/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.sun.jini.phoenix;
import java.lang.reflect.Method;
import java.rmi.activation.ActivationGroup;
import java.rmi.activation.ActivationGroupDesc;
import java.rmi.activation.ActivationGroupID;
import java.rmi.server.RMIClassLoader;
import java.util.Collections;
import net.jini.io.MarshalInputStream;
/**
* This is the bootstrap code to start a virtual machine (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, and
* <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 Sun Microsystems, Inc.
*
* @since 2.0
*/
class ActivationGroupInit {
private 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());
}
MarshalInputStream in =
new MarshalInputStream(
System.in,
ActivationGroupInit.class.getClassLoader(),
false, null, Collections.EMPTY_LIST);
in.useCodebaseAnnotations();
ActivationGroupID id = (ActivationGroupID)in.readObject();
ActivationGroupDesc desc = (ActivationGroupDesc)in.readObject();
long incarnation = in.readLong();
Class cl = RMIClassLoader.loadClass(desc.getLocation(),
desc.getClassName());
try {
Method create =
cl.getMethod("createGroup",
new Class[]{ActivationGroupID.class,
ActivationGroupDesc.class,
long.class});
create.invoke(null, new Object[]{id, desc,
new Long(incarnation)});
} catch (NoSuchMethodException e) {
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
}
}
}
}