/// <summary>
/// Triggers event and sends message to subscribers
/// </summary>
protected void Trigger(object model)
{
try
{
if (_subscribers.Count == 0)
{
return;
}
HorseMessage message = new HorseMessage(MessageType.Event, Target);
message.SetSource(Name);
if (model != null)
{
message.Serialize(model, _server.MessageContentSerializer);
}
byte[] data = HmqWriter.Create(message);
List <MqClient> removing = null;
lock (_subscribers)
foreach (MqClient subscriber in _subscribers)
{
//if client is disconnected, add it into removing list
if (!subscriber.IsConnected)
{
//removing list is created when it's needed
if (removing == null)
{
removing = new List <MqClient>();
}
removing.Add(subscriber);
}
else
{
_ = subscriber.SendAsync(data);
}
}
//if there are some removing clients from subscribers list, remove them
if (removing != null)
{
lock (_subscribers)
foreach (MqClient remove in removing)
{
_subscribers.Remove(remove);
}
}
}
catch (Exception e)
{
_server.SendError("EVENT_TRIGGER", e, $"Name:{Name}, Type:{GetType().Name}");
}
}
/// <summary>
/// Writes a message to a stream
/// </summary>
public async Task Write(Stream stream, HorseMessage message)
{
WriteType(stream, DataType.Insert);
await WriteId(stream, message.MessageId);
message.Content.Position = 0;
await using MemoryStream ms = new MemoryStream();
HmqWriter.Write(message, ms);
ms.Position = 0;
await WriteContent(Convert.ToInt32(ms.Length), ms, stream);
}
/// <summary>
///
/// </summary>
public async Task <HorseServerSocket> Connected(IHorseServer server, IConnectionInfo connection, ConnectionData data)
{
string clientId;
bool found = data.Properties.TryGetValue(HorseHeaders.CLIENT_ID, out clientId);
if (!found || string.IsNullOrEmpty(clientId))
{
clientId = _server.Server.ClientIdGenerator.Create();
}
//if another client with same unique id is online, do not accept new client
MqClient foundClient = _server.Clients.Find(x => x.UniqueId == clientId);
if (foundClient != null)
{
await connection.Socket.SendAsync(HmqWriter.Create(MessageBuilder.Busy()));
return(null);
}
//creates new node client object
MqClient client = new MqClient(_server.Server, connection);
client.Data = data;
client.UniqueId = clientId.Trim();
client.Token = data.Properties.GetStringValue(HorseHeaders.CLIENT_TOKEN);
client.Name = data.Properties.GetStringValue(HorseHeaders.CLIENT_NAME);
client.Type = data.Properties.GetStringValue(HorseHeaders.CLIENT_TYPE);
if (_server.Authenticator != null)
{
bool accepted = await _server.Authenticator.Authenticate(_server, client);
if (!accepted)
{
return(null);
}
}
client.RemoteHost = client.Info.Client.Client.RemoteEndPoint.ToString()?.Split(':')[0];
_server.Clients.Add(client);
await client.SendAsync(MessageBuilder.Accepted(client.UniqueId));
return(client);
}
public async Task DisconnectDueToPingTimeout()
{
TestHorseMq server = new TestHorseMq();
await server.Initialize();
int port = server.Start();
TcpClient client = new TcpClient();
await client.ConnectAsync("127.0.0.1", port);
NetworkStream stream = client.GetStream();
stream.Write(PredefinedMessages.PROTOCOL_BYTES_V2);
HorseMessage msg = new HorseMessage();
msg.Type = MessageType.Server;
msg.ContentType = KnownContentTypes.Hello;
msg.SetStringContent("GET /\r\nName: Test-" + port);
msg.CalculateLengths();
HmqWriter.Write(msg, stream);
await Task.Delay(1000);
Assert.Equal(1, server.ClientConnected);
ThreadPool.UnsafeQueueUserWorkItem(async s =>
{
byte[] buffer = new byte[128];
while (client.Connected)
{
int r = await s.ReadAsync(buffer);
if (r == 0)
{
client.Dispose();
break;
}
}
}, stream, false);
await Task.Delay(15000);
Assert.False(client.Connected);
Assert.Equal(1, server.ClientDisconnected);
}
public async Task Handle(MqClient client, HorseMessage message, bool fromNode)
{
//if server is not set or there is no connected server
if (_server.NodeManager.Connectors.Length == 0)
{
return;
}
byte[] mdata = HmqWriter.Create(message);
foreach (HmqStickyConnector connector in _server.NodeManager.Connectors)
{
bool grant = _server.NodeManager.Authenticator == null || await _server.NodeManager.Authenticator.CanReceive(connector.GetClient(), message);
if (grant)
{
_ = connector.SendAsync(mdata);
}
}
}
private async Task <PushResult> ProcessMessage(QueueMessage message, QueueClient receiver)
{
//if we need acknowledge from receiver, it has a deadline.
