1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/**
* ProxyClient: Ivy relay, first attempt
*
* @author Yannick Jestin
* @author <a href="http://www.tls.cena.fr/products/ivy/">http://www.tls.cena.fr/products/ivy/</a>
*
* (c) ENAC
*
* changelog:
* 1.2.12
*/
package fr.dgac.ivy ;
import java.io.*;
import java.net.*;
import java.util.* ;
import gnu.getopt.Getopt;
import org.apache.regexp.*;
public class ProxyClient extends Ivy {
private Socket clientSocket;
private PrintWriter out;
private BufferedReader in;
private boolean isRunning=false;
private static boolean debug = (System.getProperty("IVY_DEBUG")!=null) ;
private volatile Thread clientThread;// volatile to ensure the quick communication
private Hashtable id=new Hashtable();
private Vector ghosts = new Vector();
private Hashtable puppets =new Hashtable(); // key=id value=Puppet
String domain=null;
public static int DEFAULT_SERVICE_PORT = 3456 ;
public static final String DEFAULTNAME = "ProxyClient";
public static final String helpmsg = "usage: java fr.dgac.ivy.ProxyClient [options] hostname\n\t-b BUS\tspecifies the Ivy bus domain\n\t-p\tport number, default "+DEFAULT_SERVICE_PORT+"\n\t-n ivyname (default "+DEFAULTNAME+")\n\t-q\tquiet, no tty output\n\t-d\tdebug\n\t-h\thelp\ncontacts the ProxyMaster on hostname\n";
private static String name = DEFAULTNAME;
public static void main(String[] args) {
Ivy bus;
Getopt opt = new Getopt("ProxyClient",args,"n:b:dqp:h");
int c;
int servicePort = DEFAULT_SERVICE_PORT;
boolean quiet = false;
String domain=Ivy.getDomain(null);
while ((c = opt.getopt()) != -1) switch (c) {
case 'n':
name=opt.getOptarg();
break;
case 'b':
domain=opt.getOptarg();
break;
case 'q':
quiet=true;
break;
case 'd':
Properties sysProp = System.getProperties();
sysProp.put("IVY_DEBUG","yes");
break;
case 'p':
String s="";
try {
servicePort = Integer.parseInt(s=opt.getOptarg());
} catch (NumberFormatException nfe) {
System.out.println("Invalid port number: " + s );
System.exit(0);
}
break;
case 'h':
default:
System.out.println(helpmsg);
System.exit(0);
}
String hostname="localhost";
try {
ProxyClient pc = new ProxyClient(hostname,servicePort,domain);
if (!quiet) System.out.println("broadcasting on "+pc.domains(domain));
if (!quiet) System.out.println("contacting tcp:"+hostname+":"+servicePort);
System.out.println("client running...");
} catch (IvyException ie) {
System.out.println("error, can't connect to Ivy");
ie.printStackTrace();
System.exit(-1);
} catch (IOException ioe) {
System.out.println("error, can't connect to the proxy master");
ioe.printStackTrace();
System.exit(-1);
}
}
public ProxyClient(String hostname,int servicePort,String domain) throws IOException, IvyException {
super(name,name+" ready",null);
clientSocket = new Socket(hostname,servicePort) ;
in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(clientSocket.getOutputStream()));
clientThread=new Thread(new Servicer());
clientThread.start();
this.domain=domain;
start(domain);
}
RE getId=new RE("^ID id=(.*) value=(.*)");
RE fwd=new RE("^Forward id=(.*) buffer=(.*)");
RE puppetRe=new RE("^CreatePuppet id=(.*)");
void parseMsg(String msg) {
System.out.println("parsing "+msg);
if (getId.match(msg)) {
id.put(getId.getParen(1),getId.getParen(2));
} else if (puppetRe.match(msg)) {
// I must create a puppet
puppets.put(puppetRe.getParen(1),new Puppet(this,domain));
} else if (fwd.match(msg)) {
// received a forward request
// TODO give it to the puppet
Puppet p = (Puppet)puppets.get(fwd.getParen(1));
p.parse(fwd.getParen(2));
} else {
System.out.println("unknown message "+msg);
}
}
void removePuppet(Puppet p){puppets.remove(p);}
class Servicer implements Runnable {
public void run() {
Thread thisThread = Thread.currentThread();
traceDebug("Thread started");
String msg = null;
try {
while (true) {
msg=in.readLine();
if (msg==null) break;
parseMsg(msg);
}
} catch (IOException ioe) {
traceDebug("Subreader exception ...");
ioe.printStackTrace();
System.exit(0);
}
traceDebug("Subreader Thread stopped");
System.out.println("ProxyClient disconnected");
stop(); // leave the bus TODO: make a disconnexion/reconnexion possible ?
}
}
/*
* here, I create a ghost instead of a normal Ivy Client, to catch the
* protocol and forward everything to the proxies.
* TODO: remember everything in case a new proxy client comes ?
*/
protected IvyClient createIvyClient(Socket s,int port, boolean domachin) throws IOException {
String key = getWBUId();
System.out.println("asking for a key");
out.println("GetID id="+key); // asks a centralized ID from ProxyMaster
out.flush();
try { // waits for the answer
while (id.get(key)==null) { Thread.sleep(200); }
} catch (InterruptedException ie) {
ie.printStackTrace();
}
System.out.println("key received");
return new Ghost(this,s,port,domachin,(String)id.get(key),this);
}
/*
* the function to forward the protocol to all the Puppets through the
* ProxyMaster
*
*/
protected void forward(String id,String buffer) {
out.println("Forward id="+id+" buffer="+buffer);
out.flush();
}
private static void traceDebug(String s){
if (debug) System.out.println("-->ProxyClient "+name+"<-- "+s);
}
}
|
