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Java > Open Source Codes > org > snmp4j > event > CounterListener


1 /*_############################################################################
2   _##
3   _## SNMP4J - CounterListener.java
4   _##
5   _## Copyright 2003-2007 Frank Fock and Jochen Katz (SNMP4J.org)
6   _##
7   _## Licensed under the Apache License, Version 2.0 (the "License");
8   _## you may not use this file except in compliance with the License.
9   _## You may obtain a copy of the License at
10   _##
11   _## http://www.apache.org/licenses/LICENSE-2.0
12   _##
13   _## Unless required by applicable law or agreed to in writing, software
14   _## distributed under the License is distributed on an "AS IS" BASIS,
15   _## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16   _## See the License for the specific language governing permissions and
17   _## limitations under the License.
18   _##
19   _##########################################################################*/
20
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24
25 package org.snmp4j.event;
26
27 import java.util.EventListener JavaDoc;
28 // for JavaDoc
29 import org.snmp4j.security.SecurityModel;
30 import org.snmp4j.mp.MessageProcessingModel;
31
32 /**
33  * The <code>CounterListener</code> interface has to be implemented by listener
34  * for {@link CounterEvent} events. By implementing this method, an object is
35  * able to be informed by a {@link MessageProcessingModel},
36  * {@link SecurityModel}, or other objects about conditions causing
37  * certain counters to be incremented.
38  *
39  * @author Frank Fock
40  * @version 1.0
41  */
42 public interface CounterListener extends EventListener JavaDoc {
43
44   /**
45    * Increment the supplied counter instance and return the current value
46    * (after incrementation) in the event object if the event receiver is the
47    * maintainer of the counter value.
48    * @param event
49    * a <code>CounterEvent</code> instance.
50    */
51   void incrementCounter(CounterEvent event);
52
53 }
54
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