/*
 * Copyright (c) 2000, 2017 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package com.sun.messaging.bridge.service.jms;

import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.ResourceBundle;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Topic;
import javax.jms.Destination;
import javax.jms.Session;
import javax.jms.XASession;
import javax.jms.Connection;
import javax.jms.XAConnection;
import javax.jms.XAConnectionFactory;
import javax.jms.JMSException;
import javax.jms.ExceptionListener;
import javax.jms.ConnectionMetaData;
import javax.transaction.Status;
import javax.transaction.Transaction;
import javax.transaction.TransactionManager;
import javax.transaction.RollbackException;
import javax.transaction.HeuristicMixedException;
import javax.transaction.HeuristicRollbackException;
import javax.transaction.xa.XAResource;
import com.sun.messaging.bridge.service.jms.xml.JMSBridgeXMLConstant;
import com.sun.messaging.bridge.service.jms.tx.TransactionManagerImpl;
import com.sun.messaging.bridge.api.MessageTransformer;
import com.sun.messaging.bridge.api.FaultInjection;
import com.sun.messaging.bridge.api.BridgeCmdSharedResources;
import com.sun.messaging.bridge.api.BridgeException;
import com.sun.messaging.bridge.service.jms.resources.JMSBridgeResources;
import com.sun.messaging.bridge.api.Bridge;

/**
 * A JMS Bridge Link
 *
 * @author amyk
 *
 */
public class Link implements Runnable {

    private static JMSBridgeResources _jbr = JMSBridge.getJMSBridgeResources();

    public enum LinkState {
        UNINITIALIZED {
            @Override
            public String toString(ResourceBundle rb) {
                return rb.getString(BridgeCmdSharedResources.I_STATE_UNINITIALIZED);
            }
        },
        STARTING {
            @Override
            public String toString(ResourceBundle rb) {
                return rb.getString(BridgeCmdSharedResources.I_STATE_STARTING);
            }
        },
        STARTED {
            @Override
            public String toString(ResourceBundle rb) {
                return rb.getString(BridgeCmdSharedResources.I_STATE_STARTED);
            }
        },
        STOPPING {
            @Override
            public String toString(ResourceBundle rb) {
                return rb.getString(BridgeCmdSharedResources.I_STATE_STOPPING);
            }
        },
        STOPPED {
            @Override
            public String toString(ResourceBundle rb) {
                return rb.getString(BridgeCmdSharedResources.I_STATE_STOPPED);
            }
        },
        PAUSING {
            @Override
            public String toString(ResourceBundle rb) {
                return rb.getString(BridgeCmdSharedResources.I_STATE_PAUSING);
            }
        },
        PAUSED {
            @Override
            public String toString(ResourceBundle rb) {
                return rb.getString(BridgeCmdSharedResources.I_STATE_PAUSED);
            }
        };

        public abstract String toString(ResourceBundle rb);

        @Override
        public String toString() {
            return toString(_jbr);
        }
    }

    private Logger _logger = null;

    private TransactionManager _tm = null;
    private Object _sourceCF = null;
    private Object _targetCF = null;

    private Object _sourceDest = null;
    private Object _targetDest = null;

    private MessageConsumer _consumer = null;
    private MessageProducer _producer = null;
    private Session _sourceSession = null;
    private Session _targetSession = null;
    private Connection _sourceConn = null;
    private Connection _targetConn = null;

    private String _name = null;
    private Properties _linkAttrs = null;
    private Properties _srcAttrs = null;
    private Properties _tgtAttrs = null;
    private Properties _tgtProps = null;
    private JMSBridge _parent = null;

    private Properties _msgTransformerProps = null;

    private LinkState _state = LinkState.UNINITIALIZED;
    private Thread _thread = null;

    private boolean _targetStayConnected = false;
    private boolean _sourceConnException = false;
    private boolean _targetConnException = false;
    private String _sourceProviderName = null;
    private String _targetProviderName = null;
    private String _sourceDestName = null;
    private String _targetDestName = null;
    private EventNotifier _notifier = null;
    private static final int MIN_TRANSACTION_TIMEOUT = 60; // seconds
    private boolean _enabled = true;
    private boolean _isTransacted = true;
    private MessageTransformer<Message, Message> _msgTransformer = null;
    private boolean _consumeOnTransformError = false;
    private boolean _retainReplyTo = false;
    private FaultInjection _fi = FaultInjection.getInjection();

    private String _targetConnType = null;
    private String _sourceConnType = null;

    private MessageProducer _branchProducer = null;
    private String _targetCurrentDestinationName = null;
    private boolean _unidentifiedProducer = false;

    private boolean _firstTransformerBranchTo = true;
    private boolean _firstTransformerNoTransfer = true;
    private boolean _firstTransformerAsSourceChange = true;
    private int _sourceAttemptInterval = 5; // sec
    private int _targetAttemptInterval = 5; // sec

    public synchronized void init(Properties linkAttrs, Properties srcAttrs, Properties tgtAttrs, Properties tgtProps, JMSBridge parent) throws Exception {
        _linkAttrs = linkAttrs;
        _srcAttrs = srcAttrs;
        _tgtAttrs = tgtAttrs;
        _tgtProps = tgtProps;
        _parent = parent;
        _notifier = parent._notifier;

        _msgTransformerProps = (_tgtProps == null ? (new Properties()) : (new Properties(_tgtProps)));
        _msgTransformerProps.setProperty(JMSBridge.BRIDGE_NAME_PROPERTY, _parent.getBridgeName());

        if (_sourceDest == null || _targetDest == null || _sourceCF == null || _targetCF == null) {
            throw new IllegalStateException(_jbr.getKString(_jbr.X_SOURCE_TARGET_NO_INFO,
                    (_sourceCF == null ? _jbr.getString(_jbr.M_SOURCE_1) : _jbr.getString(_jbr.M_TARGET_1)), _name));
        }
        if (_logger == null) {
            throw new IllegalStateException("No logger set for " + this);
        }
        _enabled = Boolean.valueOf(_linkAttrs.getProperty(JMSBridgeXMLConstant.Link.ENABLED, JMSBridgeXMLConstant.Link.ENABLED_DEFAULT)).booleanValue();

        _isTransacted = Boolean.valueOf(_linkAttrs.getProperty(JMSBridgeXMLConstant.Link.TRANSACTED, JMSBridgeXMLConstant.Link.TRANSACTED_DEFAULT))
                .booleanValue();

        if (_isTransacted && !(_sourceCF instanceof XAConnectionFactory)) {
            String[] eparam = { "XAConnectionFactory", _jbr.getString(_jbr.M_TRANSACTED), this.toString() };
            throw new IllegalArgumentException(_jbr.getKString(_jbr.X_REQUIRED_FOR_LINK, eparam));
        }
        if (!_isTransacted && (_sourceCF instanceof XAConnectionFactory)) {
            String[] eparam = { "ConnectionFactory", _jbr.getString(_jbr.M_NONTRANSACTED), this.toString() };
            throw new IllegalArgumentException(_jbr.getKString(_jbr.X_REQUIRED_FOR_LINK, eparam));
        }

        String cn = _tgtAttrs.getProperty(JMSBridgeXMLConstant.Target.MTFCLASS);
        if (cn != null) {
            _msgTransformer = (MessageTransformer<Message, Message>) Class.forName(cn).newInstance();
        }
        _consumeOnTransformError = Boolean
                .valueOf(
                        _tgtAttrs.getProperty(JMSBridgeXMLConstant.Target.CONSUMEONTRANSFORMERROR, JMSBridgeXMLConstant.Target.CONSUMEONTRANSFORMERROR_DEFAULT))
                .booleanValue();

        _retainReplyTo = Boolean.valueOf(_tgtAttrs.getProperty(JMSBridgeXMLConstant.Target.RETAINREPLYTO, JMSBridgeXMLConstant.Target.RETAINREPLYTO_DEFAULT))
                .booleanValue();

        String val = _parent.getCFAttributes(_sourceCF).getProperty(JMSBridgeXMLConstant.CF.CONNECTATTEMPTINTERVAL,
                JMSBridgeXMLConstant.CF.CONNECTATTEMPTINTERVAL_DEFAULT);
        if (val != null) {
            _sourceAttemptInterval = Integer.parseInt(val);
        }

        val = _parent.getCFAttributes(_targetCF).getProperty(JMSBridgeXMLConstant.CF.CONNECTATTEMPTINTERVAL,
                JMSBridgeXMLConstant.CF.CONNECTATTEMPTINTERVAL_DEFAULT);
        if (val != null) {
            _targetAttemptInterval = Integer.parseInt(val);
        }

        if (_sourceCF instanceof XAConnectionFactory) {

            _tm = _parent.getTransactionManager();
            if (_tm == null) {
                throw new IllegalStateException("No transaction manager for XA in " + this);
            }
            if (_parent.supportTransactionTimeout()) {
                if (_parent.getTransactionTimeout() < MIN_TRANSACTION_TIMEOUT) {
                    throw new IllegalArgumentException("Transaction timeout " + _parent.getTransactionTimeout() + " is too small");
                }
                _logger.log(Level.INFO,
                        "Link " + this + " uses TM " + _tm.getClass().toString() + ", transaction timeout " + _parent.getTransactionTimeout() + " seconds");
            } else {
                _logger.log(Level.INFO, _jbr.getString(_jbr.I_LINK_USE_TM, this.toString(), _tm.getClass().toString()));
            }
        }

