static Func <TMessage, Guid> GetCorrelationIdSelector(IEventBinder <TSaga> binder)
{
Func <TMessage, Guid> correlationIdSelector = binder.GetCorrelationIdSelector <TMessage>();
if (correlationIdSelector != null)
{
return(correlationIdSelector);
}
var visitor = new CorrelationExpressionToSagaIdVisitor <TSaga, TMessage>();
Expression <Func <TMessage, Guid> > exp = visitor.Build(binder.GetBindExpression <TMessage>());
if (exp != null)
{
return(exp.Compile());
}
if (typeof(TMessage).Implements <ICorrelatedBy <Guid> >())
{
Type genericType = typeof(Correlated <>).MakeGenericType(typeof(TSaga), typeof(TMessage), typeof(TMessage));
var correlated = (ICorrelated <TMessage>)Activator.CreateInstance(genericType);
return(correlated.CorrelationIdSelector);
}
return(x => NewIds.NewId.NextGuid());
}
static Func <TMessage, Guid> GenerateGetSagaIdFunction(Expression <Func <TSaga, TMessage, bool> > selector)
{
var visitor = new CorrelationExpressionToSagaIdVisitor <TSaga, TMessage>();
Expression <Func <TMessage, Guid> > exp = visitor.Build(selector);
return(exp != null?exp.Compile() : (x => CombGuid.Generate()));
}
static Func <TData, Guid> GenerateCorrelationIdSelector(Expression <Func <TInstance, TData, bool> > selector)
{
var visitor = new CorrelationExpressionToSagaIdVisitor <TInstance, TData>();
Expression <Func <TData, Guid> > exp = visitor.Build(selector);
return(exp != null?exp.Compile() : (x => NewId.NextGuid()));
}
public void Using_correlated_messages_to_start_sagas()
{
_builder = new CorrelationExpressionToSagaIdVisitor<SimpleSaga, InitiateSimpleSaga>();
}
public void Using_correlated_messages_to_start_sagas()
{
_builder = new CorrelationExpressionToSagaIdVisitor <SimpleSaga, InitiateSimpleSaga>();
}