "the XA resource has heuristically rolled back";
break;
case XAException.XA_HEURMIX:
msg = "the XA resource has heuristically committed some parts and rolled back other parts";
break;
case XAException.XA_RETRY:
msg = "the XA command had no effect and may be retried";
break;
case XAException.XA_RDONLY:
msg = "the XA resource had no updates to perform for this transaction";
break;
case XAException.XAER_RMERR:
msg = "the XA resource detected an internal error";
break;
case XAException.XAER_NOTA:
msg = "the supplied XID is invalid for this XA resource";
break;
case XAException.XAER_INVAL:
msg = "invalid arguments were given for the XA operation";
break;
case XAException.XAER_PROTO:
msg = "the XA resource did not expect this command in the current context";
break;
case XAException.XAER_DUPID:
msg = "the supplied XID already exists in this XA resource";
break;
case XAException.XAER_OUTSIDE:
msg = "the XA resource is currently involved in a local (non-XA) transaction";
break;
default: msg = "unknown";
}
return "XA resource '" + resourceName + "': " + opCode + " for XID '" + xidToHexString ( xid ) +
"' raised " + errorCode + ": " + msg;
}
private String tid_ , root_;
private boolean isXaSuspended_;
private TxState state_;
private String resourcename_;
private transient Xid xid_;
private transient String xidToHexString;
private transient String toString;
private void setXid(Xid xid) {
this.xid_ = xid;
xidToHexString= xidToHexString(xid);
toString = "XAResourceTransaction: "+xidToHexString;
}
private transient XATransactionalResource resource_;
private transient XAResource xaresource_;
private Vector heuristicMessages_;
private transient boolean knownInResource;
private transient int timeout_;
public XAResourceTransaction ()
{
// needed for externalization mechanism
}
XAResourceTransaction(XATransactionalResource resource, CompositeTransaction transaction, String root)
{
setResource ( resource );
TransactionControl control = transaction.getTransactionControl ();
if ( control != null ) {
timeout_ = (int) transaction.getTransactionControl ().getTimeout () / 1000;
}
tid_ = transaction.getTid ();
root_ = root;
resourcename_ = resource.getName ();
setXid( resource_.createXid ( tid_ ));
setState ( TxState.ACTIVE );
heuristicMessages_ = new Vector ();
isXaSuspended_ = false;
knownInResource = false;
addHeuristicMessage ( new StringHeuristicMessage ( "XA resource '"
+ resource.getName () + "' accessed with Xid '" + xidToHexString + "'" ) );
}
void setResource ( XATransactionalResource resource )
{
this.resource_ = resource;
}
void setState ( TxState state )
{
this.state_ = state;
}
static String xidToHexString(Xid xid) {
String gtrid = StringUtils.byteArrayToHexString(xid.getGlobalTransactionId());
String bqual = StringUtils.byteArrayToHexString(xid.getBranchQualifier());
return gtrid + ":" + bqual;
}
private void switchToHeuristicState ( String opCode , TxState state , XAException cause )
{
String errorMsg = interpretErrorCode ( resourcename_ , opCode , xid_ , cause.errorCode );
addHeuristicMessage ( new StringHeuristicMessage ( errorMsg ) );
setState ( state );
}
protected void testOrRefreshXAResourceFor2PC () throws XAException
{
try {
//fix for case 31209: refresh entire XAConnection on heur hazard
if ( state_.equals ( TxState.HEUR_HAZARD ) ) forceRefreshXAConnection();
else if ( xaresource_ != null ) { // null if connection failure
xaresource_.isSameRM ( xaresource_ ); // test xa connection for liveness
}
} catch ( XAException xa ) {
// timed out?
