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
|
/**
* This file is part of the CRISTAL-iSE kernel.
* Copyright (c) 2001-2014 The CRISTAL Consortium. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* http://www.fsf.org/licensing/licenses/lgpl.html
*/
package org.cristalise.kernel.entity.proxy;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.InterruptedIOException;
import java.io.PrintWriter;
import java.net.Socket;
import org.cristalise.kernel.common.InvalidDataException;
import org.cristalise.kernel.utils.Logger;
public class ProxyServerConnection extends Thread
{
public boolean serverIsActive = true;
// proxy client details
String serverName;
int serverPort;
Socket serverConnection;
ProxyManager manager;
// for talking to the proxy server
PrintWriter serverStream;
boolean listening = false;
static boolean isServer = false;
/**
* Create an entity proxy manager to listen for proxy events and reap unused proxies
*/
public ProxyServerConnection(String host, int port, ProxyManager manager)
{
Logger.msg(5, "ProxyServerConnection - Initialising connection to "+host+":"+port);
serverName = host;
serverPort = port;
this.manager = manager;
listening = true;
start();
}
@Override
public void run() {
Thread.currentThread().setName("Proxy Client Connection Listener to "+serverName+":"+serverPort);
while (listening) {
try {
if (serverConnection == null) connect();
if (serverConnection != null) {
BufferedReader request = new BufferedReader(new InputStreamReader(serverConnection.getInputStream()));
String input = null;
ProxyMessage thisMessage;
while (listening && serverConnection != null) {
try {
input = request.readLine();
thisMessage = new ProxyMessage(input);
thisMessage.setServer(serverName);
manager.processMessage(thisMessage);
} catch (InterruptedIOException ex) { // timeout - send a ping
sendMessage(ProxyMessage.pingMessage);
} catch (InvalidDataException ex) { // invalid proxy message
if (input != null)
Logger.error("EntityProxyManager - Invalid proxy message: "+input);
}
}
}
} catch (IOException ex) {
Logger.error("ProxyServerConnection - Disconnected from "+serverName+":"+serverPort);
try {
serverStream.close();
serverConnection.close();
} catch (IOException e1) { }
serverStream = null;
serverConnection = null;
}
}
if (serverStream != null) {
try {
Logger.msg(1, "Disconnecting from proxy server on "+serverName+":"+serverPort);
serverStream.println(ProxyMessage.byeMessage.toString());
serverStream.close();
serverConnection.close();
serverConnection = null;
} catch (Exception e) {
Logger.error("Error disconnecting from proxy server.");
}
}
}
public void connect() {
Logger.msg(3, "ProxyServerConnection - connecting to proxy server on "+serverName+":"+serverPort);
try {
serverConnection = new Socket(serverName, serverPort);
serverConnection.setKeepAlive(true);
serverIsActive = true;
serverConnection.setSoTimeout(5000);
serverStream = new PrintWriter(serverConnection.getOutputStream(), true);
Logger.msg("Connected to proxy server on "+serverName+":"+serverPort);
manager.resubscribe(this);
} catch (Exception e) {
Logger.msg(3, "Could not connect to proxy server. Retrying in 5s");
try { Thread.sleep(5000); } catch (InterruptedException ex) { }
serverStream = null;
serverConnection = null;
serverIsActive = false;
}
}
public void shutdown() {
Logger.msg("Proxy Client: flagging shutdown.");
listening = false;
}
/**
* @param sub
*/
public void sendMessage(ProxyMessage sub) {
if (serverStream != null)
serverStream.println(sub);
}
}
|
