práctica 3, falta la última parte

es/um/redes/nanoFiles/application/Directory.java

@@ -0,0 +1,97 @@
+package es.um.redes.nanoFiles.application;
+
+import java.io.IOException;
+import java.net.BindException;
+import java.net.SocketException;
+
+import es.um.redes.nanoFiles.udp.server.NFDirectoryServer;
+
+public class Directory {
+	public static final double DEFAULT_CORRUPTION_PROBABILITY = 0.0;
+	public static final String DEFAULT_DIRECTORY_FILES_PATH = "dir-shared";
+
+	public static void main(String[] args) {
+		double datagramCorruptionProbability = DEFAULT_CORRUPTION_PROBABILITY;
+		String directoryFilesPath = DEFAULT_DIRECTORY_FILES_PATH;
+
+		/**
+		 * Command line argument to directory is optional, if not specified, default
+		 * value is used: -loss: probability of corruption of received datagrams
+		 */
+		String arg;
+
+		int i = 0;
+		while (i < args.length) {
+			arg = args[i];
+			if (!arg.startsWith("-")) {
+				System.err.println("Illegal argument " + arg);
+				return;
+			}
+			if (arg.equals("-loss")) {
+				if (i + 1 < args.length) {
+					try {
+						datagramCorruptionProbability = Double.parseDouble(args[i + 1]);
+					} catch (NumberFormatException e) {
+						System.err.println("Wrong value passed to option " + arg);
+						return;
+					}
+					i += 2;
+				} else {
+					System.err.println("option " + arg + " requires a value");
+					return;
+				}
+			} else if (arg.equals("-dir")) {
+				if (i + 1 < args.length) {
+					directoryFilesPath = args[i + 1];
+					i += 2;
+				} else {
+					System.err.println("option " + arg + " requires a value");
+					return;
+				}
+			} else {
+				System.err.println("Illegal option " + arg);
+				return;
+			}
+		}
+		System.out.println("Probability of corruption for received datagrams: " + datagramCorruptionProbability);
+		System.out.println("Directory files path: " + directoryFilesPath);
+		NFDirectoryServer dir = null;
+		try {
+			dir = new NFDirectoryServer(datagramCorruptionProbability, directoryFilesPath);
+		} catch (SocketException e) {
+			if (isBindFailure(e)) {
+				System.err.println("Directory cannot create UDP socket");
+				System.err.println("Most likely a Directory process is already running and listening on that port...");
+			} else {
+				System.err.println("Directory failed to initialize UDP socket: " + e.getMessage());
+				e.printStackTrace();
+			}
+			System.exit(-1);
+		}
+		try {
+			if (NanoFiles.testModeUDP) {
+				dir.runTest();
+			} else {
+				dir.run();
+			}
+		} catch (SocketException e) {
+			System.err.println("Socket error while running directory: " + e.getMessage());
+			e.printStackTrace();
+			System.exit(-1);
+		} catch (IOException e) {
+			e.printStackTrace();
+			System.err.println("Unexpected I/O error when running NFDirectoryServer.run");
+			System.exit(-1);
+		}
+
+	}
+
+	private static boolean isBindFailure(SocketException e) {
+		if (e instanceof BindException) {
+			return true;
+		}
+		String msg = e.getMessage();
+		return msg != null && msg.toLowerCase().contains("address already in use");
+	}
+
+}