Java example source code file (ForceLogSnapshot.java)

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Java - Java tags/keywords

activateme, activationdesc, activationgroupdesc, activationid, exception, forcelogsnapshot, how_many, marshalledobject, num_groups, object, properties, remoteexception, rmi, snapshot_interval, string, util

The ForceLogSnapshot.java Java example source code

/*
 * Copyright (c) 1998, 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 4173960
 * @summary synopsis: Activatable objects cannot be restarted.
 * @author Laird Dornin
 *
 * @library ../../../testlibrary
 * @build TestLibrary RMID ActivationLibrary
 *     ActivateMe ForceLogSnapshot_Stub
 * @run main/othervm/policy=security.policy/timeout=640 ForceLogSnapshot
 */

import java.io.*;
import java.rmi.*;
import java.rmi.activation.*;
import java.rmi.server.*;
import java.rmi.registry.*;
import java.util.*;

public class ForceLogSnapshot
        implements ActivateMe
{
    /** how many activatable remote objects to create to test rmid */
    final public static int HOW_MANY = 50;
    final public static int NUM_GROUPS = 4;
    /** cause RMID to generate a snapshot every 10th activated object */
    final public static int SNAPSHOT_INTERVAL = 10;

    private ActivationID id;
    private Vector responders = new Vector();

    private static final String RESTARTABLE = "restartable";
    private static final String ACTIVATABLE = "activatable";

    private static Object lock = new Object();
    private static boolean[] restartedObjects = new boolean[HOW_MANY];
    private static boolean[] activatedObjects = new boolean[HOW_MANY];

    public ForceLogSnapshot(ActivationID id, MarshalledObject mobj)
        throws ActivationException, RemoteException
    {
        this.id = id;
        int intId = 0;

        Activatable.exportObject(this, id, 0);
        ActivateMe obj;
        String responder;
        try {
            Object[] stuff = (Object[]) mobj.get();

            intId = ((Integer) stuff[0]).intValue();
            responder = (String) stuff[1];
            obj = (ActivateMe) stuff[2];

            System.err.println(responder + " service started");
        } catch (Exception e) {
            System.err.println("unable to obtain stub from marshalled object");
            System.err.println(e.getMessage());
            e.printStackTrace();
            return;
        }

        obj.ping(intId, responder);
    }

    public ForceLogSnapshot() throws RemoteException {
        UnicastRemoteObject.exportObject(this, 0);
    }

    public void ping(int intId, String responder) {
        System.err.println("ForceLogSnapshot: received ping from " +
                           responder);
        if (responder.equals(RESTARTABLE)) {
            synchronized (lock) {
                restartedObjects[intId] = true;
            }
        } else if (responder.equals(ACTIVATABLE)) {
            synchronized (lock) {
                activatedObjects[intId] = true;
            }
        }
    }

    public void crash() {
        System.exit(0);
    }

    public ActivationID getID() {
        return id;
    }

    public static void main(String[] args) {

        System.out.println("\nRegression test for bug 4173960\n");

        TestLibrary.suggestSecurityManager("java.rmi.RMISecurityManager");

        RMID rmid = null;
        ForceLogSnapshot[] unicastObjs = new ForceLogSnapshot[HOW_MANY];

        try {
            String option = " -Dsun.rmi.activation.snapshotInterval=" +
                SNAPSHOT_INTERVAL;

            RMID.removeLog();
            rmid = RMID.createRMID();
            rmid.addOptions(new String[] {option, "-Djava.compiler="});
            rmid.start();

            /* Cause activation groups to have a security policy that will
             * allow security managers to be downloaded and installed
             */
            Properties p = new Properties();
            // this test must always set policies/managers in its
            // activation groups
            p.put("java.security.policy",
                  TestParams.defaultGroupPolicy);
            p.put("java.security.manager",
                  TestParams.defaultSecurityManager);

