UDPServer.java

// Copyright 2014-2015 Boundary, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.boundary.sdk.event.util;

import java.io.IOException;
import java.net.*;

class UDPServer {
	public static void main(String args[]) {
		if (args.length != 1) {
			System.out.println("useage: port");
		}
		int serverPort = Integer.parseInt(args[0]);
		DatagramSocket serverSocket = null;
		try {
			serverSocket = new DatagramSocket(serverPort);
			byte[] receiveData = new byte[1024];
			byte[] sendData = new byte[1024];
			while (true) {
				DatagramPacket receivePacket = new DatagramPacket(receiveData,
						receiveData.length);
				serverSocket.receive(receivePacket);
				String sentence = new String(receivePacket.getData());
				System.out.println("RECEIVED: " + sentence);
				InetAddress IPAddress = receivePacket.getAddress();
				int port = receivePacket.getPort();
				String capitalizedSentence = sentence.toUpperCase();
				sendData = capitalizedSentence.getBytes();
				DatagramPacket sendPacket = new DatagramPacket(sendData,
						sendData.length, IPAddress, port);
				serverSocket.send(sendPacket);
			}
		} catch (IOException e) {
			System.err.println(e);
			serverSocket.close();
		}

	}
}