ByteBufferPool


1   package org.sapia.ubik.net.nio.util;
2   
3   import java.nio.ByteBuffer  ;
4   
5   import org.sapia.ubik.net.Pool;
6   
7   /**
8    * @author Yanick Duchesne
9    *
10   * <dl>
11   * <dt><b>Copyright:</b><dd>Copyright &#169; 2002-2005 <a HREF="http://www.sapia-oss.org">Sapia Open Source Software</a>. All Rights Reserved.</dd></dt>
12   * <dt><b>License:</b><dd>Read the license.txt file of the jar or visit the
13   *        <a HREF="http://www.sapia-oss.org/license.html">license page</a> at the Sapia OSS web site</dd></dt>
14   * </dl>
15   */
16  public class ByteBufferPool extends Pool{
17    
18    /**
19     * Holds the default buffer size (1024).
20     * 
21     * @see #setBufSize(int)
22     */
23    public static final int DEFAULT_BUF_SIZE = 1024;
24    
25    private int _bufsz = DEFAULT_BUF_SIZE;
26    
27    /**
28     * @param numBytes sets the number of bytes that this instance
29     * will allocate to the <code>ByteBuffer</code>s it creates.
30     * 
31     * @see #DEFAULT_BUF_SIZE
32     */
33    public void setBufSize(int numBytes){
34      _bufsz = numBytes;
35    }
36    
37    /**
38     * @return the size of the buffers that this instance creates.
39     */
40    public int getBufSize(){
41      return _bufsz;
42    }
43    
44    /**
45     * @see org.sapia.ubik.net.Pool#onRelease(java.lang.Object)
46     */
47    protected void onRelease(Object   o) {
48      ((ByteBuffer  )o).clear();
49    }
50    
51    /**
52     * @see org.sapia.ubik.net.Pool#doNewObject()
53     */
54    protected Object   doNewObject() throws Exception   {
55      return ByteBuffer.allocateDirect(_bufsz);
56    }
57  
58  }
59

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