public Task InterceptSubscriptionAsync(
MqttSubscriptionInterceptorContext context)
{
if (context == null)
{
return(Task.CompletedTask);
}
if (context.TopicFilter.Topic.StartsWith("platooning/broadcast/"))
{
var tree = context.TopicFilter.Topic.Split('/');
//var plotooningId = context.TopicFilter.Topic.Replace("platooning/broadcast/", "");
var platoon = tree.Length > 2 ? _repo.GetPlatoonById(tree[2]) : null;
if (platoon == null)
{
context.AcceptSubscription = false;
context.CloseConnection = true;
_logger.LogInformation(
$"Reject for not found platoonId on our system | ClientId = {context.ClientId}, TopicFilter = {context.TopicFilter},"
+ $" AcceptSubscription = {context.AcceptSubscription}, SessionItems = {context.SessionItems}");
}
try
{
if (_repo.GetPlatoon(context.ClientId) == null)
{
context.AcceptSubscription = false;
context.CloseConnection = true;
_logger.LogInformation(
$"Reject for not found joined ClientId = {context.ClientId}, TopicFilter = {context.TopicFilter},"
+ $" AcceptSubscription = {context.AcceptSubscription}, SessionItems = {context.SessionItems}");
}
}
catch (Exception exception)
{
context.AcceptSubscription = false;
context.CloseConnection = true;
_repo.AddLogAsync(new Log()
{
Exception =
$"Close connection for subscriptions Exception MqttSubscriptionInterceptorContext = {exception.StackTrace}",
CreationDate = DateTime.Now
});
_logger.LogError($"Close connection for subscriptions Exception MqttSubscriptionInterceptorContext = {exception.StackTrace}");
}
}
context.AcceptSubscription = true;
_logger.LogInformation(
$"New Subcription: ClientId = {context.ClientId}, TopicFilter = {context.TopicFilter},"
+ $" AcceptSubscription = {context.AcceptSubscription}, SessionItems = {context.SessionItems}");
return(Task.CompletedTask);
}
public async Task StartAsync(
CancellationToken cancellationToken)
{
_appLifetime.ApplicationStarted.Register(OnStarted);
_appLifetime.ApplicationStopping.Register(OnStopping);
_appLifetime.ApplicationStopped.Register(OnStopped);
using var scope = _serviceProvider.CreateScope();
var serverBuilder = scope.ServiceProvider.GetRequiredService <IServerBuilder>();
var options = serverBuilder.GetOptionsBuilder(_interceptor, _messageInterceptor);
Server = serverBuilder.GetServer();
await Server.StartAsync(options.Build());
Server.StartedHandler = new MqttServerStartedHandlerDelegate(e =>
{
Console.WriteLine("Mqtt Broker start " + e);
});
Server.StoppedHandler = new MqttServerStoppedHandlerDelegate(e =>
{
Console.WriteLine("Mqtt Broker stop " + e);
});
Server.ClientSubscribedTopicHandler = new MqttServerClientSubscribedHandlerDelegate(e =>
{
var vehicleId = e.TopicFilter.Topic
.Replace("platooning/", "").Replace("/#", "");
_logger.LogInformation("Client subscribed " + e.ClientId + " topic " + e.TopicFilter.Topic + "Vehicle Id " +
vehicleId);
try
{
var audit = new Audit
{
ClientId = e.ClientId,
Type = "Sub",
Topic = e.TopicFilter.Topic,
Payload = JsonConvert.SerializeObject(e.TopicFilter, Formatting.Indented)
};
_repo.AddAudit(audit);
var sub = _repo.GetSubscribeByTopic(e.ClientId, e.TopicFilter.Topic,
e.TopicFilter.QualityOfServiceLevel.ToString());
if (sub != null)
{
_logger.LogInformation($"There is a subcribe like ClientID {e.ClientId}.");
return;
}
var subClient = new Subscribe
{
Topic = e.TopicFilter.Topic,
Enable = true,
ClientId = e.ClientId,
QoS = e.TopicFilter.QualityOfServiceLevel.ToString()
};
_repo.AddSubscribe(subClient);
}
catch (Exception exception)
{
var log = new Log
{
Exception = exception.StackTrace
};
_repo.AddLogAsync(log);
_logger.LogError("Error = MqttServerClientSubscribedHandlerDelegate ", exception.StackTrace);
}
