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JOTM: Java Open Transaction Manager - Core
/*
* @(#) TransactionImpl.java
*
* JOTM: Java Open Transaction Manager
*
*
* This module was originally developed by
*
* - Bull S.A. as part of the JOnAS application server code released in
* July 1999 (www.bull.com)
*
* --------------------------------------------------------------------------
* The original code and portions created by Bull SA are
* Copyright (c) 1999 BULL SA
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* -Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* -Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* --------------------------------------------------------------------------
* Contributor(s):
* 01/11/06 Christophe Ney [email protected]
* Added ResourceManagerListener mechanism to remove ThreadData
* dependency.
*
* 02/01/15 Dean Jennings - List instead of Vector for enlistedXARes delistedXARes
*
* 02/06/18 Marek Prochazka - in timeoutExpired() removed code
* preventing deadlock by rolling back transaction
* --------------------------------------------------------------------------
* $Id: TransactionImpl.java,v 1.51 2006-09-07 00:18:41 tonyortiz Exp $
* --------------------------------------------------------------------------
*/
package org.objectweb.jotm;
import java.rmi.NoSuchObjectException;
import java.rmi.RemoteException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.HashMap;
import java.util.Map;
import javax.rmi.PortableRemoteObject;
import javax.transaction.Status;
import javax.transaction.Synchronization;
import javax.transaction.Transaction;
import javax.transaction.HeuristicMixedException;
import javax.transaction.HeuristicRollbackException;
import javax.transaction.RollbackException;
import javax.transaction.SystemException;
import javax.transaction.TransactionRolledbackException;
import javax.transaction.xa.XAException;
import javax.transaction.xa.XAResource;
/**
* TransactionImpl is the implementation of the Transaction interface,
* defined in JTA specifications. This object is intended to be used
* by the EJBServer for transaction management. It is used indirectly
* by the UserTransaction implementation too, i.e. the Current object.
* The goal is to use the JTA interface to hide the JTM interface to
* the caller (EJBServer, Bean or Client).
*/
public class TransactionImpl implements Transaction, TimerEventListener {
private SubCoordinator subcoord = null;
private TransactionContext myCtx = null;
private Xid myXid = null;
private boolean genXidhashcode = false;
private boolean genXidtostring = false;
private int myXidhashcode = 0;
private String myXidtostring = null;
private Date txDate = null;
private TimerEvent timer = null; // keep this to unvalidate timer
private RecoveryCoordinator recoveryCoord = null;
/**
* enlisted XAresources
*/
private List enlistedXARes = Collections.synchronizedList(new ArrayList());
/**
* suspended XAresources
*/
private List delistedXARes = null;
/**
* propagate context or not.
* No need to propagate Context when accessing TM for example
* TODO Add a synchro on this object.
*/
private boolean propagateCtx = true;
private List enlistedJavaxXid =
Collections.synchronizedList(new ArrayList());
private Map userResourceMap = null;
/**
* Actual Status is kept inside SubCoordinator.
* This one is used only when SubCoordinator does not exist.
*/
private int localstatus = Status.STATUS_ACTIVE;
private boolean toremove = false;
// ------------------------------------------------------------------
// Constructors
// ------------------------------------------------------------------
/**
* New transaction (begin).
* @param xid transaction Xid
* @param timeout The value of the timeout in seconds.
* @throws SystemException could not build Transaction Context
*/
public TransactionImpl(Xid xid, int timeout) throws SystemException {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("xid= " + xid);
TraceTm.jta.debug("timeout= " + timeout);
}
// Build a propagation context local (no ref to JTM yet)
myXid = xid;
myCtx = new InternalTransactionContext(timeout, null, xid);
}
/**
* New Transaction for this thread (setPropagationContext)
* @param pctx propagation context
*
*/
public TransactionImpl(TransactionContext pctx) {
if (pctx == null) {
TraceTm.jotm.error("TransactionImpl: null PropagationContext");
return;
}
myCtx = pctx;
myXid = pctx.getXid();
// Make interposition in any case, to solve problems of memory leaks
// and bad transaction count, in case no resource will be implied.
