Source Code Cross Referenced for NGSession.java in  » Net » NailGun » com » martiansoftware » nailgun » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Java Source Code / Java Documentation
1. 6.0 JDK Core
2. 6.0 JDK Modules
3. 6.0 JDK Modules com.sun
4. 6.0 JDK Modules com.sun.java
5. 6.0 JDK Modules sun
6. 6.0 JDK Platform
7. Ajax
8. Apache Harmony Java SE
9. Aspect oriented
10. Authentication Authorization
11. Blogger System
12. Build
13. Byte Code
14. Cache
15. Chart
16. Chat
17. Code Analyzer
18. Collaboration
19. Content Management System
20. Database Client
21. Database DBMS
22. Database JDBC Connection Pool
23. Database ORM
24. Development
25. EJB Server geronimo
26. EJB Server GlassFish
27. EJB Server JBoss 4.2.1
28. EJB Server resin 3.1.5
29. ERP CRM Financial
30. ESB
31. Forum
32. GIS
33. Graphic Library
34. Groupware
35. HTML Parser
36. IDE
37. IDE Eclipse
38. IDE Netbeans
39. Installer
40. Internationalization Localization
41. Inversion of Control
42. Issue Tracking
43. J2EE
44. JBoss
45. JMS
46. JMX
47. Library
48. Mail Clients
49. Net
50. Parser
51. PDF
52. Portal
53. Profiler
54. Project Management
55. Report
56. RSS RDF
57. Rule Engine
58. Science
59. Scripting
60. Search Engine
61. Security
62. Sevlet Container
63. Source Control
64. Swing Library
65. Template Engine
66. Test Coverage
67. Testing
68. UML
69. Web Crawler
70. Web Framework
71. Web Mail
72. Web Server
73. Web Services
74. Web Services apache cxf 2.0.1
75. Web Services AXIS2
76. Wiki Engine
77. Workflow Engines
78. XML
79. XML UI
Java
Java Tutorial
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Java Source Code / Java Documentation » Net » NailGun » com.martiansoftware.nailgun 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*   
002:
003:          Copyright 2004, Martian Software, Inc.
004:
005:          Licensed under the Apache License, Version 2.0 (the "License");
006:          you may not use this file except in compliance with the License.
007:          You may obtain a copy of the License at
008:
009:          http://www.apache.org/licenses/LICENSE-2.0
010:
011:          Unless required by applicable law or agreed to in writing, software
012:          distributed under the License is distributed on an "AS IS" BASIS,
013:          WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:          See the License for the specific language governing permissions and
015:          limitations under the License.
016:
017:         */
018:
019:        package com.martiansoftware.nailgun;
020:
021:        import java.io.InputStream;
022:        import java.io.PrintStream;
023:        import java.lang.reflect.InvocationTargetException;
024:        import java.lang.reflect.Method;
025:        import java.net.Socket;
026:        import java.util.List;
027:        import java.util.Properties;
028:
029:        import org.apache.tools.ant.ExitException;
030:
031:        /**
032:         * Reads the NailGun stream from the client through the command,
033:         * then hands off processing to the appropriate class.  The NGSession
034:         * obtains its sockets from an NGSessionPool, which created this
035:         * NGSession.
036:         * 
037:         * @author <a href="http://www.martiansoftware.com/contact.html">Marty Lamb</a>
038:         */
039:        class NGSession extends Thread {
040:
041:            /**
042:             * The server this NGSession is working for
043:             */
044:            private NGServer server = null;
045:
046:            /**
047:             * The pool this NGSession came from, and to which it will
048:             * return itself
049:             */
050:            private NGSessionPool sessionPool = null;
051:
052:            /**
053:             * Synchronization object
054:             */
055:            private Object lock = new Object();
056:
057:            /**
058:             * The next socket this NGSession has been tasked with processing
059:             * (by NGServer)
060:             */
061:            private Socket nextSocket = null;
062:
063:            /**
064:             * True if the server has been shutdown and this NGSession should
065:             * terminate completely
066:             */
067:            private boolean done = false;
068:
069:            /**
070:             * The instance number of this NGSession.  That is, if this is the Nth
071:             * NGSession to be created, then this is the value for N.
