public async Task Handle(MqClient client, TmqMessage message)
{
//to prevent receive same message from instanced server that already sent from this server
if (client.IsInstanceServer)
{
return;
}
//if server is not set or there is no connected server
if (_server.ServerAuthenticator == null || _server.InstanceConnectors.Length == 0)
{
return;
}
byte[] mdata = await _writer.Create(message);
foreach (TmqStickyConnector connector in _server.InstanceConnectors)
{
bool grant = await _server.ServerAuthenticator.CanReceive(connector.GetClient(), message);
if (grant)
{
connector.Send(mdata);
}
}
}
/// <summary>
///
/// </summary>
public async Task <TmqServerSocket> Connected(ITwinoServer server, IConnectionInfo connection, ConnectionData data)
{
string clientId;
bool found = data.Properties.TryGetValue(TmqHeaders.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(await _writer.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(TmqHeaders.CLIENT_TOKEN);
client.Name = data.Properties.GetStringValue(TmqHeaders.CLIENT_NAME);
client.Type = data.Properties.GetStringValue(TmqHeaders.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 Handle(MqClient client, TmqMessage message)
{
//if server is not set or there is no connected server
if (_server.NodeServer.Connectors.Length == 0)
{
return;
}
byte[] mdata = await _writer.Create(message);
foreach (TmqStickyConnector connector in _server.NodeServer.Connectors)
{
bool grant = _server.NodeServer.Authenticator == null || await _server.NodeServer.Authenticator.CanReceive(connector.GetClient(), message);
if (grant)
{
connector.Send(mdata);
}
}
}
/// <summary>
/// Called when a new client is connected via TMQ protocol
/// </summary>
public async Task <TmqServerSocket> Connected(ITwinoServer server, IConnectionInfo connection, ConnectionData data)
{
string clientId;
bool found = data.Properties.TryGetValue(TmqHeaders.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(await _writer.Create(MessageBuilder.Busy()));
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(TmqHeaders.CLIENT_TOKEN);
client.Name = data.Properties.GetStringValue(TmqHeaders.CLIENT_NAME);
client.Type = data.Properties.GetStringValue(TmqHeaders.CLIENT_TYPE);
//connecting client is a MQ server
string serverValue = data.Properties.GetStringValue(TmqHeaders.TWINO_MQ_SERVER);
if (!string.IsNullOrEmpty(serverValue) && (serverValue.Equals("1") || serverValue.Equals("true", StringComparison.InvariantCultureIgnoreCase)))
{
if (_server.ServerAuthenticator == null)
{
return(null);
}
bool accepted = await _server.ServerAuthenticator.Authenticate(_server, client);
if (!accepted)
{
return(null);
}
client.IsInstanceServer = true;
_server.SlaveInstances.Add(new SlaveInstance
{
ConnectedDate = DateTime.UtcNow,
Client = client,
RemoteHost = client.Info.Client.Client.RemoteEndPoint.ToString().Split(':')[0]
});
await client.SendAsync(MessageBuilder.Accepted(client.UniqueId));
}
//connecting client is a producer/consumer client
else
{
//authenticates client
if (_server.Authenticator != null)
{
client.IsAuthenticated = await _server.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));
if (_server.ClientHandler != null)
{
await _server.ClientHandler.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.RequestAcknowledge)
{
ackDeadline = DateTime.UtcNow.Add(_queue.Options.AcknowledgeTimeout);
}
//if there are not receivers, complete send operation
List <ChannelClient> clients = _queue.Channel.ClientsClone;
if (clients.Count == 0)
{
_queue.AddMessage(message, false);
return(PushResult.NoConsumers);
}
//if to process next message is requires previous message acknowledge, wait here
if (_queue.Options.RequestAcknowledge && _queue.Options.WaitForAcknowledge)
{
await _queue.WaitForAcknowledge(message);
}
message.Decision = await _queue.DeliveryHandler.BeginSend(_queue, message);
if (!await _queue.ApplyDecision(message.Decision, message))
{
