| /* |
| * Copyright (c) 2003, 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. |
| */ |
| |
| /* |
| * |
| * |
| * A Launcher to launch a java process with its standard input, output, |
| * and error streams connected to a socket. |
| */ |
| import java.net.*; |
| import java.nio.channels.*; |
| import java.io.IOException; |
| |
| public class Launcher { |
| |
| static { |
| System.loadLibrary("Launcher"); |
| } |
| |
| private static native void launch0(String cmdarray[], int fd) throws IOException; |
| |
| private static void launch(String className, String options[], String args[], int fd) throws IOException { |
| String[] javacmd = Util.javaCommand(); |
| int options_len = (options == null) ? 0 : options.length; |
| int args_len = (args == null) ? 0 : args.length; |
| |
| // java [-options] class [args...] |
| int len = javacmd.length + options_len + 1 + args_len; |
| |
| String cmdarray[] = new String[len]; |
| int pos = 0; |
| for (int i=0; i<javacmd.length; i++) { |
| cmdarray[pos++] = javacmd[i]; |
| } |
| for (int i=0; i<options_len; i++) { |
| cmdarray[pos++] = options[i]; |
| } |
| cmdarray[pos++] = className; |
| for (int i=0; i<args_len; i++) { |
| cmdarray[pos++] = args[i]; |
| } |
| launch0(cmdarray, fd); |
| } |
| |
| /* |
| * Launch 'java' with specified class with the specified arguments (may be null). |
| * The launched process will inherit a connected TCP socket. The remote endpoint |
| * will be the SocketChannel returned by this method. |
| */ |
| public static SocketChannel launchWithSocketChannel(String className, String options[], String args[]) throws IOException { |
| ServerSocketChannel ssc = ServerSocketChannel.open(); |
| ssc.socket().bind(new InetSocketAddress(0)); |
| InetSocketAddress isa = new InetSocketAddress(InetAddress.getLocalHost(), |
| ssc.socket().getLocalPort()); |
| SocketChannel sc1 = SocketChannel.open(isa); |
| SocketChannel sc2 = ssc.accept(); |
| launch(className, options, args, Util.getFD(sc2)); |
| sc2.close(); |
| ssc.close(); |
| return sc1; |
| } |
| |
| public static SocketChannel launchWithSocketChannel(String className, String args[]) throws IOException { |
| return launchWithSocketChannel(className, null, args); |
| } |
| |
| public static SocketChannel launchWithSocketChannel(String className) throws IOException { |
| return launchWithSocketChannel(className, null); |
| } |
| |
| /* |
| * Launch 'java' with specified class with the specified arguments (may be null). |
| * The launched process will inherited a TCP listener socket. |
| * Once launched this method tries to connect to service. If a connection |
| * can be established a SocketChannel, connected to the service, is returned. |
| */ |
| public static SocketChannel launchWithServerSocketChannel(String className, String options[], String args[]) |
| throws IOException |
| { |
| ServerSocketChannel ssc = ServerSocketChannel.open(); |
| ssc.socket().bind(new InetSocketAddress(0)); |
| int port = ssc.socket().getLocalPort(); |
| launch(className, options, args, Util.getFD(ssc)); |
| ssc.close(); |
| InetSocketAddress isa = new InetSocketAddress(InetAddress.getLocalHost(), port); |
| return SocketChannel.open(isa); |
| } |
| |
| public static SocketChannel launchWithServerSocketChannel(String className, String args[]) throws IOException { |
| return launchWithServerSocketChannel(className, null, args); |
| } |
| |
| public static SocketChannel launchWithServerSocketChannel(String className) throws IOException { |
| return launchWithServerSocketChannel(className, null); |
| } |
| |
| /* |
| * Launch 'java' with specified class with the specified arguments (may be null). |
| * The launch process will inherited a bound UDP socket. |
| * Once launched this method creates a DatagramChannel and "connects |
| * it to the service. The created DatagramChannel is then returned. |
| * As it is connected any packets sent from the socket will be |
| * sent to the service. |
| */ |
| public static DatagramChannel launchWithDatagramChannel(String className, String options[], String args[]) |
| throws IOException |
| { |
| DatagramChannel dc = DatagramChannel.open(); |
| dc.socket().bind(new InetSocketAddress(0)); |
| |
| int port = dc.socket().getLocalPort(); |
| launch(className, options, args, Util.getFD(dc)); |
| dc.close(); |
| |
| dc = DatagramChannel.open(); |
| |
| InetSocketAddress isa = new InetSocketAddress(InetAddress.getLocalHost(), port); |
| |
| dc.connect(isa); |
| return dc; |
| } |
| |
| public static DatagramChannel launchWithDatagramChannel(String className, String args[]) throws IOException { |
| return launchWithDatagramChannel(className, null, args); |
| } |
| |
| public static DatagramChannel launchWithDatagramChannel(String className) throws IOException { |
| return launchWithDatagramChannel(className, null); |
| } |
| } |