001    /*
002     * The MIT License
003     * Copyright (c) 2012 Microsoft Corporation
004     *
005     * Permission is hereby granted, free of charge, to any person obtaining a copy
006     * of this software and associated documentation files (the "Software"), to deal
007     * in the Software without restriction, including without limitation the rights
008     * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
009     * copies of the Software, and to permit persons to whom the Software is
010     * furnished to do so, subject to the following conditions:
011     *
012     * The above copyright notice and this permission notice shall be included in
013     * all copies or substantial portions of the Software.
014     *
015     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
016     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
017     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
018     * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
019     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
020     * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
021     * THE SOFTWARE.
022     */
023    
024    package microsoft.exchange.webservices.data.misc;
025    
026    import org.apache.commons.logging.Log;
027    import org.apache.commons.logging.LogFactory;
028    
029    import java.util.concurrent.Future;
030    
031    public abstract class AbstractAsyncCallback implements Runnable, Callback<Object> {
032    
033      private static final Log LOG = LogFactory.getLog(AbstractAsyncCallback.class);
034    
035      Future<?> task;
036      static boolean callbackProcessed = false;
037    
038      AbstractAsyncCallback() {
039      }
040    
041      AbstractAsyncCallback(Future<?> t) {
042        this.task = t;
043      }
044    
045      public void run() {
046        while (!callbackProcessed) {
047    
048          if (task.isDone()) {
049            processMe(task);
050            callbackProcessed = true;
051            try {
052              Thread.sleep(1000);
053            } catch (InterruptedException e) {
054              // TODO Auto-generated catch block
055              LOG.error(e);
056            }
057            break;
058          }
059    
060        }
061      }
062    }