CircuitBreakerEngine
class CircuitBreakerEngine
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.ExceptionServices;
using System.Threading;
using System.Threading.Tasks;
namespace Polly.CircuitBreaker
{
internal class CircuitBreakerEngine
{
internal static TResult Implementation<TResult>(Func<Context, CancellationToken, TResult> action, Context context, CancellationToken cancellationToken, IEnumerable<ExceptionPredicate> shouldHandleExceptionPredicates, IEnumerable<ResultPredicate<TResult>> shouldHandleResultPredicates, ICircuitController<TResult> breakerController)
{
cancellationToken.ThrowIfCancellationRequested();
breakerController.OnActionPreExecute();
try {
TResult result = (TResult)action(context, cancellationToken);
if (shouldHandleResultPredicates.Any((ResultPredicate<TResult> predicate) => predicate((TResult)result)))
breakerController.OnActionFailure(new DelegateResult<TResult>((TResult)result), context);
else
breakerController.OnActionSuccess(context);
return (TResult)result;
} catch (Exception ex2) {
Exception ex;
Exception ex3 = ex = ex2;
Exception ex4 = (from predicate in shouldHandleExceptionPredicates
select predicate(ex)).FirstOrDefault((Exception e) => e != null);
if (ex4 == null)
throw;
breakerController.OnActionFailure(new DelegateResult<TResult>(ex4), context);
if (ex4 != ex)
ExceptionDispatchInfo.Capture(ex4).Throw();
throw;
}
}
internal static async Task<TResult> ImplementationAsync<TResult>(Func<Context, CancellationToken, Task<TResult>> action, Context context, IEnumerable<ExceptionPredicate> shouldHandleExceptionPredicates, IEnumerable<ResultPredicate<TResult>> shouldHandleResultPredicates, ICircuitController<TResult> breakerController, CancellationToken cancellationToken, bool continueOnCapturedContext)
{
cancellationToken.ThrowIfCancellationRequested();
breakerController.OnActionPreExecute();
try {
TResult result = (TResult)(await action(context, cancellationToken).ConfigureAwait(continueOnCapturedContext));
if (Enumerable.Any<ResultPredicate<TResult>>(shouldHandleResultPredicates, (Func<ResultPredicate<TResult>, bool>)((ResultPredicate<TResult> predicate) => predicate((TResult)result))))
breakerController.OnActionFailure(new DelegateResult<TResult>((TResult)result), context);
else
breakerController.OnActionSuccess(context);
return (TResult)result;
} catch (Exception ex2) {
Exception ex = ex2;
Exception ex3 = Enumerable.FirstOrDefault<Exception>(Enumerable.Select<ExceptionPredicate, Exception>(shouldHandleExceptionPredicates, (Func<ExceptionPredicate, Exception>)((ExceptionPredicate predicate) => predicate(ex))), (Func<Exception, bool>)((Exception e) => e != null));
if (ex3 == null)
throw;
breakerController.OnActionFailure(new DelegateResult<TResult>(ex3), context);
if (ex3 != ex)
ExceptionDispatchInfo.Capture(ex3).Throw();
throw;
}
}
}
}