Esempio n. 1
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    @Override
    public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) {
      ChannelBuffer buf;
      PaxosMessage msg;

      buf = (ChannelBuffer) e.getMessage();

      // Read in the message string.
      msg = new PaxosMessage();
      msg.unSerialize(buf.array());

      // Send the message upstream to the server handler.
      Channels.fireMessageReceived(ctx, msg);
    }
Esempio n. 2
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 /**
  * Send a specific message to the supplied role.
  *
  * @param destination Destination role
  * @param msg Message to send
  */
 public void send(PaxosRole destination, PaxosMessage msg) {
   StaticNetwork.Route route = network.getRoute(destination.getID());
   if (route != null) {
     msg.setDestination(destination.getType());
     pipeline.startClient(route.ip, route.port, msg);
   }
 }
Esempio n. 3
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    @Override
    public void writeRequested(ChannelHandlerContext ctx, MessageEvent e) {
      PaxosMessage msg;
      ChannelBuffer sendBuf;
      byte[] data;

      msg = (PaxosMessage) e.getMessage(); // The original message.

      // Serialize the message.
      data = msg.serialize();
      sendBuf = ChannelBuffers.buffer(data.length);
      sendBuf.writeBytes(data); // Write the actual msg.

      // Send the message upstream.
      Channels.write(ctx, e.getFuture(), sendBuf);
    }
Esempio n. 4
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  /**
   * Multi-cast a message to all nodes with a specific role.
   *
   * @param role Destination role
   * @param msg Message to send
   * @param expected Number of nodes to multicast
   * @return Success code
   */
  public int multicast(PaxosRole.Role role, PaxosMessage msg, int expected) {
    // Get all the nodes in the network.
    Map<String, StaticNetwork.Route> routes = network.getAllRoutes();

    int i = 0;
    for (String id : routes.keySet()) {

      if (!id.equals(home)) {
        // Make sure that we are not sending to a client.
        if (role != PaxosRole.Role.CLIENT && !network.isClientConnection(id)) {
          StaticNetwork.Route route = routes.get(id);

          msg.setDestination(role);
          pipeline.startClient(route.ip, route.port, msg);

          // Increment the number of messages sent.
          ++i;
        }
      }

      // Only send the minimum necessary.
      if (i == expected) {
        break;
      }
    }

    return PaxosCommunicator.SUCCESS;
  }
Esempio n. 5
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  /**
   * Send a message to a non-specific node with the specified role. Usually this means sending to a
   * local role on the same node, unless the sending role is already on the node.
   */
  public void send(PaxosRole sender, PaxosRole.Role role, PaxosMessage msg) {
    // Ask the network for the "desired" target. Depending on the
    // network implementation, this could be the "leader", etc.
    StaticNetwork.Route route = network.getDesirable(home);

    if (route != null) {
      msg.setDestination(role);
      pipeline.startClient(route.ip, route.port, msg);
    }
  }
Esempio n. 6
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    /** The server has received a message. */
    @Override
    public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) {
      PaxosMessage msg;

      // Get our consensus message and hand it back to the parent.
      msg = (PaxosMessage) e.getMessage();
      if (msg != null) {
        // Try to get remote connection information.
        // This is used if we need to update the network
        // information later.
        Channel channel = ctx.getChannel();
        InetSocketAddress remote = (InetSocketAddress) channel.getRemoteAddress();

        // Update the message with the remote address.
        msg.setRemoteAddress(remote.getAddress().getHostAddress());

        // Update the client.
        updateCallback(msg);

        // Close the channel so that we don't leak descriptors.
        channel.close();
      }
    }