if ( LOGGER.isDebugEnabled() ) LOGGER.logDebug ( resourcename_
+ ": XAResource needs refresh", xa );
if ( resource_ == null ) {
// cf bug 67951 - happens on recovery without resource found
throwXAExceptionForUnavailableResource();
} else {
xaresource_ = resource_.getXAResource ();
}
}
}
protected void forceRefreshXAConnection() throws XAException
{
if ( LOGGER.isDebugEnabled() ) LOGGER.logDebug ( resourcename_ + ": forcing refresh of XAConnection..." );
if ( resource_ == null ) {
// cf bug 67951 - happens on recovery without resource found
throwXAExceptionForUnavailableResource();
}
try {
xaresource_ = resource_.refreshXAConnection();
} catch ( ResourceException re ) {
LOGGER.logWarning ( resourcename_ + ": could not refresh XAConnection" , re );
}
}
private void throwXAExceptionForUnavailableResource() throws XAException
{
String msg = resourcename_ + ": resource no longer available - recovery might be at risk!";
LOGGER.logWarning ( msg );
XAException err = new XAException ( msg );
err.errorCode = XAException.XAER_RMFAIL;
throw err;
}
/**
* Needed for garbage collection of res tx instances: if no new siblings can
* arrive, this method removes any pointers to res txs in the resource
*/
private void terminateInResource ()
{
if ( resource_ != null )
resource_.removeSiblingMap ( root_ );
}
public void writeExternal ( ObjectOutput out ) throws IOException
{
out.writeObject ( xid_ );
out.writeObject ( tid_ );
out.writeObject ( root_ );
out.writeObject ( state_ );
// CLONE vector to ensure it gets re-written!
out.writeObject ( heuristicMessages_.clone () );
out.writeObject ( resourcename_ );
if ( xaresource_ instanceof Serializable ) {
// cf case 59238
out.writeObject ( Boolean.TRUE );
out.writeObject ( xaresource_ );
} else {
out.writeObject ( Boolean.FALSE );
}
}
public void readExternal ( ObjectInput in ) throws IOException,
ClassNotFoundException
{
setXid((Xid) in.readObject ());
tid_ = (String) in.readObject ();
root_ = (String) in.readObject ();
state_ = (TxState) in.readObject ();
heuristicMessages_ = (Vector) in.readObject ();
resourcename_ = (String) in.readObject ();
try {
Boolean xaresSerializable = (Boolean) in.readObject();
if (xaresSerializable !=null && xaresSerializable ) {
// cf case 59238
xaresource_ = ( XAResource ) in.readObject();
}
} catch (OptionalDataException e) {
// happens if boolean is missing - like in older logfiles
LOGGER.logDebug ("Ignoring missing field" , e );
}
}
/**
* @see ResourceTransaction.
*/
public String getTid ()
{
return tid_;
}
/**
* @see ResourceTransaction.
*/
public void addHeuristicMessage ( HeuristicMessage mesg )
throws IllegalStateException
{
if(mesg!=null && mesg.toString()!=null){
heuristicMessages_.addElement ( mesg );
}
}
/**
* @see ResourceTransaction.
*/
public HeuristicMessage[] getHeuristicMessages ()
{
HeuristicMessage[] heurArray = new HeuristicMessage[1];
return (HeuristicMessage[]) heuristicMessages_.toArray ( heurArray );
}
/**
* @see ResourceTransaction.
*/
public synchronized void suspend () throws ResourceException
{
Stack errors = new Stack ();
//BugzID: 20545
//State may be IN_DOUBT or TERMINATED when a connection is closed AFTER commit!
//In that case, don't call END again, and also don't generate any error!
