Jenkinsfile

@@ -14,6 +14,9 @@
             sh 'echo "BUILDING TRACKER"'
             sh 'echo Main-Class: tracker/Tracker > MANIFEST.MF'
             sh 'jar -cvmf MANIFEST.MF tracker.jar $(find bin/ -maxdepth 1 -mindepth 1 -printf "-C bin %f\n")'
+            sh 'echo "BUILDING CLIENT GUI"'
+            sh 'echo Main-Class: gui/Gui > MANIFEST.MF'
+            sh 'jar -cvmf MANIFEST.MF clientGUI.jar $(find bin/ -maxdepth 1 -mindepth 1 -printf "-C bin %f\n")'
             sh 'echo "CREATING sources.tar.gz"'
             sh 'tar -zcvf sources.tar.gz src/'
           }
@@ -29,6 +32,7 @@
           archiveArtifacts artifacts: 'client.jar', fingerprint: true
           archiveArtifacts artifacts: 'server.jar', fingerprint: true
           archiveArtifacts artifacts: 'tracker.jar', fingerprint: true
+          archiveArtifacts artifacts: 'clientGUI.jar', fingerprint:true
           archiveArtifacts artifacts: 'sources.tar.gz', fingerprint: true
         }
       }

src/clientP2P/ClientInterface.java

@@ -0,0 +1,41 @@
+package clientP2P;
+import clientP2P.ClientManagement;
+import tools.Logger;
+import tools.LogLevel;
+
+/** Implementation of P2P-JAVA-PROJECT CLIENT interface
+ * @author	Louis Royer
+ * @author	Flavien Haas
+ * @author	JS Auge
+ * @version	1.0
+ */
+public abstract class ClientInterface implements Runnable {
+	protected ClientManagement clientManagement;
+	private Logger logger;
+
+	/** Constructor with clientManagement and logger.
+	 * @param clientManagement	ClientManagement used
+	 * @param logger	Logger used
+	 */
+	public ClientInterface(ClientManagement clientManagement, Logger logger) {
+		this.clientManagement = clientManagement;
+		this.logger = logger;
+	}
+
+	/** Implementation of writeLog
+	 * @param text	Text to log
+	 * @param logLevel	level of logging
+	 */
+	protected void writeLog(String text, LogLevel logLevel) {
+		logger.write(text, logLevel);
+	}
+
+	/** Implementation of writeLog
+	 * @param e	exception to log
+	 * @param logLevel	level of logging
+	 */
+	protected void writeLog(Exception e, LogLevel logLevel) {
+		logger.write(e, logLevel);
+	}
+
+}

