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Java > Open Source Codes > org > objectweb > ccm > chat > monolithic > ClientImpl


1 /*====================================================================
2
3 OpenCCM: The Open CORBA Component Model Platform
4 Copyright (C) 2000-2002 USTL - LIFL - GOAL
5 Contact: openccm-team@objectweb.org
6
7 This library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or any later version.
11
12 This library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
16
17 You should have received a copy of the GNU Lesser General Public
18 License along with this library; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 USA
21
22 Initial developer(s): Areski Flissi.
23 Contributor(s):
24
25 ====================================================================*/
26
27 package org.objectweb.ccm.chat.monolithic;
28
29 import org.objectweb.ccm.chat.*;
30
31 /**
32  * This is the implementation of the OMG IDL3 chat::Client component type.
33  *
34  * This class inherits from the local CCM_Client interface
35  * generated by the OpenCCM's IDL3 to IDL2 mapping generator.
36  *
37  * This class also implements the java.awt.event.ActionListener to manage
38  * users' interactions on the Swing GUI associated to this component.
39  *
40  * @author <a HREF="mailto:Areski.Flissi@lifl.fr">Areski Flissi</A>
41  */
42
43 public class ClientImpl
44      extends org.omg.CORBA.LocalObject JavaDoc
45   implements CCM_Client,
46              org.omg.Components.SessionComponent,
47              java.awt.event.ActionListener JavaDoc
48 {
49     // ==================================================================
50 //
51 // Internal state.
52 //
53 // ==================================================================
54
55     /** The name of the component. */
56     private String JavaDoc name_;
57     
58     /** To refer to the GUI frame. */
59     private java.awt.Frame JavaDoc frame_;
60     /** To refer to the GUI user input field. */
61     private java.awt.TextField JavaDoc text_;
62     /** To refer to the GUI user output area. */
63     private java.awt.TextArea JavaDoc textArea_;
64
65     /** To refer to the component context. */
66     private CCM_Client_Context the_context_;
67
68
69     public static final java.awt.Color JavaDoc white_ = java.awt.Color.white;
70     
71     
72     // ==================================================================
73 //
74 // Constructor.
75 //
76 // ==================================================================
77
78     /** The default constructor. */
79     public
80     ClientImpl()
81     {
82     }
83
84     // ==================================================================
85 //
86 // Internal methods.
87 //
88 // ==================================================================
89
90     // ==================================================================
91 //
92 // Public methods.
93 //
94 // ==================================================================
95
96     // ==================================================================
97 //
98 // Methods for OMG IDL Components::EnterpriseComponent
99 //
100 // ==================================================================
101
102     /**
103      * Complete the component configuration.
104      *
105      * @exception org.omg.Components.InvalidConfiguration
106      * Thrown if the configuration is invalid.
107      */
108     public void
109     configuration_complete()
110     throws org.omg.Components.InvalidConfiguration
111     {
112         // Checks if the configuration is completed.
113 if(name_ == null)
114             throw new org.omg.Components.InvalidConfiguration();
115
116         // Check if the connection to the server is set.
117 if(the_context_.get_connection_the_service() == null)
118             throw new org.omg.Components.InvalidConfiguration();
119
120     //Instantiating the GUI.
121 // Creates a AWT Frame.
122 frame_ = new java.awt.Frame JavaDoc(name_ + "'s Chat GUI");
123         
124     // Creates a text area for displaying inputs.
125 textArea_ = new java.awt.TextArea JavaDoc();
126     textArea_.setEditable(false);
127     textArea_.setBackground(white_);
128          
129          
130     //Creates a text field for user's inputs.
131 text_ = new java.awt.TextField JavaDoc("", 1);
132     // Creates a button to invoke the connected server component.
133 java.awt.Button JavaDoc button = new java.awt.Button JavaDoc("Print Text");
134     button.addActionListener(this);
135     // Constructs and shows the GUI.
