53 lines
1.4 KiB
Java
53 lines
1.4 KiB
Java
package Ex2;
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import java.io.IOException;
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import java.net.DatagramPacket;
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import java.net.DatagramSocket;
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import java.net.InetAddress;
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import java.net.SocketException;
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import java.time.Instant;
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public class Server {
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private final DatagramSocket socket;
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public Server(int port) throws SocketException {
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this.socket = new DatagramSocket(port);
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new Thread(this::readMessages).start();
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}
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public int getPort() {
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return this.socket.getLocalPort();
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}
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private void sendMessage(String message, InetAddress address, int port) throws IOException {
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byte[] buffer = message.getBytes();
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DatagramPacket packet = new DatagramPacket(buffer, buffer.length, address, port);
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this.socket.send(packet);
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}
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private void processMessage(DatagramPacket packet) throws IOException {
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Instant tPrime1 = Instant.now();
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String message = new String(packet.getData(), 0, packet.getLength());
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System.out.println("[Server] Message recieved : " + message);
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Instant t1 = Instant.parse(message);
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Instant tPrime2 = Instant.now();
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sendMessage(t1.toString() + " " + tPrime1.toString() + " " + tPrime2.toString(), packet.getAddress(), packet.getPort());
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}
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private void readMessages() {
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while (true) {
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byte[] buffer = new byte[1024];
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DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
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try {
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this.socket.receive(packet);
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processMessage(packet);
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} catch (IOException e) {
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e.printStackTrace();
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break;
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}
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}
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}
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}
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