1 /* 2 * Copyright (c) 1997, 2002, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.rmi.server; 27 28 import java.rmi.activation.ActivationGroupDesc; 29 import java.rmi.activation.ActivationGroupID; 30 import java.rmi.activation.ActivationGroup; 31 32 /** 33 * This is the bootstrap code to start a VM executing an activation 34 * group. 35 * 36 * The activator spawns (as a child process) an activation group as needed 37 * and directs activation requests to the appropriate activation 38 * group. After spawning the VM, the activator passes some 39 * information to the bootstrap code via its stdin: 40 * <ul> 41 * <li> the activation group's id, 42 * <li> the activation group's descriptor (an instance of the class 43 * java.rmi.activation.ActivationGroupDesc) for the group, adn 44 * <li> the group's incarnation number. 45 * </ul><p> 46 * 47 * When the bootstrap VM starts executing, it reads group id and 48 * descriptor from its stdin so that it can create the activation 49 * group for the VM. 50 * 51 * @author Ann Wollrath 52 */ 53 public abstract class ActivationGroupInit 54 { 55 /** 56 * Main program to start a VM for an activation group. 57 */ 58 public static void main(String args[]) 59 { 60 try { 61 if (System.getSecurityManager() == null) { 62 System.setSecurityManager(new SecurityManager()); 63 } 64 // read group id, descriptor, and incarnation number from stdin 65 MarshalInputStream in = new MarshalInputStream(System.in); 66 ActivationGroupID id = (ActivationGroupID)in.readObject(); 67 ActivationGroupDesc desc = (ActivationGroupDesc)in.readObject(); 68 long incarnation = in.readLong(); 69 70 // create and set group for the VM 71 ActivationGroup.createGroup(id, desc, incarnation); 72 } catch (Exception e) { 73 System.err.println("Exception in starting ActivationGroupInit:"); 74 e.printStackTrace(); 75 } finally { 76 try { 77 System.in.close(); 78 // note: system out/err shouldn't be closed 79 // since the parent may want to read them. 80 } catch (Exception ex) { 81 // ignore exceptions 82 } 83 } 84 } 85 }