Managing Asynchronous Communication Server - Java Network

Java examples for Network:Asynchronous Server

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Description

Managing Asynchronous Communication Server

Demo Code

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.AsynchronousServerSocketChannel;
import java.nio.channels.AsynchronousSocketChannel;
import java.nio.channels.CompletionHandler;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;

public class Main {

  public static void main(String[] args) {
    try {//ww  w .  j  a  v  a2  s  . c  om
      final AsynchronousServerSocketChannel listener = AsynchronousServerSocketChannel.open();
      InetSocketAddress address = new InetSocketAddress("localhost", 5000);
      listener.bind(address);

      listener.accept(null, new CompletionHandler<AsynchronousSocketChannel, Void>() {

        public void completed(AsynchronousSocketChannel channel, Void attribute) {
          try {
            System.out.println("Server: completed method executing");
            while (true) {
              ByteBuffer buffer = ByteBuffer.allocate(32);
              Future<Integer> readFuture = channel.read(buffer);
              Integer number = readFuture.get();
              System.out.println("Server: Message received: " + new String(buffer.array()));
            }

          } catch (InterruptedException | ExecutionException ex) {
            ex.printStackTrace();
          }
        }

        public void failed(Throwable ex, Void atttribute) {
          System.out.println("Server: CompletionHandler exception");
          ex.printStackTrace();
        }
      });
      while (true) {
        // wait
      }

    } catch (IOException ex) {
      ex.printStackTrace();
    }
  }
}

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