// -> this make sure that commit will remove this object.
try {
makeSubCoord(true, true);
} catch (RollbackException e) {
toremove= true;
TraceTm.jotm.debug("already rolled back");
localstatus = Status.STATUS_ROLLEDBACK;
} catch (SystemException e) {
toremove= true;
TraceTm.jotm.error("cannot make subcoordinator");
localstatus = Status.STATUS_ROLLEDBACK;
}
}
// ------------------------------------------------------------------
// Transaction Synchronization Registry implementation
// ------------------------------------------------------------------
/**
* Save User Resource
* @param key object
* @param value object
*/
public synchronized void putUserResource(Object key, Object value) {
if (userResourceMap == null) {
userResourceMap = Collections.synchronizedMap(new HashMap());
}
userResourceMap.put(key, value);
}
/**
* Get User Resource
* @param key object
* @return Object object
*/
public synchronized Object getUserResource(Object key) {
if (userResourceMap == null)
return null;
return userResourceMap.get(key);
}
/**
* Register InterposedSynchronization
* @param sync synchronization
* @throws IllegalStateException could not register synchronization
*/
public void registerInterposedSynchronization(Synchronization sync) throws IllegalStateException {
try {
registerSynchronization(sync);
} catch (Exception e) {
throw new IllegalStateException();
}
}
// ------------------------------------------------------------------
// Transaction implementation
// ------------------------------------------------------------------
/**
* Complete the transaction represented by this Transaction object
* The calling thread is not required to have the same transaction
* associated with the thread. (JTA 3.3.3)
*
* @exception RollbackException Thrown to indicate that
* the transaction has been rolled back rather than committed.
*
* @exception HeuristicMixedException Thrown to indicate that a heuristic
* decision was made and that some relevant updates have been committed
* while others have been rolled back.
*
* @exception HeuristicRollbackException Thrown to indicate that a
* heuristic decision was made and that some relevant updates have been
* rolled back.
*
* @exception SecurityException Thrown to indicate that the thread is
* not allowed to commit the transaction.
*
* @exception IllegalStateException Thrown if the current thread is
* not associated with a transaction.
*
* @exception SystemException Thrown if the transaction manager
* encounters an unexpected error condition
*/
public void commit()
throws
RollbackException,
HeuristicMixedException,
HeuristicRollbackException,
SecurityException,
SystemException {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("TransactionImpl.commit (tx= " + this +")");
}
// *** Distributed transaction.
Terminator term = myCtx.getTerminator();
if (term != null) {
// Commits the Transaction, with heuristic report
try {
propagateCtx = false;
term.commit(true);
} catch (TransactionRolledbackException e) {
Current.getCurrent().forgetTx(getXid());
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("Commit distributed transaction -> rolled back!");
}
localstatus = Status.STATUS_ROLLEDBACK;
throw new RollbackException();
} catch (RemoteException e) {
if (TraceTm.jta.isWarnEnabled()) {
TraceTm.jta.warn("got a RemoteException", e);
}
if (e.detail instanceof TransactionRolledbackException) {
Current.getCurrent().forgetTx(getXid());
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("Commit distributed transaction -> rolled back!");
}
localstatus = Status.STATUS_ROLLEDBACK;
throw new RollbackException();
}
if (e.detail instanceof HeuristicMixed) {
TraceTm.jotm.info("Commit distributed transaction -> Heuristic mixed!");
throw new HeuristicMixedException();
} else {
throw new SystemException(
"Unexpected RemoteException on commit:"
+ e.detail.getMessage());
}
} catch (Exception e) {
TraceTm.jotm.error("Unexpected Exception on commit:", e);
throw new SystemException("Unexpected Exception on commit");
} finally {
propagateCtx = true;
if (subcoord == null) {
// if no coordinator, timer will not be unset by JTM.
unsetTimer();
}
}
Current.getCurrent().forgetTx(getXid());
localstatus = Status.STATUS_COMMITTED;
return;
}
// *** Local transaction
// commit_one_phase may raise remote exceptions. We must rethrow local exceptions.
if (subcoord != null) {
try {
subcoord.commit_one_phase();
} catch (TransactionRolledbackException e) {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("Commit local transaction -> rolled back!");
}
Current.getCurrent().forgetTx(getXid());
localstatus = Status.STATUS_ROLLEDBACK;
throw new RollbackException();
} catch (RemoteException e) {
TraceTm.jotm.error(
"Unexpected Exception on commit_one_phase:",
e);
Current.getCurrent().forgetTx(getXid());
localstatus = Status.STATUS_UNKNOWN;
throw new SystemException("Unexpected Exception on commit_one_phase");
}
} else {
// if no coordinator, just unset the timer and release this object.
unsetTimer();
Current.getCurrent().forgetTx(getXid());
localstatus = Status.STATUS_COMMITTED;
}
}
/**
* Delist the resource specified from the current transaction
* associated with the calling thread.
