Glassfish example source code file (AppClientContainerAgent.java)

This example Glassfish source code file (AppClientContainerAgent.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

appclientcontaineragent, appclientcontaineragent, exception, exception, instrumentation, instrumentation, log, logger, logging, usererror, usererror

The Glassfish AppClientContainerAgent.java source code

/*
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 *
 * 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.
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 * file and include the License file at packager/legal/LICENSE.txt.
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 */

package org.glassfish.appclient.client.acc.agent;

import java.lang.instrument.Instrumentation;
import java.util.logging.Logger;
import org.glassfish.appclient.client.AppClientFacade;
import org.glassfish.appclient.client.acc.UserError;

/**
 * Agent which prepares the ACC before the VM launches the selected main program.
 * <p>
 * This agent gathers processes agent arguments, supplied either by the
 * appclient script or the end-user (when entering a java command directly),
 * and processes those arguments.  The primary purpose is to:
 * <ol>
 * <li>identify the main class that the Java launcher has decided to start,
 * <li>create and initialize a new app client container instance, asking the
 * ACC to load and inject the indicated main class in the process <b>if and only if
 * the main class is not the AppClientCommand class.
 * </ol>
 * Then the agent is done.  The java launcher and the VM see to it that the main class's
 * main method is invoked.
 *
 * @author tjquinn
 */
public class AppClientContainerAgent {

    private static Logger logger = Logger.getLogger(AppClientContainerAgent.class.getName());

    public static void premain(String agentArgsText, Instrumentation inst) {
        try {
            final long now = System.currentTimeMillis();

            /*
             * The agent prepares the ACC but does not launch the client.
             */
            AppClientFacade.prepareACC(agentArgsText,inst);
    
            logger.fine("AppClientContainerAgent finished after " + (System.currentTimeMillis() - now) + " ms");

        } catch (UserError ue) {
            ue.displayAndExit();
        } catch (Exception e) {
            e.printStackTrace();
            System.exit(1);
        }

    }
}