        String[] param = { this.toString(), (_linkAttrs == null ? "null" : _linkAttrs.toString()), (_srcAttrs == null ? "null" : _srcAttrs.toString()),
                (_tgtAttrs == null ? "null" : _tgtAttrs.toString()), (_tgtProps == null ? "null" : _tgtProps.toString()) };
        _logger.log(Level.INFO, _jbr.getString(_jbr.I_INITED_LINK_WITH, param));

        _state = LinkState.STOPPED;
    }

    /**
     * To be called before start() and after init() only needed for certain external TM like Atomikos
     */
    public void registerXAResources() throws Exception {

        if (!(_sourceCF instanceof XAConnectionFactory)) {
            return;
        }

        XAResourceHandle srh = new XAResourceHandle(false);
        XAResourceHandle trh = new XAResourceHandle(true);
        Transaction tx = null;
        try {
            _logger.log(Level.INFO, _jbr.getString(_jbr.I_REGISTER_RMS_FOR, this.toString()));
            initSource(false, false, false);
            initTarget(false, false, false);
            srh.xar = ((XASession) _sourceSession).getXAResource();
            if (((Refable) _targetCF).isEmbeded() && ((Refable) _sourceCF).isEmbeded()) {
                trh.xar = srh.xar;
            } else {
                trh.xar = ((XASession) _targetSession).getXAResource();
                if (trh.xar.getClass().getName().equals(srh.xar.getClass().getName())) {
                    trh.xar = new XAResourceImpl(trh.xar);
                    _logger.log(Level.INFO, _jbr.getString(_jbr.I_USE_XARESOURCE_WRAP_TARGET, trh.xar.getClass().getName()));
                }
            }
            _tm.begin();
            tx = _tm.getTransaction();
            if (!doEnlistAndRollbackOnError(tx, _tm, srh)) {
                throw srh.ex;
            }
            if (srh.xar != trh.xar) {
                if (!doEnlistAndRollbackOnError(_tm.getTransaction(), _tm, trh)) {
                    throw trh.ex;
                }
            }

        } finally {
            doFinally(tx, _tm, srh, trh);
            closeSource();
            closeTarget();
        }
        _logger.log(Level.INFO, _jbr.getString(_jbr.I_REGISTERED_RMS_FOR, this.toString()));
    }

    public boolean isEnabled() {
        if (_state == LinkState.UNINITIALIZED) {
            throw new IllegalStateException("Link is not initialized");
        }
        return _enabled;
    }

    public boolean isTransacted() {
        if (_state == LinkState.UNINITIALIZED) {
            throw new IllegalStateException("Link is not initialized");
        }
        return _isTransacted;
    }

    public void enable() throws Exception {
        if (isEnabled()) {
            _logger.log(Level.INFO, this + " is already enabled");
            return;
        }
        _enabled = true; // XXX todo
    }

    public synchronized void start(boolean doReconnect) throws Exception {

        if (_state == LinkState.UNINITIALIZED) {
            throw new IllegalStateException("Link not initialized !");
        }
        if (_state == LinkState.STARTED) {
            _logger.log(Level.INFO, _jbr.getString(_jbr.I_ALREADY_STARTED, this.toString()));
            return;
        }
        _state = LinkState.STARTING;

        try {
            initSource(true, doReconnect, true);
            initTarget(true, doReconnect, true);

            _thread = new Thread(this);
            _thread.setDaemon(true);
            _thread.setName(toString());
            _thread.start();

        } catch (Throwable t) {
            _logger.log(Level.SEVERE, _jbr.getKString(_jbr.E_UNABLE_START, this.toString(), t.getMessage()), t);
            try {
                stop(!doReconnect);
            } catch (Throwable t1) {
                _logger.log(Level.WARNING, _jbr.getKString(_jbr.E_UNABLE_STOP_AFTER_START_FAILURE, this.toString()), t1);
            }
            throw new Exception(t);
        }
    }

    public synchronized void postStart() throws Exception {
        if (_state == LinkState.STARTED) {
            return;
        }
        if (_state != LinkState.STARTING) {
            throw new IllegalStateException(_jbr.getKString(_jbr.X_HAS_STATE, this.toString(), _state.toString()));
        }
        try {
            resume(false);
            _state = LinkState.STARTED;
        } catch (Exception e) {
            try {
                stop();
            } catch (Throwable t) {
                _logger.log(Level.WARNING, _jbr.getKString(_jbr.E_UNABLE_STOP_AFTER_POSTSTART_FAILURE, this.toString()), t);
            }
            throw e;
        }
    }

    /**
     */
    public synchronized void pause() throws Exception {
        if (_sourceConn == null) {
            throw new IllegalStateException("Source connection not created");
        }
        if (_state == LinkState.UNINITIALIZED || _state == LinkState.STOPPED || _state == LinkState.STOPPING) {
            throw new IllegalStateException(_jbr.getKString(_jbr.X_PAUSE_NOT_ALLOWED_IN_STATE, this.toString(), _state.toString()));
        }
        if (_state == LinkState.PAUSED || _state == LinkState.PAUSING) {
            _logger.log(Level.INFO, _jbr.getString(_jbr.I_ALREADY_PAUSED, this.toString()));
            return;
        }
        _state = LinkState.PAUSING;
        try {
            _sourceConn.stop();
        } catch (Exception e) {
            _logger.log(Level.SEVERE, _jbr.getKString(_jbr.E_UNABLE_PAUSE_SOURCE_CONN, this.toString()), e);
            try {
                stop();
            } catch (Exception e1) {
                _logger.log(Level.SEVERE, _jbr.getString(_jbr.E_UNABLE_STOP_AFTER_PAUSE_FAILURE, this.toString()), e);
            }
            throw e;
        }
        _state = LinkState.PAUSED;
    }

    /**
     * to be called immediately after start()
     */
    public synchronized void resume(boolean resume) throws Exception {
        if (_sourceConn == null) {
            throw new IllegalStateException("Source connection not created");
        }
        if (_state == LinkState.UNINITIALIZED || _state == LinkState.STOPPED || _state == LinkState.STOPPING) {
            String[] eparam = { (resume ? _jbr.getString(_jbr.M_RESUMING_LINK) : _jbr.getString(_jbr.M_STARTING_SOURCE_CONN)), this.toString(),
                    _state.toString() };
            throw new IllegalStateException(_jbr.getKString(_jbr.X_NOT_ALLOWED_IN_STATE, eparam));
        }
        if (resume) {
            if (_state == LinkState.STARTING || _state == LinkState.STARTED) {
                _logger.log(Level.INFO, _jbr.getString(_jbr.I_ALREADY_RUNNING, this.toString()));
                return;
            }
        } else if (_state == LinkState.PAUSING || _state == LinkState.PAUSED) {
            _logger.log(Level.INFO, _jbr.getString(_jbr.I_IGNORE_START_SOURCE_REQUEST, this.toString(), _state.toString()));
            return;
        }

        try {
            _sourceConn.start();
        } catch (Exception e) {
            if (resume) {
                _logger.log(Level.SEVERE, _jbr.getKString(_jbr.E_UNABLE_RESUME_SOURCE_CONN, this.toString()), e);
            } else {
                _logger.log(Level.SEVERE, _jbr.getKString(_jbr.E_UNABLE_START_SOURCE_CONN, this.toString()), e);
            }
            try {
                stop();
            } catch (Exception e1) {
                _logger.log(Level.SEVERE, _jbr.getKString(_jbr.E_UNABLE_STOP_LINK_AFTER, this.toString(),
                        (resume ? _jbr.getString(_jbr.M_RESUME) : _jbr.getString(_jbr.M_START))), e);
            }
            throw e;
        }
        _state = LinkState.STARTED;
    }

    public void stop() throws Exception {
        stop(false);
    }

    public void stop(boolean waitExit) throws Exception {

        _notifier.notifyEvent(EventListener.EventType.LINK_STOP, this);

        Thread thr = null;
        Throwable t = null;

        synchronized (this) {

            _state = LinkState.STOPPING;

            thr = _thread;

            _logger.log(Level.INFO, _jbr.getString(_jbr.I_STOPPING_LINK, this.toString()));

            if (_thread != null && Thread.currentThread() != _thread) {
                _thread.interrupt();
            }

            try {
                if (_sourceConn != null) {
                    _sourceConn.close();
                }
            } catch (Throwable t0) {
                t = t0;
            }
            try {
                closeTarget();
            } catch (Throwable t1) {
                if (t == null) {
                    t = t1;
                }
            }

            if (t == null) {
                _state = LinkState.STOPPED;
                notifyAll();
                _thread = null;
            }

