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Java > Open Source Codes > org > logicalcobwebs > concurrent > DefaultChannelCapacity


1 /*
2   File: DefaultChannelCapacity.java
3
4   Originally written by Doug Lea and released into the public domain.
5   This may be used for any purposes whatsoever without acknowledgment.
6   Thanks for the assistance and support of Sun Microsystems Labs,
7   and everyone contributing, testing, and using this code.
8
9   History:
10   Date Who What
11   11Jun1998 dl Create public version
12 */
13
14 package org.logicalcobwebs.concurrent;
15
16 /**
17  * A utility class to set the default capacity of
18  * BoundedChannel
19  * implementations that otherwise require a capacity argument
20  * @see BoundedChannel
21  * [<a HREF="http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html"> Introduction to this package. </a>] <p>
22  **/
23
24 public class DefaultChannelCapacity {
25
26     /** The initial value of the default capacity is 1024 **/
27     public static final int INITIAL_DEFAULT_CAPACITY = 1024;
28
29     /** the current default capacity **/
30     private static final SynchronizedInt defaultCapacity_ =
31             new SynchronizedInt(INITIAL_DEFAULT_CAPACITY);
32
33     /**
34      * Set the default capacity used in
35      * default (no-argument) constructor for BoundedChannels
36      * that otherwise require a capacity argument.
37      * @exception IllegalArgumentException if capacity less or equal to zero
38      */
39     public static void set(int capacity) {
40         if (capacity <= 0) throw new IllegalArgumentException JavaDoc();
41         defaultCapacity_.set(capacity);
42     }
43
44     /**
45      * Get the default capacity used in
46      * default (no-argument) constructor for BoundedChannels
47      * that otherwise require a capacity argument.
48      * Initial value is <code>INITIAL_DEFAULT_CAPACITY</code>
49      * @see #INITIAL_DEFAULT_CAPACITY
50      */
51     public static int get() {
52         return defaultCapacity_.get();
53     }
54 }
55
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