src/clientP2P/ClientInterfaceCLI.java

@@ -0,0 +1,138 @@
+package clientP2P;
+import clientP2P.ClientInterface;
+import clientP2P.ClientManagement;
+import tools.LogLevel;
+import tools.Logger;
+import java.util.Scanner;
+import localException.ProtocolError;
+import localException.InternalError;
+import localException.ProtocolError;
+import localException.SizeError;
+import localException.TransmissionError;
+import localException.VersionError;
+import localException.SocketClosed;
+import remoteException.EmptyFile;
+import remoteException.EmptyDirectory;
+import remoteException.InternalRemoteError;
+import remoteException.NotFound;
+import remoteException.ProtocolRemoteError;
+import remoteException.VersionRemoteError;
+import remoteException.NotATracker;
+import remoteException.UnknownHost;
+import java.io.IOException;
+import java.net.UnknownHostException;
+import java.net.SocketException;
+
+/** Implementation of P2P-JAVA-PROJECT CLIENT interface for CLI
+ * @author	Louis Royer
+ * @author	Flavien Haas
+ * @author	JS Auge
+ * @version	1.0
+ */
+public class ClientInterfaceCLI extends ClientInterface {
+	private Scanner scanner;
+
+	/** Constructor with clientManagement, logger and scanner.
+	 * @param clientManagement	ClientManagement used
+	 * @param logger	Logger used
+	 * @param scanner	Scanner used to read input
+	 */
+	public ClientInterfaceCLI(ClientManagement clientManagement, Logger logger, Scanner scanner) {
+		super(clientManagement, logger);
+		this.scanner = scanner;
+	}
+
+	/** Implementation of Runnable
+	 */
+	public void run() {
+		boolean isrunning = true;
+		if (initHostList()) {
+			while (isrunning){
+				try {
+					int i = 1;
+					String[] list = clientManagement.listDirectory();
+					System.out.println("Files present on the server:");
+					System.out.println("0 : Exit the program");
+					for(String listItem: list) {
+						System.out.println(i + " : " + listItem);
+						i++;
+					}
+					System.out.println("Type the number associated with the file to download:");
+					String f = scanner.nextLine();
+					if(f.equals("0")) {
+						isrunning = false;
+					}
+					else {
+						int j = Integer.parseInt(f);
+						if(j <= list.length){
+							j--;
+							clientManagement.download(list[j]);
+							System.out.println("File " + f + " sucessfully downloaded");
+							writeLog("File " + f + " sucessfully downloaded", LogLevel.Info);
+						}
+						else{
+							System.out.println("File " + f + " unsucessfully downloaded, wrong number");
+							writeLog("File " + f + " unsucessfully downloaded, wrong number", LogLevel.Info);
+						}
+					}
+				} catch (EmptyDirectory e) {
+					clientManagement.writeLog("Server has no file in directory", LogLevel.Error);
+				} catch (InternalError e) {
+					writeLog("Client internal error", LogLevel.Error);
+				} catch (UnknownHostException e) {
+					writeLog("Server host is unknown", LogLevel.Error);
+				} catch (IOException e) {
+					writeLog("Request cannot be send or response cannot be received", LogLevel.Error);
+				} catch (TransmissionError e) {
+					writeLog("Message received is too big", LogLevel.Error);
+				} catch (ProtocolError e) {
+					writeLog("Cannot decode server’s response", LogLevel.Error);
+				} catch (VersionError e) {
+					writeLog("Server’s response use bad version of the protocol", LogLevel.Error);
+				} catch (SizeError e) {
+					writeLog("Cannot handle this packets because of internal representation limitations of numbers on the client", LogLevel.Error);
+				} catch (InternalRemoteError e) {
+					writeLog("Server internal error", LogLevel.Error);
+				} catch (ProtocolRemoteError e) {
+					writeLog("Server cannot decode client’s request", LogLevel.Error);
+				} catch (VersionRemoteError e) {
+					writeLog("Server cannot decode this version of the protocol", LogLevel.Error);
+				} catch (NotFound e) {
+					writeLog("Server has not this file in directory", LogLevel.Error);
+				} catch (EmptyFile e) {
+					writeLog("File is empty", LogLevel.Error);
+				}
+			}
+		}
+		writeLog("Exiting client", LogLevel.Info);
+	}
+
+	/** Initialization of hostList with retry in failure
+	 * @return	true if successfully initialized
+	 */
+	private boolean initHostList() {
+		boolean contacted = false;
+		boolean firstLoop = true;
+		boolean stop = false;
+		while (!contacted && !stop) {
+			try {
+				if (!firstLoop) {
+					writeLog("Cannot contact tracker. Try again [Y/n] ?", LogLevel.Error);
+					String tryAgain = scanner.nextLine();
+					if (tryAgain.equals("n") || tryAgain.equals("N")) {
+						stop = true;
+					}
+				}
+				firstLoop = false;
+				clientManagement.initHostList();
+				contacted = true;
+			} catch (SocketException e) {
+			} catch (UnknownHostException e) {
+			} catch (IOException e) {
+			} catch (Exception e) {
+				return false;
+			}
+		}
+		return !stop;
+	}
+}

src/clientP2P/ClientManagement.java

@@ -1,8 +1,8 @@
 package clientP2P;
 
