/*

 * Copyright (c) 1997, 2002, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 */

package sun.rmi.server;

import java.rmi.activation.ActivationGroupDesc;

import java.rmi.activation.ActivationGroupID;

import java.rmi.activation.ActivationGroup;

/**

 * This is the bootstrap code to start a VM executing an activation

 * group.

 *

 * The activator spawns (as a child process) an activation group as needed

 * and directs activation requests to the appropriate activation

 * group. After spawning the VM, the activator passes some

 * information to the bootstrap code via its stdin: <p>

 * <ul>

 * <li> the activation group's id,

 * <li> the activation group's descriptor (an instance of the class

 *    java.rmi.activation.ActivationGroupDesc) for the group, adn

 * <li> the group's incarnation number.

 * </ul><p>

 *

 * When the bootstrap VM starts executing, it reads group id and

 * descriptor from its stdin so that it can create the activation

 * group for the VM.

 *

 * @author Ann Wollrath

 */

public abstract class ActivationGroupInit

{

    /**

     * Main program to start a VM for an activation group.

     */

    public static void main(String args[])

    {

        try {

            if (System.getSecurityManager() == null) {

                System.setSecurityManager(new SecurityManager());

            }

            // read group id, descriptor, and incarnation number from stdin

            MarshalInputStream in = new MarshalInputStream(System.in);

            ActivationGroupID id  = (ActivationGroupID)in.readObject();

            ActivationGroupDesc desc = (ActivationGroupDesc)in.readObject();

            long incarnation = in.readLong();

            // create and set group for the VM

            ActivationGroup.createGroup(id, desc, incarnation);

        } catch (Exception e) {

            System.err.println("Exception in starting ActivationGroupInit:");

            e.printStackTrace();

        } finally {

            try {

                System.in.close();

                // note: system out/err shouldn't be closed

                // since the parent may want to read them.

            } catch (Exception ex) {

                // ignore exceptions

            }

        }

    }

}