Source Code Cross Referenced for SchedulerWatchdogFactory.java in  » Net » james-2.3.1 » org » apache » james » util » watchdog » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Java Source Code / Java Documentation
1. 6.0 JDK Core
2. 6.0 JDK Modules
3. 6.0 JDK Modules com.sun
4. 6.0 JDK Modules com.sun.java
5. 6.0 JDK Modules sun
6. 6.0 JDK Platform
7. Ajax
8. Apache Harmony Java SE
9. Aspect oriented
10. Authentication Authorization
11. Blogger System
12. Build
13. Byte Code
14. Cache
15. Chart
16. Chat
17. Code Analyzer
18. Collaboration
19. Content Management System
20. Database Client
21. Database DBMS
22. Database JDBC Connection Pool
23. Database ORM
24. Development
25. EJB Server geronimo
26. EJB Server GlassFish
27. EJB Server JBoss 4.2.1
28. EJB Server resin 3.1.5
29. ERP CRM Financial
30. ESB
31. Forum
32. GIS
33. Graphic Library
34. Groupware
35. HTML Parser
36. IDE
37. IDE Eclipse
38. IDE Netbeans
39. Installer
40. Internationalization Localization
41. Inversion of Control
42. Issue Tracking
43. J2EE
44. JBoss
45. JMS
46. JMX
47. Library
48. Mail Clients
49. Net
50. Parser
51. PDF
52. Portal
53. Profiler
54. Project Management
55. Report
56. RSS RDF
57. Rule Engine
58. Science
59. Scripting
60. Search Engine
61. Security
62. Sevlet Container
63. Source Control
64. Swing Library
65. Template Engine
66. Test Coverage
67. Testing
68. UML
69. Web Crawler
70. Web Framework
71. Web Mail
72. Web Server
73. Web Services
74. Web Services apache cxf 2.0.1
75. Web Services AXIS2
76. Wiki Engine
77. Workflow Engines
78. XML
79. XML UI
Java
Java Tutorial
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Java Source Code / Java Documentation » Net » james 2.3.1 » org.apache.james.util.watchdog 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /****************************************************************
002:         * Licensed to the Apache Software Foundation (ASF) under one   *
003:         * or more contributor license agreements.  See the NOTICE file *
004:         * distributed with this work for additional information        *
005:         * regarding copyright ownership.  The ASF licenses this file   *
006:         * to you under the Apache License, Version 2.0 (the            *
007:         * "License"); you may not use this file except in compliance   *
008:         * with the License.  You may obtain a copy of the License at   *
009:         *                                                              *
010:         *   http://www.apache.org/licenses/LICENSE-2.0                 *
011:         *                                                              *
012:         * Unless required by applicable law or agreed to in writing,   *
013:         * software distributed under the License is distributed on an  *
014:         * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
015:         * KIND, either express or implied.  See the License for the    *
016:         * specific language governing permissions and limitations      *
017:         * under the License.                                           *
018:         ****************************************************************/package org.apache.james.util.watchdog;
019:
020:        import org.apache.avalon.cornerstone.services.scheduler.PeriodicTimeTrigger;
021:        import org.apache.avalon.cornerstone.services.scheduler.Target;
022:        import org.apache.avalon.cornerstone.services.scheduler.TimeScheduler;
023:
024:        /**
025:         * This class is a factory to produce Watchdogs, each of which is associated
026:         * with a single TimeScheduler Target and a TimeScheduler object.
