ObjectPoolListener


1   /*
2       DBPool - JDBC Connection Pool Manager
3       Copyright (c) Giles Winstanley
4   */
5   package snaq.util;
6   
7   import java.util.EventListener  ;
8   
9   /**
10   * Listener interface for ObjectPoolEvent objects.
11   * Listeners should ensure the implementations of the listed methods return
12   * quickly. Tasks that require more time should spawn a new thread.
13   * @author  Giles Winstanley
14   */
15  public interface ObjectPoolListener extends EventListener  
16  {
17      /**
18       * Called when an item is checked out of the pool.
19       */
20      public void poolCheckOut(ObjectPoolEvent evt);
21      /**
22       * Called when an item is checked back in to the pool.
23       */
24      public void poolCheckIn(ObjectPoolEvent evt);
25      /**
26       * Called when a check-out request causes the poolSize limit to be reached.
27       */
28      public void maxPoolLimitReached(ObjectPoolEvent evt);
29      /**
30       * Called when a check-out request causes the poolSize limit to be exceeded.
31       */
32      public void maxPoolLimitExceeded(ObjectPoolEvent evt);
33      /**
34       * Called when a check-out request causes the maxSize limit to be reached.
35       */
36      public void maxSizeLimitReached(ObjectPoolEvent evt);
37      /**
38       * Called when a check-out request attempts to exceed the maxSize limit.
39       */
40      public void maxSizeLimitError(ObjectPoolEvent evt);
41      /**
42       * Called when the pool's parameters are changed.
43       */
44      public void poolParametersChanged(ObjectPoolEvent evt);
45      /**
46       * Called when the pool is released (no more events are fired by the pool after this event).
47       */
48      public void poolReleased(ObjectPoolEvent evt);
49  }
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