        }
        if (thr != null && Thread.currentThread() != thr) {
            thr.interrupt();
            if (!waitExit) {
                thr.join(30000);
            } else {
                while (true) {
                    try {
                        thr.join(60000);
                        _logger.log(Level.INFO, _jbr.I_WAITING_LINK_THREAD_EXIT, this.toString());
                    } catch (InterruptedException e) {
                    }
                }
            }
        }
        if (t != null) {
            throw new Exception(t);
        }
    }

    private void initSource() throws Exception {
        initSource(false, true, true);
    }

    private synchronized void initSource(boolean start, boolean doReconnect, boolean checkState) throws Exception {
        if (checkState) {
            if (_state == LinkState.STOPPING || _state == LinkState.STOPPED) {
                throw new JMSException(_jbr.getKString(_jbr.X_LINK_IS_STOPPED, this.toString()));
            }
        }

        _sourceConnException = false;

        String val = _srcAttrs.getProperty(JMSBridgeXMLConstant.Source.CLIENTID);
        _sourceConnType = "D";
        _logger.log(Level.INFO, _jbr.getString(_jbr.I_CREATE_DEDICATED_SOURCE_CONN, (val == null ? "" : "[ClientID=" + val + "]"), this.toString()));

        EventListener l = new EventListener(this);
        try {
            _notifier.addEventListener(EventListener.EventType.LINK_STOP, l);
            _notifier.addEventListener(EventListener.EventType.BRIDGE_STOP, l);
            _sourceConn = JMSBridge.openConnection(_sourceCF, _parent.getCFAttributes(_sourceCF), _jbr.getString(_jbr.M_SOURCE), this, l, _logger, doReconnect);
        } finally {
            _notifier.removeEventListener(l);
        }
        if (val != null) {
            try {
                _sourceConn.setClientID(val);
            } catch (JMSException e) {
                _logger.log(Level.WARNING, "Set client id " + val + " to source connection failed in " + this + ", try again ...", e);
                if (Thread.currentThread().isInterrupted()) {
                    throw e;
                }
                Thread.sleep(_sourceAttemptInterval);
                _sourceConn.setClientID(val);
            }
        }

        _sourceConn.stop();

        _sourceConn.setExceptionListener(new ExceptionListener() {

            @Override
            public void onException(JMSException exception) {
                _logger.log(Level.WARNING, _jbr.getKString(_jbr.W_CONN_EXCEPTION_OCCURRED, _jbr.getString(_jbr.M_SOURCE_1), this.toString()), exception);
                if (_targetConn instanceof PooledConnection) {
                    ((PooledConnection) _targetConn).invalid();
                } else if (_targetConn instanceof SharedConnection) {
                    ((SharedConnection) _targetConn).invalid();
                }
                _sourceConnException = true;
            }
        });

        try {
            ConnectionMetaData md = _sourceConn.getMetaData();
            _sourceProviderName = md.getJMSProviderName();
        } catch (Exception e) {
            _sourceProviderName = null;
            _logger.log(Level.WARNING, "Unable to get source JMSProvider from conn " + _sourceConn + " in " + this + ": " + e.getMessage());
        }

        if (_sourceConn instanceof XAConnection) {
            _sourceSession = ((XAConnection) _sourceConn).createXASession();
            XAResource xar = ((XASession) _sourceSession).getXAResource();
            String rm = ((Refable) _sourceCF).getRef();
            try {
                _logger.log(Level.INFO, _jbr.getString(_jbr.I_REGISTER_RM, rm, xar.toString()));
                _parent.getTransactionManagerAdapter().registerRM(rm, xar);
            } catch (Exception e) {
                String[] eparam = { xar.toString(), rm, this.toString() };
                _logger.log(Level.WARNING, _jbr.getKString(_jbr.W_REGISTER_SOURCE_XARESOURCE_FAILED, eparam), e);
                throw e;
            }
        } else {
            _sourceSession = _sourceConn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
        }
        String selector = _srcAttrs.getProperty(JMSBridgeXMLConstant.Source.SELECTOR);

        Object dest = _sourceDest;
        if (_sourceDest instanceof AutoDestination) {
            AutoDestination ad = (AutoDestination) _sourceDest;
            if (ad.isQueue()) {
                dest = _sourceSession.createQueue(ad.getName());
            } else {
                dest = _sourceSession.createTopic(ad.getName());
            }
        }
        if (dest instanceof Topic) {
            String duraname = _srcAttrs.getProperty(JMSBridgeXMLConstant.Source.DURABLESUB);
            if (duraname != null) {
                _consumer = _sourceSession.createDurableSubscriber((Topic) dest, duraname, selector, true);
            } else {
                _consumer = _sourceSession.createConsumer((Topic) dest, selector, true);
            }
        } else if (dest instanceof Queue) {
            _consumer = _sourceSession.createConsumer((Queue) dest, selector);
        } else {
            throw new IllegalArgumentException("Unknown source destination type: " + dest.getClass().getName() + " in " + this);
        }
    }

    private void initTarget() throws Exception {
        initTarget(false, true, true);
    }

    private synchronized void initTarget(boolean start, boolean doReconnect, boolean checkState) throws Exception {
        if (checkState) {
            if (_state == LinkState.STOPPING || _state == LinkState.STOPPED) {
                throw new JMSException("Link " + this + " is stopped");
            }
        }
        _targetConnException = false;

        String val = _tgtAttrs.getProperty(JMSBridgeXMLConstant.Target.STAYCONNECTED, JMSBridgeXMLConstant.Target.STAYCONNECTED_DEFAULT);
        _targetStayConnected = Boolean.valueOf(val).booleanValue();

        val = _tgtAttrs.getProperty(JMSBridgeXMLConstant.Target.CLIENTID);
        if (val != null || _targetStayConnected) {

            _targetConnType = "D";
            _logger.log(Level.INFO, _jbr.getString(_jbr.I_CREATE_DEDICATED_TARGET_CONN, (val == null ? "" : "[ClientID=" + val + "]"), this.toString()));

            EventListener l = new EventListener(this);
            try {
                _notifier.addEventListener(EventListener.EventType.LINK_STOP, l);
                _notifier.addEventListener(EventListener.EventType.BRIDGE_STOP, l);
                _targetConn = JMSBridge.openConnection(_targetCF, _parent.getCFAttributes(_targetCF), _jbr.getString(_jbr.M_TARGET), this, l, _logger,
                        doReconnect);
            } finally {
                _notifier.removeEventListener(l);
            }
            if (val != null) {
                try {
                    _targetConn.setClientID(val);
                } catch (JMSException e) {
                    _logger.log(Level.WARNING, "Set client id " + val + " to target connection failed in " + this + ", try again ...", e);
                    if (Thread.currentThread().isInterrupted()) {
                        throw e;
                    }
                    Thread.sleep(_targetAttemptInterval);
                    _targetConn.setClientID(val);
                }
            }

        } else if (!start) {
            _logger.log(Level.INFO, _jbr.getString(_jbr.I_GET_TARGET_CONN, this.toString()));
            _targetConn = _parent.obtainConnection(_targetCF, _jbr.getString(_jbr.M_TARGET), this, start);
        } else {
            _logger.log(Level.INFO, _jbr.getString(_jbr.I_DEFER_GET_TARGET_CONN, this.toString()));
            return;
        }
        if (_targetConn instanceof PooledConnection) {
            _targetConnType = "P";
        } else if (_targetConn instanceof SharedConnection) {
            _targetConnType = "S";
        }

        _targetConn.setExceptionListener(new ExceptionListener() {

            @Override
            public void onException(JMSException exception) {
                _logger.log(Level.WARNING, _jbr.getKString(_jbr.W_CONN_EXCEPTION_OCCURRED, _jbr.getString(_jbr.M_TARGET_1), this.toString()), exception);
                if (_targetConn instanceof PooledConnection) {
                    ((PooledConnection) _targetConn).invalid();
                } else if (_targetConn instanceof SharedConnection) {
                    ((SharedConnection) _targetConn).invalid();
                }
                _targetConnException = true;
            }
        });

        try {
            ConnectionMetaData md = _targetConn.getMetaData();
            _targetProviderName = md.getJMSProviderName();
        } catch (Exception e) {
            _targetProviderName = null;
            _logger.log(Level.WARNING, "Unable to get target JMSProvider from conn " + _targetConn + " in " + this + ": " + e.getMessage());
        }

        if (_targetConn instanceof XAConnection) {
            _targetSession = ((XAConnection) _targetConn).createXASession();
            XAResource xar = ((XASession) _targetSession).getXAResource();
            String rm = ((Refable) _targetCF).getRef();
            try {
                _logger.log(Level.INFO, _jbr.getString(_jbr.I_REGISTER_RM, rm, xar.toString()));
                _parent.getTransactionManagerAdapter().registerRM(rm, xar);
            } catch (Exception e) {
                String[] eparam = { xar.toString(), rm, this.toString() };
                _logger.log(Level.WARNING, _jbr.getKString(_jbr.W_REGISTER_TARGET_XARESOURCE_FAILED, eparam), e);
                throw e;
            }
        } else {
            _targetSession = _targetConn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
        }
        if (_targetDest instanceof Destination) {
            _producer = _targetSession.createProducer((Destination) _targetDest);
        } else if (_targetDest instanceof AutoDestination) {
            AutoDestination ad = (AutoDestination) _targetDest;
            if (ad.isQueue()) {
                _producer = _targetSession.createProducer(_targetSession.createQueue(ad.getName()));
            } else {
                _producer = _targetSession.createProducer(_targetSession.createTopic(ad.getName()));
            }
        } else if (_targetDest.equals(JMSBridgeXMLConstant.Target.DESTINATIONREF_AS_SOURCE)) {
            _unidentifiedProducer = true;
            _producer = null;
        } else {
            throw new IllegalArgumentException("Unknown target destination type: " + _targetDest.getClass().getName() + " in " + this);
        }
        if (_producer != null && _producer instanceof com.sun.messaging.jmq.jmsclient.MessageProducerImpl) {
            ((com.sun.messaging.jmq.jmsclient.MessageProducerImpl) _producer)._setForJMSBridge();
        }
    }

    private MessageProducer createProducer(Object d, String mid, boolean targetd) throws Exception {
        MessageProducer p = null;

