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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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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: 


 the activation group's id,
 the activation group's descriptor (an instance of the class
   java.rmi.activation.ActivationGroupDesc) for the group, adn
 the group's incarnation number.

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/**
 * 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.
/**
     * 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
            }
        }
    }
}