cvs commit: jakarta-log4j/tests/src/java/org/apache/log4j DeadlockTest.java

[ceki]

ceki        2003/12/19 08:02:13

  Added:       tests/src/java/org/apache/log4j DeadlockTest.java
  Log:
  Added a new test case for Deadlocks. It's not used because it always finds deadlocks.
  
  Revision  Changes    Path
  1.1                  jakarta-log4j/tests/src/java/org/apache/log4j/DeadlockTest.java
  
  Index: DeadlockTest.java
  ===================================================================
  /*
   * ============================================================================
   *                   The Apache Software License, Version 1.1
   * ============================================================================
   *
   *    Copyright (C) 1999 The Apache Software Foundation. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modifica-
   * tion, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of  source code must  retain the above copyright  notice,
   *    this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   *
   * 3. The end-user documentation included with the redistribution, if any, must
   *    include  the following  acknowledgment:  "This product includes  software
   *    developed  by the  Apache Software Foundation  (http://www.apache.org/)."
   *    Alternately, this  acknowledgment may  appear in the software itself,  if
   *    and wherever such third-party acknowledgments normally appear.
   *
   * 4. The names "log4j" and  "Apache Software Foundation"  must not be used to
   *    endorse  or promote  products derived  from this  software without  prior
   *    written permission. For written permission, please contact
   *    [EMAIL PROTECTED]
   *
   * 5. Products  derived from this software may not  be called "Apache", nor may
   *    "Apache" appear  in their name,  without prior written permission  of the
   *    Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS  FOR A PARTICULAR  PURPOSE ARE  DISCLAIMED.  IN NO  EVENT SHALL  THE
   * APACHE SOFTWARE  FOUNDATION  OR ITS CONTRIBUTORS  BE LIABLE FOR  ANY DIRECT,
   * INDIRECT, INCIDENTAL, SPECIAL,  EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLU-
   * DING, BUT NOT LIMITED TO, PROCUREMENT  OF SUBSTITUTE GOODS OR SERVICES; LOSS
   * OF USE, DATA, OR  PROFITS; OR BUSINESS  INTERRUPTION)  HOWEVER CAUSED AND ON
   * ANY  THEORY OF LIABILITY,  WHETHER  IN CONTRACT,  STRICT LIABILITY,  OR TORT
   * (INCLUDING  NEGLIGENCE OR  OTHERWISE) ARISING IN  ANY WAY OUT OF THE  USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * This software  consists of voluntary contributions made  by many individuals
   * on  behalf of the Apache Software  Foundation.  For more  information on the
   * Apache Software Foundation, please see <http://www.apache.org/>.
   *
   */
  
  package org.apache.log4j;
  
  import junit.framework.TestCase;
  
  
  /**
   * Test case for bug http://nagoya.apache.org/bugzilla/show_bug.cgi?id=24159
   *
   * Actually this one is impossible to fix.
   *
   * @author Elias Ross
   * @author Ceki Gulcu
   */
  public class DeadlockTest extends TestCase {
    static long RUNLENGTH = 10000;
    Logger logger = Logger.getLogger("DeadlockTest");
  
    protected void setUp() throws Exception {
      super.setUp();
      System.out.println("in setup");
      BasicConfigurator.configure();
    }
  
    protected void tearDown() throws Exception {
      super.tearDown();
      System.out.println("tear down");
      LogManager.shutdown();
    }
  
    public void testDeadlock() throws InterruptedException {
      System.out.println("in testDeadlock()");
  
      final Deadlock d = new Deadlock();
  
      Thread t1 =
        new Thread() {
          public void run() {
            long start = System.currentTimeMillis();
  
            while ((System.currentTimeMillis() - start) < RUNLENGTH) {
              logger.debug(d);
            }
          }
        };
  
      Thread t2 =
        new Thread() {
          public void run() {
            long start = System.currentTimeMillis();
  
            while ((System.currentTimeMillis() - start) < RUNLENGTH) {
              d.setVar("n");
            }
          }
        };
  
      t1.start();
      t2.start();
      System.out.println("Waiting to join t1.");
      t1.join();
      System.out.println("======================Joined t1=====================");
    }
  }
  
  
  class Deadlock {
    static final Logger log = Logger.getLogger(Deadlock.class);
    String var;
  
    public synchronized void setVar(String var) {
      log.debug(this);
    }
  
    public synchronized String getVar() {
      return var;
    }
  
    public String toString() {
      return "Value x=" + getVar();
    }
  }
  
  
  

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