Queue


1   /*
2    * $Id: Queue.java 3167 2006-09-22 15:47:04Z holger $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSource, Inc.  All rights reserved.  http://www.mulesource.com
5    *
6    * The software in this package is published under the terms of the MuleSource MPL
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.util.queue;
12  
13  /**
14   * <code>Queue</code> TODO
15   * 
16   * @author <a HREF="mailto:gnt@codehaus.org">Guillaume Nodet</a>
17   * @version $Revision: 3167 $
18   */
19  public interface Queue
20  {
21  
22      /**
23       * Returns the number of elements in this queue.
24       * 
25       * @return
26       */
27      int size();
28  
29      /**
30       * Puts a new object in this queue and wait if necessary.
31       * 
32       * @param o the object to put
33       */
34      void put(Object   o) throws InterruptedException  ;
35  
36      /**
37       * Blocks and retrieves an object from this queue.
38       * 
39       * @return an object.
40       */
41      Object   take() throws InterruptedException  ;
42  
43      Object   peek() throws InterruptedException  ;
44  
45      Object   poll(long timeout) throws InterruptedException  ;
46  
47      boolean offer(Object   o, long timeout) throws InterruptedException  ;
48  
49  }
50

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