DateTime?deadline = null;
if (_queue.Options.Acknowledge != QueueAckDecision.None)
{
deadline = DateTime.UtcNow.Add(_queue.Options.AcknowledgeTimeout);
}
//return if client unsubsribes while waiting ack of previous message
if (!_queue.ClientsClone.Contains(receiver))
{
_queue.AddMessage(message, false);
return(PushResult.NoConsumers);
}
if (message.CurrentDeliveryReceivers.Count > 0)
{
message.CurrentDeliveryReceivers.Clear();
}
message.Decision = await _queue.DeliveryHandler.BeginSend(_queue, message);
if (!await _queue.ApplyDecision(message.Decision, message))
{
return(PushResult.Success);
}
//create prepared message data
byte[] messageData = HmqWriter.Create(message.Message);
//call before send and check decision
message.Decision = await _queue.DeliveryHandler.CanConsumerReceive(_queue, message, receiver.Client);
if (!await _queue.ApplyDecision(message.Decision, message))
{
return(PushResult.Success);
}
//create delivery object
MessageDelivery delivery = new MessageDelivery(message, receiver, deadline);
//send the message
bool sent = await receiver.Client.SendAsync(messageData);
if (sent)
{
if (_queue.Options.Acknowledge != QueueAckDecision.None)
{
receiver.CurrentlyProcessing = message;
receiver.ProcessDeadline = deadline ?? DateTime.UtcNow;
}
message.CurrentDeliveryReceivers.Add(receiver);
//adds the delivery to time keeper to check timing up
_queue.TimeKeeper.AddAcknowledgeCheck(delivery);
//mark message is sent
delivery.MarkAsSent();
_queue.Info.AddMessageSend();
//do after send operations for per message
_queue.Info.AddDelivery();
message.Decision = await _queue.DeliveryHandler.ConsumerReceived(_queue, delivery, receiver.Client);
}
else
{
message.Decision = await _queue.DeliveryHandler.ConsumerReceiveFailed(_queue, delivery, receiver.Client);
}
if (!await _queue.ApplyDecision(message.Decision, message))
{
return(PushResult.Success);
}
message.Decision = await _queue.DeliveryHandler.EndSend(_queue, message);
await _queue.ApplyDecision(message.Decision, message);
if (message.Decision.Allow && message.Decision.PutBack == PutBackDecision.No)
{
_queue.Info.AddMessageRemove();
_ = _queue.DeliveryHandler.MessageDequeued(_queue, message);
}
return(PushResult.Success);
}
/// <summary>
/// Called when a new client is connected via HMQ protocol
/// </summary>
public async Task <HorseServerSocket> Connected(IHorseServer server, IConnectionInfo connection, ConnectionData data)
{
string clientId;
bool found = data.Properties.TryGetValue(HorseHeaders.CLIENT_ID, out clientId);
if (!found || string.IsNullOrEmpty(clientId))
{
clientId = _server.ClientIdGenerator.Create();
}
//if another client with same unique id is online, do not accept new client
MqClient foundClient = _server.FindClient(clientId);
if (foundClient != null)
{
await connection.Socket.SendAsync(HmqWriter.Create(MessageBuilder.Busy()));
return(null);
}
if (_server.Options.ClientLimit > 0 && _server.GetOnlineClients() >= _server.Options.ClientLimit)
{
return(null);
}
//creates new mq client object
MqClient client = new MqClient(_server, connection, _server.MessageIdGenerator, _server.Options.UseMessageId);
client.Data = data;
client.UniqueId = clientId.Trim();
client.Token = data.Properties.GetStringValue(HorseHeaders.CLIENT_TOKEN);
client.Name = data.Properties.GetStringValue(HorseHeaders.CLIENT_NAME);
client.Type = data.Properties.GetStringValue(HorseHeaders.CLIENT_TYPE);
//authenticates client
foreach (IClientAuthenticator authenticator in _server.Authenticators)
{
client.IsAuthenticated = await authenticator.Authenticate(_server, client);
if (!client.IsAuthenticated)
{
await client.SendAsync(MessageBuilder.Unauthorized());
return(null);
}
}
//client authenticated, add it into the connected clients list
_server.AddClient(client);
//send response message to the client, client should check unique id,
//if client's unique id isn't permitted, server will create new id for client and send it as response
await client.SendAsync(MessageBuilder.Accepted(client.UniqueId));
foreach (IClientHandler handler in _server.ClientHandlers)
{
await handler.Connected(_server, client);
}
return(client);
}
private async Task <PushResult> ProcessMessage(QueueMessage message)
{
//if we need acknowledge from receiver, it has a deadline.