        Object dest = d;

        if (d instanceof String) {
            dest = _parent.createDestination((String) d);
        }
        if (dest instanceof Destination) {
            Destination td = null;
            if (targetd) {
                td = (Destination) dest;
            } else {
                if (dest instanceof Queue) {
                    td = _targetSession.createQueue(((Queue) dest).getQueueName());
                } else if (dest instanceof Topic) {
                    td = _targetSession.createTopic(((Topic) dest).getTopicName());
                } else {
                    throw new JMSException("Unsupported JMS Destination type: " + d);
                }
            }
            p = _targetSession.createProducer(td);

        } else if (dest instanceof AutoDestination) {
            AutoDestination ad = (AutoDestination) dest;
            if (ad.isQueue()) {
                p = _targetSession.createProducer(_targetSession.createQueue(ad.getName()));
            } else {
                p = _targetSession.createProducer(_targetSession.createTopic(ad.getName()));
            }
        } else {
            throw new IllegalArgumentException(
                    "Unsupported destination type: " + dest.getClass().getName() + " to create target producer for message " + mid + " in " + this);
        }

        if (p != null && p instanceof com.sun.messaging.jmq.jmsclient.MessageProducerImpl) {
            ((com.sun.messaging.jmq.jmsclient.MessageProducerImpl) p)._setForJMSBridge();
        }

        return p;
    }

    private synchronized void closeTarget() {
        _targetConnException = false;

        if (_targetConn != null) {
            if (_targetConn instanceof SharedConnection || _targetConn instanceof PooledConnection) {
                try {
                    _targetSession.close();
                } catch (Throwable t) {
                    _logger.log(Level.WARNING, "Unable to close target Session in " + this, t);
                } finally {
                    try {

                        _parent.returnConnection(_targetConn, _targetCF);

                    } catch (Throwable t) {
                        _logger.log(Level.WARNING, "Unable to return target connection " + _targetConn + " in " + this, t);
                    }
                }
            } else {
                try {
                    _logger.log(Level.INFO, _jbr.getString(_jbr.I_CLOSE_TARGET_CONNECTION,
                            _targetConn.getClass().getName() + '@' + Integer.toHexString(_targetConn.hashCode()), this.toString()));
                    _targetConn.close();
                } catch (Throwable t) {
                    _logger.log(Level.WARNING, "Unable to close target connection " + _targetConn + " in " + this, t);
                }
            }
            _targetConn = null;
        }
    }

    private synchronized void closeSource() {
        _sourceConnException = false;

        if (_sourceConn != null) {
            if (_sourceConn instanceof SharedConnection || _sourceConn instanceof PooledConnection) {
                try {
                    _sourceSession.close();
                } catch (Throwable t) {
                    _logger.log(Level.WARNING, "Unable to close source Session in " + this, t);
                } finally {
                    try {

                        _parent.returnConnection(_sourceConn, _sourceCF);

                    } catch (Throwable t) {
                        logWarning("Unable to return source connection " + _sourceConn + " in " + this, t);
                    }
                }
            } else {
                try {
                    _logger.log(Level.INFO, _jbr.getString(_jbr.I_CLOSE_SOURCE_CONNECTION,
                            _sourceConn.getClass().getName() + '@' + Integer.toHexString(_sourceConn.hashCode()), this.toString()));
                    _sourceConn.close();
                } catch (Throwable t) {
                    logWarning("Unable to close source connection " + _sourceConn + " in " + this, t);
                }
            }
            _sourceConn = null;
        }
    }

    @Override
    public String toString() {
        StringBuffer sb = new StringBuffer();
        sb.append("link(" + getName() + ")[");
        sb.append(getSourceString());
        sb.append("-->");
        sb.append(getTargetString());
        sb.append("]");
        return sb.toString();
    }

    public String getSourceString() {
        if (_state == LinkState.UNINITIALIZED) {
            return "";
        }
        return (((Refable) _sourceCF).getRef() + ":" + (_sourceConnType == null ? "" : _sourceConnType) + ":" + getSourceDestinationName());
    }

    public String getTargetString() {
        if (_state == LinkState.UNINITIALIZED) {
            return "";
        }
        return (((Refable) _targetCF).getRef() + ":" + (_targetConnType == null ? "" : _targetConnType) + ":" + getTargetDestinationName());
    }

    public String getName() {
        return _name;
    }

    public void setName(String name) {
        _name = name;
    }

    public String getSourceProviderName() {
        String pn = _sourceProviderName;
        if (pn != null) {
            return pn;
        }

        return ((Refable) _sourceCF).getRefed().getClass().getName();
    }

    public String getTargetProviderName() {
        String pn = _targetProviderName;
        if (pn != null) {
            return pn;
        }

        return ((Refable) _targetCF).getRefed().getClass().getName();
    }

    public String getSourceDestinationName() {
        if (_sourceDestName != null) {
            return _sourceDestName;
        }

        Object dest = _sourceDest;
        try {

            if (dest instanceof Queue) {
                return (_sourceDestName = "queue:" + ((Queue) (dest)).getQueueName());
            } else if (dest instanceof Topic) {
                return (_sourceDestName = "topic:" + ((Topic) (dest)).getTopicName());
            } else {
                return (_sourceDestName = dest.toString());
            }

        } catch (Throwable t) {
            _logger.log(Level.WARNING, "Unable to get source destination name in " + this, t);
            return (_sourceDestName = dest.toString());
        }
    }

    public String getTargetDestinationName() {
        if (_targetDestName == null) {
            _targetDestName = toDestinationName(_targetDest);
        }
        return _targetDestName;
    }

    private String toDestinationName(Object d) {
        Object dest = d;
        try {

            if (dest instanceof Queue) {
                return ("queue:" + ((Queue) (dest)).getQueueName());
            } else if (d instanceof Topic) {
                return ("topic:" + ((Topic) (dest)).getTopicName());
            } else {
                return (dest.toString());
            }

        } catch (Throwable t) {
            _logger.log(Level.WARNING, "Unable to get destination from object " + d + " in " + this, t);
            return (dest.toString());
        }
    }

    public String getTargetCurrentDestinationName() {
        if (_targetCurrentDestinationName == null) {
            return getTargetDestinationName();
        }
        return _targetCurrentDestinationName;
    }

    public void setSourceConnectionFactory(Object cf) {
        _sourceCF = cf;
    }

    public void setTargetConnectionFactory(Object cf) {
        _targetCF = cf;
    }

    public void setSourceDestination(Object dest) {
        _sourceDest = dest;
    }

    public void setTargetDestination(Object dest) {
        _targetDest = dest;
    }

    public Object getSourceDestination() {
        return _sourceDest;
    }

    public Object getTargetDestination() {
        return _targetDest;
    }

    public void setLogger(Logger l) {
        _logger = l;
    }

    private final Object _listenerLock = new Object();

    @Override
    public void run() {
        try {

            if (_sourceConn instanceof XAConnection) {
                _logger.log(Level.INFO, _jbr.getString(_jbr.I_RUNNING_XA_CONSUMER, this.toString()));
                runTransacted();
            } else {
                _logger.log(Level.INFO, _jbr.getString(_jbr.I_RUNNING_NONTXN_CONSUMER, this.toString()));
                runNonTransacted();
            }

        } catch (Throwable t) {
            Level l = Level.WARNING;
            if (_state != LinkState.STOPPING && _state != LinkState.STOPPED) {
                l = Level.SEVERE;
            }
            if (t instanceof InterruptedException) {
                _logger.log(l, "Link thread is interrupted in " + this);
            } else {
                _logger.log(l, "Runtime exception in " + this, t);
            }

        } finally {
            closeSource();
            closeTarget();
        }
        if (_state != LinkState.STOPPING && _state != LinkState.STOPPED) {
            try {
                stop();
            } catch (Throwable t) {
                _logger.log(Level.WARNING, "Exception in stopping link " + this + ": " + t.getMessage());
            }
        }

        _logger.log(Level.INFO, _jbr.getString(_jbr.I_LINK_THREAD_EXIT, this.toString()));
    }

    static class XAResourceHandle {

        XAResource xar = null;
        boolean enlisted = false;
        boolean delisted = true;
        boolean istarget = false;
        RuntimeException ex = null;

        public XAResourceHandle(boolean target) {
            istarget = target;
        }

