Java example source code file (AltSecurityManager.java)

This example Java source code file (AltSecurityManager.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

activation, altsecuritymanager, exception, javavm, port, registry_impl, runnable, string, thread, time_out, utility

The AltSecurityManager.java Java example source code

/*
 * Copyright (c) 1999, 2013, 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 4183202
 * @summary rmid and rmiregistry could allow alternate security manager
 * @author Laird Dornin
 *
 * @library ../../testlibrary
 * @build TestLibrary JavaVM RMID TestSecurityManager
 * @run main/othervm AltSecurityManager
 */

/**
 * Ensure that a user is able to specify alternate security managers to
 * be used in rmiregistry and rmid.  Test specifies a security manager
 * that throws a runtime exception in its checkListen method, this
 * will cause rmiregistry and rmid to exit early because those
 * utilities will be unable to export any remote objects; test fails
 * if registry and rmid take too long to exit.
 */
public class AltSecurityManager implements Runnable {
    private final int regPort;
    // variable to hold registry and rmid children
    static JavaVM vm = null;

    // names of utilities
    static String utilityToStart = null;
    static final String REGISTRY_IMPL = "sun.rmi.registry.RegistryImpl";
    static final String ACTIVATION = "sun.rmi.server.Activation";

    // children should exit in at least this time.
    static long TIME_OUT = 15000;

    public AltSecurityManager(int port) {
        if (port <= 0) {
            TestLibrary.bomb("Port must be greater then 0.");
        }

        this.regPort = port;
    }

    public void run() {
        try {
            if (utilityToStart.equals(REGISTRY_IMPL)) {
                vm = new JavaVM(utilityToStart,
                        " -Djava.security.manager=TestSecurityManager",
                        Integer.toString(regPort));
            } else if (utilityToStart.contains(ACTIVATION)) {
                vm = new JavaVM(utilityToStart,
                        " -Djava.security.manager=TestSecurityManager",
                        "-port " + Integer.toString(regPort));
            } else {
                TestLibrary.bomb("Utility to start must be " + REGISTRY_IMPL +
                        " or " + ACTIVATION);
            }

            System.err.println("starting " + utilityToStart);
            vm.execute();

        } catch (Exception e) {
            TestLibrary.bomb(e);
        }
    }

    /**
     * Wait to make sure that the registry and rmid exit after
     * their security manager is set.
     */
    public static void ensureExit(String utility) throws Exception {
        utilityToStart = utility;

        try {
            int port = TestLibrary.getUnusedRandomPort();
            Thread thread = new Thread(new AltSecurityManager(port));
            System.err.println("expecting RuntimeException for " +
                               "checkListen in child process");
            long start = System.currentTimeMillis();
            thread.start();
            thread.join(TIME_OUT);

            long time = System.currentTimeMillis() - start;
            System.err.println("waited " + time + " millis for " +
                               utilityToStart + " to die");

            if (time >= TIME_OUT) {

                // dont pollute other tests; increase the likelihood
                // that rmid will go away if it did not exit already.
                if (utility.equals(ACTIVATION)) {
                    RMID.shutdown(port);
                }

                TestLibrary.bomb(utilityToStart +
                                 " took too long to die...");
            } else {
                System.err.println(utilityToStart +
                                   " terminated on time");
            }
        } finally {
            vm.destroy();
            vm = null;
        }
    }

    public static void main(String[] args) {
        try {
            System.err.println("\nRegression test for bug 4183202\n");

            // make sure the registry exits early.
            ensureExit(REGISTRY_IMPL);

            // make sure rmid exits early
            ensureExit(ACTIVATION);

            System.err.println("test passed");

        } catch (Exception e) {
            TestLibrary.bomb(e);
        } finally {
            RMID.removeLog();
        }
    }
}