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Java > Open Source Codes > groovy > ui > GroovySocketServer


1 /*
2  $Id: GroovySocketServer.java,v 1.7 2005/06/10 14:05:02 cstein Exp $
3
4  Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
5
6  Redistribution and use of this software and associated documentation
7  ("Software"), with or without modification, are permitted provided
8  that the following conditions are met:
9
10  1. Redistributions of source code must retain copyright
11     statements and notices. Redistributions must also contain a
12     copy of this document.
13
14  2. Redistributions in binary form must reproduce the
15     above copyright notice, this list of conditions and the
16     following disclaimer in the documentation and/or other
17     materials provided with the distribution.
18
19  3. The name "groovy" must not be used to endorse or promote
20     products derived from this Software without prior written
21     permission of The Codehaus. For written permission,
22     please contact info@codehaus.org.
23
24  4. Products derived from this Software may not be called "groovy"
25     nor may "groovy" appear in their names without prior written
26     permission of The Codehaus. "groovy" is a registered
27     trademark of The Codehaus.
28
29  5. Due credit should be given to The Codehaus -
30     http://groovy.codehaus.org/
31
32  THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
33  ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
34  NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
35  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
36  THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43  OF THE POSSIBILITY OF SUCH DAMAGE.
44
45  */

46 package groovy.ui;
47
48 import groovy.lang.GroovyShell;
49 import groovy.lang.Script;
50
51 import java.io.BufferedReader JavaDoc;
52 import java.io.FileInputStream JavaDoc;
53 import java.io.IOException JavaDoc;
54 import java.io.InputStreamReader JavaDoc;
55 import java.io.PrintWriter JavaDoc;
56 import java.net.InetAddress JavaDoc;
57 import java.net.ServerSocket JavaDoc;
58 import java.net.Socket JavaDoc;
59 import java.net.URL JavaDoc;
60
61 /**
62  * Simple server that executes supplied script against a socket
63  * @author Jeremy Rayner
64  */

65
66 public class GroovySocketServer implements Runnable JavaDoc {
67     private URL JavaDoc url;
68     private GroovyShell groovy;
69     private boolean isScriptFile;
70     private String JavaDoc scriptFilenameOrText;
71     private boolean autoOutput;
72     
73     public GroovySocketServer(GroovyShell groovy, boolean isScriptFile, String JavaDoc scriptFilenameOrText, boolean autoOutput, int port) {
74         this.groovy = groovy;
75         this.isScriptFile = isScriptFile;
76         this.scriptFilenameOrText = scriptFilenameOrText;
77         this.autoOutput = autoOutput;
78         try {
79             url = new URL JavaDoc("http", InetAddress.getLocalHost().getHostAddress(), port, "/");
80             System.out.println("groovy is listening on port " + port);
81         } catch (IOException JavaDoc e) {
82             e.printStackTrace();
83         }
84         new Thread JavaDoc(this).start();
85     }
86
87     public void run() {
88         try {
89             ServerSocket JavaDoc serverSocket = new ServerSocket JavaDoc(url.getPort());
90             while (true) {
91                 // Create one script per socket connection.
92
// This is purposefully not caching the Script
93
// so that the script source file can be changed on the fly,
94
// as each connection is made to the server.
95
Script script;
96                 if (isScriptFile) {
97                     GroovyMain gm = new GroovyMain();
98                     script = groovy.parse(new FileInputStream JavaDoc(gm.huntForTheScriptFile(scriptFilenameOrText)));
99                 } else {
100                     script = groovy.parse(scriptFilenameOrText);
101                 }
102                 new GroovyClientConnection(script, autoOutput, serverSocket.accept());
103             }
104         } catch (Exception JavaDoc e) {
105             e.printStackTrace();
106         }
107     }
108     
109     class GroovyClientConnection implements Runnable JavaDoc {
110         private Script script;
111         private Socket JavaDoc socket;
112         private BufferedReader JavaDoc reader;
113         private PrintWriter JavaDoc writer;
114         private boolean autoOutputFlag;
115     
116         GroovyClientConnection(Script script, boolean autoOutput,Socket JavaDoc socket) throws IOException JavaDoc {
117             this.script = script;
118             this.autoOutputFlag = autoOutput;
119             this.socket = socket;
120             reader = new BufferedReader JavaDoc(new InputStreamReader JavaDoc(socket.getInputStream()));
121             writer = new PrintWriter JavaDoc(socket.getOutputStream());
122             new Thread JavaDoc(this, "Groovy client connection - " + socket.getInetAddress().getHostAddress()).start();
123         }
124         public void run() {
125             try {
126                 String JavaDoc line = null;
127                 script.setProperty("out", writer);
128                 script.setProperty("socket", socket);
129                 script.setProperty("init", Boolean.TRUE);
130                 while ((line = reader.readLine()) != null) {
131                     // System.out.println(line);
132
script.setProperty("line", line);
133                     Object JavaDoc o = script.run();
134                     script.setProperty("init", Boolean.FALSE);
135                     if (o != null) {
136                         if ("success".equals(o)) {
137                             break; // to close sockets gracefully etc...
138
} else {
139                             if (autoOutputFlag) {
140                                 writer.println(o);
141                             }
142                         }
143                     }
144                     writer.flush();
145                 }
146             } catch (IOException JavaDoc e) {
147                 e.printStackTrace();
148             } finally {
149                 try {
150                     writer.flush();
151                     writer.close();
152                 } finally {
153                     try {
154                         socket.close();
155                     } catch (IOException JavaDoc e3) {
156                         e3.printStackTrace();
157                     }
158                 }
159             }
160         }
161     }
162 }
163
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