public static async Task <MqttClientSubscribeResult> SubscribeAsync(this IMqttPersisterConnection persisterConnection, string topic, CancellationToken cancellationToken = default)
{
if (await persisterConnection.TryConnectAsync(afterDisconnection: false, cancellationToken))
{
return(await persisterConnection.GetClient().SubscribeAsync(topic));
}
return(null);
}
public static async Task <bool> TryRegisterMessageHandlerAsync(this IMqttPersisterConnection persisterConnection, Func <MqttApplicationMessageReceivedEventArgs, Task> handler, CancellationToken cancellationToken = default)
{
if (await persisterConnection.TryConnectAsync(afterDisconnection: false, cancellationToken))
{
persisterConnection.GetClient().UseApplicationMessageReceivedHandler(handler);
return(true);
}
return(false);
}
public async Task OnConnectionLostAsync(IMqttPersisterConnection connection, MqttClientConnectionEventArgs args)
{
if (args != null && args.IsReConnected)
{
if (args.DisconnectReason == Client.Disconnecting.MqttClientDisconnectReason.NormalDisconnection)
{
await ReSubscribeAllAsync();
}
}
}
public MqttEventBus(IMqttPersisterConnection persistentConnection, ILogger <MqttEventBus> logger,
IServiceScopeFactory scopeFactory, IEventBusSubscriptionsManager subsManager, int retryCount = 5)
{
_persistentConnection = persistentConnection ?? throw new ArgumentNullException(nameof(persistentConnection));
_logger = logger ?? throw new ArgumentNullException(nameof(logger));
_subsManager = subsManager ?? new InMemoryEventBusSubscriptionsManager();
_mqttClient = _persistentConnection.GetClient();
_mqttClient.UseApplicationMessageReceivedHandler(e => Consumer_Received(e));
_retryCount = retryCount;
_scopeFactory = scopeFactory;
//_subsManager.OnEventRemoved += SubsManager_OnEventRemoved;
}
public MqttEventBus(
IMqttPersisterConnection mqttPersisterConnection,
IEventProvider eventProvider,
IConsumeMethodInvoker consumeMethodInvoker,
IEventBusLogger <MqttEventBus> logger,
IServiceScopeFactory scopeFactory,
ISubscriptionsManager subsManager,
BusOptions busOptions)
{
_mqttPersisterConnection = mqttPersisterConnection ?? throw new ArgumentNullException(nameof(mqttPersisterConnection));
_mqttPersisterConnection.ClientConnectionChanged += OnConnectionLostAsync;
_eventProvider = eventProvider;
_consumeMethodInvoker = consumeMethodInvoker;
_logger = logger ?? throw new ArgumentNullException(nameof(logger));
_subsManager = subsManager ?? throw new ArgumentNullException(nameof(ISubscriptionsManager));
_retryCount = busOptions?.RetryCount ?? 5;
_scopeFactory = scopeFactory;
_asyncLocker = new SemaphoreSlim(busOptions.MaxConcurrentCalls, busOptions.MaxConcurrentCalls);
}