I tried multiple variations of it but does not work any pointers?
I had actually the return as "date_bot_"+X but changed it to new String("date_bot_"+X).
Either way it seems to fail.
Thanks
package com.codegym.task.task30.task3008;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public class Server {
private static Map<String, Connection> connectionMap = new ConcurrentHashMap<>();
public static void main(String[] args) throws IOException {
ConsoleHelper.writeMessage("Provide a port to communicate");
try (ServerSocket serverSocket = new ServerSocket(ConsoleHelper.readInt());){
ConsoleHelper.writeMessage("The server is running");
while (true) {
new Handler(serverSocket.accept()).start();
}
} catch (Exception socketExcpn) {
ConsoleHelper.writeMessage(socketExcpn.getMessage());
}
}
private static class Handler extends Thread {
private Socket socket;
public Handler(Socket socket) {
this.socket = socket;
}
private String serverHandshake(Connection connection) throws IOException, ClassNotFoundException {
String userName = "";
boolean isValidUsername = false;
Message receivedMessage = null;
while(!isValidUsername){
connection.send(new Message(MessageType.NAME_REQUEST));
receivedMessage = connection.receive();
userName = receivedMessage.getData();
if (userName != null && !userName.equals("") && !connectionMap.containsKey(userName)
&& receivedMessage.getType().equals(MessageType.USER_NAME)) {
connectionMap.put(userName, connection);
connection.send(new Message(MessageType.NAME_ACCEPTED));
isValidUsername = true;
}
}
return userName;
}
private void notifyUsers(Connection connection, String userName) throws IOException {
for (String str : connectionMap.keySet()){
if (!str.equals(userName)) {
connection.send(new Message(MessageType.USER_ADDED,str));
}
}
}
private void serverMainLoop(Connection connection, String userName) throws IOException, ClassNotFoundException{
while (true) {
try {
Message received = connection.receive();
if (received.getType().equals(MessageType.TEXT)) {
String messageData = userName + ": " + received.getData();
sendBroadcastMessage(new Message(MessageType.TEXT, messageData));
} else {
ConsoleHelper.writeMessage("Received message is not text");
}
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
}
@Override
public void run() {
ConsoleHelper.writeMessage("Connection has been established with the remote Address" + socket.getRemoteSocketAddress());
String userName = "";
try (Connection connection = new Connection(socket);){
userName = serverHandshake(connection);
sendBroadcastMessage(new Message(MessageType.USER_ADDED,userName));
notifyUsers(connection,userName);
serverMainLoop(connection,userName);
} catch (IOException | ClassNotFoundException e) {
e.printStackTrace();
} finally {
connectionMap.remove(userName);
sendBroadcastMessage(new Message(MessageType.USER_REMOVED,userName));
}
}
}
public static void sendBroadcastMessage(Message message) {
for (String str : connectionMap.keySet()) {
try {
connectionMap.get(str).send(message);
} catch (Exception messageSentException) {
ConsoleHelper.writeMessage("Could not send message");
}
}
}
}