027:         *
028:         * This could be used in James by adding a server configuration
029:         * parameter:
030:         *
031:         *     schedulerWatchdogs = conf.getChild("useSchedulerWatchdogs").getValueAsBoolean(false);
032:         *
033:         * getting the TimeScheduler component:
034:         *
035:         *     scheduler = (TimeScheduler) compMgr.lookup(TimeScheduler.ROLE);
036:         *
037:         * and changing AbstractJamesService.getWatchdogFactory to look
038:         * something like: 
039:         *
040:         *     protected WatchdogFactory getWatchdogFactory() {
041:         *        WatchdogFactory theWatchdogFactory = null;
042:         *        if (schedulerWatchdogs) {
043:         *             theWatchdogFactory = new SchedulerWatchdogFactory(scheduler, timeout);
044:         *           } else {
045:         *             theWatchdogFactory = new ThreadPerWatchdogFactory(threadPool, timeout);
046:         *           }
047:         *        if (theWatchdogFactory instanceof LogEnabled) {
048:         *             ((LogEnabled)theWatchdogFactory).enableLogging(getLogger());
049:         *        }
050:         *        return theWatchdogFactory;
051:         *     }
052:         *
053:         */
054:        public class SchedulerWatchdogFactory implements  WatchdogFactory {
055:
056:            /**
057:             * The thread pool used to generate InaccurateTimeoutWatchdogs
058:             */
059:            private TimeScheduler myTimeScheduler;
060:
061:            private long timeout = -1;
062:
063:            /**
064:             * Creates the factory and sets the TimeScheduler used to implement
065:             * the watchdogs.
066:             *
067:             * @param theTimeScheduler the scheduler that manages Watchdog triggering
068:             *                         for Watchdogs produced by this factory
069:             * @param timeout the timeout for Watchdogs produced by this factory
070:             */
071:            public SchedulerWatchdogFactory(TimeScheduler theTimeScheduler,
072:                    long timeout) {
073:                this .timeout = timeout;
074:                myTimeScheduler = theTimeScheduler;
075:            }
076:
077:            /**
078:             * @see org.apache.james.util.watchdog.WatchdogFactory#getWatchdog(WatchdogTarget)
079:             */
080:            public Watchdog getWatchdog(WatchdogTarget theTarget) {
081:                return new SchedulerWatchdog(theTarget);
082:            }
083:
084:            /**
085:             * An inner class that acts as an adaptor between the Watchdog
086:             * interface and the TimeScheduler interface.
087:             */
088:            private class SchedulerWatchdog implements  Watchdog {
089:
090:                /**
091:                 * The in-scheduler identifier for this trigger.
092:                 */
093:                private String triggerID = null;
094:
095:                /**
096:                 * The WatchdogTarget that is passed in when this
097:                 * SchedulerWatchdog is initialized
098:                 */
099:                private WatchdogTarget theWatchdogTarget;
100:
101:                /**
102:                 * Constructor for the SchedulerWatchdog
103:                 *
104:                 * @param theTarget the target triggered by this Watchdog
105:                 */
106:                SchedulerWatchdog(WatchdogTarget theTarget) {
107:                    // TODO: This should be made more robust then just
108:                    //       using toString()
109:                    triggerID = this .toString();
110:                    theWatchdogTarget = theTarget;
111:                }
112:
113:                /**
114:                 * Start this Watchdog, causing it to begin monitoring.  The Watchdog can
115:                 * be stopped and restarted.
116:                 */
117:                public void start() {
118:                    PeriodicTimeTrigger theTrigger = new PeriodicTimeTrigger(
119:                            (int) SchedulerWatchdogFactory.this .timeout, -1);
120:                    Target theTarget = new Target() {
121:                        public void targetTriggered(String targetID) {
122:                            theWatchdogTarget.execute();
123:                        }
124:                    };
125:                    SchedulerWatchdogFactory.this .myTimeScheduler.addTrigger(
126:                            triggerID, theTrigger, theTarget);
127:                }
128:
129:                /**
130:                 * Reset this Watchdog.  Resets any conditions in the implementations
131:                 * (time to expiration, etc.) to their original values
132:                 */
133:                public void reset() {
134:                    SchedulerWatchdogFactory.this .myTimeScheduler
135:                            .resetTrigger(triggerID);
136:                }
137:
138:                /**
139:                 * Stop this Watchdog, terminating the monitoring condition.  The monitor
140:                 * can be restarted with a call to startWatchdog.
141:                 */
142:                public void stop() {
143:                    SchedulerWatchdogFactory.this.myTimeScheduler
144:                            .removeTrigger(triggerID);
145:                }
146:            }
147:
148:        }
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.