private async ValueTask ProcessMessageHandlingExceptionAsync(IMessageScope scope, IMessageHandlerFactory asyncHandlerFactory, Type messageType, IMessage message, List <Exception> exceptions)
{
var asyncEventHandler = asyncHandlerFactory.GetHandler(scope);
try
{
if (asyncEventHandler == null)
{
throw new ArgumentNullException($"Registered async message handler for message type {messageType.Name} is null!");
}
var asyncHandlerType = typeof(IAsyncMessageHandler <>).MakeGenericType(messageType);
var method = asyncHandlerType.GetMethod(
nameof(IAsyncMessageHandler <IMessage> .HandleMessageAsync),
new[] { messageType }
);
await(ValueTask) method.Invoke(asyncEventHandler, new object[] { message });
}
catch (TargetInvocationException ex)
{
exceptions.Add(ex.InnerException);
}
catch (Exception ex)
{
exceptions.Add(ex);
}
finally
{
asyncHandlerFactory.ReleaseHandler(scope, asyncEventHandler);
}
}
private async ValueTask ProcessRichMessageHandlingExceptionAsync(IMessageScope scope, IMessageHandlerFactory asyncHandlerFactory, Type messageType, IMessage message, IRichMessageDescriptor descriptor, List <Exception> exceptions)
{
var handlerInstance = asyncHandlerFactory.GetHandler(scope);
try
{
if (handlerInstance == null)
{
throw new ArgumentNullException($"Registered async rich message handler for message type {messageType.Name} is null!");
}
var ifType = typeof(IAsyncRichMessageHandler <>).MakeGenericType(messageType);
var method = ifType.GetMethod(
nameof(IAsyncRichMessageHandler <IMessage> .HandleMessageAsync),
new[] { messageType, typeof(IRichMessageDescriptor) }
);
await(ValueTask) method.Invoke(handlerInstance, new object[] { message, descriptor });
}
catch (TargetInvocationException ex)
{
exceptions.Add(ex.InnerException);
}
catch (Exception ex)
{
exceptions.Add(ex);
}
finally
{
asyncHandlerFactory.ReleaseHandler(scope, handlerInstance);
}
}
private void ProcessMessageHandlingException(IMessageScope scope, IMessageHandlerFactory handlerFactory, Type messageType, IMessage message, List <Exception> exceptions)
{
var eventHandler = handlerFactory.GetHandler(scope);
try
{
if (eventHandler == null)
{
throw new ArgumentNullException($"Registered message handler for message type {messageType.Name} is null!");
}
var handlerType = typeof(IMessageHandler <>).MakeGenericType(messageType);
var method = handlerType.GetMethod(
nameof(IMessageHandler <IMessage> .HandleMessage),
new[] { messageType }
);
method.Invoke(eventHandler, new object[] { message });
}
catch (TargetInvocationException ex)
{
exceptions.Add(ex.InnerException);
}
catch (Exception ex)
{
exceptions.Add(ex);
}
finally
{
handlerFactory.ReleaseHandler(scope, eventHandler);
}
}
internal string Respond(Stream requestBody, ConfigureModel persistable, string provider)
{
var requestXml = new StreamReader(requestBody).ReadToEnd();
//Hack to Log Xml as Exception.
new LogEvent(requestXml).Raise();
Console.WriteLine(requestXml);
return(_messageHandlerFactory.GetHandler(requestXml, provider).HandleResponse(requestXml, persistable));
}
private async Task HandleNextMessageAsync(string messageEnvelopeAsString)
{
try
{
var payload = JsonConvert.DeserializeObject <MessageBrokerEnvelope <NewOrderDto> >(messageEnvelopeAsString);
var handler = _messageHandlerFactory.GetHandler(MessageTypes.NewOrder);
await handler.ExecuteAsync(payload);
}
catch (Exception ex)
{
throw new Exception("Message processing failed.", ex);
}
}
private IMessageHandler GetHandler(IMessage message)
{
Contract.Requires(message != null);
Contract.Ensures(Contract.Result <IMessageHandler>() != null);
try
{
// get handler from factory
return(_handlerFactory.GetHandler(message.GetType()));
}
catch (Exception e)
{
// rethrow exception has a message handling exception
throw new MessageHandlingException(message, e, "Could not get a message handler for message.");
}
}
public async ValueTask <bool> CallAsync(IMessageScope scope, IMessageHandlerFactory handlerFactory, IMessage message, IRichMessageDescriptor messageDescriptor, List <Exception> exceptions = null, CancellationToken cancellationToken = default)
{
var handlerDescriptor = handlerFactory.GetHandlerDescriptor();
IMessageHandler handler = null;
try
{
handler = handlerFactory.GetHandler(scope);
if (handlerDescriptor.IsAsync)
{
await GetOrCreateAsyncHandlerCallCache(handlerDescriptor).Invoke(handler, message, messageDescriptor);
}
else
{
GetOrCreateSyncHandlerCallCache(handlerDescriptor).Invoke(handler, message, messageDescriptor);
}
}
catch (TargetInvocationException e)
{
exceptions?.Add(e.InnerException);
return(false);
}
catch (Exception e)
{
exceptions?.Add(e);
return(false);
}
finally
{
if (handler != null)
{
handlerFactory.ReleaseHandler(scope, handler);
}
}
return(true);
}
public void HandleMessage(IQueueMessage message)
{
var handler = _messageHandlerFactory.GetHandler(message.MessageType);
handler.HandleMessage(message);
}
public void CanGetHandlerForRegisteredMessage()
{
Assert.IsNotNull(_factory.GetHandler(typeof(Message1)));
}