DateTime?ackDeadline = null;
if (_queue.Options.Acknowledge != QueueAckDecision.None)
{
ackDeadline = DateTime.UtcNow.Add(_queue.Options.AcknowledgeTimeout);
}
//if to process next message is requires previous message acknowledge, wait here
if (_queue.Options.Acknowledge == QueueAckDecision.WaitForAcknowledge)
{
await _queue.WaitForAcknowledge(message);
}
//if there are not receivers, complete send operation
List <QueueClient> clients = _queue.ClientsClone;
if (clients.Count == 0)
{
_queue.AddMessage(message, false);
return(PushResult.NoConsumers);
}
if (message.CurrentDeliveryReceivers.Count > 0)
{
message.CurrentDeliveryReceivers.Clear();
}
message.Decision = await _queue.DeliveryHandler.BeginSend(_queue, message);
if (!await _queue.ApplyDecision(message.Decision, message))
{
return(PushResult.Success);
}
//create prepared message data
byte[] messageData = HmqWriter.Create(message.Message);
Decision final = new Decision(false, false, PutBackDecision.No, DeliveryAcknowledgeDecision.None);
bool messageIsSent = false;
//to all receivers
foreach (QueueClient client in clients)
{
//to only online receivers
if (!client.Client.IsConnected)
{
continue;
}
//call before send and check decision
Decision ccrd = await _queue.DeliveryHandler.CanConsumerReceive(_queue, message, client.Client);
final = HorseQueue.CreateFinalDecision(final, ccrd);
if (!ccrd.Allow)
{
continue;
}
//create delivery object
MessageDelivery delivery = new MessageDelivery(message, client, ackDeadline);
//send the message
bool sent = await client.Client.SendAsync(messageData);
if (sent)
{
if (_queue.Options.Acknowledge != QueueAckDecision.None)
{
client.CurrentlyProcessing = message;
client.ProcessDeadline = ackDeadline ?? DateTime.UtcNow;
}
messageIsSent = true;
message.CurrentDeliveryReceivers.Add(client);
//adds the delivery to time keeper to check timing up
_queue.TimeKeeper.AddAcknowledgeCheck(delivery);
//mark message is sent
delivery.MarkAsSent();
//do after send operations for per message
_queue.Info.AddDelivery();
Decision d = await _queue.DeliveryHandler.ConsumerReceived(_queue, delivery, client.Client);
final = HorseQueue.CreateFinalDecision(final, d);
}
else
{
Decision d = await _queue.DeliveryHandler.ConsumerReceiveFailed(_queue, delivery, client.Client);
final = HorseQueue.CreateFinalDecision(final, d);
}
}
message.Decision = final;
if (!await _queue.ApplyDecision(final, message))
{
return(PushResult.Success);
}
//after all sending operations completed, calls implementation send completed method and complete the operation
if (messageIsSent)
{
_queue.Info.AddMessageSend();
}
message.Decision = await _queue.DeliveryHandler.EndSend(_queue, message);
await _queue.ApplyDecision(message.Decision, message);
if (message.Decision.Allow && message.Decision.PutBack == PutBackDecision.No)
{
_queue.Info.AddMessageRemove();
_ = _queue.DeliveryHandler.MessageDequeued(_queue, message);
}
return(PushResult.Success);
}
private async Task <PushResult> ProcessMessage(QueueMessage message)
{
//if there are not receivers, complete send operation
List <QueueClient> clients = _queue.ClientsClone;
if (clients.Count == 0)
{
_queue.Info.AddMessageRemove();
return(PushResult.NoConsumers);
}
message.Decision = await _queue.DeliveryHandler.BeginSend(_queue, message);
if (!await _queue.ApplyDecision(message.Decision, message))
{
return(PushResult.Success);
}
//create prepared message data
byte[] messageData = HmqWriter.Create(message.Message);
bool messageIsSent = false;
//to all receivers
foreach (QueueClient client in clients)
{
//to only online receivers
if (!client.Client.IsConnected)
{
continue;
}
//call before send and check decision
Decision ccrd = await _queue.DeliveryHandler.CanConsumerReceive(_queue, message, client.Client);
if (!ccrd.Allow)
{
continue;
}
//send the message
_ = client.Client.SendAsync(messageData);
messageIsSent = true;
//do after send operations for per message
_queue.Info.AddDelivery();
}
//after all sending operations completed, calls implementation send completed method and complete the operation
if (messageIsSent)
{
_queue.Info.AddMessageSend();
}
message.Decision = await _queue.DeliveryHandler.EndSend(_queue, message);
await _queue.ApplyDecision(message.Decision, message);
if (message.Decision.Allow && message.Decision.PutBack == PutBackDecision.No)
{
_queue.Info.AddMessageRemove();
}
return(PushResult.Success);
}
