static bool IsMessageAllowedToStartTheSaga(IInvokeHandlerContext context, SagaMetadata sagaMetadata)
{
if (context.Headers.ContainsKey(Headers.SagaId) &&
context.Headers.TryGetValue(Headers.SagaType, out var sagaType))
{
//we want to move away from the assembly fully qualified name since that will break if you move sagas
//between assemblies. We use the FullName instead, which is enough to identify the saga.
if (sagaType.StartsWith(sagaMetadata.Name))
{
//so now we have a saga id for this saga, and if we can't find it, we shouldn't start a new one
return(false);
}
}
return(context.MessageMetadata.MessageHierarchy.Any(messageType => sagaMetadata.IsMessageAllowedToStartTheSaga(messageType.FullName)));
}
static bool IsMessageAllowedToStartTheSaga(LogicalMessage message, SagaMetadata sagaMetadata)
{
string sagaType;
if (message.Headers.ContainsKey(Headers.SagaId) &&
message.Headers.TryGetValue(Headers.SagaType, out sagaType))
{
//we want to move away from the assembly fully qualified name since that will break if you move sagas
// between assemblies. We use the fullname instead which is enough to identify the saga
if (sagaType.StartsWith(sagaMetadata.Name))
{
//so now we have a saga id for this saga and if we can't find it we shouldn't start a new one
return(false);
}
}
return(message.Metadata.MessageHierarchy.Any(messageType => sagaMetadata.IsMessageAllowedToStartTheSaga(messageType.FullName)));
}