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Java > Open Source Codes > org > apache > avalon > fortress > examples > servlet > ServletContainer


1 /*
2
3  ============================================================================
4                    The Apache Software License, Version 1.1
5  ============================================================================
6
7  Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
8
9  Redistribution and use in source and binary forms, with or without modifica-
10  tion, are permitted provided that the following conditions are met:
11
12  1. Redistributions of source code must retain the above copyright notice,
13     this list of conditions and the following disclaimer.
14
15  2. Redistributions in binary form must reproduce the above copyright notice,
16     this list of conditions and the following disclaimer in the documentation
17     and/or other materials provided with the distribution.
18
19  3. The end-user documentation included with the redistribution, if any, must
20     include the following acknowledgment: "This product includes software
21     developed by the Apache Software Foundation (http://www.apache.org/)."
22     Alternately, this acknowledgment may appear in the software itself, if
23     and wherever such third-party acknowledgments normally appear.
24
25  4. The names "Jakarta", "Avalon", "Excalibur" and "Apache Software Foundation"
26     must not be used to endorse or promote products derived from this software
27     without prior written permission. For written permission, please contact
28     apache@apache.org.
29
30  5. Products derived from this software may not be called "Apache", nor may
31     "Apache" appear in their name, without prior written permission of the
32     Apache Software Foundation.
33
34  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
35  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
36  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
37  APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
38  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
39  DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
40  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
41  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
42  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
43  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44
45  This software consists of voluntary contributions made by many individuals
46  on behalf of the Apache Software Foundation. For more information on the
47  Apache Software Foundation, please see <http://www.apache.org/>.
48
49 */
50 package org.apache.avalon.fortress.examples.servlet;
51
52 import java.io.IOException JavaDoc;
53 import javax.servlet.ServletException JavaDoc;
54 import javax.servlet.ServletRequest JavaDoc;
55 import javax.servlet.ServletResponse JavaDoc;
56
57 /**
58  * Fortress based servlet example. Presents a simple page to the user
59  * displaying the possible languages they can see the text 'hello world'
60  * written in.
61  *
62  * @author <a HREF="mailto:crafterm@apache.org">Marcus Crafter</a>
63  * @version CVS $Revision: 1.6 $ $Date: 2003/04/11 07:36:20 $
64  */
65 public final class ServletContainer extends org.apache.avalon.fortress.impl.DefaultContainer
66 {
67     public static final String JavaDoc KEY = "hello-world";
68
69     private org.apache.avalon.fortress.examples.components.Translator m_translator;
70
71     /**
72      * Initializes this component.
73      *
74      * @exception java.lang.Exception if an error occurs
75      */
76     public void initialize()
77         throws Exception JavaDoc
78     {
79         super.initialize();
80
81         m_translator = (org.apache.avalon.fortress.examples.components.Translator)m_serviceManager.lookup( org.apache.avalon.fortress.examples.components.Translator.ROLE );
82     }
83
84     /**
85      * Simple method to handle requests sent to the container from the
86      * controlling servlet. This container simply displays a page containing
87      * a list of possible languages the user can see the text 'hello world'
88      * written in.
89      *
90      * @param request a <code>ServletRequest</code> instance
91      * @param response a <code>ServletResponse</code> instance
92      * @exception ServletException if a servlet error occurs
93      * @exception java.io.IOException if an IO error occurs
94      */
95     public void handleRequest( ServletRequest JavaDoc request, ServletResponse JavaDoc response )
96         throws ServletException JavaDoc, IOException JavaDoc
97     {
98         java.io.PrintWriter JavaDoc out = response.getWriter();
99         String JavaDoc selected = request.getParameter( "language" );
100         String JavaDoc[] languages = m_translator.getSupportedLanguages( KEY );
101
102         out.println( "<html>" );
103         out.println( "<head><title>Hello World!</title></head>" );
104         out.println( "<body>" );
105         out.println( "<hr>" );
106
107         out.println( "<h1>" );
108
109         if( selected == null )
110         {
111             out.println( "Please select your language" );
112         }
113         else
114         {
115             out.println( m_translator.getTranslation( KEY, selected ) );
116         }
117
118         out.println( "</h1>" );
119         out.println( "<hr>" );
120
121         out.println( "Available languages:" );
122
123         out.println( "<form action='' name='languagelist'>" );
124         out.println( "<select size='1' name='language'>" );
125
126         for( int i = 0; i < languages.length; ++i )
127         {
128             String JavaDoc lang = languages[ i ];
129             out.print( "<option value='" + lang + "'" );
130
131             // preselect chosen language
132
133             if( lang.equals( selected ) )
134             {
135                 out.print( " selected" );
136             }
137
138             out.println( ">" + lang + "</option>" );
139         }
140
141         out.println( "</select>" );
142         out.println( "<input value='OK' type='submit'>" );
143         out.println( "</form>" );
144
145         out.println( "</body>" );
146         out.println( "</html>" );
147
148         out.close();
149     }
150
151     /**
152      * Release resources
153      */
154     public void dispose()
155     {
156         if( m_translator != null )
157             m_serviceManager.release( m_translator );
158
159         super.dispose();
160     }
161 }
162
163
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