//This is required for some hibernate connection release strategies.
if ( state_.equals( ( TxState.ACTIVE ) ) ) {
try {
if(LOGGER.isInfoEnabled()){
LOGGER.logInfo("XAResource.end ( " + xidToHexString
+ " , XAResource.TMSUCCESS ) on resource "
+ resourcename_ + " represented by XAResource instance "
+ xaresource_);
}
xaresource_.end ( xid_, XAResource.TMSUCCESS );
} catch ( XAException xaerr ) {
errors.push ( xaerr );
String msg = interpretErrorCode ( resourcename_ , "end" , xid_ , xaerr.errorCode );
if ( LOGGER.isDebugEnabled() ) LOGGER.logDebug ( msg, xaerr );
throw new ResourceException ( msg, errors );
}
setState ( TxState.LOCALLY_DONE );
}
}
boolean supportsTmJoin() {
return !(resource_.usesWeakCompare() ||
resource_.acceptsAllXAResources () ||
isActive());
}
/**
* @see ResourceTransaction.
*/
public synchronized void resume () throws ResourceException
{
int flag = 0;
Stack errors = new Stack ();
String logFlag = "";
if ( state_.equals ( TxState.LOCALLY_DONE ) ) {// reused instance
flag = XAResource.TMJOIN;
logFlag = "XAResource.TMJOIN";
} else if ( !knownInResource ) {// new instance
flag = XAResource.TMNOFLAGS;
logFlag = "XAResource.TMNOFLAGS";
} else
throw new IllegalStateException ( "Wrong state for resume: "
+ state_ );
try {
if(LOGGER.isInfoEnabled()){
LOGGER.logInfo("XAResource.start ( " + xidToHexString + " , " + logFlag
+ " ) on resource " + resourcename_
+ " represented by XAResource instance " + xaresource_);
}
xaresource_.start ( xid_, flag );
} catch ( XAException xaerr ) {
String msg = interpretErrorCode ( resourcename_ , "resume" , xid_ , xaerr.errorCode );
LOGGER.logWarning ( msg ,
xaerr );
errors.push ( xaerr );
throw new ResourceException ( msg ,
errors );
}
setState ( TxState.ACTIVE );
knownInResource = true;
}
/**
* @see Participant
*/
public void setCascadeList ( java.util.Dictionary allParticipants )
throws SysException
{
// nothing to do: local participant
}
public Object getState ()
{
return state_;
}
/**
* @see Participant
*/
public boolean recover () throws SysException
{
boolean recovered = false;
// perform extra initialization
if ( beforePrepare() ) {
//see case 23364: recovery before prepare should do nothing
//and certainly not reset the xaresource
return false;
}
recovered = tryRecoverWithEveryResourceToEnsureOurXidIsNotEndedByPresumedAbort();
if ( !recovered && getXAResource() != null ) {
// cf case 59238: support serializable XAResource
recovered = true;
}
if (recovered) knownInResource = true;
return recovered;
}
private boolean beforePrepare() {
return TxState.ACTIVE.equals ( state_ ) || TxState.LOCALLY_DONE.equals ( state_ );
}
/**
* Recovered XIDs can be shared in two resources
* if they connect to the same back-end RM
* (remember: we use the TM name for the branch!)
* So each resource needs to know that our Xid
* can be recovered, or endRecovery in one of them
* will incorrectly rollback.
*
* @return True iff at least one resource was found that recovers this instance.
*/
private boolean tryRecoverWithEveryResourceToEnsureOurXidIsNotEndedByPresumedAbort() {
boolean ret = false;
Enumeration resources = Configuration.getResources ();
while ( resources.hasMoreElements () ) {
RecoverableResource res = (RecoverableResource) resources.nextElement ();
if ( res.recover ( this ) ) {
ret = true;
}
}
return ret;
}
/**
* @see Participant
*/
public void setGlobalSiblingCount ( int count )
{
// nothing to be done here
}
/**
* @see Participant
*/
public synchronized void forget ()
{
terminateInResource ();
try {
if ( xaresource_ != null ) { // null if recovery failed
xaresource_.forget ( xid_ );
}
} catch ( Exception err ) {
LOGGER.logDebug ( "Error forgetting xid: " + xid_ , err );
// we don't care here
}
setState ( TxState.TERMINATED );
}
/**
* @see Participant
*/
public synchronized int prepare () throws RollbackException,
HeurHazardException, HeurMixedException, SysException
{
int ret = 0;
Stack errors = new Stack ();
terminateInResource ();
if ( TxState.ACTIVE.equals ( state_ ) ) {
// tolerate non-delisting apps/servers
suspend ();
}
// duplicate prepares can happen for siblings in serial subtxs!!!
