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1   package org.apache.commons.jcs3.engine.control.event.behavior;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  /**
23   * This interface defines the behavior for event handler. Event handlers are
24   * transient. They are not replicated and are not written to disk.
25   * <p>
26   * If you want an event handler by default for all elements in a region, then
27   * you can add it to the default element attributes. This way it will get created
28   * whenever an item gets put into the cache.
29   */
30  public interface IElementEventHandler
31  {
32      /**
33       * Handle events for this element. The events are typed.
34       *
35       * @param event
36       *            The event created by the cache.
37       */
38      <T> void handleElementEvent( IElementEvent<T> event );
39  }