SagaFinderDefinition GetFinder(SagaMetadata metadata, string messageType)
{
if (!metadata.TryGetFinder(messageType, out var finder))
{
throw new Exception("Finder not found");
}
return(finder);
}
SagaFinderDefinition GetSagaFinder(SagaMetadata metadata, IInvokeHandlerContext context)
{
foreach (var messageType in context.MessageMetadata.MessageHierarchy)
{
if (metadata.TryGetFinder(messageType.FullName, out var finderDefinition))
{
return(finderDefinition);
}
}
return(null);
}
IContainSagaData TryLoadSagaEntity(SagaMetadata metadata, LogicalMessage message)
{
string sagaId;
if (message.Headers.TryGetValue(Headers.SagaId, out sagaId) && !string.IsNullOrEmpty(sagaId))
{
var sagaEntityType = metadata.SagaEntityType;
//since we have a saga id available we can now shortcut the finders and just load the saga
var loaderType = typeof(LoadSagaByIdWrapper <>).MakeGenericType(sagaEntityType);
var loader = (SagaLoader)Activator.CreateInstance(loaderType);
return(loader.Load(SagaPersister, sagaId));
}
SagaFinderDefinition finderDefinition = null;
foreach (var messageType in message.Metadata.MessageHierarchy)
{
if (metadata.TryGetFinder(messageType.FullName, out finderDefinition))
{
break;
}
}
//check if we could find a finder
if (finderDefinition == null)
{
return(null);
}
var finderType = finderDefinition.Type;
var finder = currentContext.Builder.Build(finderType);
return(((SagaFinder)finder).Find(currentContext.Builder, finderDefinition, message));
}