content: /*
   * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.alibaba.otter.shared.arbitrate.zookeeper;
  
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  
  import org.apache.commons.lang.math.RandomUtils;
  import org.apache.zookeeper.KeeperException;
  import org.testng.annotations.BeforeClass;
  import org.testng.annotations.Test;
  
  import com.alibaba.otter.shared.arbitrate.BaseEventTest;
  import com.alibaba.otter.shared.arbitrate.impl.zookeeper.lock.DistributedReentrantLock;
  
  /**
   * @author jianghang 2011-9-29 下午02:36:19
   * @version 4.0.0
   */
  public class DistributedReentrantLockTest extends BaseEventTest {
  
      private final String dir = "/" + getClass().getSimpleName();
  
      @BeforeClass
      public void init() {
          getZookeeper();
      }
  
      @Test
      protected void test_lock() {
          ExecutorService exeucotr = Executors.newCachedThreadPool();
          final int count = 50;
          final CountDownLatch latch = new CountDownLatch(count);
  
          final DistributedReentrantLock lock = new DistributedReentrantLock(dir);
          for (int i = 0; i < count; i++) {
              exeucotr.submit(new Runnable() {
  
                  public void run() {
                      try {
                          Thread.sleep(1000);
                          lock.lock();
                          Thread.sleep(100 + RandomUtils.nextInt(100));
  
                          System.out.println("id: " + lock.getId() + " is leader: " + lock.isOwner());
                      } catch (InterruptedException e) {
                          want.fail();
                      } catch (KeeperException e) {
                          want.fail();
                      } finally {
                          latch.countDown();
                          try {
                              lock.unlock();
                          } catch (KeeperException e) {
                              want.fail();
                          }
                      }
  
                  }
              });
          }
  
          try {
              latch.await();
          } catch (InterruptedException e) {
              want.fail();
          }
  
          exeucotr.shutdown();
      }
  
      @Test
      protected void test_try_lock() {
          ExecutorService exeucotr = Executors.newCachedThreadPool();
          final int count = 50;
          final CountDownLatch latch = new CountDownLatch(count);
  
          final DistributedReentrantLock lock = new DistributedReentrantLock(dir);
          for (int i = 0; i < count; i++) {
              exeucotr.submit(new Runnable() {
  
                  public void run() {
                      try {
                          while (lock.tryLock() == false) {
                              Thread.sleep(100 + RandomUtils.nextInt(100));
                          }
  
                          System.out.println("id: " + lock.getId() + " is leader: " + lock.isOwner());
                      } catch (InterruptedException e) {
                          want.fail();
                      } catch (KeeperException e) {
                          want.fail();
                      } finally {
                          latch.countDown();
                          try {
                              lock.unlock();
                          } catch (KeeperException e) {
                              want.fail();
                          }
                      }
  
                  }
              });
          }
  
          try {
              latch.await();
          } catch (InterruptedException e) {
              want.fail();
          }
  
          exeucotr.shutdown();
      }
  }
  