*
* @param xares The XAResource object representing the resource to delist
*
* @param flag One of the values of TMSUCCESS, TMSUSPEND, or TMFAIL.
*
* @exception IllegalStateException Thrown if the transaction in the
* target object is inactive.
*
* @exception SystemException Thrown if the transaction manager
* encounters an unexpected error condition
*
* @return true if the dissociation of the Resource is successful;
* false otherwise.
*/
public boolean delistResource(XAResource xares, int flag)
throws IllegalStateException, SystemException {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("TransactionImpl.delistResource");
TraceTm.jta.debug("xares= " + xares + ", flag= " + flag);
}
if (enlistedXARes == null) {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.error("No XA resources enlisted by JOTM");
}
return false;
}
// Verify that the XAResource to be delisted was enlisted earlier.
if (!enlistedXARes.contains(xares)) {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.error("XAResouce " + xares + " not enlisted by JOTM");
}
return false;
}
javax.transaction.xa.Xid javaxxid = subcoord.getJavaxXid(subcoord.getXaresIndex(xares));
if (!enlistedJavaxXid.contains(javaxxid)) {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.error("XAResouce " + xares + " not enlisted by JOTM");
}
return false;
}
int javaxxidindex = enlistedJavaxXid.indexOf(javaxxid);
javax.transaction.xa.Xid myjavaxxid = enlistedJavaxXid.get(javaxxidindex);
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("delisted with resource= " + xares);
TraceTm.jta.debug("end myjavaxxid= " + myjavaxxid);
}
// Send the XA end to the XAResource
try {
xares.end (myjavaxxid, flag);
} catch (XAException e) {
String error =
"Cannot send XA end:"
+ e
+ " (error code = "
+ e.errorCode
+ ") --"
+ e.getMessage();
TraceTm.jotm.error(error);
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jotm.debug("xares.end= " + xares);
}
throw new SystemException(error);
}
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("enlistedXAres.remove xares= " + xares);
}
/// remove from enlisted list
enlistedXARes.remove(xares);
enlistedJavaxXid.remove(javaxxid);
return true;
}
/**
* Enlist the resource specified with the current transaction
* context of the calling thread
*
* @param xares The XAResource object representing the resource to enlist
*
* @return true if the resource was enlisted successfully; otherwise
* false.
*
* @exception RollbackException Thrown to indicate that
* the transaction has been marked for rollback only.
*
* @exception IllegalStateException Thrown if the transaction in the
* target object is in prepared state or the transaction is inactive.
*
* @exception SystemException Thrown if the transaction manager
* encounters an unexpected error condition
*
*/
public boolean enlistResource(XAResource xares)
throws RollbackException, IllegalStateException, SystemException {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("TransactionImpl.enlistResource");
TraceTm.jta.debug("xares= " + xares);
}
// Check trivial cases
if (xares == null) {
TraceTm.jotm.error("enlistResource: null argument");
throw new SystemException("enlistResource: null argument");
}
if (myCtx == null) {
throw new SystemException("enlistResource: no Transactional Context");
}
// make a subCoordinator object if not existing yet
if (subcoord == null) {
makeSubCoord(false, true);
if (subcoord == null) {
TraceTm.jotm.error(
"enlistResource: could not create subcoordinator");
throw new SystemException("enlistResource: could not create subcoordinator");
}
}
boolean found;
try {
found = subcoord.addResource(xares);
} catch (IllegalStateException e) {
throw new IllegalStateException("enlistResource: could not addResource " + xares);
}
// Transaction may have been set rollback only.
// Enlist is done, but RollbackException will be thrown anyway.