// in that case, the second prepare just returns READONLY
if ( state_.equals ( TxState.IN_DOUBT ) )
return Participant.READ_ONLY;
else if ( !state_.equals ( TxState.LOCALLY_DONE ) )
throw new SysException ( "Wrong state for prepare: " + state_ );
try {
// refresh xaresource for MQSeries: seems to close XAResource after suspend???
testOrRefreshXAResourceFor2PC ();
if(LOGGER.isDebugEnabled()){
LOGGER.logDebug( "About to call prepare on XAResource instance: "
+ xaresource_);
}
ret = xaresource_.prepare ( xid_ );
} catch ( XAException xaerr ) {
String msg = interpretErrorCode ( resourcename_ , "prepare" , xid_ , xaerr.errorCode );
LOGGER.logWarning ( msg , xaerr ); // see case 84253
if ( (XAException.XA_RBBASE <= xaerr.errorCode)
&& (xaerr.errorCode <= XAException.XA_RBEND) ) {
throw new RollbackException ( msg );
} else {
errors.push ( xaerr );
throw new SysException ( msg , errors );
}
}
setState ( TxState.IN_DOUBT );
if ( ret == XAResource.XA_RDONLY ) {
if(LOGGER.isInfoEnabled()){
LOGGER.logInfo("XAResource.prepare ( " + xidToHexString
+ " ) returning XAResource.XA_RDONLY " + "on resource "
+ resourcename_ + " represented by XAResource instance "
+ xaresource_);
}
return Participant.READ_ONLY;
} else {
if(LOGGER.isInfoEnabled()){
LOGGER.logInfo("XAResource.prepare ( " + xidToHexString + " ) returning OK "
+ "on resource " + resourcename_
+ " represented by XAResource instance " + xaresource_);
}
return Participant.READ_ONLY + 1;
}
}
/**
* @see Participant.
*/
public synchronized HeuristicMessage[] rollback ()
throws HeurCommitException, HeurMixedException,
HeurHazardException, SysException
{
Stack errors = new Stack ();
terminateInResource ();
if ( rollbackShouldDoNothing() ) {
return null;
}
if ( state_.equals ( TxState.TERMINATED ) ) {
return getHeuristicMessages ();
}
if ( state_.equals ( TxState.HEUR_MIXED ) )
throw new HeurMixedException ( getHeuristicMessages () );
if ( state_.equals ( TxState.HEUR_COMMITTED ) )
throw new HeurCommitException ( getHeuristicMessages () );
if ( xaresource_ == null ) { // if recover failed
LOGGER.logWarning ( "XAResourceTransaction " + getXid ()
+ ": no XAResource to rollback - the required resource is probably not yet intialized?" );
throw new HeurHazardException ( getHeuristicMessages () );
}
try {
if ( state_.equals ( TxState.ACTIVE ) ) { // first suspend xid
suspend ();
}
// refresh xaresource for MQSeries: seems to close XAResource after suspend???
