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Java > Open Source Codes > com > jcorporate > expresso > kernel > RuntimeInitServlet


1 /* ====================================================================
2  * The Jcorporate Apache Style Software License, Version 1.2 05-07-2002
3  *
4  * Copyright (c) 1995-2003 Jcorporate Ltd. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
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13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in
15  * the documentation and/or other materials provided with the
16  * distribution.
17  *
18  * 3. The end-user documentation included with the redistribution,
19  * if any, must include the following acknowledgment:
20  * "This product includes software developed by Jcorporate Ltd.
21  * (http://www.jcorporate.com/)."
22  * Alternately, this acknowledgment may appear in the software itself,
23  * if and wherever such third-party acknowledgments normally appear.
24  *
25  * 4. "Jcorporate" and product names such as "Expresso" must
26  * not be used to endorse or promote products derived from this
27  * software without prior written permission. For written permission,
28  * please contact info@jcorporate.com.
29  *
30  * 5. Products derived from this software may not be called "Expresso",
31  * or other Jcorporate product names; nor may "Expresso" or other
32  * Jcorporate product names appear in their name, without prior
33  * written permission of Jcorporate Ltd.
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35  * 6. No product derived from this software may compete in the same
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38  * partners@jcorporate.com.
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40  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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42  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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46  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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50  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
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54  * This software consists of voluntary contributions made by many
55  * individuals on behalf of the Jcorporate Ltd. Contributions back
56  * to the project(s) are encouraged when you make modifications.
57  * Please send them to support@jcorporate.com. For more information
58  * on Jcorporate Ltd. and its products, please see
59  * <http://www.jcorporate.com/>.
60  *
61  * Portions of this software are based upon other open source
62  * products and are subject to their respective licenses.
63  */
64 package com.jcorporate.expresso.kernel;
65
66 import com.jcorporate.expresso.core.misc.ConfigManager;
67 import com.jcorporate.expresso.kernel.exception.ConfigurationException;
68 import org.apache.log4j.Logger;
69
70 import javax.servlet.ServletConfig JavaDoc;
71 import javax.servlet.ServletException JavaDoc;
72 import javax.servlet.http.HttpServlet JavaDoc;
73
74 /**
75  * This is an initialization servlet that provides a running example on how
76  * to load an Expresso runtime system
77  *
78  * @author Michael Rimov
79  * @since Expresso 5.1
80  */
81 public class RuntimeInitServlet extends HttpServlet JavaDoc {
82
83     /**
84      * Logging directory parameter
85      */
86     private String JavaDoc loggingDirectory;
87
88     /**
89      * Expresso Services Config location
90      */
91     private String JavaDoc expressoServicesConfig;
92
93     /**
94      * Logging configuration
95      */
96     private String JavaDoc loggingConfig;
97
98     /**
99      * Log4j Log
100      */
101     private Logger log;
102
103     /**
104      * Expresso runtime root container
105      */
106     private RootContainerInterface root;
107
108     public RuntimeInitServlet() {
109     }
110
111     /**
112      * Initialize the Expresso runtime system.
113      *
114      * @param sc The ServletConfig. The Servlet config in web.xml needs to
115      * have 3 parameters set: loggingDirectory, expressoConfig, and loggingConfig.
116      * @throws javax.servlet.ServletException upon instantiation error
117      */
118     public void init(ServletConfig JavaDoc sc) throws javax.servlet.ServletException JavaDoc {
119         super.init(sc);
120
121         try {
122             long startTime = System.currentTimeMillis();
123             loggingDirectory = sc.getInitParameter(ConfigManager.LOG_DIR_PARAM_NAME);
124             expressoServicesConfig = sc.getInitParameter("expressoConfig");
125             loggingConfig = sc.getInitParameter("loggingConfig");
126             root = SystemFactory.buildExpressoComponentSystem(expressoServicesConfig,
127                     loggingConfig, loggingDirectory);
128
129             log = Logger.getLogger(RuntimeInitServlet.class);
130             long endTime = System.currentTimeMillis();
131             log.info("Completed initialization in " + (endTime - startTime) / 1000 + " seconds");
132         } catch (ConfigurationException ex) {
133             this.log("Error loading Expresso Configuration", ex);
134             throw new ServletException JavaDoc("Error loading Expresso Configuration", ex);
135         }
136     }
137
138     /**
139      * Destroys the servlet and the Global Expresso runtime container.
140      */
141     public void destroy() {
142         if (log != null) {
143             log.info("Destroying Global Runtime Container");
144         }
145
146         if (root != null) {
147             root.destroy();
148         }
149     }
150
151
152 }
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