// Send the XA start to the XAResource
// A new Xid branch should be generated in case of new RM (if !found)
// See JTA Specifications, page 12/13.
int flag = found ? XAResource.TMJOIN : XAResource.TMNOFLAGS;
if ((delistedXARes != null) && delistedXARes.contains(xares)) {
flag = XAResource.TMRESUME;
}
Xid resXid = new XidImpl( getXid(),subcoord.getXaresIndex(xares) );
javax.transaction.xa.Xid javaxxid = new JavaXidImpl(resXid);
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("enlisted with resource= " + xares);
TraceTm.jta.debug("start javaxxid= " + javaxxid);
}
if (!found) {
subcoord.addJavaxXid(javaxxid);
}
try {
xares.start (javaxxid, flag);
} catch (XAException e) {
String error =
"Cannot send XA("
+xares
+ ") start:"
+ e
+ " (error code = "
+ e.errorCode
+ ") --"
+ e.getMessage();
TraceTm.jotm.error(error);
throw new SystemException(error);
}
if (!enlistedXARes.contains(xares)) {
/// add to enlisted list
enlistedXARes.add(xares);
enlistedJavaxXid.add(javaxxid);
}
int status = this.getStatus();
switch (status) {
case Status.STATUS_ACTIVE :
case Status.STATUS_PREPARING :
break;
case Status.STATUS_PREPARED :
throw new IllegalStateException("Transaction already prepared.");
case Status.STATUS_COMMITTING :
// throw new IllegalStateException("Transaction already started committing.");
break;
case Status.STATUS_COMMITTED :
throw new IllegalStateException("Transaction already committed.");
case Status.STATUS_MARKED_ROLLBACK :
throw new RollbackException("Transaction already marked for rollback");
case Status.STATUS_ROLLING_BACK :
throw new RollbackException("Transaction already started rolling back.");
case Status.STATUS_ROLLEDBACK :
throw new RollbackException("Transaction already rolled back.");
case Status.STATUS_NO_TRANSACTION :
throw new IllegalStateException("No current transaction.");
case Status.STATUS_UNKNOWN :
throw new IllegalStateException("Unknown transaction status");
default :
throw new IllegalStateException("Illegal transaction status: " + status);
}
return true;
}
/**
* delist all enlisted resources and move to suspended
*/
public void doDetach(int flag) throws SystemException {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("TransactionImpl.doDetach flag= " + XAResourceHelper.getFlagName(flag));
TraceTm.jta.debug("number of enlisted= " + enlistedXARes.size());
}
// always copy enlisted to suspended resource list
// since jonas may resume the transaction in beforecompletion
delistedXARes = new ArrayList(enlistedXARes);
for (XAResource xar : delistedXARes) {
delistResource(xar, flag);
}
}
/**
* enlist/clear all suspended resource
*/
public void doAttach(int flag) throws SystemException, RollbackException {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("TransactionImpl.doAttach flag= " + XAResourceHelper.getFlagName(flag));
TraceTm.jta.debug("number of enlisted= " + enlistedXARes.size());
}
boolean rollbackonenlist = false;
RollbackException mye = null;
// we attach suspended transactions
if (flag == XAResource.TMRESUME) {
// we may be calling resume from beforecompletion on transaction that are not suspended!
for (int i = 0;
(delistedXARes != null) && (i < delistedXARes.size());
i++) {
try {
enlistResource(delistedXARes.get(i));
} catch (RollbackException e) {
if (!rollbackonenlist) {
rollbackonenlist = true;
mye = e;
}
}
}
}
delistedXARes = null;
if (rollbackonenlist) {
throw new RollbackException (mye.getMessage());
}
}
/**
* get a copy of the list of currently enlisted resource
*/
public List getEnlistedXAResource() {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("getEnlistedXAResource size= " + enlistedXARes.size());
}
return new ArrayList(enlistedXARes);
}
/**
* Obtain the status of the transaction associated with the current thread.
*
* @return The transaction status. If no transaction is associated with
* the current thread, this method returns the Status.NoTransaction
* value.
*
* @exception SystemException Thrown if the transaction manager
* encounters an unexpected error condition
*
*/
public int getStatus() throws SystemException {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("TransactionImpl.getStatus()");
}
// *** Distributed transaction
Coordinator coord = myCtx.getCoordinator();
if (coord != null) {
// Ask the transaction status to JTM
int ret;
try {
propagateCtx = false;
ret = coord.get_status();
} catch (Exception e) {
TraceTm.jotm.error("cannot reach JTM:", e);
return Status.STATUS_NO_TRANSACTION;
} finally {
propagateCtx = true;
}
return ret;
}
// *** Local transaction
// The status is kept in the subcoordinator
if (subcoord != null) {
return subcoord.getStatus();
} else {
return localstatus;
}
}
/**
* Register a synchronization object for the transaction currently
* associated with the calling thread. The transction manager invokes
* the beforeCompletion method prior to starting the transaction
* commit process. After the transaction is completed, the transaction
* manager invokes the afterCompletion method.
