public Task Send <T>(T body, string destination, IDictionary <string, string> headers)
{
if (State != StompConnectionStatus.Connected)
{
throw new InvalidOperationException("The stomp client is not connected.");
}
var jsonPayload = JsonConvert.SerializeObject(body);
headers.Add("destination", destination);
headers.Add("content-type", "application/json;charset=UTF-8");
headers.Add("content-length", Encoding.UTF8.GetByteCount(jsonPayload).ToString());
var connectMessage = new StompFrame(StompFrameKind.Send, jsonPayload, headers);
_socket.Send(_stompSerializer.Serialize(connectMessage));
return(Task.CompletedTask);
}
public Task Subscribe <T>(string topic, IDictionary <string, string> headers, EventHandler <T> handler)
{
if (State != StompConnectionStatus.Connected)
{
throw new InvalidOperationException("The stomp client is not connected.");
}
headers.Add("destination", topic);
headers.Add("id", "stub"); // todo: study and implement
var subscribeMessage = new StompFrame(StompFrameKind.Subscribe, headers);
_tcpClient.Client.Send(_encode.GetBytes(_stompSerializer.Serialize(subscribeMessage)));
var sub = new Subscriber((sender, body) => handler(this, (T)body), typeof(T));
_subscribers.Add(topic, sub);
return(Task.CompletedTask);
}
public async Task Send <T>(T body, string destination, IDictionary <string, string> headers)
{
if (State != StompConnectionStatus.Connected)
{
throw new InvalidOperationException("The stomp client is not connected.");
}
var jsonPayload = JsonConvert.SerializeObject(body);
headers.Add("destination", destination);
headers.Add("content-type", "application/json;charset=UTF-8");
headers.Add("content-length", Encoding.UTF8.GetByteCount(jsonPayload).ToString());
var message = new StompFrame(StompFrameKind.Send, jsonPayload, headers);
_sendTimeout.Start();
await _tcpClient.Client.SendAsync(_encode.GetBytes(_stompSerializer.Serialize(message)), SocketFlags.None);
_sendTimeout.Stop();
}
/// <summary>
/// Serializes the frame into a STOMP protocol compatible string.
/// </summary>
/// <param name="message"></param>
/// <returns></returns>
public string Serialize(StompFrame message)
{
var buffer = new StringBuilder();
buffer.Append(message.FrameKind + "\n");
if (message.Headers != null)
{
foreach (var header in message.Headers)
{
buffer.Append(header.Key + ":" + header.Value + "\n");
}
}
buffer.Append("\n");
buffer.Append(message.Body);
buffer.Append('\0');
return(buffer.ToString());
}
public Task Connect(IDictionary <string, string> headers)
{
if (State != StompConnectionStatus.NeverConnected && State != StompConnectionStatus.DisconnectedByHost && State != StompConnectionStatus.DisconnectedByUser)
{
throw new InvalidOperationException("The current state of the connection is not Closed.");
}
State = StompConnectionStatus.Connecting;
_socket.Connect();
var connectMessage = new StompFrame(StompFrameKind.Connect, headers);
_socket.Send(_stompSerializer.Serialize(connectMessage));
_socket.OnMessage += HandleMessage;
_socket.OnError += (object sender, ErrorEventArgs e) =>
{
State = StompConnectionStatus.Error;
OnError?.Invoke(this, e.Message);
};
_socket.OnClose += (object sender, CloseEventArgs e) =>
{
State = StompConnectionStatus.DisconnectedByHost;
OnDisconnected?.Invoke(this, e.Reason);
};
_socket.OnOpen += (object sender, EventArgs e) =>
{
State = StompConnectionStatus.Connected;
OnConnected?.Invoke(this, null);
};
State = StompConnectionStatus.Connected;
return(Task.CompletedTask);
}