 import java.util.Arrays;
-import java.util.Scanner;
 import java.util.List;
+import java.util.ArrayList;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Paths;
@@ -31,6 +31,8 @@ import remoteException.ProtocolRemoteError;
 import remoteException.VersionRemoteError;
 import remoteException.NotATracker;
 import remoteException.UnknownHost;
+import exception.RemoteException;
+import exception.LocalException;
 import tools.ServeErrors;
 import tools.HostItem;
 import tools.Logger;
@@ -43,14 +45,13 @@ import java.net.SocketException;
  * @author	JS Auge
  * @version	1.0
  */
-public abstract class ClientManagement extends ServeErrors implements Runnable {
+public abstract class ClientManagement extends ServeErrors {
 	protected String baseDirectory;
 	protected String partsSubdir;
-	protected List<HostItem> hostList;
+	protected List<HostItem> hostList = new ArrayList<>();
 	protected HostItem tracker;
 	protected HostItem client;
 	protected Logger logger;
-	protected Scanner scanner;
 	protected ClientDownload downLoader;
 
 	/** Constructor with baseDirectory, tracker, partsSubdir, logger, and scanner parameters.
@@ -58,23 +59,14 @@ public abstract class ClientManagement extends ServeErrors implements Runnable {
 	 * @param tracker Tracker hostItem
 	 * @param partsSubdir	subdirectory to store file parts
 	 * @param logger	Loggger
-	 * @param scanner	Scanner used to read input
 	 * @param client	HostItem of the application
 	 */
-	public ClientManagement(String baseDirectory, HostItem tracker, String partsSubdir, Logger logger, Scanner scanner, HostItem client) {
+	public ClientManagement(String baseDirectory, HostItem tracker, String partsSubdir, Logger logger, HostItem client) {
-		this.scanner = scanner;
 		this.baseDirectory = baseDirectory;
 		this.tracker = tracker;
 		this.partsSubdir = partsSubdir;
 		this.logger = logger;
 		this.client = client;
-		try {
-			initHostList();
-		} catch (InternalError e) {
-			System.exit(-1);
-		} catch (ProtocolError e) {
-			System.exit(-2);
-		}
 	}
 