testOrRefreshXAResourceFor2PC ();
if(LOGGER.isInfoEnabled()){
LOGGER.logInfo("XAResource.rollback ( " + xidToHexString + " ) "
+ "on resource " + resourcename_
+ " represented by XAResource instance " + xaresource_);
}
xaresource_.rollback ( xid_ );
} catch ( ResourceException resErr ) {
// failure of suspend
errors.push ( resErr );
throw new SysException ( "Error in rollback: "
+ resErr.getMessage (), errors );
} catch ( XAException xaerr ) {
String msg = interpretErrorCode ( resourcename_ , "rollback" , xid_ , xaerr.errorCode );
if ( (XAException.XA_RBBASE <= xaerr.errorCode)
&& (xaerr.errorCode <= XAException.XA_RBEND) ) { // do nothing, corresponds with semantics of rollback
if ( LOGGER.isDebugEnabled() ) LOGGER.logDebug ( msg );
} else {
LOGGER.logWarning ( msg , xaerr );
switch ( xaerr.errorCode ) {
case XAException.XA_HEURHAZ:
switchToHeuristicState ( "rollback" , TxState.HEUR_HAZARD , xaerr );
throw new HeurHazardException ( getHeuristicMessages() );
case XAException.XA_HEURMIX:
switchToHeuristicState ( "rollback" , TxState.HEUR_MIXED , xaerr );
throw new HeurMixedException ( getHeuristicMessages () );
case XAException.XA_HEURCOM:
switchToHeuristicState ( "rollback", TxState.HEUR_COMMITTED , xaerr );
throw new HeurCommitException ( getHeuristicMessages () );
case XAException.XA_HEURRB:
forget ();
break;
case XAException.XAER_NOTA:
//see case 21552
if(LOGGER.isDebugEnabled()){
LOGGER.logDebug("XAResource.rollback: invalid Xid - already rolled back in resource?");
}
setState ( TxState.TERMINATED );
//ignore error - corresponds to semantics of rollback!
break;
default:
//fix for bug 31209
switchToHeuristicState( "rollback", TxState.HEUR_HAZARD , xaerr );
errors.push ( xaerr );
throw new SysException ( msg , errors );
}
}
}
setState ( TxState.TERMINATED );
return getHeuristicMessages ();
}
private boolean rollbackShouldDoNothing() {
return !knownInResource && beforePrepare();
}
/**
* @see Participant
*/
public synchronized HeuristicMessage[] commit ( boolean onePhase )
throws HeurRollbackException, HeurHazardException,
HeurMixedException, RollbackException, SysException
{
Stack errors = new Stack ();
terminateInResource ();
if ( state_.equals ( TxState.TERMINATED ) )
return getHeuristicMessages ();
if ( state_.equals ( TxState.HEUR_MIXED ) )
throw new HeurMixedException ( getHeuristicMessages () );
if ( state_.equals ( TxState.HEUR_ABORTED ) )
throw new HeurRollbackException ( getHeuristicMessages () );
if ( xaresource_ == null ) { // null if recovery failed
LOGGER.logWarning ( "XAResourceTransaction " + getXid ()
+ ": no XAResource to commit - the required resource is probably not yet intialized?" );
throw new HeurHazardException ( getHeuristicMessages () );
}
try {
if ( TxState.ACTIVE.equals ( state_ ) ) { // tolerate non-delisting apps/servers
suspend ();
}
} catch ( ResourceException re ) {
// happens if already rolled back or something else;
// in any case the transaction can be trusted to act
// as if rollback already happened
throw new com.atomikos.icatch.RollbackException ( re.getMessage () );
}
if ( !(state_.equals ( TxState.LOCALLY_DONE ) || state_
.equals ( TxState.IN_DOUBT ) || state_.equals ( TxState.HEUR_HAZARD )) )
throw new SysException ( "Wrong state for commit: " + state_ );
try {
// refresh xaresource for MQSeries: seems to close XAResource after suspend???
