Test non-blocking accept() using ServerSocketChannel : ServerSocketChannel « Network « Java Tutorial

1. Java Tutorial
2. Network
3. ServerSocketChannel

import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;

/**
 * Test non-blocking accept() using ServerSocketChannel.
 */
public class MainClass {
  public static final String GREETING = "Hello I must be going.\r\n";

  public static void main(String[] argv) throws Exception {
    int port = 1234; // default

    ByteBuffer buffer = ByteBuffer.wrap(GREETING.getBytes());
    ServerSocketChannel ssc = ServerSocketChannel.open();

    ssc.socket().bind(new InetSocketAddress(port));
    ssc.configureBlocking(false);

    while (true) {
      System.out.println("Waiting for connections");

      SocketChannel sc = ssc.accept();

      if (sc == null) {
        Thread.sleep(2000);
      } else {
        System.out.println("Incoming connection from: " + sc.socket().getRemoteSocketAddress());

        buffer.rewind();
        sc.write(buffer);
        sc.close();
      }
    }
  }
}