 	/** Getter for tracker socket
@@ -93,33 +85,14 @@ public abstract class ClientManagement extends ServeErrors implements Runnable {
 	/** Initialize hostList from tracker
 	 * @throws	ProtocolError
 	 * @throws	InternalError
+	 * @throws	SocketException
+	 * @throws	UnknownHostException
+	 * @throws	IOException
 	 */
-	private void initHostList() throws ProtocolError, InternalError {
+	public void initHostList() throws ProtocolError, InternalError, SocketException, UnknownHostException, IOException {
 		ProtocolP2PPacket<?> d = createProtocolP2PPacket(new DiscoverRequest(null));
 		try {
-			boolean contacted = false;
+			d.sendRequest(getTrackerSocket());
-			boolean firstLoop = true;
-			boolean stop = false;
-			while (!contacted && !stop) {
-				try {
-					if (!firstLoop) {
-						writeLog("Cannot contact tracker. Try again [Y/n] ?", LogLevel.Error);
-						String tryAgain = scanner.nextLine();
-						if (tryAgain.equals("n") || tryAgain.equals("N")) {
-							stop = true;
-						}
-					}
-					firstLoop = false;
-					d.sendRequest(getTrackerSocket());
-					contacted = true;
-				} catch (SocketException e) {
-				} catch (UnknownHostException e) {
-				} catch (IOException e) {
-				}
-			}
-			if (stop) {
-				System.exit(3);
-			}
 			Payload p = d.receiveResponse().getPayload();
 			assert p instanceof DiscoverResponse : "This payload must be instance of Filelist";
 			if (!(p instanceof DiscoverResponse)) {
@@ -131,10 +104,10 @@ public abstract class ClientManagement extends ServeErrors implements Runnable {
 		} catch (SocketClosed e){
 			writeLog("listDirectory : SocketClosed", LogLevel.Error);
 			throw new ProtocolError();
-		} catch (NotATracker e) {
+		} catch (LocalException e) {
 			writeLog(e, LogLevel.Error);
 			throw new ProtocolError();
-		} catch (Exception e) {
+		} catch (RemoteException e) {
 			writeLog(e, LogLevel.Error);
 			throw new ProtocolError();
 		}
@@ -144,7 +117,7 @@ public abstract class ClientManagement extends ServeErrors implements Runnable {
 	 * @param	filename
 	 * @return	hashsum
 	 */
-	protected byte[] computeHashsum(String filename, HashAlgorithm h) {
+	private byte[] computeHashsum(String filename, HashAlgorithm h) {
 		try {
 			MessageDigest md = MessageDigest.getInstance(HashAlgorithm.SHA512.getName());
 			return md.digest(Files.readAllBytes(Paths.get(baseDirectory + filename)));
@@ -181,7 +154,7 @@ public abstract class ClientManagement extends ServeErrors implements Runnable {
 	 * @throws	ProtocolRemoteError
 	 * @throws	VersionRemoteError
 	 */
-	protected String[] listDirectory() throws EmptyDirectory, InternalError, UnknownHostException, IOException, TransmissionError, ProtocolError, VersionError, SizeError, InternalRemoteError, ProtocolRemoteError, VersionRemoteError {
+	public String[] listDirectory() throws EmptyDirectory, InternalError, UnknownHostException, IOException, TransmissionError, ProtocolError, VersionError, SizeError, InternalRemoteError, ProtocolRemoteError, VersionRemoteError {
 		if (hostList.size() == 0) {
 			return new String[0];
 		}
@@ -234,7 +207,7 @@ public abstract class ClientManagement extends ServeErrors implements Runnable {
 	 * @throws	VersionRemoteError
 	 * @throws	EmptyFile
 	 */
-	private void download(String filename) throws EmptyFile, NotFound, InternalError, UnknownHostException, IOException, TransmissionError, ProtocolError, VersionError, SizeError, InternalRemoteError, ProtocolRemoteError, VersionRemoteError {
+	public void download(String filename) throws EmptyFile, NotFound, InternalError, UnknownHostException, IOException, TransmissionError, ProtocolError, VersionError, SizeError, InternalRemoteError, ProtocolRemoteError, VersionRemoteError {
 		initDownloader(filename);
 		Thread t = new Thread(downLoader);
 		t.start();
@@ -268,66 +241,17 @@ public abstract class ClientManagement extends ServeErrors implements Runnable {
 		}
 	}
 