testOrRefreshXAResourceFor2PC ();
if(LOGGER.isInfoEnabled()){
LOGGER.logInfo("XAResource.commit ( " + xidToHexString + " , " + onePhase
+ " ) on resource " + resourcename_
+ " represented by XAResource instance " + xaresource_);
}
xaresource_.commit ( xid_, onePhase );
} catch ( XAException xaerr ) {
String msg = interpretErrorCode ( resourcename_ , "commit" , xid_ , xaerr.errorCode );
LOGGER.logWarning ( msg , xaerr );
if ( (XAException.XA_RBBASE <= xaerr.errorCode)
&& (xaerr.errorCode <= XAException.XA_RBEND) ) {
errors.push ( xaerr );
if ( !onePhase )
throw new SysException ( msg , errors );
else
throw new com.atomikos.icatch.RollbackException (
"Already rolled back in resource." );
} else {
switch ( xaerr.errorCode ) {
case XAException.XA_HEURHAZ:
switchToHeuristicState ( "commit" , TxState.HEUR_HAZARD , xaerr );
throw new HeurHazardException ( getHeuristicMessages () );
case XAException.XA_HEURMIX:
switchToHeuristicState ( "commit", TxState.HEUR_MIXED , xaerr );
throw new HeurMixedException ( getHeuristicMessages () );
case XAException.XA_HEURCOM:
forget ();
break;
case XAException.XA_HEURRB:
switchToHeuristicState ( "commit", TxState.HEUR_ABORTED , xaerr );
throw new HeurRollbackException ( getHeuristicMessages () );
case XAException.XAER_NOTA:
if ( ! onePhase ) {
//see case 21552
LOGGER.logWarning("XAResource.commit: invalid Xid - transaction already committed in resource?");
setState ( TxState.TERMINATED );
break;
}
default:
//fix for bug 31209
switchToHeuristicState( "commit", TxState.HEUR_HAZARD , xaerr );
errors.push ( xaerr );
throw new SysException ( msg , errors );
}
}
}
setState ( TxState.TERMINATED );
return getHeuristicMessages ();
}
/**
* Absolutely necessary for coordinator to work correctly
*/
public boolean equals ( Object o )
{
if (this==o) return true;
// NOTE: basing equals on the xid means that if two
// different instances for the same xid exist then these
// will be considered the same, and a second will
// NOT be added to the coordinator's participant list.
// However, this is not a problem, since the first added instance
// will do all commit work (they are equivalent).
// Note that this can ONLY happen for two invocations of the
// SAME local composite transaction to the SAME resource.
// Because INSIDE ONE local transaction there is no
// internal parallellism, having two invocations to the same
// resource execute with the same xid is not a problem.
if (!(o instanceof XAResourceTransaction)) return false;
XAResourceTransaction other = (XAResourceTransaction) o;
return xid_.equals ( other.xid_ );
}
/**
* Absolutely necessary for coordinator to work correctly
*/
public int hashCode ()
{
return xidToHexString.hashCode();
}
public String toString ()
{
return toString;
}
/**
* Get the Xid. Needed by jta mappings.
*
* @return Xid The Xid of this restx.
*/
public Xid getXid ()
{
return xid_;
}
protected void setRecoveredXAResource ( XAResource xaresource )
{
// See case 25671: only reset xaresource if NOT enlisted!
// Otherwise, the delist will fail since XA does not allow
// enlist/delist on different xaresource instances.
// This should not interfere with recovery since a recovered
// instance will NOT have state ACTIVE...
if ( ! TxState.ACTIVE.equals ( state_ ) ) {
setXAResource ( xaresource );
}
}
/**
* Set the XAResource attribute.
*
* @param xaresource
* The new XAResource to use. This new XAResource represents the
* new connection to the XA database. Necessary because on reuse,
* the old xaresource may be in use by another thread, for
* another transaction.
*/
public void setXAResource ( XAResource xaresource )
{
if ( LOGGER.isDebugEnabled() ) LOGGER.logDebug ( this + ": about to switch to XAResource " + xaresource );
xaresource_ = xaresource;
try {
xaresource_.setTransactionTimeout ( timeout_ );
} catch ( XAException e ) {
String msg = interpretErrorCode ( resourcename_ , "setTransactionTimeout" , xid_ , e.errorCode );
LOGGER.logWarning ( msg , e );
// we don't care
}
if ( LOGGER.isDebugEnabled() ) LOGGER.logDebug ( "XAResourceTransaction " + getXid() + ": switched to XAResource " + xaresource );
}
/**
* Perform an XA suspend.