136 java.awt.Panel JavaDoc panel = new java.awt.Panel JavaDoc(
137                                 new java.awt.BorderLayout JavaDoc()
138                                     );
139     System.out.println("___________________________");
140     frame_.setLayout ( new java.awt.BorderLayout JavaDoc() ) ;
141     frame_.add(panel);
142                  
143     panel.add(textArea_,java.awt.BorderLayout.NORTH);
144     panel.add(text_,java.awt.BorderLayout.CENTER);
145     panel.add(button,java.awt.BorderLayout.SOUTH);
146     
147     frame_.setSize(400,300);
148     frame_.pack();
149     frame_.show();
150     }
151
152     // ==================================================================
153 //
154 // Methods for the OMG IDL org.omg.Components.SessionComponent
155 //
156 // ==================================================================
157
158     /**
159      * Set the session component context.
160      *
161      * @param context The session component context.
162      *
163      * @throw org.omg.Components.CCMException For any problems.
164      */
165     public void
166     set_session_context(org.omg.Components.SessionContext context)
167     throws org.omg.Components.CCMException
168     {
169         the_context_ = (CCM_Client_Context)context;
170     }
171
172     /**
173      * Container callback to signal that the component is activated.
174      *
175      * @throw org.omg.Components.CCMException For any problems.
176      */
177     public void
178     ccm_activate()
179     throws org.omg.Components.CCMException
180     {
181         // Nothing to do currently.
182 }
183
184     /**
185      * Container callback to signal that the component is activated.
186      *
187      * @throw org.omg.Components.CCMException For any problems.
188      */
189     public void
190     ccm_passivate()
191     throws org.omg.Components.CCMException
192     {
193         // Nothing to do currently.
194 }
195
196     /**
197      * Container callback to signal that the component is removed.
198      *
199      * @throw org.omg.Components.CCMException For any problems.
200      */
201     public void
202     ccm_remove()
203     throws org.omg.Components.CCMException
204     {
205         // Release the associated frame.
206 if(frame_!=null)
207             frame_.dispose();
208         frame_ = null;
209     }
210
211     // ==================================================================
212 //
213 // Methods for OMG IDL chat::CCM_NamedComponent_Executor
214 //
215 // ==================================================================
216
217     /**
218      * The mutator method for the attribute name.
219      *
220      * @param n The name.
221      */
222     public void
223     name(String JavaDoc n)
224     {
225         name_ = n;
226
227         if (frame_ != null)
228             frame_.setTitle(name_ + "'s Client GUI");
229     }
230
231     /**
232      * The accessor method for the attribute name.
233      *
234      * @return The name.
235      */
236     public String JavaDoc
237     name()
238     {
239         return name_;
240     }
241
242     // ==================================================================
243 //
244 // Methods for interface java.awt.event.ActionListener
245 //
246 // ==================================================================
247
248     /**
249      * When the button is selectionned.
250      *
251      * @param e The associate ActionEvent.
252      */
253     public void
254     actionPerformed(java.awt.event.ActionEvent JavaDoc e)
255     {
256         // Obtain the object reference associated to the
257 // 'the_service' receptacle.
258 Service service = the_context_.get_connection_the_service();
259
260         // Check if the connection is available.
261 if(service == null)
262         {
263             System.err.println("The chat::Client::the_service receptacle is not set!");
264             return;
265         }
266
267         // Calls the display service.
268 service.display(name_ + ":" + text_.getText());
269         
270         // Reset entered text
271 text_.setText("");
272         
273     }
274     
275     
276     
277     // ==================================================================
278 //
279 // Methods for OMG IDL chat::CCM_Client
280 //
281 // ==================================================================
282
283     
284     public void
285         push_from_servers(TextEvent event)
286         {
287             push(event);
288         }
289     
290     
291     
292     // ==================================================================
293 //
294 // Methods for OMG IDL chat::CCM_TextEventConsumer
295 //
296 // ==================================================================
297
298     /**
299      * To receive chat::Event events published by chat::Server components.
300      *
301      * @param event The received event.
302      */
303     public void
304     push(TextEvent event)
305     {
306         // Put the text into the text area.
307 textArea_.append(event.text + "\n");
308     }
309     
310
311 }
312
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