FallbackEngine
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
namespace Polly.Fallback
{
internal static class FallbackEngine
{
internal static TResult Implementation<TResult>(Func<CancellationToken, TResult> action, Context context, CancellationToken cancellationToken, IEnumerable<ExceptionPredicate> shouldHandleExceptionPredicates, IEnumerable<ResultPredicate<TResult>> shouldHandleResultPredicates, Action<DelegateResult<TResult>, Context> onFallback, Func<CancellationToken, TResult> fallbackAction)
{
DelegateResult<TResult> arg;
try {
cancellationToken.ThrowIfCancellationRequested();
TResult result = (TResult)action(cancellationToken);
if (!shouldHandleResultPredicates.Any((ResultPredicate<TResult> predicate) => predicate((TResult)result)))
return (TResult)result;
arg = new DelegateResult<TResult>((TResult)result);
} catch (Exception ex2) {
Exception ex;
Exception ex3 = ex = ex2;
if (!shouldHandleExceptionPredicates.Any((ExceptionPredicate predicate) => predicate(ex)))
throw;
arg = new DelegateResult<TResult>(ex);
}
onFallback(arg, context);
return fallbackAction(cancellationToken);
}
internal static async Task<TResult> ImplementationAsync<TResult>(Func<CancellationToken, Task<TResult>> action, Context context, IEnumerable<ExceptionPredicate> shouldHandleExceptionPredicates, IEnumerable<ResultPredicate<TResult>> shouldHandleResultPredicates, Func<DelegateResult<TResult>, Context, Task> onFallbackAsync, Func<CancellationToken, Task<TResult>> fallbackAction, CancellationToken cancellationToken, bool continueOnCapturedContext)
{
DelegateResult<TResult> arg;
try {
cancellationToken.ThrowIfCancellationRequested();
<>c__DisplayClass1_0<TResult> <>c__DisplayClass1_;
TResult result2 = <>c__DisplayClass1_.result;
TResult result;
TResult val = (TResult)(result = (TResult)(await action(cancellationToken).ConfigureAwait(continueOnCapturedContext)));
if (!Enumerable.Any<ResultPredicate<TResult>>(shouldHandleResultPredicates, (Func<ResultPredicate<TResult>, bool>)((ResultPredicate<TResult> predicate) => predicate((TResult)result))))
return (TResult)result;
arg = new DelegateResult<TResult>((TResult)result);
} catch (Exception ex2) {
Exception ex = ex2;
if (!Enumerable.Any<ExceptionPredicate>(shouldHandleExceptionPredicates, (Func<ExceptionPredicate, bool>)((ExceptionPredicate predicate) => predicate(ex))))
throw;
arg = new DelegateResult<TResult>(ex);
}
await onFallbackAsync(arg, context).ConfigureAwait(continueOnCapturedContext);
return await fallbackAction(cancellationToken).ConfigureAwait(continueOnCapturedContext);
}
}
}