            Object[][] stuff = new Object[HOW_MANY][];
            MarshalledObject restartMobj = null;
            ActivationGroupDesc groupDesc = null;
            MarshalledObject activateMobj = null;
            ActivationGroupID[] groupIDs = new ActivationGroupID[NUM_GROUPS];
            ActivationDesc restartableDesc = null;
            ActivationDesc activatableDesc = null;
            ActivateMe[] restartableObj = new ActivateMe[HOW_MANY];
            ActivateMe[] activatableObj = new ActivateMe[HOW_MANY];

            /*
             * Create unicast object to be contacted when service is activated.
             */
            int group = 0;
            int groupNo = 0;
            for (int i = 0 ; i < HOW_MANY ; i ++ ) {

                System.err.println("Creating descriptors and remote objects");

                unicastObjs[i] = new ForceLogSnapshot();

                /*
                 * Create and register descriptors for a restartable and
                 * non-restartable service (respectively) in a group other than
                 * this VM's group.
                 */
                stuff[i] = new Object[] { new Integer(i),
                                              RESTARTABLE, unicastObjs[i] };
                restartMobj = new MarshalledObject(stuff[i]);

                stuff[i][1] = ACTIVATABLE;
                activateMobj = new MarshalledObject(stuff[i]);

                groupDesc =
                    new ActivationGroupDesc(p, null);

                if (i < NUM_GROUPS) {
                    groupNo = i;
                    groupIDs[groupNo] =
                        ActivationGroup.getSystem().
                        registerGroup(groupDesc);
                } else {
                    groupNo = (group++)%NUM_GROUPS;
                }

                System.err.println("Objects group number: " + groupNo);

                restartableDesc =
                    new ActivationDesc(groupIDs[groupNo], "ForceLogSnapshot", null,
                                       restartMobj, true);

                activatableDesc =
                    new ActivationDesc(groupIDs[groupNo], "ForceLogSnapshot", null,
                                       activateMobj, false);

                System.err.println("Registering descriptors");
                restartableObj[i] =
                    (ActivateMe) Activatable.register(restartableDesc);

                activatableObj[i] =
                    (ActivateMe) Activatable.register(activatableDesc);
                System.err.println("registered activatable #: " + i);

                // start reusing groups if we need to do so.
            }

            int repeatOnce = 1;
            do {

                /*
                 * Restart rmid; it should start up the restartable service
                 */
                rmid.restart();

                if (howManyRestarted(restartedObjects, 10) < HOW_MANY) {
                        TestLibrary.bomb("Test1 failed: a service would not " +
                                         "restart");
                }
                System.err.println("Test1 passed: rmid " +
                                   "all service(s) restarted. Performing next test.");

                /*
                 * Make sure no activatable services were automatically
                 * restarted.
                 */
                if (howManyRestarted(activatedObjects, 2) != 0) {
                    TestLibrary.bomb("Test2 failed: activatable service restarted!",
                                     null);
                }
                System.err.println("Test2 passed: rmid did not " +
                                   "restart activatable service(s)");

                if (repeatOnce > 0) {
                    try {
                        System.err.println("\nCrash restartable object");
                        for (int i = 0 ; i < HOW_MANY ; i ++) {
                            restartableObj[i].crash();
                        }
                    } catch (Exception e) {
                    }
                }

            } while (repeatOnce-- > 0);


        } catch (Exception e) {
            TestLibrary.bomb("test failed", e);
        } finally {
            ActivationLibrary.rmidCleanup(rmid);
            for (int i = 0 ; i < HOW_MANY ; i ++) {
                TestLibrary.unexport(unicastObjs[i]);
            }
        }
    }

    /**
     * Check to see how many services have been automatically
     * restarted.
     */
    private static int howManyRestarted(boolean[] startedObjects, int retries) {
        int succeeded = 0;
        int restarted = 0;
        int atry = 0;

        while ((restarted < HOW_MANY) && (atry < retries)) {
            restarted = 0;
            for (int j = 0 ; j < HOW_MANY ; j ++ ) {
                synchronized(lock) {
                    if (startedObjects[j]) {
                        restarted ++;
                    }
                }
            }
            System.err.println("not all objects restarted, retrying...");
            try {
                Thread.sleep(10000);
            } catch (InterruptedException ie) {
            }
            atry ++;
        }
        return restarted;
    }
}