*
* @param sync The javax.transaction.Synchronization object for the
* transaction associated with the target object
*
* @exception RollbackException Thrown to indicate that
* the transaction has been marked for rollback only.
*
* @exception IllegalStateException Thrown if the transaction in the
* target object is in prepared state or the transaction is inactive.
*
* @exception SystemException Thrown if the transaction manager
* encounters an unexpected error condition
*/
public void registerSynchronization(Synchronization sync)
throws RollbackException, IllegalStateException, SystemException {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("Synchro="+sync);
}
// It's time to make the subcoordinator, if not existing yet.
if (subcoord == null) {
makeSubCoord(false, true);
}
// Add Synchronization to the list.
// may raise exceptions
subcoord.addSynchronization(sync);
}
/**
* Rollback the transaction represented by this Transaction object.
*
* @exception IllegalStateException Thrown if the transaction in the
* target object is in prepared state or the transaction is inactive.
*
* @exception SystemException Thrown if the transaction manager
* encounters an unexpected error condition
*
*/
public void rollback() throws IllegalStateException, SystemException {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("TransactionImpl.rollback(tx= " + this +")");
}
// *** Distributed transaction.
Terminator term = myCtx.getTerminator();
if (term != null) {
// Rollback the Transaction
try {
propagateCtx = false;
term.rollback();
} catch (java.rmi.ServerException e) {
// HeuristicCommit ????
throw new IllegalStateException(
"Exception on rollback:" + e);
} catch (Exception e) {
Current.getCurrent().forgetTx(getXid());
localstatus = Status.STATUS_UNKNOWN;
clearUserResourceMap();
throw new SystemException("Unexpected Exception on rollback");
} finally {
propagateCtx = true;
}
if (subcoord == null) {
// if no coordinator, timer will not be unset by JTM.
unsetTimer();
}
// release this object.
Current.getCurrent().forgetTx(getXid());
localstatus = Status.STATUS_ROLLEDBACK;
clearUserResourceMap();
return;
}
// *** Local transaction.
// if no coordinator, nothing to do.
if (subcoord != null) {
try {
subcoord.rollback();
} catch (RemoteException e) {
Current.getCurrent().forgetTx(getXid());
localstatus = Status.STATUS_UNKNOWN;
clearUserResourceMap();
throw new IllegalStateException("Exception on rollback:" + e);
}
} else {
// if no coordinator, just unset the timer.
unsetTimer();
}
// release this object.
Current.getCurrent().forgetTx(getXid());
localstatus = Status.STATUS_ROLLEDBACK;
clearUserResourceMap();
}
/**
* Prepare the transaction represented by this Transaction object.
*
* @exception IllegalStateException Thrown if the transaction in the
* target object is in prepared state or the transaction is inactive.
*
* @exception SystemException Thrown if the transaction manager
* encounters an unexpected error condition
*
* @return prepare status
*/
public int prepare() throws IllegalStateException, SystemException {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("TransactionImpl.prepare(tx= " + this +")");
}
int ret = 0;
if (subcoord != null) {
try {
ret = subcoord.prepare();
} catch (RemoteException e) {
TraceTm.jotm.error("Unexpected Exception on prepare:", e);
throw new SystemException("Unexpected Exception on prepare");
}
}
return ret;
}
/**
* Modify the transaction associated with the current thread such that
* the only possible outcome of the transaction is to roll back the
* transaction.
*
* @exception IllegalStateException Thrown if the current thread is
* not associated with any transaction.
