//private static void AddErrorReasonToContent(CapReceivedMessage message, Exception exception)
//{
// message.Content = Helper.AddExceptionProperty(message.Content, exception);
//}
private async Task InvokeConsumerMethodAsync(MediumMessage message, ConsumerExecutorDescriptor descriptor, CancellationToken cancellationToken)
{
var consumerContext = new ConsumerContext(descriptor, message.Origin);
var tracingTimestamp = TracingBefore(message.Origin, descriptor.MethodInfo);
try
{
var ret = await Invoker.InvokeAsync(consumerContext, cancellationToken);
TracingAfter(tracingTimestamp, message.Origin, descriptor.MethodInfo);
if (!string.IsNullOrEmpty(ret.CallbackName))
{
var header = new Dictionary <string, string>()
{
[Headers.CorrelationId] = message.Origin.GetId(),
[Headers.CorrelationSequence] = (message.Origin.GetCorrelationSequence() + 1).ToString()
};
await _provider.GetService <ICapPublisher>().PublishAsync(ret.CallbackName, ret.Result, header, cancellationToken);
}
}
catch (OperationCanceledException)
{
//ignore
}
catch (Exception ex)
{
var e = new SubscriberExecutionFailedException(ex.Message, ex);
TracingError(tracingTimestamp, message.Origin, descriptor.MethodInfo, e);
throw e;
}
}
private static ConsumerExecutorDescriptor InitDescriptor(
TopicAttribute attr,
MethodInfo methodInfo,
TypeInfo implType)
{
var descriptor = new ConsumerExecutorDescriptor
{
Attribute = attr,
MethodInfo = methodInfo,
ImplTypeInfo = implType
};
return(descriptor);
}
/// <summary>
/// Attempts to get the topic exector associated with the specified topic name and group name from the <see cref="Entries"/>.
/// </summary>
/// <param name="topicName">The topic name of the value to get.</param>
/// <param name="groupName">The group name of the value to get.</param>
/// <param name="matchTopic">topic exector of the value.</param>
/// <returns>true if the key was found, otherwise false. </returns>
public bool TryGetTopicExector(string topicName, string groupName,
out ConsumerExecutorDescriptor matchTopic)
{
if (Entries == null)
{
throw new ArgumentNullException(nameof(Entries));
}
matchTopic = null;
if (Entries.TryGetValue(groupName, out var groupMatchTopics))
{
matchTopic = groupMatchTopics.FirstOrDefault(x => x.Attribute.Name == topicName);
return(matchTopic != null);
}
return(false);
}
private static ConsumerExecutorDescriptor InitDescriptor(
TopicAttribute attr,
MethodInfo methodInfo,
TypeInfo implType,
TypeInfo serviceTypeInfo,
IList <ParameterDescriptor> parameters)
{
var descriptor = new ConsumerExecutorDescriptor
{
Attribute = attr,
MethodInfo = methodInfo,
ImplTypeInfo = implType,
ServiceTypeInfo = serviceTypeInfo,
Parameters = parameters
};
return(descriptor);
}
public async Task <OperateResult> DispatchAsync(MediumMessage message, ConsumerExecutorDescriptor descriptor, CancellationToken cancellationToken)
{
bool retry;
OperateResult result;
do
{
var executedResult = await ExecuteWithoutRetryAsync(message, descriptor, cancellationToken);
result = executedResult.Item2;
if (result == OperateResult.Success)
{
return(result);
}
retry = executedResult.Item1;
} while (retry);
return(result);
}
/// <summary>
/// Attempts to get the topic executor associated with the specified topic name and group name from the
/// <see cref="Entries" />.
/// </summary>
/// <param name="topicName">The topic name of the value to get.</param>
/// <param name="groupName">The group name of the value to get.</param>
/// <param name="matchTopic">topic executor of the value.</param>
/// <returns>true if the key was found, otherwise false. </returns>
public bool TryGetTopicExecutor(string topicName, string groupName,
out ConsumerExecutorDescriptor matchTopic)
{
if (Entries == null)
{
throw new ArgumentNullException(nameof(Entries));
}
matchTopic = null;
if (Entries.TryGetValue(groupName, out var groupMatchTopics))
{
matchTopic = _selector.SelectBestCandidate(topicName, groupMatchTopics);
return(matchTopic != null);
}
return(false);
}
private ConsumerExecutorDescriptor InitDescriptor(
TopicAttribute attr,
MethodInfo methodInfo,
TypeInfo implType,
TypeInfo serviceTypeInfo,
IList <ParameterDescriptor> parameters,
TopicAttribute classAttr = null)
{
var descriptor = new ConsumerExecutorDescriptor
{
Attribute = attr,
ClassAttribute = classAttr,
MethodInfo = methodInfo,
ImplTypeInfo = implType,
ServiceTypeInfo = serviceTypeInfo,
Parameters = parameters,
TopicNamePrefix = _capOptions.TopicNamePrefix
};
return(descriptor);
}
private async Task <(bool, OperateResult)> ExecuteWithoutRetryAsync(MediumMessage message, ConsumerExecutorDescriptor descriptor, CancellationToken cancellationToken)
{
if (message == null)
{
throw new ArgumentNullException(nameof(message));
}
cancellationToken.ThrowIfCancellationRequested();
try
{
var sp = Stopwatch.StartNew();
await InvokeConsumerMethodAsync(message, descriptor, cancellationToken);
sp.Stop();
await SetSuccessfulState(message);
_logger.ConsumerExecuted(sp.Elapsed.TotalMilliseconds);
return(false, OperateResult.Success);
}
catch (Exception ex)
{
_logger.LogError(ex, $"An exception occurred while executing the subscription method. Topic:{message.Origin.GetName()}, Id:{message.DbId}");
return(await SetFailedState(message, ex), OperateResult.Failed(ex));
}
}
/// <summary>
/// create a new instance of <see cref="ConsumerContext" /> .
/// </summary>
/// <param name="descriptor">consumer method descriptor. </param>
/// <param name="message"> received message.</param>
public ConsumerContext(ConsumerExecutorDescriptor descriptor, MessageContext message)
{
ConsumerDescriptor = descriptor ?? throw new ArgumentNullException(nameof(descriptor));
DeliverMessage = message ?? throw new ArgumentNullException(nameof(message));
}