1 /*

     2  * Copyright (c) 2013, 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 import java.io.*;

    25 import java.lang.instrument.*;

    26 

    27 public class RedefineSubclassWithTwoInterfacesApp {

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

    29         System.out.println("Hello from RedefineSubclassWithTwoInterfacesApp!");

    30 

    31         new RedefineSubclassWithTwoInterfacesApp().doTest();

    32 

    33         System.exit(0);

    34     }

    35 

    36     private void doTest() throws Exception {

    37         RedefineSubclassWithTwoInterfacesImpl impl

    38             = new RedefineSubclassWithTwoInterfacesImpl();

    39         RedefineSubclassWithTwoInterfacesRemote remote

    40             = new RedefineSubclassWithTwoInterfacesRemote(impl, impl);

    41         String mesg;

    42 

    43         // make echo() calls before any redefinitions:

    44         mesg = remote.echo1("test message #1.1");

    45         System.out.println("RedefineSubclassWithTwoInterfacesApp: echo1 mesg='"

    46             + mesg + "' before any redefines");

    47         mesg = remote.echo2("test message #2.1");

    48         System.out.println("RedefineSubclassWithTwoInterfacesApp: echo2 mesg='"

    49             + mesg + "' before any redefines");

    50 

    51 

    52         // redefining RedefineSubclassWithTwoInterfacesImpl before

    53         // RedefineSubclassWithTwoInterfacesTarget fails:

    54         do_redefine("RedefineSubclassWithTwoInterfacesImpl", 1);

    55         do_redefine("RedefineSubclassWithTwoInterfacesTarget", 1);

    56 

    57         mesg = remote.echo1("test message #1.2");

    58         System.out.println("RedefineSubclassWithTwoInterfacesApp: echo1 mesg='"

    59             + mesg + "' after redefine");

    60         mesg = remote.echo2("test message #2.2");

    61         System.out.println("RedefineSubclassWithTwoInterfacesApp: echo2 mesg='"

    62             + mesg + "' after redefine");

    63     }

    64 

    65     private static void do_redefine(String className, int counter)

    66             throws Exception {

    67         File f = new File(className + "_" + counter + ".class");

    68         System.out.println("Reading test class from " + f);

    69         InputStream redefineStream = new FileInputStream(f);

    70 

    71         byte[] redefineBuffer

    72             = NamedBuffer.loadBufferFromStream(redefineStream);

    73 

    74         ClassDefinition redefineParamBlock = new ClassDefinition(

    75             Class.forName(className), redefineBuffer);

    76 

    77         RedefineSubclassWithTwoInterfacesAgent.getInstrumentation().

    78             redefineClasses(new ClassDefinition[] {redefineParamBlock});

    79     }

    80 }