finally
{
_repo.SaveChangesAsync(cancellationToken);
}
});
Server.ClientUnsubscribedTopicHandler = new MqttServerClientUnsubscribedTopicHandlerDelegate(e =>
{
try
{
var clientId = e.ClientId;
var topicFilter = e.TopicFilter;
_logger.LogInformation($"[{DateTime.Now}] Client '{clientId}' un-subscribed to {topicFilter}.");
try
{
var sub = _repo.GetSubscribeById(e.ClientId).Where(s => s.Topic == topicFilter);
var subscribes = sub as List <Subscribe> ?? sub.ToList();
if (subscribes.All(a => a.Topic != topicFilter))
{
return;
}
subscribes
.ForEach(a => a.Enable = false);
}
catch (Exception exception)
{
var log = new Log
{
Exception = exception.StackTrace
};
_repo.AddLogAsync(log);
_logger.LogError("Error = MqttServerClientSubscribedHandlerDelegate ", exception.StackTrace);
Console.WriteLine(exception);
}
}
catch (Exception ex)
{
Console.WriteLine($"[{DateTime.Now}] Client get error " + ex.Message);
}
finally
{
_repo.SaveChangesAsync(cancellationToken);
}
});
Server.ApplicationMessageReceivedHandler = new MqttApplicationMessageReceivedHandlerDelegate(e =>
{
try
{
var payload = Functions.GetPayload(e.ApplicationMessage.Payload);
var payloadser = JsonConvert.SerializeObject(payload, Formatting.Indented);
var tree = e.ApplicationMessage.Topic.Split('/');
var audit = new Audit
{
ClientId = e.ClientId,
Type = "Pub",
Topic = e.ApplicationMessage.Topic,
Payload = payloadser
};
_repo.AddAudit(audit);
if (e.ClientId == null)
{
var log = new Log
{
Exception = new string("Broker publish message itself " +
payloadser + " " +
e.ClientId)
};
_repo.AddLogAsync(log);
//_repo.SaveChangesAsync(cancellationToken);
return;
}
if (!tree.First().Contains("platooning"))
{
var log = new Log
{
Exception = new string("Mqtt broker just only response with starting \"platoon\" " +
payloadser + " " +
e.ClientId)
};
_repo.AddLogAsync(log);
//_repo.SaveChangesAsync(cancellationToken);
return;
}
if (payload.PlatoonDissolveStatus)
{
if (_repo.GetPlatoon().Any(a => a.ClientId == e.ClientId && a.IsLead))
{
Console.WriteLine(
$"[{DateTime.Now}] This is lead Vehicle PlatoonDissolveStatus is true all platoon infor must be deleted" +
" Client Id " + e.ClientId + " payload " +
payload);
var platoonlist = _repo.GetPlatoon().Where(a => a.IsFollower);
var platoonlistArray = platoonlist as Platoon[] ?? platoonlist.ToArray();
foreach (var platoon in platoonlistArray)
{
Server.UnsubscribeAsync(platoon.ClientId, "platooning/broadcast/" + platoon.PlatoonRealId);
Server.UnsubscribeAsync(platoon.ClientId, "platooning/" + platoon.ClientId);
}
_repo.DeletePlatoonRange(platoonlistArray);
}
else
{
Console.WriteLine(
$"[{DateTime.Now}] This is following Vehicle PlatoonDissolveStatus is true all platoon infor must be deleted" +
" Client Id " + e.ClientId + " payload " +
payload);
var followingVehicle = _repo.GetPlatoon().FirstOrDefault(a => a.IsFollower && a.ClientId == e.ClientId);
Server.UnsubscribeAsync(followingVehicle.ClientId, "platooning/" + followingVehicle.ClientId);
_repo.DeletePlatoon(followingVehicle);
}
}
if (payload.Maneuver == Maneuver.CreatePlatoon)
{
if (tree.Length != 4)
{
var log = new Log
{
Exception = new string("For creating platoon, topic must 4 length 1. \"platooning\" " +
" 2. \"message\" " +
" 3. \"leadvehicleID\" " +
" 4. \"platoonID\" " +
" payload " +
payloadser + " " +
" client ID " + e.ClientId +
" topic " + e.ApplicationMessage.Topic)
};
_repo.AddLogAsync(log);
//_repo.SaveChangesAsync(cancellationToken);
return;
}
var platoonId = tree[3];
var platoonList = _repo.GetPlatoon().ToList();
var leadVehicleId = tree[2];
var leadVehicle = _repo.GetSubscribeById(leadVehicleId);
var pla = platoonList
