/// <summary>
/// Processes the specified message asynchronously.
/// </summary>
/// <param name="message">The message.</param>
/// <param name="context">Context for the message processing.</param>
/// <param name="token"> The cancellation token.</param>
/// <returns>
/// The response promise.
/// </returns>
public Task<IMessage> ProcessAsync(IMessage message, IMessageProcessingContext context, CancellationToken token)
{
Contract.Requires(message != null);
Contract.Ensures(Contract.Result<Task<IMessage>>() != null);
return Contract.Result<Task<IMessage>>();
}
/// <summary>
/// Interception called before invoking the handler to process the message.
/// </summary>
/// <param name="context">The processing context.</param>
/// <param name="token">The cancellation token.</param>
/// <returns>
/// A task.
/// </returns>
public Task BeforeProcessAsync(IMessageProcessingContext context, CancellationToken token)
{
Contract.Requires(context != null);
Contract.Ensures(Contract.Result<Task>() != null);
return Contract.Result<Task>();
}
public Task Handle(object message, IMessageProcessingContext context)
{
ConsoleColor foregroundColor = Console.ForegroundColor;
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("The correlated saga could not be found. Have you configured the RavenDB.Bundle.UniqueConstrains on your RavenDB server?");
Console.ForegroundColor = foregroundColor;
return Task.FromResult(0);
}
/// <summary>
/// Processes the specified message asynchronously.
/// </summary>
/// <param name="message">The message.</param>
/// <param name="context">Context for the message processing.</param>
/// <param name="token"> The cancellation token.</param>
/// <returns>
/// The response promise.
/// </returns>
public async Task<IMessage> ProcessAsync(IMessage message, IMessageProcessingContext context = null, CancellationToken token = default(CancellationToken))
{
using (var messageHandler = this.CreateMessageHandler(message))
{
if (context == null)
{
context = this.CreateProcessingContext(message, messageHandler);
}
else
{
context.Message = message;
context.Handler = messageHandler;
}
var filters = this.GetOrderedFilters(context);
try
{
foreach (var filter in filters)
{
await filter.BeforeProcessAsync(context, token);
}
var response = await messageHandler.ProcessAsync(message, context, token);
context.Response = response;
}
catch (Exception ex)
{
context.Exception = ex;
}
foreach (var filter in filters.Reverse())
{
await filter.AfterProcessAsync(context, token);
}
if (context.Exception != null)
{
throw context.Exception;
}
return context.Response;
}
}
public Task Handle(object message, IMessageProcessingContext context)
{
var sagaDisappearedMessage = new SagaDisappearedMessage();
return context.Reply(sagaDisappearedMessage);
}
public Task Handle(object message, IMessageProcessingContext context)
{
Handled = true;
return(TaskEx.CompletedTask);
}
public Task Handle(object message, IMessageProcessingContext context)
{
return(null);
}
public Task Handle(object message, IMessageProcessingContext context)
{
return(context.ForwardCurrentMessageTo("Samples.SagaMigration.Server.New"));
}
public Task Handle(object message, IMessageProcessingContext context)
{
Context.SagaNotFound = true;
return(Task.FromResult(0));
}
public Task Handle(object message, IMessageProcessingContext context)
{
TestContext.TimesFired++;
return(Task.FromResult(0));
}
public Task HandleMessage(object message, IMessageProcessingContext context)
{
Calls.Add(DateTime.Now);
throw new ApplicationException("This is an exception that should cause the message to be dead-lettered eventually.");
}
public Task Handle(object message, IMessageProcessingContext context)
{
log.Error("The correlated saga could not be found. Is RavenDB.Bundle.UniqueConstrains configured on the RavenDB server?");
return(Task.FromResult(0));
}
public Task Handle(object message, IMessageProcessingContext context)
{
testContext.NotFoundHandlerCalled = true;
return(Task.FromResult(0));
}
public Task Handle(object message, IMessageProcessingContext context)
{
log.Error("The correlated saga could not be found. Have you configured the RavenDB.Bundle.UniqueConstrains on your RavenDB server?");
return Task.FromResult(0);
}
public Task Handle(object message, IMessageProcessingContext context)
{
var sagaDisappearedMessage = new SagaDisappearedMessage();
return(context.Reply(sagaDisappearedMessage));
}
public Task Handle(object message, IMessageProcessingContext context)
{
return null;
}
/// <summary>
/// Gets the ordered filters to be applied.
/// </summary>
/// <param name="context">The context.</param>
/// <returns>An ordered list of filters which can be applied to the provided context.</returns>
protected virtual IList<IMessageProcessingFilter> GetOrderedFilters(IMessageProcessingContext context)
{
Contract.Ensures(Contract.Result<IList<IMessageProcessingFilter>>() != null);
var requestTypeInfo = context.Message.GetType().GetTypeInfo();
var behaviors = (from b in this.filterFactories
where b.Metadata.MessageType.GetTypeInfo().IsAssignableFrom(requestTypeInfo)
orderby b.Metadata.ProcessingPriority
select b.CreateExport().Value).ToList();
// TODO optimize to cache the ordered filters/message type.
return behaviors;
}
public Task Handle(object message, IMessageProcessingContext context)
{
Handled = true;
return TaskEx.CompletedTask;
}
public async Task Handle(object message, IMessageProcessingContext context)
{
await context.Reply(new SagaDisappearedMessage());
}
public static string SafeGetMessageHeader(this IMessageProcessingContext context, string headerName)
{
return(context.MessageHeaders.ContainsKey(headerName) ?
context.MessageHeaders[headerName] :
null);
}