        @Override
        public String toString() {
            return "[" + (istarget ? _jbr.getString(_jbr.M_TARGET) : _jbr.getString(_jbr.M_SOURCE)) + "]" + xar;
        }
    }

    private static final int MAX_CONSECUTIVE_THROWABLES = 5;

    private void runTransacted() throws Throwable {
        long msgCount = 0;

        long receiveTimeout = 0L;
        if (_parent.supportTransactionTimeout()) {
            receiveTimeout = (((long) _parent.getTransactionTimeout()) / (long) 2) * 1000;
        }

        int consecutiveThrowables = 0;

        while (_state != LinkState.STOPPING && _state != LinkState.STOPPED) {

            if (Thread.currentThread().isInterrupted()) {
                throw new InterruptedException(_jbr.getKString(_jbr.X_LINK_INTERRUPTED, this.toString()));
            }

            Transaction transaction = null;
            XAResourceHandle srh = new XAResourceHandle(false);
            XAResourceHandle trh = new XAResourceHandle(true);
            Message m = null;
            MessageHeaders srcmhs = null;
            String mid = null;
            Throwable currentThrowable = null;
            _branchProducer = null;
            _targetCurrentDestinationName = null;
            try {

                if (_sourceConnException) {
                    closeSource();
                    initSource();
                    resume(false);
                }

                if (_targetConnException) {
                    closeTarget();
                    if (_targetStayConnected) {
                        initTarget();
                    }
                }

                srh.xar = ((XASession) _sourceSession).getXAResource();

                if (_logger.isLoggable(Level.FINE)) {
                    _logger.log(Level.FINE, "BEGIN transaction in " + this);
                }
                try {
                    _tm.begin();
                } catch (Exception e) {
                    currentThrowable = e;
                    _logger.log(Level.SEVERE, "Unable to start transaction in" + this, e);
                    _sourceConnException = true;
                    _targetConnException = true;
                    continue;
                }

                try {
                    transaction = _tm.getTransaction();
                } catch (Exception e) {
                    currentThrowable = e;
                    _logger.log(Level.SEVERE, "Exception to get transaction in" + this, e);
                    _sourceConnException = true;
                    _targetConnException = true;
                    continue;
                }

                if (_logger.isLoggable(Level.FINE)) {
                    _logger.log(Level.FINE, "enlist source in transaction " + transaction + " in " + this);
                }
                if (!doEnlistAndRollbackOnError(transaction, _tm, srh)) {
                    currentThrowable = srh.ex;
                    continue;
                }

                try {
                    if (_logger.isLoggable(Level.FINE)) {
                        _logger.log(Level.FINE, "Receiving(" + receiveTimeout + ") message from source in transaction " + transaction + " in " + this);
                    }
                    if (_fi.FAULT_INJECTION) {
                        _fi.setLogger(_logger);
                        _fi.checkFaultAndThrowException(FaultInjection.FAULT_RECEIVE_1, null, "javax.jms.JMSException", true);
                    }
                    m = _consumer.receive(receiveTimeout);
                    if (m == null) {
                        try {
                            String logmsg = ((receiveTimeout > 0L) ? _jbr.getKString(_jbr.W_SOURCE_CONN_CLOSED_OR_RECEIVE_TIMEOUT, this.toString())
                                    : _jbr.getKString(_jbr.W_SOURCE_CONN_CLOSED, this.toString()));
                            _logger.log(Level.WARNING, logmsg);
                        } catch (Throwable t) {
                        }
                        try {
                            _tm.rollback();
                        } catch (Throwable t1) {
                            try {
                                if (receiveTimeout == 0L) {
                                    _logger.log(Level.FINE,
                                            "Unable to rollback transaction " + transaction + " on closed source connection or receive() timeout ", t1);
                                } else {
                                    logWarning("Unable to rollback transaction " + transaction + " on closed source connection or receive() timeout ", t1);
                                }
                            } catch (Throwable t) {
                            }
                        }
                        continue;
                    }

                    msgCount++;
                    if (_logger.isLoggable(Level.FINE)) {
                        _logger.log(Level.FINE,
                                "Received message " + m + " from source in transaction " + transaction + " in " + this + ", msgCount=" + msgCount);
                    }
                    if (_fi.FAULT_INJECTION) {
                        _fi.setLogger(_logger);
                        _fi.checkFaultAndThrowException(FaultInjection.FAULT_RECEIVE_2, null, "javax.jms.JMSException", true);
                    }
                } catch (Throwable t) {
                    currentThrowable = t;
                    logWarning("Exception in receiving message in " + this, t);
                    try {
                        _tm.rollback();
                    } catch (Throwable t1) {
                        logWarning("Exception on rollback transaction " + transaction + " on receiving failure", t1);
                    }
                    continue;
                }
                if (!isTransactionActive(transaction, _tm)) {
                    continue;
                }

                srcmhs = MessageHeaders.getMessageHeaders(m);
                mid = srcmhs.mid;
                long ttl = srcmhs.expiration;
                if (ttl != 0L) {
                    ttl = ttl - System.currentTimeMillis();
                }
                if (ttl < 0) {
                    handleExpiredMessage(m, mid, transaction, _tm, srh);
                    continue;
                }
                if (!isTransactionActive(transaction, _tm)) {
                    continue;
                }

                if (!_targetStayConnected) {
                    try {
                        initTarget();
                    } catch (Exception e) {
                        _logger.log(Level.SEVERE, "Unable to connect to target in " + this, e);
                        try {
                            _tm.rollback();
                        } catch (Throwable t1) {
                            _logger.log(Level.WARNING,
                                    "Unable to rollback transaction " + transaction + " on init target failure for message " + mid + " in " + this, t1);
                        }
                        throw e;
                    }
                }
                if (!isTransactionActive(transaction, _tm)) {
                    continue;
                }

                Message sm = null;
                String midSent = null;

                try {
                    sm = handleMessageTransformer(m, srcmhs);
                } catch (Throwable t) {
                    _logger.log(Level.WARNING, _jbr.getString(_jbr.W_STOP_LINK_BECAUSE_OF, this, t.getMessage()), t);
                    throw t;
                }
                if (sm == null) {
                    _logger.log(Level.WARNING, _jbr.getString(_jbr.W_CONSUME_NO_TRANSFER, mid, this));
                    if (!isTransactionActive(transaction, _tm)) {
                        continue;
                    }

                } else {

                    if (((Refable) _targetCF).isEmbeded() && ((Refable) _sourceCF).isEmbeded()) {
                        trh.xar = srh.xar;
                    } else {
                        trh.xar = ((XASession) _targetSession).getXAResource();
                        if (!(_tm instanceof TransactionManagerImpl) && trh.xar.getClass().getName().equals(srh.xar.getClass().getName())) {
                            trh.xar = new XAResourceImpl(trh.xar);
                            _logger.log(Level.INFO, "Use XAResource wrapper " + trh.xar + " for target XAResource " + trh.xar.getClass().getName());
                        }
                        if (_logger.isLoggable(Level.FINE)) {
                            _logger.log(Level.FINE, "enlist target in transaction " + transaction + " in " + this);
                        }
                        if (!doEnlistAndRollbackOnError(transaction, _tm, trh)) {
                            currentThrowable = trh.ex;
                            continue;
                        }
                    }

                    try {
                        if (_logger.isLoggable(Level.FINE)) {
                            _logger.log(Level.FINE, "Sending message " + mid + " to target in transaction " + transaction + " in " + this);
                        }

                        if (_fi.FAULT_INJECTION) {
                            _fi.setLogger(_logger);
                            _fi.checkFaultAndThrowException(FaultInjection.FAULT_SEND_1, null, "javax.jms.JMSException", true);
                        }

                        MessageProducer producer = _producer;
                        if (_branchProducer != null) {
                            producer = _branchProducer;
                        }
                        if (!getTargetCurrentDestinationName().equals(toDestinationName(producer.getDestination()))) {
                            throw new BridgeException("Unexpected target producer's destination name " + toDestinationName(producer.getDestination())
                                    + ": not match current target destination name " + getTargetCurrentDestinationName());
                        }

                        try {
                            if (_parent.needTagBridgeName()) {
                                _parent.tagBridgeName(sm, _sourceSession.createMessage());
                            }
                            producer.send(sm, srcmhs.deliverymode, srcmhs.priority, ttl);
                            midSent = sm.getJMSMessageID();
                        } finally {
                            if (_branchProducer != null) {
                                try {
                                    _branchProducer.close();
                                } catch (Throwable t) {
                                    _logger.log(Level.WARNING, "Closing temporary target producer failed: " + t.getMessage() + " in " + this, t);
                                } finally {
                                    _branchProducer = null;
                                }
                            }
                            MessageHeaders.resetMessageHeaders(m, srcmhs);
                        }

