public IPipeElement <TContext, TReturn, TReturnOfNextStep> DoNext <TReturnOfNextStep, TStepProvider>()
{
return(Element <TContext, TReturn, TReturnOfNextStep> .Create(
Context,
PreviousElements.Append(this),
Context.ServiceProvider.GetRequiredService <TStepProvider>()));
}
public async Task <TReturn> CompletePipeAsync()
{
var firstElement = (IStartElement)PreviousElements.First();
var input = firstElement.Input;
var context = firstElement.Context;
var cache = default(IMemoryCache);
foreach (var element in PreviousElements)
{
try
{
var output = element.GenericSyncProvider != null
? element.GenericSyncProvider.InternalDo(context, input)
: element.GenericAsyncProvider != null
? await element.GenericAsyncProvider.InternalDoAsync(context, input).ConfigureAwait(false)
: throw new InvalidOperationException("No provider set for step.");
if (context.EnableCache && context.CacheFromThisStep && context.CacheKey != null)
{
context.CacheFromThisStep = false;
cache ??= context.ServiceProvider.GetRequiredService <IMemoryCache>();
if (cache.TryGetValue <TReturn>(context.CacheKey, out var cachedReturn))
{
return(cachedReturn);
}
}
input = output;
}
catch (Exception ex)
{
Context.ThrownException = ex;
return(SyncProvider != null
? SyncProvider.Do(Context, default)
: AsyncProvider != null
? await AsyncProvider.DoAsync(Context, default).ConfigureAwait(false)
: throw new InvalidOperationException("No provider set for final step."));
}
}
var result = SyncProvider != null
? SyncProvider.Do(Context, (TInput)input)
: AsyncProvider != null
? await AsyncProvider.DoAsync(Context, (TInput)input).ConfigureAwait(false)
: throw new InvalidOperationException("No provider set for final step.");
if (context.EnableCache && context.CacheKey != null && cache != null)
{
cache.Set(context.CacheKey, result, context.CacheLifeTime ?? new TimeSpan(0, 5, 0));
}
return(result);
}
public async Task <TReturnOfNextStep> CompleteWith <TReturnOfNextStep, TFinalStepProvider>()
where TFinalStepProvider : ISyncStepProvider <TContext, TReturn?, TReturnOfNextStep>
{
var finalStep = FinalElement <TContext, TReturn, TReturnOfNextStep> .Create(
Context,
PreviousElements.Append(this),
Context.ServiceProvider.GetRequiredService <TFinalStepProvider>());
return(await finalStep.CompletePipeAsync());
}