-	/** Implementation of Runnable
+	/** Implementation of writeLog
+	 * @param text	Text to log
+	 * @param logLevel	level of logging
 	 */
-	public void run() {
+	protected abstract void writeLog(String text, LogLevel logLevel);
-		boolean isrunning = true;
+
-		while (isrunning){
+	/** Implementation of writeLog
-			try {
+	 * @param e	exception to log
-				int i = 1;
+	 * @param logLevel	level of logging
-				String[] list = listDirectory();
+	 */
-				System.out.println("Files present on the server:");
+	protected abstract void writeLog(Exception e, LogLevel logLevel);
-				System.out.println("0 : Exit the program");
+
-				for(String listItem: list) {
+
-					System.out.println(i + " : " + listItem);
-					i++;
-				}
-				System.out.println("Type the number associated with the file to download:");
-				String f = scanner.nextLine();
-				if(f.equals("0")){
-					isrunning = false;
-				}
-				else{
-					int j = Integer.parseInt(f);
-					if(j <= list.length){
-						j--;
-						download(list[j]);
-						System.out.println("File " + f + " sucessfully downloaded");
-						writeLog("File " + f + " sucessfully downloaded", LogLevel.Info);
-					}
-					else{
-						System.out.println("File " + f + " unsucessfully downloaded, wrong number");
-						writeLog("File " + f + " unsucessfully downloaded, wrong number", LogLevel.Info);
-					}
-				}
-			} catch (EmptyDirectory e) {
-				writeLog("Server has no file in directory", LogLevel.Error);
-			} catch (InternalError e) {
-				writeLog("Client internal error", LogLevel.Error);
-			} catch (UnknownHostException e) {
-				writeLog("Server host is unknown", LogLevel.Error);
-			} catch (IOException e) {
-				writeLog("Request cannot be send or response cannot be received", LogLevel.Error);
-			} catch (TransmissionError e) {
-				writeLog("Message received is too big", LogLevel.Error);
-			} catch (ProtocolError e) {
-				writeLog("Cannot decode server’s response", LogLevel.Error);
-			} catch (VersionError e) {
-				writeLog("Server’s response use bad version of the protocol", LogLevel.Error);
-			} catch (SizeError e) {
-				writeLog("Cannot handle this packets because of internal representation limitations of numbers on the client", LogLevel.Error);
-			} catch (InternalRemoteError e) {
-				writeLog("Server internal error", LogLevel.Error);
-			} catch (ProtocolRemoteError e) {
-				writeLog("Server cannot decode client’s request", LogLevel.Error);
-			} catch (VersionRemoteError e) {
-				writeLog("Server cannot decode this version of the protocol", LogLevel.Error);
-			} catch (NotFound e) {
-				writeLog("Server has not this file in directory", LogLevel.Error);
-			} catch (EmptyFile e) {
-				writeLog("File is empty", LogLevel.Error);
-			}
-		}
-		writeLog("Exiting client", LogLevel.Info);
-	}
 }

src/clientP2P/ClientManagementTCP.java

@@ -26,11 +26,10 @@ public class ClientManagementTCP extends ClientManagement {
 	 * @param tracker Tracker hostItem
 	 * @param partsSubdir	subdirectory to store file parts
 	 * @param logger	Loggger
-	 * @param scanner	Scanner used to read input
 	 * @param client	HostItem of the application
 	 */
-	public ClientManagementTCP(String baseDirectory, HostItem tracker, String partsSubdir, Logger logger, Scanner scanner, HostItem client) {
+	public ClientManagementTCP(String baseDirectory, HostItem tracker, String partsSubdir, Logger logger, HostItem client) {
-		super(baseDirectory, tracker, partsSubdir, logger, scanner, client);
+		super(baseDirectory, tracker, partsSubdir, logger, client);
 	}
 
 	/** Initialize downloader

src/clientP2P/ClientManagementUDP.java

@@ -25,11 +25,10 @@ public class ClientManagementUDP extends ClientManagement {
 	 * @param tracker	tracker HostItem
 	 * @param partsSubdir	subdirectory to store file parts
 	 * @param logger	Loggger
-	 * @param scanner	Scanner used to read input
 	 * @param client	HostItem of the application
 	 */
-	public ClientManagementUDP(String baseDirectory, HostItem tracker, String partsSubdir, Logger logger, Scanner scanner, HostItem client) {
+	public ClientManagementUDP(String baseDirectory, HostItem tracker, String partsSubdir, Logger logger, HostItem client) {
-		super(baseDirectory, tracker, partsSubdir, logger, scanner, client);
+		super(baseDirectory, tracker, partsSubdir, logger, client);
 	}
 
