//ILogger _logger;
public ReturnItem SendMail(Request req)
{
var validationErrors = InputValidator.ValidateInputs(req);
if (validationErrors.Count == 0)
{
var retCode = PrimaryClient.SendMail(req);
if (retCode.RetCode == 1)
{
return(retCode);
}
else
{
return(RetryHandler.Retry(req, ScondaryClientList, retCode.Message));
}
}
else
{
return(new ReturnItem
{
Message = string.Join(";", validationErrors.ToArray()),
RetCode = 3
});
}
}
public async Task DisconnectAsync(CancellationToken cancellationToken)
{
var cancelToken = cancellationToken != null ? cancellationToken : CancellationToken.None;
var disconnectOptions = new MqttClientDisconnectOptions {
ReasonString = "Bridge disconnect"
};
await PrimaryClient.DisconnectAsync(disconnectOptions, cancelToken);
await SecondaryClient.DisconnectAsync(disconnectOptions, cancelToken);
}
/// <summary>
/// Configures circuit breaker.
/// </summary>
private void ConfigureCircuitBreaker()
{
void OnBreak(Exception exception, TimeSpan timespan)
{
//recreate secondary sender
if (SecondaryClient == null)
{
SecondaryClient = CreateClient(_secondaryServiceBusConnectionString);
}
//kill primary sender
PrimaryClient.CloseAsync().ConfigureAwait(false).GetAwaiter().GetResult();
PrimaryClient = null;
_logger?.LogWarning(exception, "Switched from primary to secondary service bus sender");
}
void OnHalfOpen()
{
//recreate primary sender
if (PrimaryClient == null)
{
PrimaryClient = CreateClient(_primaryServiceBusConnectionString);
}
//kill secondary
SecondaryClient.CloseAsync().ConfigureAwait(false).GetAwaiter().GetResult();
SecondaryClient = null;
_logger?.LogWarning("Switched back from secondary to primary service bus sender");
}
void OnReset()
{
_logger?.LogInformation("Circuit breaker was reset.");
}
_circuitBreaker = Policy
.Handle <Exception>()
.CircuitBreakerAsync(ExceptionsAllowedBeforeBreaking, TimeSpan.FromMilliseconds(TimeOutIfBreaksInMilliseconds), OnBreak, OnReset, OnHalfOpen);
}
public async Task <MQTTnet.Client.Connecting.MqttClientAuthenticateResult> ConnectAsync(CancellationToken cancellationToken)
{
var cancelToken = cancellationToken != null ? cancellationToken : CancellationToken.None;
MqttClientAuthenticateResult connectPrimary = null;
if (!PrimaryClient.IsConnected)
{
PrimaryClient.UseConnectedHandler(async e =>
{
var primaryFilters = Options.PrimaryFilters != null && Options.PrimaryFilters.Any()
? Options.PrimaryFilters
: new TopicFilter[] { new TopicFilterBuilder().WithTopic("#").Build() };
await PrimaryClient.SubscribeAsync(primaryFilters);
});
connectPrimary = await PrimaryClient.ConnectAsync(Options.PrimaryOptions, cancelToken);
if (connectPrimary.ResultCode != MqttClientConnectResultCode.Success)
{
throw new ArgumentException("PrimaryOptions, could not connect to primary server.");
}
}
if (!SecondaryClient.IsConnected)
{
var connectSecondary = await SecondaryClient.ConnectAsync(Options.SecondaryOptions, cancelToken);
if (connectSecondary.ResultCode != MqttClientConnectResultCode.Success)
{
throw new ArgumentException("SecondaryOptions, could not connect to secondary server.");
}
}
PrimaryClient.UseDisconnectedHandler(async e =>
{
var connectRetry = Policy
.Handle <Exception>()
.WaitAndRetryForeverAsync(
retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)),
(exception, timespan) =>
{
Console.WriteLine("### DISCONNECTED FROM SERVER ###");
});
await connectRetry.ExecuteAsync(async() => {
var response = await PrimaryClient.ConnectAsync(Options.PrimaryOptions, cancelToken);
Console.Write($"{response.ResultCode} {response.ReasonString}");
});
});
SecondaryClient.UseDisconnectedHandler(async e =>
{
var connectRetry = Policy
.Handle <Exception>()
.WaitAndRetryForeverAsync(
retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)),
(exception, timespan) =>
{
Console.WriteLine("### DISCONNECTED FROM SERVER ###");
});
await connectRetry.ExecuteAsync(async() => {
var response = await SecondaryClient.ConnectAsync(Options.SecondaryOptions, cancelToken);
Console.Write($"{response.ResultCode} {response.ReasonString}");
});
});
PrimaryClient.UseApplicationMessageReceivedHandler(e =>
{
var message = new MqttApplicationMessageBuilder()
.WithTopic(e.ApplicationMessage.Topic)
.WithPayload(e.ApplicationMessage.Payload);
if (e.ApplicationMessage.Retain)
{
message = message.WithRetainFlag();
}
switch (e.ApplicationMessage.QualityOfServiceLevel)
{
case MqttQualityOfServiceLevel.ExactlyOnce:
message = message.WithExactlyOnceQoS();
break;
case MqttQualityOfServiceLevel.AtLeastOnce:
message = message.WithAtLeastOnceQoS();
break;
case MqttQualityOfServiceLevel.AtMostOnce:
message = message.WithAtMostOnceQoS();
break;
default:
throw new ArgumentOutOfRangeException();
}
Task.Run(() => SecondaryClient.PublishAsync(message.Build(), cancelToken), cancelToken);
});
if (Options.SyncMode)
{
SecondaryClient.UseConnectedHandler(async e =>
{
var secondaryFilters = Options.SecondaryFilters != null && Options.SecondaryFilters.Any()
? Options.SecondaryFilters
: new TopicFilter[] { new TopicFilterBuilder().WithTopic("#").Build() };
await SecondaryClient.SubscribeAsync(secondaryFilters);
});
SecondaryClient.UseApplicationMessageReceivedHandler(e =>
{
var message = new MqttApplicationMessageBuilder()
.WithTopic(e.ApplicationMessage.Topic)
.WithPayload(e.ApplicationMessage.Payload);
if (e.ApplicationMessage.Retain)
{
message = message.WithRetainFlag();
}
switch (e.ApplicationMessage.QualityOfServiceLevel)
{
case MqttQualityOfServiceLevel.ExactlyOnce:
message = message.WithExactlyOnceQoS();
break;
case MqttQualityOfServiceLevel.AtLeastOnce:
message = message.WithAtLeastOnceQoS();
break;
case MqttQualityOfServiceLevel.AtMostOnce:
message = message.WithAtMostOnceQoS();
break;
default:
throw new ArgumentOutOfRangeException();
}
Task.Run(() => PrimaryClient.PublishAsync(message.Build(), cancelToken), cancelToken);
});
}
return(connectPrimary);
}
/// <summary>
/// Cleans up (un)managed resources.
/// </summary>
/// <param name="disposing"></param>
protected virtual void Dispose(bool disposing)
{
PrimaryClient?.CloseAsync().ConfigureAwait(false).GetAwaiter().GetResult();
SecondaryClient?.CloseAsync().ConfigureAwait(false).GetAwaiter().GetResult();
}
