1 /*
   2  * Copyright (c) 2005, 2010, 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  *
  26  *
  27  * Used to shutdown SimpleApplication (or a subclass). The argument to
  28  * this class is the name of a file that contains the TCP port number
  29  * on which SimpleApplication (or a subclass) is listening.
  30  *
  31  * Note: When this program returns, the SimpleApplication (or a subclass)
  32  * may still be running because the application has not yet reached the
  33  * shutdown check.
  34  */
  35 import java.net.Socket;
  36 import java.net.InetSocketAddress;
  37 import java.io.File;
  38 import java.io.FileInputStream;
  39 
  40 public class ShutdownSimpleApplication {
  41     public static void main(String args[]) throws Exception {
  42 
  43         if (args.length != 1) {
  44             throw new RuntimeException("Usage: ShutdownSimpleApplication" +
  45                 " port-file");
  46         }
  47 
  48         // read the (TCP) port number from the given file
  49 
  50         File f = new File(args[0]);
  51         FileInputStream fis = new FileInputStream(f);
  52         byte b[] = new byte[8];
  53         int n = fis.read(b);
  54         if (n < 1) {
  55             throw new RuntimeException("Empty port-file");
  56         }
  57         fis.close();
  58 
  59         String str = new String(b, 0, n, "UTF-8");
  60         System.out.println("INFO: Port number of SimpleApplication: " + str);
  61         int port = Integer.parseInt(str);
  62 
  63         // Now connect to the port (which will shutdown application)
  64 
  65         System.out.println("INFO: Connecting to port " + port +
  66             " to shutdown SimpleApplication ...");
  67         System.out.flush();
  68 
  69         Socket s = new Socket();
  70         s.connect( new InetSocketAddress(port) );
  71         s.close();
  72 
  73         System.out.println("INFO: done connecting to SimpleApplication.");
  74         System.out.flush();
  75 
  76         System.exit(0);
  77     }
  78 }
--- EOF ---