public override void Read(ChannelHandlerContext ctx, object msg)
{
// client-side:
// Here, the result for the awaitable task can be set.
// If it is not a fire-and-forget message, the "result" of the TCS
// must be set here. (If FF, then it is set in Sender.)
// Java uses a SimpleChannelInboundHandler that only expects Message objects
var responseMessage = msg as Message.Message;
if (responseMessage == null)
{
return;
}
var recvMessageId = new MessageId(responseMessage);
// error handling
if (responseMessage.Type == Message.Message.MessageType.UnknownId)
{
string msg2 =
"Message was not delivered successfully. Unknown ID (peer may be offline or unknown RPC handler): " +
_message;
ExceptionCaught(ctx, new PeerException(PeerException.AbortCauseEnum.PeerAbort, msg2));
return;
}
if (responseMessage.Type == Message.Message.MessageType.Exception)
{
string msg2 = "Message caused an exception on the other side. Handle as PeerAbort: " + _message;
ExceptionCaught(ctx, new PeerException(PeerException.AbortCauseEnum.PeerAbort, msg2));
return;
}
if (responseMessage.IsRequest())
{
ctx.FireRead(responseMessage);
return;
}
if (!_sendMessageId.Equals(recvMessageId))
{
string msg2 =
String.Format(
"Response message [{0}] sent to the node is not the same as we expect. We sent request message [{1}].",
responseMessage, _message);
ExceptionCaught(ctx, new PeerException(PeerException.AbortCauseEnum.PeerAbort, msg2));
return;
}
// We need to exclude RCON messages from the sanity check because we
// use this RequestHandler for sending a Type.REQUEST_1,
// RPC.Commands.RCON message on top of it. Therefore the response
// type will never be the same Type as the one the user initially
// used (e.g. DIRECT_DATA).
if (responseMessage.Command != Rpc.Rpc.Commands.Rcon.GetNr() &&
_message.Recipient.IsRelayed != responseMessage.Sender.IsRelayed)
{
string msg2 =
String.Format(
"Response message [{0}] sent has a different relay flag than we sent with request message [{1}]. Recipient ({2}) / Sender ({3}).",
responseMessage, _message, _message.Recipient.IsRelayed, responseMessage.Sender.IsRelayed);
ExceptionCaught(ctx, new PeerException(PeerException.AbortCauseEnum.PeerAbort, msg2));
return;
}
// we got a good answer, let's mark the sender as alive
if (responseMessage.IsOk() || responseMessage.IsNotOk())
{
lock (PeerBean.PeerStatusListeners)
{
if (responseMessage.Sender.IsRelayed && responseMessage.PeerSocketAddresses.Count != 0)
{
// use the response message as we have up-to-date content for the relays
PeerAddress remotePeer =
responseMessage.Sender.ChangePeerSocketAddresses(responseMessage.PeerSocketAddresses);
responseMessage.SetSender(remotePeer);
}
foreach (IPeerStatusListener listener in PeerBean.PeerStatusListeners)
{
listener.PeerFound(responseMessage.Sender, null, null);
}
}
}
// call this for streaming support
if (!responseMessage.IsDone)
{
Logger.Debug("Good message is streaming. {0}", responseMessage);
return;
}
if (!_message.IsKeepAlive())
{
Logger.Debug("Good message {0}. Close channel {1}.", responseMessage, ctx.Channel);
// .NET-specific:
// set the result now, but trigger the notify when the channel is closed
_tcsResponse.ResponseLater(responseMessage, ctx);
// in Java, the channel creator adds a listener that sets the
// future response result when the channel is closed
ctx.Close(); // TODO needed?
}
else
{
Logger.Debug("Good message {0}. Leave channel {1} open.", responseMessage, ctx.Channel);
_tcsResponse.SetResult(responseMessage);
}
}