content: /**
   * Copyright 2010 the original author or authors.
   *
   * 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.github.zkclient;
  
  import java.util.concurrent.locks.Condition;
  import java.util.concurrent.locks.ReentrantLock;
  
  public class ZkLock extends ReentrantLock {
  
      private static final long serialVersionUID = 1L;
  
      private final Condition _dataChangedCondition = newCondition();
      private final Condition _stateChangedCondition = newCondition();
      private final Condition _zNodeEventCondition = newCondition();
  
      /**
       * This condition will be signaled if a zookeeper event was processed and the event contains a data/child change.
       *
       * @return the condition.
       */
      public Condition getDataChangedCondition() {
          return _dataChangedCondition;
      }
  
      /**
       * This condition will be signaled if a zookeeper event was processed and the event contains a state change
       * (connected, disconnected, session expired, etc ...).
       *
       * @return the condition.
       */
      public Condition getStateChangedCondition() {
          return _stateChangedCondition;
      }
  
      /**
       * This condition will be signaled if any znode related zookeeper event was received.
       *
       * @return the condition.
       */
      public Condition getZNodeEventCondition() {
          return _zNodeEventCondition;
      }
  }