Java example source code file (CheckImplClassLoader.java)

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

Learn more about this Java project at its project page.

Java - Java tags/keywords

activatableimpl, activatableimpl_stub, activationdesc, activationgroupdesc, activationgroupid, activationsystem, checkimplclassloader, interruptedexception, myrmi, net, network, object, rmi, rmid, url

The CheckImplClassLoader.java Java example source code

/*
 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/* @test
 * @bug 4289544
 * @summary ActivationGroupImpl.newInstance does not set context classloader for impl
 * @author Laird Dornin; code borrowed from Ann Wollrath
 *
 * @library ../../../testlibrary
 * @build TestLibrary RMID
 *     MyRMI ActivatableImpl ActivatableImpl ActivatableImpl_Stub
 * @run main/othervm/policy=security.policy/timeout=150 CheckImplClassLoader
 */

import java.io.*;
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.activation.*;
import java.net.URL;

/**
 * sun.rmi.server.ActivationGroupImpl.newInstance() needs to set the
 * context class loader when it constructs the implementation class of
 * an Activatable object.  It needs to set the ccl to be the class
 * loader of the implementation class.
 *
 * Test creates an Activatable object whose impl is loaded outside of
 * CLASSPATH.  The impls constructor checks to make sure that the
 * correct context class loader has been set when the constructor is
 * invoked.
 */
public class CheckImplClassLoader {

    private static Object dummy = new Object();
    private static MyRMI myRMI = null;
    private static ActivationGroup group = null;

    public static void main(String args[]) {
        /*
         * The following line is required with the JDK 1.2 VM because
         * of gc hocus pocus that may no longer be needed with an
         * exact vm (hotspot).
         */
        Object dummy1 = new Object();
        RMID rmid = null;

        System.err.println("\nRegression test for bug/rfe 4289544\n");

        try {

            URL implcb = TestLibrary.installClassInCodebase("ActivatableImpl",
                                                            "implcb");
            TestLibrary.installClassInCodebase("ActivatableImpl_Stub",
                                               "implcb");
            TestLibrary.suggestSecurityManager(
                TestParams.defaultSecurityManager);

            RMID.removeLog();
            rmid = RMID.createRMID();
            rmid.start();

            System.err.println("Create activation group in this VM");
            ActivationGroupDesc groupDesc =
                new ActivationGroupDesc(null, null);
            ActivationSystem system = ActivationGroup.getSystem();
            ActivationGroupID groupID = system.registerGroup(groupDesc);
            group = ActivationGroup.createGroup(groupID, groupDesc, 0);

            ActivationDesc desc = new ActivationDesc("ActivatableImpl",
                                                     implcb.toString(), null);
            myRMI = (MyRMI) Activatable.register(desc);

            System.err.println("Checking that impl has correct " +
                               "context class loader");
            if (!myRMI.classLoaderOk()) {
                TestLibrary.bomb("incorrect context class loader for " +
                                 "activation constructor");
            }

            System.err.println("Deactivate object via method call");
            myRMI.shutdown();

            System.err.println("\nsuccess: CheckImplClassLoader test passed ");

        } catch (Exception e) {
            TestLibrary.bomb("\nfailure: unexpected exception ", e);
        } finally {
            try {
                Thread.sleep(4000);
            } catch (InterruptedException e) {
            }

            myRMI = null;
            System.err.println("rmid shut down");
            ActivationLibrary.rmidCleanup(rmid);
            TestLibrary.unexport(group);
        }
    }
}