072:             */
073:            private long instanceNumber = 0;
074:
075:            /**
076:             * A lock shared among all NGSessions
077:             */
078:            private static Object sharedLock = new Object();
079:
080:            /**
081:             * The instance counter shared among all NGSessions
082:             */
083:            private static long instanceCounter = 0;
084:
085:            /**
086:             * signature of main(String[]) for reflection operations
087:             */
088:            private static Class[] mainSignature;
089:
090:            /**
091:             * signature of nailMain(NGContext) for reflection operations
092:             */
093:            private static Class[] nailMainSignature;
094:
095:            static {
096:                // initialize the signatures
097:                mainSignature = new Class[1];
098:                mainSignature[0] = String[].class;
099:
100:                nailMainSignature = new Class[1];
101:                nailMainSignature[0] = NGContext.class;
102:            }
103:
104:            /**
105:             * Creates a new NGSession running for the specified NGSessionPool and
106:             * NGServer.
107:             * @param sessionPool The NGSessionPool we're working for
108:             * @param server The NGServer we're working for
109:             */
110:            NGSession(NGSessionPool sessionPool, NGServer server) {
111:                super ();
112:                this .sessionPool = sessionPool;
113:                this .server = server;
114:
115:                synchronized (sharedLock) {
116:                    this .instanceNumber = ++instanceCounter;
117:                }
118:                //		server.out.println("Created NGSession " + instanceNumber);
119:            }
120:
121:            /**
122:             * Shuts down this NGSession gracefully
123:             */
124:            void shutdown() {
125:                done = true;
126:                synchronized (lock) {
127:                    nextSocket = null;
128:                    lock.notifyAll();
129:                }
130:            }
131:
132:            /**
133:             * Instructs this NGSession to process the specified socket, after which
134:             * this NGSession will return itself to the pool from which it came.
135:             * @param socket the socket (connected to a client) to process
136:             */
137:            public void run(Socket socket) {
138:                synchronized (lock) {
139:                    nextSocket = socket;
140:                    lock.notify();
141:                }
142:                Thread.yield();
143:            }
144:
145:            /**
146:             * Returns the next socket to process.  This will block the NGSession
147:             * thread until there's a socket to process or the NGSession has been
148:             * shut down.
149:             * 
150:             * @return the next socket to process, or <code>null</code> if the NGSession
151:             * has been shut down.
152:             */
153:            private Socket nextSocket() {
154:                Socket result = null;
155:                synchronized (lock) {
156:                    result = nextSocket;
157:                    while (!done && result == null) {
158:                        try {
159:                            lock.wait();
160:                        } catch (InterruptedException e) {
161:                            done = true;
162:                        }
163:                        result = nextSocket;
164:                    }
165:                    nextSocket = null;
166:                }
167:                return (result);
168:            }
169:
170:            /**
171:             * The main NGSession loop.  This gets the next socket to process, runs
172:             * the nail for the socket, and loops until shut down.
173:             */
174:            public void run() {
175:
176:                updateThreadName(null);
177:
178:                Socket socket = nextSocket();
179:                while (socket != null) {
180:                    try {
181:                        // buffer for reading headers
182:                        byte[] lbuf = new byte[5];
183:                        java.io.DataInputStream sockin = new java.io.DataInputStream(
184:                                socket.getInputStream());
185:                        java.io.OutputStream sockout = socket.getOutputStream();
186:
187:                        // client info - command line arguments and environment
188:                        List remoteArgs = new java.util.ArrayList();
189:                        Properties remoteEnv = new Properties();
190:
191:                        String cwd = null; // working directory
192:                        String command = null; // alias or class name
193:
194:                        // read everything from the client up to and including the command
195:                        while (command == null) {
196:                            sockin.readFully(lbuf);
197:                            long bytesToRead = LongUtils.fromArray(lbuf, 0);
198:                            char chunkType = (char) lbuf[4];
199:
200:                            byte[] b = new byte[(int) bytesToRead];
201:                            sockin.readFully(b);
202:                            String line = new String(b, "US-ASCII");
203:
204:                            switch (chunkType) {
205:
206:                            case NGConstants.CHUNKTYPE_ARGUMENT:
207:                                //	command line argument
208:                                remoteArgs.add(line);
209:                                break;
210:
211:                            case NGConstants.CHUNKTYPE_ENVIRONMENT:
212:                                //	parse environment into property
213:                                int equalsIndex = line.indexOf('=');
214:                                if (equalsIndex > 0) {
215:                                    remoteEnv.setProperty(line.substring(0,
216:                                            equalsIndex), line
217:                                            .substring(equalsIndex + 1));
218:                                }
219:                                String key = line.substring(0, equalsIndex);
220:                                break;
221:
222:                            case NGConstants.CHUNKTYPE_COMMAND:
223:                                // 	command (alias or classname)
224:                                command = line;
225:                                break;
226:
227:                            case NGConstants.CHUNKTYPE_WORKINGDIRECTORY:
228:                                //	client working directory
229:                                cwd = line;
230:                                break;
231:
232:                            default: // freakout?