 	/** Initialize downloader

src/clientP2P/ClientP2P.java

@@ -5,6 +5,7 @@ import java.util.List;
 import clientP2P.ClientManagementUDP;
 import clientP2P.ClientManagementTCP;
 import serverP2P.ServerManagementUDP;
+import clientP2P.ClientInterfaceCLI;
 import serverP2P.ServerManagementTCP;
 import tools.Logger;
 import tools.LogLevel;
@@ -165,16 +166,16 @@ public class ClientP2P {
 				case "upd": // to avoid users typos
 				case "2" :
 					System.out.println("Starting with UDP");
-					ClientManagementUDP cmudp = new ClientManagementUDP(c.directories.getDataHomeDirectory(), c.tracker, c.directories.getDataHomeDirectory() + c.partsDir, c.loggerClient, c.scanner, c.server);
+					ClientManagementUDP cmudp = new ClientManagementUDP(c.directories.getDataHomeDirectory(), c.tracker, c.directories.getDataHomeDirectory() + c.partsDir, c.loggerClient, c.server);
-					tclient = new Thread(cmudp);
+					tclient = new Thread(new ClientInterfaceCLI(cmudp, c.loggerClient, c.scanner));
 					break;
 				case "TCP":
 				case "tcp":
 				case "1":
 				default:
 					System.out.println("Starting with TCP");
-					ClientManagementTCP cmtcp = new ClientManagementTCP(c.directories.getDataHomeDirectory(), c.tracker, c.directories.getDataHomeDirectory() + c.partsDir, c.loggerClient, c.scanner, c.server);
+					ClientManagementTCP cmtcp = new ClientManagementTCP(c.directories.getDataHomeDirectory(), c.tracker, c.directories.getDataHomeDirectory() + c.partsDir, c.loggerClient, c.server);
-					tclient = new Thread(cmtcp);
+					tclient = new Thread(new ClientInterfaceCLI(cmtcp, c.loggerClient, c.scanner));
 					break;
 			}
 			tclient.setName("client P2P-JAVA-PROJECT");

src/serverP2P/FileWatcherTCP.java

@@ -50,7 +50,7 @@ public class FileWatcherTCP extends FileWatcher {
 	 */
 	protected void registerTracker() {
 		try {
-			writeLog("Trying to into tracker", LogLevel.Info);
+			writeLog("Trying to register into tracker", LogLevel.Info);
 			ProtocolP2PPacket<Register> p = (ProtocolP2PPacket<Register>)new ProtocolP2PPacketTCP<Register>(new Register(server));
 			p.sendRequest((Object)tracker.tryGetTCPSocket());
 			writeLog("Register request sent.", LogLevel.Debug);

src/serverP2P/ServerManagement.java

@@ -26,6 +26,8 @@ import java.util.Map;
 import java.util.HashMap;
 import java.util.Random;
 import java.io.IOException;
+import java.net.UnknownHostException;
+import java.net.SocketException;
 import exception.LocalException;
 import localException.InternalError;
 import remoteException.UnknownHost;
@@ -253,8 +255,13 @@ public abstract class ServerManagement extends ServeErrors implements Runnable {
 
 
 	/** Getter for tracker socket
+	 * @return Tracker's socket
+	 * @throws	SocketException
+	 * @throws	UnknownHostException
+	 * @throws	IOException
 	 */
-	protected abstract Object getTrackerSocket(); 
+	protected abstract Object getTrackerSocket() throws SocketException, UnknownHostException, IOException;
+
 
 	/** Send unregister request to tracker
 	 */
@@ -263,7 +270,13 @@ public abstract class ServerManagement extends ServeErrors implements Runnable {
 		try {
 			writeLog("Unregistering from tracker", LogLevel.Info);
 			createProtocolP2PPacket(new Unregister(server)).sendRequest(getTrackerSocket());
-		} catch (Exception e) {
+		} catch (SocketException e) {
+			writeLog("Cannot unregister from tracker", LogLevel.Error);
+		} catch (UnknownHostException e) {
+			writeLog("Cannot unregister from tracker", LogLevel.Error);
+		} catch (IOException e) {
+			writeLog("Cannot unregister from tracker", LogLevel.Error);
+		}	catch (Exception e) {
 			writeLog("Cannot unregister from tracker", LogLevel.Error);
 			writeLog(e, LogLevel.Error);
 		}

src/serverP2P/ServerManagementTCP.java

@@ -30,6 +30,7 @@ import tools.LogLevel;
 import tools.HostItem;
 import java.util.HashMap;
 import java.util.Map;
+import java.net.UnknownHostException;
 import protocolP2P.HashAlgorithm;
 import protocolP2P.HashRequest;
 import protocolP2P.HashResponse;
@@ -169,11 +170,15 @@ public class ServerManagementTCP extends ServerManagement {
 
