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 }