                        if (_logger.isLoggable(Level.FINE)) {
                            _logger.log(Level.FINE, "Sent message " + mid + " to target in transaction " + transaction + " in " + this);
                        }
                        if (_fi.FAULT_INJECTION) {
                            _fi.setLogger(_logger);
                            _fi.checkFaultAndThrowException(FaultInjection.FAULT_SEND_2, null, "javax.jms.JMSException", true);
                        }
                    } catch (Throwable t) {
                        currentThrowable = t;
                        _logger.log(Level.SEVERE, "Unable to send message " + mid + " to target in " + this, t);
                        try {
                            _tm.rollback();
                        } catch (Throwable t1) {
                            _logger.log(Level.WARNING, "Unable to rollback transaction " + transaction + " on send failure for message " + mid + " in " + this,
                                    t1);
                        }
                        continue;
                    }

                    if (!isTransactionActive(transaction, _tm)) {
                        continue;
                    }

                    if (_logger.isLoggable(Level.FINE)) {
                        _logger.log(Level.FINE, "delist " + trh + " in transaction " + transaction + " in " + this);
                    }
                    if (trh.xar != srh.xar) {
                        if (!doDelistAndRollbackOnError(transaction, _tm, trh)) {
                            currentThrowable = trh.ex;
                            continue;
                        }
                    }

                } // sm != null

                if (!isTransactionActive(transaction, _tm)) {
                    continue;
                }

                if (_logger.isLoggable(Level.FINE)) {
                    _logger.log(Level.FINE, "delist " + srh + " in transaction " + transaction + " in " + this);
                }
                if (!doDelistAndRollbackOnError(transaction, _tm, srh)) {
                    currentThrowable = srh.ex;
                    continue;
                }

                if (_logger.isLoggable(Level.FINE)) {
                    _logger.log(Level.FINE, "COMMIT transaction " + transaction + " for message " + mid + " in " + this);
                }
                try {
                    _tm.commit();
                    String[] param = { mid, midSent, this.toString() };
                    if (_parent.logMessageTransfer()) {
                        _logger.log(Level.INFO, _jbr.getString(_jbr.I_MESSAGE_TRANSFER_SUCCESS, param));
                    } else if (_logger.isLoggable(Level.FINE)) {
                        _logger.log(Level.FINE, _jbr.getString(_jbr.I_MESSAGE_TRANSFER_SUCCESS, param));
                    }
                } catch (RollbackException e) {
                    _logger.log(Level.WARNING, "RollbackException on commit transaction " + transaction + " for message " + mid + " in " + this, e);
                    sendToDMQ(m, mid, DMQ.DMQReason.COMMIT_FAILURE, e);
                    continue;
                } catch (HeuristicMixedException e) {
                    _logger.log(Level.WARNING, "HeuristicMixedException on commit transaction " + transaction + " for message " + mid + " in " + this, e);
                    sendToDMQ(m, mid, DMQ.DMQReason.COMMIT_FAILURE, e);
                    continue;
                } catch (HeuristicRollbackException e) {
                    _logger.log(Level.WARNING, "HeuristicRollbackException on commit transaction " + transaction + " for message " + mid + " in " + this, e);
                    sendToDMQ(m, mid, DMQ.DMQReason.COMMIT_FAILURE, e);
                    continue;
                } catch (Throwable t) {
                    currentThrowable = t;
                    _logger.log(Level.SEVERE, "Failed to commit transaction " + transaction + " for message " + mid + " in " + this, t);
                    sendToDMQ(m, mid, DMQ.DMQReason.COMMIT_FAILURE, t);
                    continue;
                }

            } finally {
                doFinally(transaction, _tm, srh, trh);
                if (currentThrowable == null) {
                    consecutiveThrowables = 0;
                } else {
                    consecutiveThrowables++;
                    if (consecutiveThrowables > MAX_CONSECUTIVE_THROWABLES) {
                        throw new RuntimeException("Maximum consecutive exceptions exceeded", currentThrowable);
                    }

                }
            }
        }
    }

    private void logWarning(String msg, Throwable t) {
        if (_state == LinkState.STOPPING || _state == LinkState.STOPPED) {
            _logger.log(Level.WARNING, msg + ": " + t.getMessage());
        } else {
            _logger.log(Level.WARNING, msg, t);
        }
    }

    private void sendToDMQ(Message m, String mid, DMQ.DMQReason reason, Throwable t) throws Throwable {
        try {
            _parent.toDMQ(m, mid, reason, t, this);
        } catch (Throwable t1) {
            _logger.log(Level.SEVERE, "Failed to send " + reason + " message " + mid + " to DMQ in " + this, t1);
            throw t1;
        }
        return;
    }

    private void handleExpiredMessage(Message m, String mid, Transaction tx, TransactionManager tm, XAResourceHandle sourceRH) throws Throwable {

        String[] param = { mid, sourceRH.toString(), tx.toString(), this.toString() };
        _logger.log(Level.INFO, _jbr.getString(_jbr.I_TXN_MESSAGE_EXPIRED, param));
        try {
            sendToDMQ(m, mid, DMQ.DMQReason.MESSAGE_EXPIRED, (Throwable) null);
        } finally {
            try {
                tm.rollback();
            } catch (Throwable t1) {
                _logger.log(Level.WARNING, "Unable to rollback transaction " + tx + " for expired message " + mid + " in " + this, t1);
            }
        }
    }

    private boolean doEnlistAndRollbackOnError(Transaction tx, TransactionManager tm, XAResourceHandle rh) {
        try {
            rh.enlisted = tx.enlistResource(rh.xar);
        } catch (RollbackException e) {
            _logger.log(Level.SEVERE, "The transaction " + tx + " is marked rollback only by " + rh + " in " + this, e);
            try {
                tm.rollback();
            } catch (Throwable t) {
                _logger.log(Level.SEVERE, "Exception in rollback transacion " + tx + " after enlist returned rollback-only in " + this, t);
            }
            rh.ex = new RuntimeException("The transaction " + tx + " is marked rollback only by " + rh + " in " + this, e);
            return false;
        } catch (Throwable t) {
            _logger.log(Level.SEVERE, "Exception to enlist " + rh + " to transaction " + tx + " in " + this, t);
            try {
                tm.rollback();
            } catch (Throwable t1) {
                _logger.log(Level.SEVERE, "Exception in rollback transacion " + tx + " after enlist " + rh + " failure in " + this, t1);
            }
            rh.ex = new RuntimeException("Exception to enlist " + rh + " to transaction " + tx + " in " + this, t);
            return false;
        }
        if (!rh.enlisted) {
            _logger.log(Level.SEVERE, rh + " was not enlisted to transaction " + tx + " successfully in " + this);
            try {
                tm.rollback();
            } catch (Throwable t) {
                _logger.log(Level.SEVERE, "Exception in rollback transacion " + tx + " after enlist " + rh + " failure in " + this, t);
            }
            rh.ex = new RuntimeException(rh + " was not enlisted to transaction " + tx + " successfully in " + this);
            return false;
        }
        return true;
    }

    private boolean doDelistAndRollbackOnError(Transaction tx, TransactionManager tm, XAResourceHandle rh) {
        try {
            rh.delisted = tx.delistResource(rh.xar, XAResource.TMSUCCESS);
        } catch (Throwable t) {
            _logger.log(Level.WARNING, "Unable delist " + rh + " from transaction " + tx + " in " + this, t);
            try {
                tm.rollback();
            } catch (Throwable t1) {
                _logger.log(Level.WARNING, "Unable to rollback transaction " + tx + " after delist " + rh + " failure in " + this, t1);
            }
            rh.ex = new RuntimeException("Unable delist " + rh + " from transaction " + tx + " in " + this, t);
            return false;
        }

        if (!rh.delisted) {
            _logger.log(Level.SEVERE, rh + " was not delisted from transaction " + tx + " successfully in " + this);
            try {
                tm.rollback();
            } catch (Exception e) {
                _logger.log(Level.SEVERE, "Exception in rollback transacion " + tx + " in " + this, e);
            }
            rh.ex = new RuntimeException(rh + " was not delisted from transaction " + tx + " successfully in " + this);
            return false;
        }
        return true;
    }

    private void doFinally(Transaction tx, TransactionManager tm, XAResourceHandle sourceRH, XAResourceHandle targetRH) {
        if (tx != null) {
            int status = Status.STATUS_ACTIVE;
            try {
                status = tx.getStatus();
            } catch (Throwable t) {
                _logger.log(Level.WARNING, "Unable to get transaction " + tx + " status in " + this, t);
            }
            if (status != Status.STATUS_NO_TRANSACTION) {
                if (sourceRH.enlisted && !sourceRH.delisted) {
                    try {
                        tx.delistResource(sourceRH.xar, XAResource.TMFAIL);
                    } catch (Throwable t) {
                        _logger.log(Level.WARNING, "Unable to delist " + sourceRH + " in transaction " + tx + " " + this + ": " + t.getMessage());
                    }
                }
                if (targetRH != null && targetRH.xar != sourceRH.xar && targetRH.enlisted && !targetRH.delisted) {
                    try {
                        tx.delistResource(targetRH.xar, XAResource.TMFAIL);
                    } catch (Throwable t) {
                        _logger.log(Level.WARNING, "Unable to delist " + targetRH + " in transaction " + tx + " " + this + ": " + t.getMessage());
                    }
                }
                _sourceConnException = true;
                _targetConnException = true;
            }
            try {
                status = tx.getStatus();
            } catch (Throwable t) {
                _logger.log(Level.WARNING, "Unable to get transaction " + tx + " status in " + this, t);
            }
            if (status != Status.STATUS_NO_TRANSACTION && status != Status.STATUS_COMMITTED && status != Status.STATUS_COMMITTING
                    && status != Status.STATUS_ROLLEDBACK && status != Status.STATUS_ROLLING_BACK && status != Status.STATUS_UNKNOWN
                    && status != Status.STATUS_MARKED_ROLLBACK) {
                _logger.log(Level.WARNING, "Rolling back transaction (status=" + status + ")" + tx + " in " + this);
                try {
                    tm.rollback();
                } catch (Throwable t) {
                    _logger.log(Level.WARNING, "Exception to rollback transaction " + tx + " in " + this, t);
                }
            }
        }
        if (!_targetStayConnected) {
            if (_logger.isLoggable(Level.FINE)) {
                _logger.log(Level.FINE, "Close target in " + this);
            }
            closeTarget();
        }
    }