.FirstOrDefault(f => f.Enable && f.PlatoonRealId == platoonId);
if (leadVehicle != null && pla == null)
{
var platoon = new Platoon()
{
Enable = true,
ClientId = e.ClientId,
IsLead = true,
VechicleId = tree[2],
PlatoonRealId = tree[3]
};
_repo.AddPlatoon(platoon);
Console.WriteLine($"[{DateTime.Now}] Creating new Platoon Client Id " + e.ClientId +
" platooning Id" + platoon.PlatoonRealId + " payload " + payloadser);
}
else
{
Console.WriteLine($"[{DateTime.Now}] Platoon is already created Client Id " + e.ClientId +
" platooning Id" + platoonId + " payload " + payloadser);
}
}
else if (payload.Maneuver == Maneuver.JoinRequest)
{
if (tree.Length != 3)
{
var log = new Log
{
Exception = new string("For joining platoon, topic must 3 length 1. \"platooning\" " +
" 2. \"message\" " +
" 3. \"followingVehicleId\" " +
" 4. \"#\" " +
" payload " +
payloadser + " " +
" client ID " + e.ClientId +
" topic " + e.ApplicationMessage.Topic)
};
_repo.AddLogAsync(log);
//_repo.SaveChangesAsync();
return;
}
var isFollowing = _repo.GetPlatoon()
.FirstOrDefault(f => f.IsFollower && f.VechicleId == tree[2] && f.Enable);
if (isFollowing != null)
{
return;
}
var platoonLead = _repo.GetPlatoon().FirstOrDefault(f => f.IsLead && f.Enable);
if (platoonLead != null)
{
var platoon = new Platoon()
{
Enable = false,
ClientId = e.ClientId,
IsLead = false,
IsFollower = true,
VechicleId = tree[2],
PlatoonRealId = platoonLead.PlatoonRealId
};
_repo.AddPlatoon(platoon);
Console.WriteLine($"[{DateTime.Now}] Join Platoon Client Id " + e.ClientId +
" platooning Id" + platoon.PlatoonRealId + " payload " + payloadser);
var message = new BitArray(_dataLenght);
message.Set(0, false);
message.Set(1, false);
message.Set(2, true);
Server.PublishAsync("platooning/" + platoonLead.ClientId + "/" + tree[2],
Encoding.ASCII.GetString(Functions.BitArrayToByteArray(message)));
}
}
else if (payload.Maneuver == Maneuver.JoinAccepted)
{
Console.WriteLine($"[{DateTime.Now}] Join accepted Client Id " + e.ClientId + " payload " +
payloadser);
var followvehicleId = tree[1];
var leadVehicle = tree[2];
var plattonId = tree[3];
var allplatoon = _repo.GetPlatoon();
if (allplatoon != null)
{
var enumerable = allplatoon as Platoon[] ?? allplatoon.ToArray();
var platoonfollow = enumerable.FirstOrDefault(f => f.IsFollower && f.ClientId == followvehicleId);
if (platoonfollow != null)
{
platoonfollow.Enable = true;
platoonfollow.PlatoonRealId = plattonId;
_repo.UpdatePlatoon(platoonfollow);
}
else
{
var platoonlead = enumerable
.FirstOrDefault(f => f.IsLead && f.Enable && f.ClientId == leadVehicle);
if (platoonlead != null)
{
var platoon = new Platoon()
{
Enable = true,
ClientId = e.ClientId,
IsLead = false,
IsFollower = true,
VechicleId = followvehicleId,
PlatoonRealId = platoonlead.PlatoonRealId
};
_repo.AddPlatoon(platoon);
}
}
}
}
else if (payload.Maneuver == Maneuver.JoinRejected)
{
Console.WriteLine($"[{DateTime.Now}] Join rejected Client Id " + e.ClientId + " payload " +
payloadser);
var platoonfollow = _repo.GetPlatoon()
.FirstOrDefault(f => f.IsFollower && f.ClientId == tree[1]);
if (platoonfollow != null)
{
_repo.DeletePlatoon(platoonfollow);
}
}
else
{
var log = new Log
{
Exception = new string("Unknown Maneuver " +
payloadser + " " +
e.ClientId)
};
_repo.AddLogAsync(log);
}
}
catch (Exception exception)
{
Console.WriteLine(exception);
var log = new Log
{
Exception = exception.StackTrace
};
_repo.AddLogAsync(log);
}
finally
{
_repo.SaveChangesAsync(cancellationToken);
}
OnDataReceived(e.ApplicationMessage.Payload);
});
}
public IEnumerable <Platoon> GetPlatoon()
{
_logger.LogInformation(" getting all platoon");
return(_repo.GetPlatoon().ToArray());
}