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Java > Open Source Codes > com > sun > appserv > management > base > ListenerInfo


1 /*
2  * The contents of this file are subject to the terms
3  * of the Common Development and Distribution License
4  * (the License). You may not use this file except in
5  * compliance with the License.
6  *
7  * You can obtain a copy of the license at
8  * https://glassfish.dev.java.net/public/CDDLv1.0.html or
9  * glassfish/bootstrap/legal/CDDLv1.0.txt.
10  * See the License for the specific language governing
11  * permissions and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL
14  * Header Notice in each file and include the License file
15  * at glassfish/bootstrap/legal/CDDLv1.0.txt.
16  * If applicable, add the following below the CDDL Header,
17  * with the fields enclosed by brackets [] replaced by
18  * you own identifying information:
19  * "Portions Copyrighted [year] [name of copyright owner]"
20  *
21  * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
22  */
23 package com.sun.appserv.management.base;
24
25
26 /**
27     Provide information about who's listening.
28  */
29 public interface ListenerInfo
30 {
31     /**
32         Get the number of listeners which are listening for the
33         specified type of Notification. If there are anonymous listeners (those
34         that have no filter or a non-standard filter) then this routine will
35         return the value 1.
36         
37         @param notificationType any Notification type, should usually be one advertised via MBeanInfo
38         @return count of listeners
39      */
40     public int getNotificationTypeListenerCount( final String JavaDoc notificationType );
41     
42     
43     /**
44         Get the total number of listeners listening for anything.
45         
46         @return count of listeners
47      */
48     public int getListenerCount();
49 }
50
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