1 /*
   2  * Copyright 2014 SAP AG.  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 public class RecursiveObjectLock {
  25 
  26     public void testMethod() {
  27         synchronized (this) {
  28             nestedLock1();
  29         }
  30     }
  31 
  32     public void nestedLock1() {
  33         synchronized (this) {
  34             nestedLock2();
  35         }
  36     }
  37 
  38     public void nestedLock2() {
  39         synchronized (this) {
  40             callWait();
  41         }
  42     }
  43 
  44     public void callWait(){
  45         try {
  46             this.wait(1);
  47         } catch (InterruptedException e) {
  48             e.printStackTrace();
  49         }
  50         breakpoint1();
  51     }
  52 
  53     public static void breakpoint1() {
  54         // purpose: hold a breakpoint
  55     }
  56 
  57     public static void main(String[] args) {
  58         RecursiveObjectLock ro = new RecursiveObjectLock();
  59         ro.testMethod();
  60         System.out.println("ready");
  61     }
  62 
  63 }