 	/** Getter for tracker socket
 	 * @return Tracker's socket
+	 * @throws	SocketException
+	 * @throws	UnknownHostException
+	 * @throws	IOException
 	 */
-	protected Object getTrackerSocket() {
+	protected Object getTrackerSocket() throws SocketException, UnknownHostException, IOException {
-		return (Object)tracker.getTCPSocket();
+		return (Object)tracker.tryGetTCPSocket();
 	}
 
+
 	/** Closes socket */
 	protected void closeSocket() {
 		try {

src/serverP2P/ServerManagementUDP.java

@@ -122,12 +122,16 @@ public class ServerManagementUDP extends ServerManagement {
 	}
 
 	/** Getter for tracker socket
-	 * @return	Tracker's socket
+	 * @return Tracker's socket
+	 * @throws	SocketException
+	 * @throws	UnknownHostException
+	 * @throws	IOException
 	 */
-	protected Object getTrackerSocket() {
+	protected Object getTrackerSocket() throws SocketException, UnknownHostException, IOException {
-		return (Object)tracker.getUDPSocket();
+		return (Object)tracker.tryGetUDPSocket();
 	}
 
+
 	/** Closes socket */
 	protected void closeSocket() {
 		socket.close();

src/tools/HostItem.java

@@ -35,13 +35,16 @@ public class HostItem {
 		try {
 			return tryGetTCPSocket();
 		} catch (SocketException e) {
-			System.err.println("getTCPSocket error: No TCP socket available.");
+			System.err.println("getTCPSocket error: No TCP socket available (" + this +").");
+			e.printStackTrace();
 			System.exit(-1);
 		} catch (UnknownHostException e) {
 			System.err.println("getTCPSocket error: Unknown host (" + this + ").");
+			e.printStackTrace();
 			System.exit(-1);
 		} catch (IOException e) {
 			System.err.println("getTCPSocket error: Cannot create TCP socket (" + this + ").");
+			e.printStackTrace();
 			System.exit(-1);
 		}
 		return null; // java compiler is stupid and doesn't know about System.exit
@@ -80,7 +83,7 @@ public class HostItem {
 		try {
 			return tryGetUDPSocket();
 		} catch (SocketException e) {
-			System.err.println("getUDPSocket error: No UDP socket available." );
+			System.err.println("getUDPSocket error: No UDP socket available ( " + this + ")." );
 			System.exit(-1);
 		} catch (UnknownHostException e) {
 			System.err.println("getUDPSocket error: Unknown host (" + this + ").");

src/tools/Logger.java

@@ -90,6 +90,15 @@ public class Logger {
 		}
 	}
 
+	/** Appends log to filelog and print to stderr.
+	 * @param e	Exception to log
+	 * @param logLevel	Type of log
+	 */
+	public void write(Exception e, LogLevel logLevel) {
+		write(e.toString(), logLevel);
+		e.printStackTrace();
+	}
+
 	/** Appends log to filelog and print to stderr.
 	 * Adds [TCP] in log line.
 	 * @param text	Text to log
@@ -101,7 +110,7 @@ public class Logger {
 
 	/** Appends log to filelog and print to stderr.
 	 * Adds [TCP] in log line.
-	 * @param text	Text to log
+	 * @param e	Exception to log
 	 * @param logLevel	Type of log
 	 */
 	public void writeTCP(Exception e, LogLevel logLevel) {
@@ -120,7 +129,7 @@ public class Logger {
 
 	/** Appends log to filelog and print to stderr.
 	 * Adds [UDP] in log line.
-	 * @param text	Text to log
+	 * @param e	Excetpino to log
 	 * @param logLevel	Type of log
 	 */
 	public void writeUDP(Exception e, LogLevel logLevel) {