*
* @exception SystemException Thrown if the transaction manager
* encounters an unexpected error condition
*
*/
public void setRollbackOnly() throws IllegalStateException, SystemException {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("Tx=" + this);
}
Coordinator coord = myCtx.getCoordinator();
if (coord != null) {
// Distributed transaction
try {
propagateCtx = false;
coord.rollback_only();
} catch (RemoteException e) {
TraceTm.jotm.error("Cannot perform coordinator rollback only", e);
} finally {
propagateCtx = true;
}
}
// perform this even for distributed transactions:
// resolves bugs 300077, 300078
if (subcoord == null) {
// make a subCoordinator object if not existing yet
try {
makeSubCoord(false, false);
} catch (RollbackException e) {
TraceTm.jotm.debug("already rolled back");
return;
}
}
subcoord.setRollbackOnly();
}
// ------------------------------------------------------------------
// TimerEventListener implementation
// ------------------------------------------------------------------
/**
* timeout for that transaction has expired
*/
public void timeoutExpired(Object arg) {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("TransactionImpl.timeoutExpired");
}
// increment counter for management
Current.getCurrent().incrementExpiredCounter();
// make the subcoordinator object, if not existing yet.
if (subcoord == null) {
// if this is a proxy, just forget this object. The JTM will
// rollback transaction with its own timer.
Terminator term = myCtx.getTerminator();
if (term != null) {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("forget tx (tx=" + this +")");
}
Current.getCurrent().forgetTx(getXid());
localstatus = Status.STATUS_ROLLEDBACK;
return;
}
try {
makeSubCoord(false, false);
} catch (RollbackException e) {
TraceTm.jotm.debug("already rolled back");
localstatus = Status.STATUS_ROLLEDBACK;
return;
} catch (SystemException e) {
TraceTm.jotm.error("cannot make subcoordinator");
localstatus = Status.STATUS_ROLLEDBACK;
return;
}
}
// Try to set it "rollback only"
// avoids a rollback while SQL requests are in progress
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("set rollback only (tx=" + this +")");
}
try {
subcoord.setRollbackOnly();
} catch (Exception e) {
TraceTm.jotm.error("cannot rollbackonly:" + e);
}
}
// ------------------------------------------------------------------
// This object is used as an HashTable index
// ------------------------------------------------------------------
/**
* return true if objects are identical
*/
public boolean equals(Object obj2) {
if (obj2 instanceof TransactionImpl) {
TransactionImpl tx2 = (TransactionImpl) obj2;
// trivial case
if (tx2 == this) {
return true;
}
// compare otids
return getXid().equals(tx2.getXid());
} else {
return false;
}
}
/**
* return a hashcode value for this object
*/
@Override
public int hashCode() {
if (!genXidhashcode) {
genXidhashcode = true;
myXidhashcode = getXid().hashCode();
}
return myXidhashcode;
}
// ------------------------------------------------------------------
// Other methods
// ------------------------------------------------------------------
/**
* string form
*/
public String toString() {
if (!genXidtostring) {
genXidtostring = true;
myXidtostring = getXid().toString();
}
return myXidtostring;
}
/**
* Return associated PropagationContext
* Used for implicit Context propagation.
* @param hold true if must increment the count to hold the object (not used!)
* @return PropagationContext associated with the transaction.
*/
public synchronized TransactionContext getPropagationContext(boolean hold) {
if (propagateCtx) {
return myCtx;
} else {
return null;
}
}
/**
* set a timer for the transaction
* @param timer the timer event to set
*/
public void setTimer(TimerEvent timer) {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("set timer for tx (timer=" + timer + ", tx=" + this +")");
}
this.timer = timer;
}
/**
* unset the timer
*/
public void unsetTimer() {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("unset timer for tx (timer=" + timer + ", tx=" + this +")");
}
if (timer != null) {
timer.unset();
timer = null;
}
}
/**
* set the date time stamp for the transaction
* @param date the Date to set for the transaction
*/
public void setTxDate(Date date) {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("set date for tx (data=" + date + ", tx=" + this +")");
}
txDate = (Date) date.clone();
}
/**
* get the date time stamp for the transaction
* @return the timestamp
*/
public Date getTxDate() {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("get date for tx (date=" + txDate + ", tx=" + this +")");
}
return (Date) txDate.clone();
}
/**
* update the propagation context
* We should be inside the reply of a request involved in a tx here!