*/
public void xaSuspend () throws XAException
{
// cf case 61305: make XA suspend idempotent so appserver suspends do not interfere with our suspends (triggered by transaction suspend)
if ( !isXaSuspended_ ) {
try {
if(LOGGER.isInfoEnabled()){
LOGGER.logInfo("XAResource.suspend ( " + xidToHexString
+ " , XAResource.TMSUSPEND ) on resource "
+ resourcename_ + " represented by XAResource instance "
+ xaresource_);
}
xaresource_.end ( xid_, XAResource.TMSUSPEND );
isXaSuspended_ = true;
}
catch ( XAException xaerr ) {
String msg = interpretErrorCode ( resourcename_ , "suspend" , xid_ , xaerr.errorCode );
LOGGER.logWarning ( msg , xaerr );
throw xaerr;
}
}
}
/**
* Perform an xa resume
*/
public void xaResume () throws XAException
{
try {
if(LOGGER.isInfoEnabled()){
LOGGER.logInfo("XAResource.start ( " + xidToHexString
+ " , XAResource.TMRESUME ) on resource "
+ resourcename_ + " represented by XAResource instance "
+ xaresource_);
}
xaresource_.start ( xid_, XAResource.TMRESUME );
isXaSuspended_ = false;
}
catch ( XAException xaerr ) {
String msg = interpretErrorCode ( resourcename_ , "resume" , xid_ , xaerr.errorCode );
LOGGER.logWarning ( msg , xaerr );
throw xaerr;
}
}
/**
* Test if the resource has been ended with TMSUSPEND.
*
* @return boolean True if so.
*/
public boolean isXaSuspended ()
{
return isXaSuspended_;
}
/**
* Test if the restx is active (in use).
*
* @return boolean True if so.
*/
public boolean isActive ()
{
return state_.equals ( TxState.ACTIVE );
}
/**
* @see com.atomikos.icatch.Participant#getURI()
*/
public String getURI ()
{
return null;
}
String getResourceName()
{
return resourcename_;
}
XAResource getXAResource()
{
return xaresource_;
}
public void writeData(DataOutput out) throws IOException {
byte[] data= SerializationUtils.serialize((Serializable)xid_);
out.writeInt(data.length);
out.write(data);
out.writeUTF(tid_);
out.writeUTF(root_);
out.writeUTF(state_.toString());
out.writeUTF(resourcename_);
out.writeInt(heuristicMessages_.size());
for (Iterator iterator = heuristicMessages_.iterator(); iterator.hasNext();) {
HeuristicMessage heuristicMessage = (HeuristicMessage) iterator.next();
out.writeUTF(heuristicMessage.toString());
}
if (xaresource_ instanceof Serializable) {
// cf case 59238
out.writeBoolean(true);
byte[] bytes = SerializationUtils.serialize((Serializable) xaresource_);
out.writeInt(bytes.length);
out.write(bytes);
} else {
out.writeBoolean(false);
}
}
public void readData(DataInput in) throws IOException {
// xid_ ???
//String branchQualifier = in.readUTF();
int len = in.readInt();
byte[] data= new byte[len];
in.readFully(data);
xid_= SerializationUtils.deserialize(data);
tid_ = in.readUTF();
setXid(xid_);
root_ = in.readUTF();
state_ = TxState.valueOf(in.readUTF());
resourcename_ = in.readUTF();
int nbMessages = in.readInt();
heuristicMessages_ = new Vector(nbMessages);
for (int i = 0; i < nbMessages; i++) {
heuristicMessages_.add(new StringHeuristicMessage(in.readUTF()));
}
boolean xaresourceSerializable = in.readBoolean();
if (xaresourceSerializable) {
int size = in.readInt();
byte[] bytes = new byte[size];
in.readFully(bytes);
xaresource_ = SerializationUtils.deserialize(bytes);
}
}
}
