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  * Used to shutdown SimpleApplication (or a subclass). The argument to

    26  * this class is the name of a file that contains the TCP port number

    27  * on which SimpleApplication (or a subclass) is listening.

    28  *

    29  * Note: When this program returns, the SimpleApplication (or a subclass)

    30  * may still be running because the application has not yet reached the

    31  * shutdown check.

    32  */

    33 import java.net.Socket;

    34 import java.net.InetSocketAddress;

    35 import java.io.File;

    36 import java.io.FileInputStream;

    37 

    38 public class ShutdownSimpleApplication {

    39     public static void main(String args[]) throws Exception {

    40 

    41         if (args.length != 1) {

    42             throw new RuntimeException("Usage: ShutdownSimpleApplication" +

    43                 " port-file");

    44         }

    45 

    46         // read the (TCP) port number from the given file

    47 

    48         File f = new File(args[0]);

    49         FileInputStream fis = new FileInputStream(f);

    50         byte b[] = new byte[8];

    51         int n = fis.read(b);

    52         if (n < 1) {

    53             throw new RuntimeException("Empty port-file");

    54         }

    55         fis.close();

    56 

    57         String str = new String(b, 0, n, "UTF-8");

    58         System.out.println("INFO: Port number of SimpleApplication: " + str);

    59         int port = Integer.parseInt(str);

    60 

    61         // Now connect to the port (which will shutdown application)

    62 

    63         System.out.println("INFO: Connecting to port " + port +

    64             " to shutdown SimpleApplication ...");

    65         System.out.flush();

    66 

    67         Socket s = new Socket();

    68         s.connect( new InetSocketAddress(port) );

    69         s.close();

    70 

    71         System.out.println("INFO: done connecting to SimpleApplication.");

    72         System.out.flush();

    73 

    74         System.exit(0);

    75     }

    76 }