|
1
16
17
18
19 package org.apache.commons.daemon;
20
21 import java.io.*;
22 import java.net.*;
23 import java.text.SimpleDateFormat  ;
24 import java.util.Date ;
25 import java.util.Enumeration ;
26 import java.util.Vector ;
27 import org.apache.commons.daemon.Daemon;
28 import org.apache.commons.daemon.DaemonController;
29 import org.apache.commons.daemon.DaemonContext;
30
31 public class SimpleDaemon implements Daemon, Runnable {
32
33 private ServerSocket server=null;
34 private Thread thread=null;
35 private DaemonController controller=null;
36 private boolean stopping=false;
37 private String directory=null;
38 private Vector handlers=null;
39
40 public SimpleDaemon() {
41 super();
42 System.err.println("SimpleDaemon: instance "+this.hashCode()+
43 " created");
44 this.handlers=new Vector ();
45 }
46
47 protected void finalize() {
48 System.err.println("SimpleDaemon: instance "+this.hashCode()+
49 " garbage collected");
50 }
51
52
55 public void init(DaemonContext context)
56 throws Exception {
57 System.err.println("SimpleDaemon: instance "+this.hashCode()+
58 " init");
59
60 int port=1200;
61
62 String [] a = context.getArguments();
63
64 if (a.length>0) port=Integer.parseInt(a[0]);
65 if (a.length>1) this.directory=a[1];
66 else this.directory="/tmp";
67
68
69 System.err.println("SimpleDaemon: loading on port "+port);
70
71
72 this.controller=context.getController();
73 this.server=new ServerSocket(port);
74 this.thread=new Thread (this);
75 }
76
77 public void start() {
78
79 System.err.println("SimpleDaemon: starting");
80
81
82 this.thread.start();
83 }
84
85 public void stop()
86 throws IOException, InterruptedException {
87
88 System.err.println("SimpleDaemon: stopping");
89
90
91 this.stopping=true;
92 this.server.close();
93
94
95 this.thread.join(5000);
96 System.err.println("SimpleDaemon: stopped");
97 }
98
99 public void destroy() {
100 System.err.println("SimpleDaemon: instance "+this.hashCode()+
101 " destroy");
102 }
103
104 public void run() {
105 int number=0;
106
107 System.err.println("SimpleDaemon: started acceptor loop");
108 try {
109 while(!this.stopping) {
110 Socket socket=this.server.accept();
111 Handler handler=new Handler(socket,this,this.controller);
112 handler.setConnectionNumber(number++);
113 handler.setDirectoryName(this.directory);
114 new Thread (handler).start();
115 }
116 } catch (IOException e) {
117
119 if (!this.stopping) e.printStackTrace(System.err);
120 }
121
122
123 Enumeration openhandlers=this.handlers.elements();
124 while (openhandlers.hasMoreElements()) {
125 Handler handler=(Handler)openhandlers.nextElement();
126 System.err.println("SimpleDaemon: dropping connection "+
127 handler.getConnectionNumber());
128 handler.close();
129 }
130
131 System.err.println("SimpleDaemon: exiting acceptor loop");
132 }
133
134 protected void addHandler(Handler handler) {
135 synchronized (handler) {
136 this.handlers.add(handler);
137 }
138 }
139
140 protected void removeHandler(Handler handler) {
141 synchronized (handler) {
142 this.handlers.remove(handler);
143 }
144 }
145
146 public static class Handler implements Runnable {
147
148 private DaemonController controller=null;
149 private SimpleDaemon parent=null;
150 private String directory=null;
151 private Socket socket=null;
152 private int number=0;
153
154 public Handler(Socket s, SimpleDaemon p, DaemonController c) {
155 super();
156 this.socket=s;
157 this.parent=p;
158 this.controller=c;
159 }
160
161 public void run() {
162 this.parent.addHandler(this);
163 System.err.println("SimpleDaemon: connection "+this.number+
164 " opened from "+this.socket.getInetAddress());
165 try {
166 InputStream in=this.socket.getInputStream();
167 OutputStream out=this.socket.getOutputStream();
168 handle(in,out);
169 this.socket.close();
170 } catch (IOException e) {
171 e.printStackTrace(System.err);
172 }
173 System.err.println("SimpleDaemon: connection "+this.number+
174 " closed");
175 this.parent.removeHandler(this);
176 }
177
178 public void close() {
179 try {
180 this.socket.close();
181 } catch (IOException e) {
182 e.printStackTrace(System.err);
183 }
184 }
185
186 public void setConnectionNumber(int number) {
187 this.number=number;
188 }
189
190 public int getConnectionNumber() {
191 return(this.number);
192 }
193
194 public void setDirectoryName(String directory) {
195 this.directory=directory;
196 }
197
198 public String getDirectoryName() {
199 return(this.directory);
200 }
201
202 public void log(String name)
203 throws IOException {
204 OutputStream file=new FileOutputStream(name,true);
205 PrintStream out=new PrintStream(file);
206 SimpleDateFormat fmt=new SimpleDateFormat ();
207
208 out.println(fmt.format(new Date ()));
209 out.close();
210 file.close();
211 }
212
213 public void handle(InputStream in, OutputStream os) {
214 PrintStream out=new PrintStream(os);
215
216 while(true) {
217 try {
218
220 if (in.available()==0) {
221 out.println();
222 out.println("Please select one of the following:");
223 out.println(" 1) Shutdown");
224 out.println(" 2) Reload");
225 out.println(" 3) Create a file");
226 out.println(" 4) Disconnect");
227 out.print("Your choiche: ");
228 }
229
230
231 int x=in.read();
232
233 switch (x) {
234
235 case -1:
236 return;
237
238
239 case '1':
240 out.println("Attempting a shutdown...");
241 try {
242 this.controller.shutdown();
243 } catch (IllegalStateException e) {
244 out.println();
245 out.println("Can't shutdown now");
246 e.printStackTrace(out);
247 }
248 break;
249
250
251 case '2':
252 out.println("Attempting a reload...");
253 try {
254 this.controller.reload();
255 } catch (IllegalStateException e) {
256 out.println();
257 out.println("Can't reload now");
258 e.printStackTrace(out);
259 }
260 break;
261
262
263 case '3':
264 String name=this.getDirectoryName()+
265 "/SimpleDaemon."+
266 this.getConnectionNumber()+
267 ".tmp";
268 try {
269 this.log(name);
270 out.println("File '"+name+"' created");
271 } catch (IOException e) {
272 e.printStackTrace(out);
273 }
274 break;
275
276
277 case '4':
278 out.println("Disconnecting...");
279 return;
280
281
282 case '\r':
283 case '\n':
284 break;
285
286
287 default:
288 out.println("Unknown option '"+(char)x+"'");
289 break;
290
291 }
292
293
294 } catch (IOException e) {
295 System.err.println("SimpleDaemon: IOException in "+
296 "connection "+
297 this.getConnectionNumber());
298 return;
299 }
300 }
301 }
302 }
303 }
304
|
Popular Tags
|
Java API By Example, From Geeks To Geeks.