return(PushResult.Success);
}
//create prepared message data
byte[] messageData = await _writer.Create(message.Message);
Decision final = new Decision(false, false, false, DeliveryAcknowledgeDecision.None);
bool messageIsSent = false;
//to all receivers
foreach (ChannelClient client in clients)
{
//to only online receivers
if (!client.Client.IsConnected)
{
continue;
}
//somehow if code comes here (it should not cuz of last "break" in this foreach, break
if (!message.Message.FirstAcquirer && _queue.Options.SendOnlyFirstAcquirer)
{
break;
}
//call before send and check decision
Decision ccrd = await _queue.DeliveryHandler.CanConsumerReceive(_queue, message, client.Client);
final = ChannelQueue.CreateFinalDecision(final, ccrd);
if (!ccrd.Allow)
{
continue;
}
//create delivery object
MessageDelivery delivery = new MessageDelivery(message, client, ackDeadline);
delivery.FirstAcquirer = message.Message.FirstAcquirer;
//send the message
bool sent = client.Client.Send(messageData);
if (sent)
{
messageIsSent = true;
//adds the delivery to time keeper to check timing up
_queue.TimeKeeper.AddAcknowledgeCheck(delivery);
//set as sent, if message is sent to it's first acquirer,
//set message first acquirer false and re-create byte array data of the message
bool firstAcquirer = message.Message.FirstAcquirer;
//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 = ChannelQueue.CreateFinalDecision(final, d);
//if we are sending to only first acquirer, break
if (_queue.Options.SendOnlyFirstAcquirer && firstAcquirer)
{
break;
}
if (firstAcquirer && clients.Count > 1)
{
messageData = await _writer.Create(message.Message);
}
}
else
{
Decision d = await _queue.DeliveryHandler.ConsumerReceiveFailed(_queue, delivery, client.Client);
final = ChannelQueue.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.KeepMessage)
{
_queue.Info.AddMessageRemove();
_ = _queue.DeliveryHandler.MessageRemoved(_queue, message);
}
return(PushResult.Success);
}
private async Task <PushResult> ProcessMessage(QueueMessage message, ChannelClient receiver)
{
//if we need acknowledge from receiver, it has a deadline.
DateTime?deadline = null;
if (_queue.Options.RequestAcknowledge)
{
deadline = DateTime.UtcNow.Add(_queue.Options.AcknowledgeTimeout);
}
//if to process next message is requires previous message acknowledge, wait here
if (_queue.Options.RequestAcknowledge && _queue.Options.WaitForAcknowledge)
{
await _queue.WaitForAcknowledge(message);
}
message.Decision = await _queue.DeliveryHandler.BeginSend(_queue, message);
if (!await _queue.ApplyDecision(message.Decision, message))
{
return(PushResult.Success);
}
//create prepared message data
byte[] messageData = await _writer.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);
delivery.FirstAcquirer = message.Message.FirstAcquirer;
//send the message
bool sent = receiver.Client.Send(messageData);
if (sent)
{
//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.KeepMessage)
{
_queue.Info.AddMessageRemove();
_ = _queue.DeliveryHandler.MessageRemoved(_queue, message);
}
return(PushResult.Success);
}
/// <summary>
/// Called when a new client is connected via TMQ protocol
/// </summary>
public async Task <TmqServerSocket> Connected(ITwinoServer server, IConnectionInfo connection, ConnectionData data)
{
string clientId;
bool found = data.Properties.TryGetValue(TmqHeaders.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(await _writer.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(TmqHeaders.CLIENT_TOKEN);
client.Name = data.Properties.GetStringValue(TmqHeaders.CLIENT_NAME);
client.Type = data.Properties.GetStringValue(TmqHeaders.CLIENT_TYPE);
//authenticates client
if (_server.Authenticator != null)
{
client.IsAuthenticated = await _server.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));
if (_server.ClientHandler != null)
{
await _server.ClientHandler.Connected(_server, client);
}
return(client);
}
