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17 package org.apache.logging.log4j.core.net;
18
19 import org.apache.logging.log4j.LogManager;
20 import org.apache.logging.log4j.Logger;
21 import org.apache.logging.log4j.core.AbstractServer;
22 import org.apache.logging.log4j.core.LogEvent;
23 import org.apache.logging.log4j.core.config.Configuration;
24 import org.apache.logging.log4j.core.config.ConfigurationFactory;
25 import org.apache.logging.log4j.core.config.XMLConfiguration;
26 import org.apache.logging.log4j.core.config.XMLConfigurationFactory;
27 import java.io.BufferedReader;
28 import java.io.EOFException;
29 import java.io.File;
30 import java.io.FileInputStream;
31 import java.io.FileNotFoundException;
32 import java.io.IOException;
33 import java.io.InputStreamReader;
34 import java.io.ObjectInputStream;
35 import java.io.OptionalDataException;
36 import java.net.MalformedURLException;
37 import java.net.ServerSocket;
38 import java.net.Socket;
39 import java.net.URI;
40 import java.net.URL;
41 import java.nio.charset.Charset;
42 import java.util.Map;
43 import java.util.concurrent.ConcurrentHashMap;
44 import java.util.concurrent.ConcurrentMap;
45
46
47
48
49 public class SocketServer extends AbstractServer implements Runnable {
50
51 private static Logger logger;
52
53 private static final int MAX_PORT = 65534;
54
55 private volatile boolean isActive = true;
56
57 private final ServerSocket server;
58
59 private final ConcurrentMap<Long, SocketHandler> handlers = new ConcurrentHashMap<Long, SocketHandler>();
60
61
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65
66 public SocketServer(final int port) throws IOException {
67 server = new ServerSocket(port);
68 if (logger == null) {
69 logger = LogManager.getLogger(this);
70
71 }
72 }
73
74
75
76
77
78 public static void main(final String[] args) throws Exception {
79 if (args.length < 1 || args.length > 2) {
80 System.err.println("Incorrect number of arguments");
81 printUsage();
82 return;
83 }
84 final int port = Integer.parseInt(args[0]);
85 if (port <= 0 || port >= MAX_PORT) {
86 System.err.println("Invalid port number");
87 printUsage();
88 return;
89 }
90 if (args.length == 2 && args[1].length() > 0) {
91 ConfigurationFactory.setConfigurationFactory(new ServerConfigurationFactory(args[1]));
92 }
93 logger = LogManager.getLogger(SocketServer.class.getName());
94 final SocketServer sserver = new SocketServer(port);
95 final Thread server = new Thread(sserver);
96 server.start();
97 final Charset enc = Charset.defaultCharset();
98 final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in, enc));
99 while (true) {
100 final String line = reader.readLine();
101 if (line.equalsIgnoreCase("Quit") || line.equalsIgnoreCase("Stop") || line.equalsIgnoreCase("Exit")) {
102 sserver.shutdown();
103 server.join();
104 break;
105 }
106 }
107 }
108
109 private static void printUsage() {
110 System.out.println("Usage: ServerSocket port configFilePath");
111 }
112
113
114
115
116 public void shutdown() {
117 this.isActive = false;
118 Thread.currentThread().interrupt();
119 }
120
121
122
123
124 @Override
125 public void run() {
126 while (isActive) {
127 try {
128
129 final Socket clientSocket = server.accept();
130 clientSocket.setSoLinger(true, 0);
131
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134
135
136 final SocketHandler handler = new SocketHandler(clientSocket);
137 handlers.put(handler.getId(), handler);
138 handler.start();
139 } catch (final IOException ioe) {
140 System.out.println("Exception encountered on accept. Ignoring. Stack Trace :");
141 ioe.printStackTrace();
142 }
143 }
144 for (final Map.Entry<Long, SocketHandler> entry : handlers.entrySet()) {
145 final SocketHandler handler = entry.getValue();
146 handler.shutdown();
147 try {
148 handler.join();
149 } catch (final InterruptedException ie) {
150
151 }
152 }
153 }
154
155
156
157
158 private class SocketHandler extends Thread {
159 private final ObjectInputStream ois;
160
161 private boolean shutdown = false;
162
163 public SocketHandler(final Socket socket) throws IOException {
164
165 ois = new ObjectInputStream(socket.getInputStream());
166 }
167
168 public void shutdown() {
169 this.shutdown = true;
170 interrupt();
171 }
172
173 @Override
174 public void run() {
175 boolean closed = false;
176 try {
177 try {
178 while (!shutdown) {
179 final LogEvent event = (LogEvent) ois.readObject();
180 if (event != null) {
181 log(event);
182 }
183 }
184 } catch (final EOFException eof) {
185 closed = true;
186 } catch (final OptionalDataException opt) {
187 logger.error("OptionalDataException eof=" + opt.eof + " length=" + opt.length, opt);
188 } catch (final ClassNotFoundException cnfe) {
189 logger.error("Unable to locate LogEvent class", cnfe);
190 } catch (final IOException ioe) {
191 logger.error("IOException encountered while reading from socket", ioe);
192 }
193 if (!closed) {
194 try {
195 ois.close();
196 } catch (final Exception ex) {
197
198 }
199 }
200 } finally {
201 handlers.remove(getId());
202 }
203 }
204 }
205
206
207
208
209 private static class ServerConfigurationFactory extends XMLConfigurationFactory {
210
211 private final String path;
212
213 public ServerConfigurationFactory(final String path) {
214 this.path = path;
215 }
216
217 @Override
218 public Configuration getConfiguration(final String name, final URI configLocation) {
219 if (path != null && path.length() > 0) {
220 File file = null;
221 ConfigurationSource source = null;
222 try {
223 file = new File(path);
224 final FileInputStream is = new FileInputStream(file);
225 source = new ConfigurationSource(is, file);
226 } catch (final FileNotFoundException ex) {
227
228 }
229 if (source == null) {
230 try {
231 final URL url = new URL(path);
232 source = new ConfigurationSource(url.openStream(), path);
233 } catch (final MalformedURLException mue) {
234
235 } catch (final IOException ioe) {
236
237 }
238 }
239
240 try {
241 if (source != null) {
242 return new XMLConfiguration(source);
243 }
244 } catch (final Exception ex) {
245
246 }
247 System.err.println("Unable to process configuration at " + path + ", using default.");
248 }
249 return super.getConfiguration(name, configLocation);
250 }
251 }
252 }