1 /*
   2  * Copyright (c) 2015, 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 import java.io.File;
  24 import java.io.PrintStream;
  25 import java.util.Arrays;
  26 
  27 public class Agent {
  28     public static void main(String[] args) throws Exception {
  29         String jarName = args[0];
  30         String className = args[1];
  31         String manifestName = "manifest.mf";
  32 
  33         System.out.println("Creating "+manifestName);
  34         try (PrintStream out = new PrintStream(new File(manifestName))) {
  35             out.println("Premain-Class: " + className);
  36             out.println("Can-Redefine-Classes: true");
  37         }
  38         System.out.println("Building "+jarName);
  39         String[] jarArgs = new String[] {"-cfm", jarName, manifestName };
  40 
  41         System.out.println("Running jar " + Arrays.toString(jarArgs));
  42         sun.tools.jar.Main jarTool = new sun.tools.jar.Main(System.out, System.err, "jar");
  43         if (!jarTool.run(jarArgs)) {
  44             throw new Error("jar failed: args=" + Arrays.toString(args));
  45         }
  46     }
  47 }