    /**
     * return true if transaction can continue
     */
    private boolean isTransactionActive(Transaction tx, TransactionManager tm) {
        boolean rollback = false;
        int status = Status.STATUS_ACTIVE;
        try {
            status = tx.getStatus();
        } catch (Throwable t) {
            _logger.log(Level.SEVERE, "Unable to get transaction " + tx + " status in " + this, t);
            rollback = true;
        }
        if (!rollback) {
            switch (status) {
            case Status.STATUS_ACTIVE:
                return true;
            case Status.STATUS_COMMITTED:
                _logger.log(Level.WARNING, "Unexpected STATUS_COMMITTED for transaction " + tx + " in " + this);
                return false;
            case Status.STATUS_COMMITTING:
                _logger.log(Level.WARNING, "Unexpected STATUS_COMMITTED for transaction " + tx + " in " + this);
                return false;
            case Status.STATUS_MARKED_ROLLBACK:
                _logger.log(Level.WARNING, "Transaction " + tx + " marked rollback, rolling back ... in " + this);
                rollback = true;
                break;
            case Status.STATUS_NO_TRANSACTION:
                _logger.log(Level.WARNING, "Transaction " + tx + " has STATUS_NO_TRANSACTION");
                return false;
            case Status.STATUS_PREPARED:
                _logger.log(Level.WARNING, "Unexpected STATUS_PREPARED for transaction " + tx + ", rolling back ... in " + this);
                rollback = true;
                break;
            case Status.STATUS_PREPARING:
                _logger.log(Level.WARNING, "Unexpected STATUS_PREPARING for transaction " + tx + ", set rollback only ... in " + this);
                try {
                    tx.setRollbackOnly();
                } catch (Throwable t) {
                    _logger.log(Level.WARNING, "Unable to set transaction " + tx + " rollback only in " + this);
                }
                rollback = true;
            case Status.STATUS_ROLLEDBACK:
                _logger.log(Level.WARNING, "Transaction " + tx + " has STATUS_ROLLEDBACK in " + this);
                return false;
            case Status.STATUS_ROLLING_BACK:
                _logger.log(Level.WARNING, "Transaction " + tx + " has STATUS_ROLLING_BACK in " + this);
                return false;
            case Status.STATUS_UNKNOWN:
                _logger.log(Level.WARNING, "Unexpected STATUS_UNKNOWN for transaction " + tx + ", rolling back ... in " + this);
                rollback = true;
                break;
            default:
                _logger.log(Level.WARNING, "Unexpected status " + status + " for transaction " + tx + ", rolling back ... in " + this);
                rollback = true;
                break;
            }
        }
        try {
            tm.rollback();
        } catch (Throwable t) {
            _logger.log(Level.WARNING, "Exception in rollback transacion " + tx + " in " + this, t);
        }
        return false;
    }

    private void runNonTransacted() throws Throwable {
        long msgCount = 0;

        int consecutiveThrowables = 0;

        while (_state != LinkState.STOPPING && _state != LinkState.STOPPED) {

            if (Thread.currentThread().isInterrupted()) {
                throw new InterruptedException(_jbr.getKString(_jbr.X_LINK_INTERRUPTED, this.toString()));
            }

            _branchProducer = null;
            _targetCurrentDestinationName = null;
            Throwable currentThrowable = null;
            Message m = null;
            MessageHeaders srcmhs = null;
            String mid = null;
            try {

                if (_sourceConnException) {
                    closeSource();
                    initSource();
                    resume(false);
                }

                if (_targetConnException) {
                    closeTarget();
                    if (_targetStayConnected) {
                        initTarget();
                    }
                }

                try {
                    if (_logger.isLoggable(Level.FINE)) {
                        _logger.log(Level.FINE, "Receiving message from source in " + this + " ...");
                    }
                    if (_fi.FAULT_INJECTION) {
                        _fi.setLogger(_logger);
                        _fi.checkFaultAndThrowException(FaultInjection.FAULT_RECEIVE_1, null, "javax.jms.JMSException", true);
                    }
                    m = _consumer.receive();
                    if (m == null) {
                        try {
                            _logger.log(Level.WARNING, "receive() returned null,  source connection may have closed in " + this);
                        } catch (Throwable e) {
                        }
                        continue;
                    }

                    msgCount++;
                    if (_logger.isLoggable(Level.FINE)) {
                        _logger.log(Level.FINE, "Received message " + m + " from source in " + this + ", msgCount=" + msgCount);
                    }
                    if (_fi.FAULT_INJECTION) {
                        _fi.setLogger(_logger);
                        _fi.checkFaultAndThrowException(FaultInjection.FAULT_RECEIVE_2, null, "javax.jms.JMSException", true);
                    }
                } catch (Throwable t) {
                    currentThrowable = t;
                    logWarning("Exception in receiving message: " + t.getMessage() + " in " + this, t);

                    if (_state == LinkState.STOPPING || _state == LinkState.STOPPED) {
                        return;
                    }

                    closeSource();
                    _sourceConnException = true;
                    continue;
                }

                srcmhs = MessageHeaders.getMessageHeaders(m);
                mid = srcmhs.mid;
                long ttl = srcmhs.expiration;
                if (ttl != 0L) {
                    ttl = ttl - System.currentTimeMillis();
                }
                if (ttl < 0) {
                    _logger.log(Level.INFO, _jbr.getString(_jbr.I_NONTXN_MESSAGE_EXPIRED, mid, this.toString()));
                    try {
                        sendToDMQ(m, mid, DMQ.DMQReason.MESSAGE_EXPIRED, (Throwable) null);
                    } finally {
                        closeSource();
                        _sourceConnException = true;
                        continue;
                    }
                }

                if (_targetConnException || !_targetStayConnected) {
                    if (_targetConnException) {
                        closeTarget();
                    }
                    try {
                        initTarget();
                    } catch (Exception e) {
                        _logger.log(Level.SEVERE, "Unable to connect to target for message " + mid + " in " + this);
                        throw e;
                    }
                }

                Message sm = null;
                String midSent = null;

                try {
                    sm = handleMessageTransformer(m, srcmhs);
                } catch (Throwable t) {
                    _logger.log(Level.WARNING, _jbr.getString(_jbr.W_STOP_LINK_BECAUSE_OF, this, t.getMessage()), t);
                    throw t;
                }
                if (sm == null) {
                    _logger.log(Level.WARNING, _jbr.getString(_jbr.W_CONSUME_NO_TRANSFER, mid, this));

                } else {

                    try {
                        if (_logger.isLoggable(Level.FINE)) {
                            _logger.log(Level.FINE, "Sending message " + mid + " to target in " + this);
                        }
                        if (_fi.FAULT_INJECTION) {
                            _fi.setLogger(_logger);
                            _fi.checkFaultAndThrowException(FaultInjection.FAULT_SEND_1, null, "javax.jms.JMSException", true);
                        }

                        MessageProducer producer = _producer;
                        if (_branchProducer != null) {
                            producer = _branchProducer;
                        }
                        if (!getTargetCurrentDestinationName().equals(toDestinationName(producer.getDestination()))) {
                            throw new BridgeException("Unexpected target producer's destination name " + toDestinationName(producer.getDestination())
                                    + ": not match current target destination name " + getTargetCurrentDestinationName());
                        }

                        try {
                            if (_parent.needTagBridgeName()) {
                                _parent.tagBridgeName(sm, _sourceSession.createMessage());
                            }
                            producer.send(sm, srcmhs.deliverymode, srcmhs.priority, ttl);
                            midSent = sm.getJMSMessageID();
                        } finally {
                            if (_branchProducer != null) {
                                try {
                                    _branchProducer.close();
                                } catch (Throwable t) {
                                    _logger.log(Level.WARNING, "Closing temporary target producer failed: " + t.getMessage() + " in " + this, t);
                                } finally {
                                    _branchProducer = null;
                                }
                            }
                            MessageHeaders.resetMessageHeaders(m, srcmhs);
                        }