* @param pctx propagation context
*/
public synchronized void updatePropagationContext(TransactionContext pctx) {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("TransactionImpl.updatePropagationContext");
}
Coordinator remoteCoord = pctx.getCoordinator();
if (remoteCoord == null && myCtx.getCoordinator() != null) {
TraceTm.jotm.error("setPropagationContext: Bad Coordinator");
TraceTm.jotm.error("remoteCoord = " + remoteCoord);
TraceTm.jotm.error("myCtx.getCoordinator()= " + myCtx.getCoordinator());
return;
}
// Interpose subCoordinator if newly distributed Tx
if (remoteCoord != null && myCtx.getCoordinator() == null) {
myCtx.setCoordinator(pctx.getCoordinator());
if (subcoord != null) {
// register the subCoordinator as a Resource.
TraceTm.jta.debug("register the subCoordinator as a Resource");
try {
propagateCtx = false;
recoveryCoord = remoteCoord.register_resource(subcoord);
} catch (RemoteException e) {
TraceTm.jotm.warn("Cannot make interposition :" + e.getCause());
return;
} finally {
propagateCtx = true;
}
}
}
if ( pctx.getTerminator() != null ) {
myCtx.setTerminator(pctx.getTerminator());
}
}
/**
* Get the Xid of the transaction
* @return the Xid
*/
public Xid getXid() {
return myXid;
}
/**
* make a SubCoordinator for this Transaction object
* @param interpose Make interposition if not already done.
* @param active transaction still active.
*/
private void makeSubCoord(boolean interpose, boolean active) throws RollbackException, SystemException {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("make subcoordinator");
}
// Build the SubCoordinator object
try {
subcoord = new SubCoordinator(this, getXid());
} catch (RemoteException e) {
// should never go here.
TraceTm.jotm.error("new SubCoordinator raised exception: ", e);
return;
}
if (! active) {
// Just create the subCoordinator to store some state locally.
// Any attempt to register will fail if transaction is rolled back.
return;
}
// If interposition must be done: do it now!
// Each time we have a remoteCoord + a subCoord, we must interpose.
Coordinator remoteCoord = myCtx.getCoordinator();
// First of all, create the Control object on JTM
// if it was not created before, if interpose flag is set.
if (interpose && remoteCoord == null) {
try {
if (TraceTm.jta.isDebugEnabled()) {
TraceTm.jta.debug("Creating a remote Control on JTM for a distributed transaction");
}
propagateCtx = false;
//Control coord = Current.getJTM().create(myCtx.getTimeout());
//Control coord = Current.getJTM().create(myCtx.getTimeout(), getXid());
Control coord = Current.getJTM().recreate(myCtx);
remoteCoord =
(Coordinator) javax.rmi.PortableRemoteObject.narrow(coord, Coordinator.class);
} catch (RemoteException e) {
TraceTm.jotm.error("Cannot create distributed transaction:", e);
cleanup();
return;
} finally {
propagateCtx = true;
}
myCtx.setCoordinator(remoteCoord);
// fix for transaction context propagation with
// the Jeremie protocol
if (myCtx.getTerminator() == null) {
myCtx.setTerminator((Terminator) remoteCoord);
}
}
// Achieve interposition if not already done:
// - register the subCoordinator as a Resource.
if (remoteCoord != null && recoveryCoord == null) {
try {
propagateCtx = false;
recoveryCoord = remoteCoord.register_resource(subcoord);
} catch (RemoteException e) {
// If cannot be registered, destroy it.
// transaction status will be only local.
cleanup();
if (e.getCause() instanceof TransactionRolledbackException) {
TraceTm.jotm.warn("Cannot Make Interposition: rolled back occured");
throw new RollbackException("Cannot Make Interposition");
} else {
TraceTm.jotm.warn("Cannot make Interposition:" + e.getCause());
throw new SystemException("Cannot Make Interposition");
}
} finally {
propagateCtx = true;
}
}
// increment counter for management
Current.getCurrent().incrementBeginCounter();
}
public boolean toRemove() {
return toremove;
}
public void cleanup() {
if (subcoord != null) {
TraceTm.jta.debug("unexport SubCoordinator");
try {
PortableRemoteObject.unexportObject(subcoord);
} catch (NoSuchObjectException e) {
TraceTm.jta.debug("Cannot unexport subcoord:" + e);
}
subcoord = null;
}
}
/**
* clear userResourceMap
*/
private synchronized void clearUserResourceMap() {
if ((userResourceMap != null) && !(userResourceMap.isEmpty())) {
userResourceMap.clear();
userResourceMap = null;
}
}
}
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