Example usage for org.apache.commons.net EchoUDPClient open

Introduction

In this page you can find the example usage for org.apache.commons.net EchoUDPClient open.

Prototype

public void open() throws SocketException 

Source Link

Document

Opens a DatagramSocket on the local host at the first available port.

Usage

From source file:examples.echo.java

public static final void echoUDP(String host) throws IOException {
    int length, count;
    byte[] data;/*from  www . jav  a  2s.  c o  m*/
    String line;
    BufferedReader input;
    InetAddress address;
    EchoUDPClient client;

    input = new BufferedReader(new InputStreamReader(System.in));
    address = InetAddress.getByName(host);
    client = new EchoUDPClient();

    client.open();
    // If we don't receive an echo within 5 seconds, assume the packet is lost.
    client.setSoTimeout(5000);
    System.out.println("Ready to echo to " + host + ".");

    // Remember, there are no guarantees about the ordering of returned
    // UDP packets, so there is a chance the output may be jumbled.
    while ((line = input.readLine()) != null) {
        data = line.getBytes();
        client.send(data, address);
        count = 0;
        do {
            try {
                length = client.receive(data);
            }
            // Here we catch both SocketException and InterruptedIOException,
            // because even though the JDK 1.1 docs claim that
            // InterruptedIOException is thrown on a timeout, it seems
            // SocketException is also thrown.
            catch (SocketException e) {
                // We timed out and assume the packet is lost.
                System.err.println("SocketException: Timed out and dropped packet");
                break;
            } catch (InterruptedIOException e) {
                // We timed out and assume the packet is lost.
                System.err.println("InterruptedIOException: Timed out and dropped packet");
                break;
            }
            System.out.print(new String(data, 0, length));
            count += length;
        } while (count < data.length);

        System.out.println();
    }

    client.close();
}

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