PongMessage.java

package org.ripple.power.txns.btc;

import java.io.EOFException;
import java.nio.ByteBuffer;

/**
 * <p>Pong Message</p>
 * <pre>
 *   Size       Field               Description
 *   ====       =====               ===========
 *   8 bytes    Nonce               Random value from ping message
 * </pre> *
 */
public class PongMessage {

    /**
     * Send a 'pong' message to a peer
     *
     * @param       peer                Destination peer
     * @param       nonce               Nonce from the 'ping' message
     * @return                          'pong' message
     */
    public static Message buildPongMessage(Peer peer, long nonce) {
        //
        // Build the message data
        //
        SerializedBuffer msgBuffer = new SerializedBuffer(8).putLong(nonce);
        //
        // Build the message
        //
        ByteBuffer buffer = MessageHeader.buildMessage("pong", msgBuffer);
        return new Message(buffer, peer, MessageHeader.MessageCommand.PONG);
    }

    /**
     * Process a 'pong'
     *
     * @param       msg                 Message
     * @param       inBuffer            Input buffer
     * @param       msgListener         Message listener
     * @throws      EOFException        End-of-data while processing input stream
     */
    public static void processPongMessage(Message msg, SerializedBuffer inBuffer, MessageListener msgListener)
                                        throws EOFException {
        //
        // Get the nonce from the 'pong' message
        //
        long nonce = inBuffer.getLong();
        //
        // Notify the message listener
        //
        msgListener.processPong(msg, nonce);
    }
}