                        if (_logger.isLoggable(Level.FINE)) {
                            _logger.log(Level.FINE, "Sent message " + mid + " to target in " + this);
                        }
                        if (_fi.FAULT_INJECTION) {
                            _fi.setLogger(_logger);
                            _fi.checkFaultAndThrowException(FaultInjection.FAULT_SEND_2, null, "javax.jms.JMSException", true);
                        }
                    } catch (Throwable t) {
                        currentThrowable = t;
                        _logger.log(Level.SEVERE, "Unable to send message " + mid + " to target in " + this, t);
                        try {
                            sendToDMQ(m, mid, DMQ.DMQReason.SEND_FAILURE, t);
                        } finally {
                            try {
                                _sourceSession.recover(); // XXX
                            } catch (Throwable t1) {
                                _logger.log(Level.WARNING, "Unable to recover session for expired message " + mid + " in " + this, t1);
                                closeSource();
                                _sourceConnException = true;
                            }
                            closeTarget();
                            _targetConnException = true;
                            continue;
                        }
                    }

                } // sm != null

                try {
                    if (_fi.FAULT_INJECTION) {
                        _fi.setLogger(_logger);
                        _fi.checkFaultAndThrowException(FaultInjection.FAULT_ACK_1, null, "javax.jms.JMSException", true);
                    }
                    if (((Refable) _sourceCF).getRefed() instanceof com.sun.messaging.ConnectionFactory) {
                        ((com.sun.messaging.jmq.jmsclient.MessageImpl) m).acknowledgeThisMessage();
                    } else {
                        m.acknowledge();
                    }
                    String[] param = { mid, midSent, this.toString() };
                    if (_parent.logMessageTransfer()) {
                        _logger.log(Level.INFO, _jbr.getString(_jbr.I_MESSAGE_TRANSFER_SUCCESS, param));
                    } else if (_logger.isLoggable(Level.FINE)) {
                        _logger.log(Level.FINE, _jbr.getString(_jbr.I_MESSAGE_TRANSFER_SUCCESS, param));
                    }
                    if (_fi.FAULT_INJECTION) {
                        _fi.setLogger(_logger);
                        _fi.checkFaultAndThrowException(FaultInjection.FAULT_ACK_2, null, "javax.jms.JMSException", true);
                    }
                } catch (Throwable t) {
                    currentThrowable = t;
                    _logger.log(Level.SEVERE, "Failed to acknowledge message " + mid + " in " + this, t);
                    sendToDMQ(m, mid, DMQ.DMQReason.ACK_FAILURE, t);
                }
                continue;

            } finally {

                if (!_targetStayConnected) {
                    closeTarget();
                }
                if (currentThrowable == null) {
                    consecutiveThrowables = 0;
                } else {
                    consecutiveThrowables++;
                    if (consecutiveThrowables > MAX_CONSECUTIVE_THROWABLES) {
                        throw new RuntimeException("Maximum consecutive exceptions exceeded", currentThrowable);
                    }
                }
            }
        }
    }

    /**
     * @param m The message to be transformed
     * @param mid The JMSMessageID of 'm' for logging convenience
     *
     * @return a Message object that is tranformed from 'm' or null to inform caller to consume 'm' from source and no
     * forward to target
     * @exception to inform caller that the link must be stopped
     *
     */
    private Message handleMessageTransformer(Message m, MessageHeaders srcmhs) throws Throwable {
        Message msgToSend = m;
        String mid = srcmhs.mid;

        if (_logger.isLoggable(Level.FINE)) {
            _logger.log(Level.FINE, "Retain JMSReplyTo " + _retainReplyTo + " for message " + mid + " in " + this);
        }

        if (!_retainReplyTo) {
            try {
                if (_logger.isLoggable(Level.FINE)) {
                    _logger.log(Level.FINE, "Setting JMSReplyTo null for message " + mid + " in " + this);
                }
                msgToSend.setJMSReplyTo((Destination) null);
            } catch (Throwable t) {
                _logger.log(Level.WARNING, "setJMSReplyTo(null) failed: " + t.getMessage() + " in " + this, t);
            }
        }

        boolean transformed = false;
        Destination asSourceDest = m.getJMSDestination();

        if (_msgTransformer != null) {

            _msgTransformer.init(_targetSession, Bridge.JMS_TYPE);
            if (_logger.isLoggable(Level.FINE)) {
                _logger.log(Level.FINE, "Transforming message " + mid + " using " + _msgTransformer.getClass().getName() + " in " + this);
            }
            try {
                try {
                    msgToSend = _msgTransformer.transform(m, true, null, getSourceProviderName(), getTargetProviderName(), _msgTransformerProps);
                    transformed = true;
                    if (msgToSend == null) {
                        throw new BridgeException(
                                _jbr.getKString(_jbr.X_NULL_RETURN_FROM_FOR_MESSAGE, _msgTransformer.getClass().getName() + ".transform()", mid));
                    }
                } finally {
                    MessageHeaders.resetMessageHeaders(m, srcmhs);
                }
                if (_fi.FAULT_INJECTION) {
                    _fi.setLogger(_logger);
                    _fi.checkFaultAndThrowException(FaultInjection.FAULT_TRANSFORM_2, null, "javax.jms.JMSException", true);
                }

                if (_msgTransformer.isNoTransfer()) {

                    String[] param = { "MessageTransformer.transform()", mid, this.toString() };
                    _logger.log(Level.INFO, _jbr.getString(_jbr.I_INSTRUCTED_NO_TRANSFER_AND_CONSUME, param));

                    if (_firstTransformerNoTransfer) {
                        sendToDMQ(m, mid, DMQ.DMQReason.FIRST_TRANSFORMER_NOTRANSFER, null);
                        _firstTransformerNoTransfer = false;
                    }
                    return null;
                }
            } catch (Throwable t) {
                if (_consumeOnTransformError && (!transformed || msgToSend == null)) {
                    _logger.log(Level.WARNING, "Exception from message transformer: " + t.getMessage() + " for message " + m + " in " + this, t);
                    sendToDMQ(m, mid, DMQ.DMQReason.TRANSFORMER_FAILURE, t);
                    return null;
                }
                throw t;
            }
            if (_logger.isLoggable(Level.FINE)) {
                StringBuffer buf = new StringBuffer();
                buf.append("Transformed message " + mid);
                try {
                    buf.append(" to " + msgToSend + " in " + this);
                } catch (Throwable t) {
                    buf.append(" in " + this);
                }
                _logger.log(Level.FINE, buf.toString());
            }

        } // if (_msgTransformer != null)

        handleBranchTo(m, msgToSend, mid, transformed, asSourceDest);

        return msgToSend;
    }

    /**
     * Exception from this call will cause link stop
     */
    private void handleBranchTo(Message oldm, Message newm, String mid, boolean transformed, Destination asSourceDest) throws Throwable {
        _branchProducer = null;

        if (!transformed) {
            if (_unidentifiedProducer) {
                _targetCurrentDestinationName = toDestinationName(asSourceDest);
                _branchProducer = createProducer(asSourceDest, mid, false);
                String[] param = { mid, "Message.getJMSDestination:" + getTargetCurrentDestinationName(), this.toString() };
                _logger.log(Level.INFO, _jbr.getString(_jbr.I_TRANSFER_TO_GETJMSDESTINATION, param));
            }
            return;
        }
        Object d = _msgTransformer.getBranchTo();
        if (d == null) {
            if (_unidentifiedProducer) {
                _targetCurrentDestinationName = toDestinationName(asSourceDest);
                _branchProducer = createProducer(asSourceDest, mid, false);
                /*
                 * if (newm.getJMSDestination() != asSourceDest) { String[] param = { mid,
                 * "Message.getJMSDestination:"+getTargetCurrentDestinationName(),
                 * "Message.getJMSDestination:"+toDestinationName(oldm.getJMSDestination()), this.toString() }; _logger.log(Level.INFO,
                 * _jbr.getString(_jbr.I_TRANSFORMER_TRANSFER_TO_GETJMSDESTINATION_DIFF, param)); if (_firstTransformerAsSourceChange) {
                 * sendToDMQ(oldm, mid, DMQ.DMQReason.FIRST_TRANSFORMER_AS_SOURCE_CHANGE, null); _firstTransformerAsSourceChange =
                 * false; } } else {
                 */
                String[] param = { mid, "Message.getJMSDestination:" + getTargetCurrentDestinationName(), this.toString() };
                _logger.log(Level.INFO, _jbr.getString(_jbr.I_TRANSFORMER_TRANSFER_TO_GETJMSDESTINATION, param));
            }
            return;
        }

        _branchProducer = createProducer(d, mid, true);
        _targetCurrentDestinationName = toDestinationName(_branchProducer.getDestination());
        String[] param = { mid,
                ((d instanceof String) ? "[" + JMSBridgeXMLConstant.Target.DESTINATIONREF + ":" + d + "]" : "") + getTargetCurrentDestinationName(),
                this.toString() };
        _logger.log(Level.INFO, _jbr.getString(_jbr.I_TRANSFORMER_BRANCHTO, param));
        if (_firstTransformerBranchTo) {
            sendToDMQ(oldm, mid, DMQ.DMQReason.FIRST_TRANSFORMER_BRANCHTO, null);
            _firstTransformerBranchTo = false;
        }
    }

    public LinkState getState() {
        return _state;
    }
}
