/*

  * Copyright 2006-2011 The Kuali Foundation

  *

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php

  *

  * 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 org.kuali.rice.core.api.config.property;

 import org.apache.log4j.Logger;

 /**

  * Synchronization primitive that implements a condition that can be waited upon.

  *

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class ContextualConfigLock {

     private static final Logger LOG = Logger.getLogger(ContextualConfigLock.class);

     private String name;

     private boolean fired;

     private Object lock = new Object();

     public ContextualConfigLock() {

         this(null);

     }

     public ContextualConfigLock(String name) {

         if (name == null) {

             this.name = "<<anonymous>>";

         } else {

             this.name = name;

         }

     }

     public void await() {

         synchronized (this.lock) {

             while (!this.fired) {

                 try {

                     this.lock.wait();

                 } catch (InterruptedException ie) {

                     LOG.warn("Interrupted while waiting for condition: " + this.name, ie);

                 }

             }

         }

     }

     public boolean hasFired() {

         synchronized (this.lock) {

             return this.fired;

         }

     }

     public void fire() {

         synchronized (this.lock) {

             if (this.fired) return;

             this.fired = true;

             this.lock.notifyAll();

         }

     }

     public void reset() {

         synchronized (this.lock) {

             this.fired = false;

         }

     }

     public String toString() {

         return "[Condition: name=" + this.name + "]";

     }

 }