alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Glassfish example source code file (MessageEndpointInvocationHandler.java)

This example Glassfish source code file (MessageEndpointInvocationHandler.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Glassfish tags/keywords

invocationhandler, javaeetransactionmanager, log, logging, message_endpoint, message_endpoint, messagebeanprotocolmanager, messageendpointinvocationhandler, method, method, object, object, reflection, runtimeexception, string, string, throwable

The Glassfish MessageEndpointInvocationHandler.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.enterprise.connectors.inbound;

import com.sun.enterprise.connectors.ConnectorRuntime;
import com.sun.logging.LogDomains;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.logging.Level;
import java.util.logging.Logger;

import com.sun.enterprise.transaction.api.JavaEETransactionManager;
import com.sun.appserv.connectors.internal.api.ConnectorConstants;
import org.glassfish.ejb.api.MessageBeanListener;
import org.glassfish.ejb.api.MessageBeanProtocolManager;

/**
 * This class handles the implementation of two interfaces:
 * 1) javax.resource.spi.endpoint.MessageEndpoint;
 * 2) any message listener type (e.g. javax.jms.MessageListener,
 * OR javax.xml.messaging.OnewayListener)
 *
 * @author Qingqing Ouyang
 */

public final class MessageEndpointInvocationHandler
        implements InvocationHandler {

    private MessageBeanListener listener_;
    private boolean beforeDeliveryCalled = false;

    private boolean throwTransactedExceptions_ = true;
    private MessageBeanProtocolManager messageBeanPM_;

    private static final String MESSAGE_ENDPOINT
            = "javax.resource.spi.endpoint.MessageEndpoint";

    private static final String THROW_TRANSACTED_EXCEPTIONS_PROP
            = "resourceadapter.throw.transacted.exceptions";

    private static final Logger logger =
            LogDomains.getLogger(MessageEndpointInvocationHandler.class, LogDomains.RSR_LOGGER);

    //private final Agent callFlowAgent = Switch.getSwitch().getCallFlowAgent();

    /**
     * Constructs a MessageEndpointInvocationHandler.
     *
     * @param listener <code>MessageBeanListener to deliver messages.
     * @param pm       Protocol object to MDB container.
     */
    public MessageEndpointInvocationHandler(MessageBeanListener listener,
                                            MessageBeanProtocolManager pm) {
        this.listener_ = listener;
        this.messageBeanPM_ = pm;

        throwTransactedExceptions_ =
                ConnectorConstants.THROW_TRANSACTED_EXCEPTIONS;

        if (throwTransactedExceptions_ != true) {
            logger.info(ConnectorConstants.THROW_TRANSACTED_EXCEPTIONS_PROP +
                    " set to false");
        }

    }

    /**
     * Invokes the method
     *
     * @param proxy  Object
     * @param method <code>Method to be executed.
     * @param args   Arguments
     * @throws Throwable.
     */
    public Object invoke(Object proxy, Method method, Object[] args)
            throws Throwable {

        // NOTE : be careful with "args" parameter.  It is null
        //        if method signature has 0 arguments.

        String methodClassName = method.getDeclaringClass().getName();
        String methodName = method.getName();
        Object returnValue = null;

        if (logger.isLoggable(Level.FINEST)) {

            String msg = "Invoking method [" + methodName
                    + "] from class [" + methodClassName + "]";
            logger.log(Level.FINEST, msg);
        }

        // delegate the beforeDelivery and afterDelivery calls
        // to the MDB container
        if (MESSAGE_ENDPOINT.equals(methodClassName)) {

            if ("beforeDelivery".equals(methodName)) {
                Method onMessageMethod = (Method) args[0];
                beforeDeliveryCalled = true;
                listener_.beforeMessageDelivery(onMessageMethod, false);

            } else if ("afterDelivery".equals(methodName)) {
                beforeDeliveryCalled = false; //reset
                listener_.afterMessageDelivery();

            } else if ("release".equals(methodName)) {
                messageBeanPM_.destroyMessageBeanListener(listener_);
            } else {
                logger.log(Level.SEVERE, "endpointfactory.method_not_defined",
                        new Object[]{methodName, MESSAGE_ENDPOINT});
                throw new RuntimeException(methodName);
            }

        } else if ("java.lang.Object".equals(methodClassName)) {
            returnValue = invokeJavaObjectMethod(this, method, args);

        } else { //the rest are considered methods for message delivery

            //RA did not call beforeDelivery, handle it here
            if (!beforeDeliveryCalled) {
                JavaEETransactionManager txManager =
                        ConnectorRuntime.getRuntime().getTransactionManager();
                boolean txImported = (txManager.getTransaction() != null);
                listener_.beforeMessageDelivery(method, txImported);
            }

            try {
                //returnValue = listener_.deliverMessage(method, args);
                //TODO startCallFlowAgent();


                returnValue = listener_.deliverMessage(args);
            } catch (Throwable ex) {
                if (messageBeanPM_.isDeliveryTransacted(method)) {
                    if (throwTransactedExceptions_) {
                        throw ex;
                    } else {
                        logger.log(Level.INFO, "Resource adapter eating " +
                                " transacted exception", ex);
                    }
                } else {
                    throw ex;
                }
            } finally {
                //TODO stopCallFlowAgent();

                //assume that if the RA didn't call beforeDelivery, it
                //would not call afterDelivery.  o.w. it will be hard to
                //to determine when to pair the afterDelivery call.
                if (!beforeDeliveryCalled) {
                    listener_.afterMessageDelivery();
                }
                beforeDeliveryCalled = false;
            }
        }
        return returnValue;
    }

/*
    private void stopCallFlowAgent() {
        // Send end notification to call flow agent
        try{
                    callFlowAgent.endTime();
                    callFlowAgent.requestEnd();
                } catch (Exception ex){
            logger.log(Level.WARNING, "Call Flow Agent threw exception" + ex);
        }
    }

    private void startCallFlowAgent() {
        // Notify Call Flow Agent.
        try{
            	    callFlowAgent.requestStart(
                            RequestType.REMOTE_ASYNC_MESSAGE);
            	    callFlowAgent.startTime(
                            ContainerTypeOrApplicationType.EJB_CONTAINER);
                    // This is an opportunity to provide callerIPAddress and
            // remote user name. But since this information is not
            // currently available. So, we don't call
            // callFlowAgent.setRequestInfo().
        } catch (Exception ex){
            logger.log(Level.WARNING, "Call Flow Agent threw exception" + ex);
        }
    }
*/

    /**
     * This is the same implementation in
     * com.sun.ejb.container.InvocationHandlerUtil
     * Need to abstract out at some point.
     */
    private Object invokeJavaObjectMethod(
            InvocationHandler handler, Method method, Object[] args)
            throws RuntimeException {

        Object returnValue = null;

        // Can only be one of :
        //     boolean java.lang.Object.equals(Object)
        //     int     java.lang.Object.hashCode()
        //     String  java.lang.Object.toString()
        //
        // Optimize by comparing as few characters as possible.

        switch (method.getName().charAt(0)) {
            case 'e':
                Object other = Proxy.isProxyClass(args[0].getClass()) ?
                        Proxy.getInvocationHandler(args[0]) : args[0];
                returnValue = new Boolean(handler.equals(other));
                break;
            case 'h':
                returnValue = new Integer(handler.hashCode());
                break;
            case 't':
                returnValue = handler.toString();
                break;
            default:
                throw new RuntimeException(method.getName());
        }

        return returnValue;
    }
}

Other Glassfish examples (source code examples)

Here is a short list of links related to this Glassfish MessageEndpointInvocationHandler.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.