233:                            }
234:                        }
235:
236:                        updateThreadName(socket.getInetAddress()
237:                                .getHostAddress()
238:                                + ": " + command);
239:
240:                        // can't create NGInputStream until we've received a command, because at
241:                        // that point the stream from the client will only include stdin and stdin-eof
242:                        // chunks
243:                        InputStream in = new NGInputStream(sockin);
244:                        PrintStream out = new PrintStream(new NGOutputStream(
245:                                sockout, NGConstants.CHUNKTYPE_STDOUT));
246:                        PrintStream err = new PrintStream(new NGOutputStream(
247:                                sockout, NGConstants.CHUNKTYPE_STDERR));
248:                        PrintStream exit = new PrintStream(new NGOutputStream(
249:                                sockout, NGConstants.CHUNKTYPE_EXIT));
250:
251:                        // ThreadLocal streams for System.in/out/err redirection
252:                        ((ThreadLocalInputStream) System.in).init(in);
253:                        ((ThreadLocalPrintStream) System.out).init(out);
254:                        ((ThreadLocalPrintStream) System.err).init(err);
255:
256:                        try {
257:                            Alias alias = server.getAliasManager().getAlias(
258:                                    command);
259:                            Class cmdclass = null;
260:                            if (alias != null) {
261:                                cmdclass = alias.getAliasedClass();
262:                            } else if (server.allowsNailsByClassName()) {
263:                                cmdclass = Class.forName(command);
264:                            } else {
265:                                cmdclass = server.getDefaultNailClass();
266:                            }
267:
268:                            Object[] methodArgs = new Object[1];
269:                            Method mainMethod = null; // will be either main(String[]) or nailMain(NGContext)
270:                            String[] cmdlineArgs = (String[]) remoteArgs
271:                                    .toArray(new String[remoteArgs.size()]);
272:
273:                            try {
274:                                mainMethod = cmdclass.getMethod("nailMain",
275:                                        nailMainSignature);
276:                                NGContext context = new NGContext();
277:                                context.setArgs(cmdlineArgs);
278:                                context.in = in;
279:                                context.out = out;
280:                                context.err = err;
281:                                context.setCommand(command);
282:                                context.setExitStream(exit);
283:                                context.setNGServer(server);
284:                                context.setEnv(remoteEnv);
285:                                context.setInetAddress(socket.getInetAddress());
286:                                context.setPort(socket.getPort());
287:                                context.setWorkingDirectory(cwd);
288:                                methodArgs[0] = context;
289:                            } catch (NoSuchMethodException toDiscard) {
290:                                // that's ok - we'll just try main(String[]) next.
291:                            }
292:
293:                            if (mainMethod == null) {
294:                                mainMethod = cmdclass.getMethod("main",
295:                                        mainSignature);
296:                                methodArgs[0] = cmdlineArgs;
297:                            }
298:
299:                            if (mainMethod != null) {
300:                                server.nailStarted(cmdclass);
301:                                NGSecurityManager.setExit(exit);
302:
303:                                try {
304:                                    mainMethod.invoke(null, methodArgs);
305:                                } catch (InvocationTargetException ite) {
306:                                    throw (ite.getCause());
307:                                } catch (Throwable t) {
308:                                    throw (t);
309:                                } finally {
310:                                    server.nailFinished(cmdclass);
311:                                }
312:                                exit.println(0);
313:                            }
314:
315:                        } catch (ExitException exitEx) {
316:                            exit.println(exitEx.getStatus());
317:                            server.out.println(Thread.currentThread().getName()
318:                                    + " exited with status "
319:                                    + exitEx.getStatus());
320:                        } catch (Throwable t) {
321:                            t.printStackTrace();
322:                            exit.println(NGConstants.EXIT_EXCEPTION); // remote exception constant
323:                        }
324:
325:                        socket.close();
326:
327:                    } catch (Throwable t) {
328:                        t.printStackTrace();
329:                    }
330:
331:                    ((ThreadLocalInputStream) System.in).init(null);
332:                    ((ThreadLocalPrintStream) System.out).init(null);
333:                    ((ThreadLocalPrintStream) System.err).init(null);
334:
335:                    updateThreadName(null);
336:                    sessionPool.give(this );
337:                    socket = nextSocket();
338:                }
339:
340:                //		server.out.println("Shutdown NGSession " + instanceNumber);
341:            }
342:
343:            /**
344:             * Updates the current thread name (useful for debugging).
345:             */
346:            private void updateThreadName(String detail) {
347:                setName("NGSession " + instanceNumber + ": "
348:                        + ((detail == null) ? "(idle)" : detail));
349:            }
350:        }
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.