Source Code Cross Referenced for Chat.java in  » Net » JGroups-2.4.1-sp3 » org » jgroups » demos » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » JGroups 2.4.1 sp3 » org.jgroups.demos 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package org.jgroups.demos;
002:
003:        import org.jgroups.*;
004:        import org.jgroups.util.Util;
005:        import org.jgroups.blocks.PullPushAdapter;
006:
007:        import javax.swing.*;
008:        import java.awt.*;
009:        import java.awt.event.MouseEvent;
010:        import java.awt.event.MouseListener;
011:        import java.awt.event.WindowEvent;
012:        import java.awt.event.WindowListener;
013:        import java.util.LinkedList;
014:        import java.util.Iterator;
015:        import java.io.*;
016:
017:        /**
018:         * Simple chat demo
019:         * @author Bela Ban
020:         * @version $Id: Chat.java,v 1.15 2006/09/27 19:21:54 vlada Exp $
021:         */
022:        public class Chat implements  MouseListener, WindowListener,
023:                ExtendedMessageListener, ExtendedMembershipListener {
024:            Channel channel;
025:            PullPushAdapter ad;
026:            Thread mainThread;
027:            final String group_name = "ChatGroup";
028:            String props = null;
029:            Frame mainFrame;
030:            TextArea ta;
031:            TextField tf;
032:            Label csLabel;
033:            JButton leaveButton;
034:            JButton sendButton;
035:            JButton clearButton;
036:            String username = null;
037:            LinkedList history = new LinkedList();
038:
039:            public Chat(String props) {
040:                this .props = props;
041:                try {
042:                    username = System.getProperty("user.name");
043:                } catch (Throwable t) {
044:                }
045:            }
046:
047:            public static void main(String[] args) {
048:                String props = null;
049:
050:                for (int i = 0; i < args.length; i++) {
051:                    if ("-props".equals(args[i])) {
052:                        props = args[++i];
053:                        continue;
054:                    }
055:                    help();
056:                    return;
057:                }
058:
059:                Chat chat = new Chat(props);
060:                chat.start();
061:            }
062:
063:            static void help() {
064:                System.out.println("Chat [-help] [-props <properties>]");
065:            }
066:
067:            public void start() {
068:                mainFrame = new Frame();
069:                mainFrame.setLayout(null);
070:                mainFrame.setSize(600, 507);
071:                mainFrame.addWindowListener(this );
072:
073:                ta = new TextArea();
074:                ta.setBounds(12, 36, 550, 348);
075:                ta.setEditable(false);
076:                mainFrame.add(ta);
077:
078:                tf = new TextField();
079:                tf.setBounds(100, 392, 400, 30);
080:                mainFrame.add(tf);
081:
082:                csLabel = new Label("Send:");
083:                csLabel.setBounds(12, 392, 85, 30);
084:                mainFrame.add(csLabel);
085:
086:                leaveButton = new JButton("Leave");
087:                leaveButton.setBounds(12, 428, 150, 30);
088:                leaveButton.addMouseListener(this );
089:                mainFrame.add(leaveButton);
090:
091:                sendButton = new JButton("Send");
092:                sendButton.setBounds(182, 428, 150, 30);
093:                sendButton.addMouseListener(this );
094:                mainFrame.add(sendButton);
095:
096:                clearButton = new JButton("Clear");
097:                clearButton.setBounds(340, 428, 150, 30);
098:                clearButton.addMouseListener(this );
099:                mainFrame.add(clearButton);
100:
101:                try {
102:                    channel = new JChannel(props);
103:                    channel.setOpt(Channel.AUTO_RECONNECT, Boolean.TRUE);
104:                    channel.setOpt(Channel.AUTO_GETSTATE, Boolean.TRUE);
105:                    channel.setOpt(Channel.BLOCK, Boolean.TRUE);
106:                    System.out.println("Connecting to " + group_name);
107:                    channel.connect(group_name);
108:                    ad = new PullPushAdapter(channel, this , this );
109:                    channel.getState(null, 5000);
110:                } catch (Exception e) {
111:                    ta.append(e.toString());
112:                }
113:                mainFrame.pack();
114:                mainFrame.setLocation(15, 25);
115:                mainFrame.setBounds(new Rectangle(580, 480));
116:                mainFrame.setVisible(true);
117:                mainFrame.show();
118:                if (history.size() > 0) {
119:                    for (Iterator it = history.iterator(); it.hasNext();) {
120:                        String s = (String) it.next();
121:                        ta.append(s + "\n");
122:                    }
123:                }
124:            }
125:
126:            /* -------------------- Interface MessageListener ------------------- */
127:
128:            public void receive(Message msg) {
129:                Object o;
130:
131:                try {
132:                    o = msg.getObject();
133:                    ta.append(o + " [" + msg.getSrc() + "]\n");
134:                    history.add(o);
135:                } catch (Exception e) {
136:                    ta.append("Chat.receive(): " + e);
137:                }
138:            }
139:
140:            public byte[] getState(String state_id) {
141:                //partial state transfer not used
142:                return null;
143:            }
144:
145:            public byte[] getState() {
146:                try {
147:                    return Util.objectToByteBuffer(history);
148:                } catch (Exception e) {
149:                    return null;
150:                }
151:            }
152:
153:            public void setState(byte[] state) {
154:                try {
155:                    history = (LinkedList) Util.objectFromByteBuffer(state);
156:                } catch (Exception e) {
157:                    e.printStackTrace();
158:                }
159:            }
160:
161:            public void setState(String state_id, byte[] state) {
162:                //partial state transfer not used		
163:            }
164:
165:            public void getState(OutputStream os) {
166:                ObjectOutputStream oos = null;
167:                try {
168:                    oos = new ObjectOutputStream(os);
169:                    oos.writeObject(history);
170:                    oos.flush();
171:                } catch (IOException e) {
172:                } finally {
173:                    try {
174:                        oos.close();
175:                    } catch (IOException e) {
176:                        System.err.println(e);
177:                    }
178:                }
179:            }
180:
181:            public void setState(InputStream is) {
182:                ObjectInputStream ois = null;
183:                try {
184:                    ois = new ObjectInputStream(is);
185:                    history = (LinkedList) ois.readObject();
186:                } catch (Exception e) {
187:                } finally {
188:                    try {
189:                        ois.close();
190:                    } catch (IOException e) {
191:                        System.err.println(e);
192:                    }
193:                }
194:            }
195:
196:            public void getState(String state_id, OutputStream ostream) {
197:                //partial state transfer not used
198:
199:            }
200:
201:            public void setState(String state_id, InputStream istream) {
202:                //partial state transfer not used		
203:            }
204:
205:            /* ----------------- End of Interface MessageListener --------------- */
206:
207:            /* ------------------- Interface MembershipListener ----------------- */
208:
209:            public void viewAccepted(View new_view) {
210:                ta.append("Received view " + new_view + '\n');
211:            }
212:
213:            public void suspect(Address suspected_mbr) {
214:            }
215:
216:            public void block() {
217:            }
218:
219:            public void unblock() {
220:            }
221:
222:            /* --------------- End of Interface MembershipListener -------------- */
223:
224:            private synchronized void handleLeave() {
225:                try {
226:                    System.out.print("Stopping PullPushAdapter");
227:                    ad.stop();
228:                    System.out.println(" -- done");
229:
230:                    System.out.print("Disconnecting the channel");
231:                    channel.disconnect();
232:                    System.out.println(" -- done");
233:
234:                    System.out.print("Closing the channel");
235:                    channel.close();
236:                    System.out.println(" -- done");
237:                    System.exit(0);
238:                } catch (Exception e) {
239:                    e.printStackTrace();
240:                    ta.append("Failed leaving the group: " + e.toString()
241:                            + '\n');
242:                }
243:            }
244:
245:            private void handleSend() {
246:                try {
247:                    Message msg = new Message(null, null, username + ": "
248:                            + tf.getText());
249:                    channel.send(msg);
250:                } catch (Exception e) {
251:                    ta.append("Failed sending message: " + e.toString() + '\n');
252:                }
253:            }
254:
255:            public void mouseClicked(MouseEvent e) {
256:                Object obj = e.getSource();
257:
258:                if (obj == leaveButton)
259:                    handleLeave();
260:                else if (obj == sendButton)
261:                    handleSend();
262:                else if (obj == clearButton)
263:                    ta.setText("");
264:            }
265:
266:            public void mouseEntered(MouseEvent e) {
267:            }
268:
269:            public void mouseExited(MouseEvent e) {
270:            }
271:
272:            public void mousePressed(MouseEvent e) {
273:            }
274:
275:            public void mouseReleased(MouseEvent e) {
276:            }
277:
278:            public void windowActivated(WindowEvent e) {
279:            }
280:
281:            public void windowClosed(WindowEvent e) {
282:            }
283:
284:            public void windowClosing(WindowEvent e) {
285:                System.exit(0);
286:            }
287:
288:            public void windowDeactivated(WindowEvent e) {
289:            }
290:
291:            public void windowDeiconified(WindowEvent e) {
292:            }
293:
294:            public void windowIconified(WindowEvent e) {
295:            }
296:
297:            public void windowOpened(WindowEvent e) {
298:            }
299:
300:        }
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