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Java > Open Source Codes > com > sun > enterprise > admin > monitor > registry > spi > reconfig > OrbChangeHandler


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
24 /* OrbChangeHandler.java
25  * $Id: OrbChangeHandler.java,v 1.3 2005/12/25 03:43:41 tcfujii Exp $
26  * $Revision: 1.3 $
27  * $Date: 2005/12/25 03:43:41 $
28  * Indentation Information:
29  * 0. Please (try to) preserve these settings.
30  * 1. Tabs are preferred over spaces.
31  * 2. In vi/vim -
32  * :set tabstop=4 :set shiftwidth=4 :set softtabstop=4
33  * 3. In S1 Studio -
34  * 1. Tools->Options->Editor Settings->Java Editor->Tab Size = 4
35  * 2. Tools->Options->Indentation Engines->Java Indentation Engine->Expand Tabs to Spaces = False.
36  * 3. Tools->Options->Indentation Engines->Java Indentation Engine->Number of Spaces per Tab = 4.
37  */
38
39 package com.sun.enterprise.admin.monitor.registry.spi.reconfig;
40
41 import java.util.Iterator JavaDoc;
42 import java.util.logging.Logger JavaDoc;
43 import com.sun.enterprise.admin.monitor.registry.MonitoringLevel;
44 import com.sun.enterprise.admin.monitor.registry.MonitoredObjectType;
45 import com.sun.enterprise.admin.monitor.registry.StatsHolder;
46
47 import com.sun.enterprise.admin.monitor.registry.spi.ValueListMap;
48 import com.sun.enterprise.admin.monitor.registry.spi.MonitoringRegistrationHelper;
49 import com.sun.enterprise.admin.common.constant.AdminConstants;
50
51 /**
52  * Provides for dynamic reconfiguration of ORB and related components like
53  * connection manager. This class decides the actions to take when there are
54  * changes to the monitoring level through administrative interfaces.
55  * @author <a HREF="mailto:Kedar.Mhaswade@sun.com">Kedar Mhaswade</a>
56  * @since S1AS8.0
57  * @version $Revision: 1.3 $
58  */
59 class OrbChangeHandler implements ChangeHandler {
60     
61     private final ChangeHandler successor;
62     private final ValueListMap listeners;
63     
64     private static final Logger JavaDoc logger = Logger.getLogger(AdminConstants.kLoggerName);
65     
66     OrbChangeHandler(ChangeHandler successor, ValueListMap listeners) {
67         this.successor = successor;
68         this.listeners = listeners;
69     }
70     
71     public void handleChange(MonitoredObjectType t, MonitoringLevel from, MonitoringLevel to) {
72         if (isOrbType(t)) {
73             handleChange(from, to);
74         }
75         else {
76             successor.handleChange(t, from, to);
77         }
78     }
79     
80     private boolean isOrbType(MonitoredObjectType t) {
81         return ( t == MonitoredObjectType.ORB ||
82                  t == MonitoredObjectType.CONNECTION_MANAGER);
83     }
84     
85     private void handleChange(MonitoringLevel from, MonitoringLevel to) {
86         if (off2Low(from, to) || off2High(from, to)) {
87             notifyListeners(from, to);
88             registerMBeans();
89         }
90         if (low2Off(from, to) || high2Off(from, to)) {
91             unregisterMBeans();
92             notifyListeners(from, to);
93         }
94         if (low2High(from, to) || high2Low(from, to)) {
95             //currently do nothing.
96 }
97     }
98     
99     private void notifyListeners(MonitoringLevel from, MonitoringLevel to) {
100         logger.finer("DynamicReconfigurator: Now notifying the listeners for ORB stats --- from = " + from.toString() + " to = " + to.toString());
101     }
102     
103     private void registerMBeans() {
104         final MonitoringRegistrationHelper registryImpl =
105             (MonitoringRegistrationHelper) MonitoringRegistrationHelper.getInstance();
106         //note that the above refers to the actual implementation rather than interface.
107
108         //registers MBeans pertaining to all the connection managers
109 final Iterator JavaDoc iter = registryImpl.getOrbNodes().iterator();
110         while (iter.hasNext()) {
111             final StatsHolder c = (StatsHolder) iter.next();
112             c.registerMBean();
113             logger.finer("DynamicReconfigurator: Now Registering MBean for --- " + c.getName());
114         }
115     }
116     
117     private void unregisterMBeans() {
118         final MonitoringRegistrationHelper registryImpl =
119             (MonitoringRegistrationHelper) MonitoringRegistrationHelper.getInstance();
120         //note that the above refers to the actual implementation rather than interface.
121
122         final Iterator JavaDoc iter = registryImpl.getOrbNodes().iterator();
123         while (iter.hasNext()) {
124             final StatsHolder c = (StatsHolder) iter.next();
125             c.unregisterMBean();
126             logger.finer("DynamicReconfigurator: Now UnRegistering MBean for --- " + c.getName());
127         }
128     }
129
130     private boolean off2Low(MonitoringLevel from, MonitoringLevel to) {
131         return ( from == MonitoringLevel.OFF && to == MonitoringLevel.LOW );
132     }
133     private boolean off2High(MonitoringLevel from, MonitoringLevel to) {
134         return ( from == MonitoringLevel.OFF && to == MonitoringLevel.HIGH );
135     }
136     private boolean low2Off(MonitoringLevel from, MonitoringLevel to) {
137         return ( from == MonitoringLevel.LOW && to == MonitoringLevel.OFF);
138     }
139     private boolean high2Off(MonitoringLevel from, MonitoringLevel to) {
140         return ( from == MonitoringLevel.HIGH && to == MonitoringLevel.OFF );
141     }
142     private boolean low2High(MonitoringLevel from, MonitoringLevel to) {
143         return ( from == MonitoringLevel.LOW && to == MonitoringLevel.HIGH);
144     }
145     private boolean high2Low(MonitoringLevel from, MonitoringLevel to) {
146         return ( from == MonitoringLevel.HIGH && to == MonitoringLevel.LOW );
147     }
148 }
149
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