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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).
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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2011, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jboss.ejb.client;

import java.util.Random;
import java.util.concurrent.atomic.AtomicInteger;

import javax.transaction.HeuristicMixedException;
import javax.transaction.HeuristicRollbackException;
import javax.transaction.NotSupportedException;
import javax.transaction.RollbackException;
import javax.transaction.Status;
import javax.transaction.SystemException;
import javax.transaction.UserTransaction;
import javax.transaction.xa.XAException;

/**
 * The transaction context for manual control of transactions on a remote node.
 *
 * @author David M. Lloyd
 */
public final class EJBClientUserTransactionContext extends EJBClientTransactionContext {

    static final EJBClientUserTransactionContext INSTANCE = new EJBClientUserTransactionContext();

    /**
     * User transaction objects are bound to a single source thread; we do not support suspending or resuming
     * transactions in this simple mode.  Asynchronous invocations use the value from the source thread.
     */
    private static final ThreadLocal CURRENT_TRANSACTION_STATE = new ThreadLocal();

    /**
     * {@inheritDoc}
     */
    protected UserTransactionID getAssociatedTransactionID(final EJBClientInvocationContext invocationContext) {
        final State state = CURRENT_TRANSACTION_STATE.get();
        return state == null ? null : state.currentId;
    }

    protected String getTransactionNode() {
        final State state = CURRENT_TRANSACTION_STATE.get();
        final UserTransactionID id = state == null ? null : state.currentId;
        return id == null ? null : id.getNodeName();
    }

    /**
     * {@inheritDoc}
     */
    protected UserTransaction getUserTransaction(String nodeName) {
        return new UserTransactionImpl(nodeName);
    }

    private static final AtomicInteger idCounter = new AtomicInteger(new Random().nextInt());

    static class State {
        UserTransactionID currentId;
        int status = Status.STATUS_NO_TRANSACTION;

        State() {
        }
    }

    class UserTransactionImpl implements UserTransaction {
        private final String nodeName;

        UserTransactionImpl(final String nodeName) {
            this.nodeName = nodeName;
        }

        public void begin() throws NotSupportedException, SystemException {
            State state = CURRENT_TRANSACTION_STATE.get();
            if (state == null) {
                CURRENT_TRANSACTION_STATE.set(state = new State());
            }
            if (state.currentId != null) {
                throw Logs.MAIN.txAlreadyAssociatedWithThread();
            }
            final UserTransactionID transactionID = new UserTransactionID(nodeName, idCounter.getAndAdd(127));
            state.currentId = transactionID;
            state.status = Status.STATUS_ACTIVE;
        }

        public void commit() throws RollbackException, HeuristicMixedException, HeuristicRollbackException, SecurityException, IllegalStateException, SystemException {
            final State state = CURRENT_TRANSACTION_STATE.get();
            if (state == null || state.currentId == null) {
                throw Logs.MAIN.noTxAssociatedWithThread();
            }
            if (state.status != Status.STATUS_ACTIVE && state.status != Status.STATUS_MARKED_ROLLBACK) {
                throw Logs.MAIN.txNotActiveForThread();
            }
            final UserTransactionID transactionID = state.currentId;
            try {
                final EJBClientContext clientContext = EJBClientContext.requireCurrent();
                final EJBReceiverContext receiverContext = clientContext.requireNodeEJBReceiverContext(nodeName);
                final EJBReceiver receiver = receiverContext.getReceiver();
                if (state.status == Status.STATUS_MARKED_ROLLBACK) {
                    state.status = Status.STATUS_ROLLING_BACK;
                    try {
                        receiver.sendRollback(receiverContext, transactionID);
                    } catch (Throwable ignored) {
                        // log it maybe?
                    }
                    throw new RollbackException("Transaction marked for rollback only");
                } else {
                    state.status = Status.STATUS_COMMITTING;
                    try {
                        receiver.sendCommit(receiverContext, transactionID, true);
                    } catch (XAException e) {
                        if (e.errorCode >= XAException.XA_RBBASE && e.errorCode <= XAException.XA_RBEND) {
                            throw new RollbackException(e.getMessage());
                        }
                        if (e.errorCode == XAException.XA_HEURMIX) {
                            throw new HeuristicMixedException(e.getMessage());
                        }
                        if (e.errorCode == XAException.XA_HEURRB) {
                            throw new HeuristicRollbackException(e.getMessage());
                        }
                        throw new SystemException(e.getMessage());
                    }
                }
            } finally {
                state.currentId = null;
                state.status = Status.STATUS_NO_TRANSACTION;
            }
        }

        public void rollback() throws IllegalStateException, SecurityException, SystemException {
            final State state = CURRENT_TRANSACTION_STATE.get();
            if (state == null || state.currentId == null) {
                throw Logs.MAIN.noTxAssociatedWithThread();
            }
            if (state.status != Status.STATUS_ACTIVE && state.status != Status.STATUS_MARKED_ROLLBACK) {
                throw Logs.MAIN.txNotActiveForThread();
            }
            final UserTransactionID transactionID = state.currentId;
            try {
                final EJBClientContext clientContext = EJBClientContext.requireCurrent();
                final EJBReceiverContext receiverContext = clientContext.requireNodeEJBReceiverContext(nodeName);
                final EJBReceiver receiver = receiverContext.getReceiver();
                state.status = Status.STATUS_ROLLING_BACK;
                try {
                    receiver.sendRollback(receiverContext, transactionID);
                } catch (XAException e) {
                    throw new SystemException(e.getMessage());
                }
            } finally {
                state.currentId = null;
                state.status = Status.STATUS_NO_TRANSACTION;
            }
        }

        public void setRollbackOnly() throws IllegalStateException, SystemException {
            final State state = CURRENT_TRANSACTION_STATE.get();
            if (state != null) switch (state.status) {
                case Status.STATUS_ROLLING_BACK:
                case Status.STATUS_ROLLEDBACK:
                case Status.STATUS_MARKED_ROLLBACK: {
                    // nothing to do
                    return;
                }
                case Status.STATUS_ACTIVE: {
                    // mark rollback
                    state.status = Status.STATUS_MARKED_ROLLBACK;
                    return;
                }
            }
            throw new IllegalStateException("Transaction not active");
        }

        public int getStatus() throws SystemException {
            final State state = CURRENT_TRANSACTION_STATE.get();
            return state == null ? Status.STATUS_NO_TRANSACTION : state.status;
        }

        public void setTransactionTimeout(int seconds) throws SystemException {
            if (seconds < 0) {
                seconds = 0;
            }
            State state = CURRENT_TRANSACTION_STATE.get();
            if (state == null) {
                CURRENT_TRANSACTION_STATE.set(state = new State());
            }
        }
    }
}