public override Message OnReceiveMessage(Message message)
{
if (message.GetType() != typeof(Response))
{
throw new NotImplementedException();
}
var response = (Response)message;
lock (ReceivedResponses) {
// if duplicated response, ignore
if (ReceivedResponses.ContainsKey(response.Request.SeqNum))
{
return(null);
}
ReceivedResponses.Add(response.Request.SeqNum, response);
}
// if it receives at least one response for a blocking request then unblock ( can only send one and then block, so it will always unblock properly? )
if (response.Request.GetType() == typeof(ReadRequest) ||
response.Request.GetType() == typeof(TakeRequest))
{
if (RequestSemaphore.TryGetValue(response.Request.SeqNum, out var semaphore))
{
semaphore.Release();
return(null);
}
throw new NotImplementedException("No semaphore was allocated.");
}
return(null);
}