RetryPolicy<TResult>
A retry policy that can be applied to synchronous delegates returning a value of type TResult.
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading;
namespace Polly.Retry
{
public class RetryPolicy<TResult> : Policy<TResult>, IRetryPolicy<TResult>, IRetryPolicy, IsPolicy
{
private readonly Action<DelegateResult<TResult>, TimeSpan, int, Context> _onRetry;
private readonly int _permittedRetryCount;
private readonly IEnumerable<TimeSpan> _sleepDurationsEnumerable;
private readonly Func<int, DelegateResult<TResult>, Context, TimeSpan> _sleepDurationProvider;
internal RetryPolicy(PolicyBuilder<TResult> policyBuilder, Action<DelegateResult<TResult>, TimeSpan, int, Context> onRetry, int permittedRetryCount = int.MaxValue, IEnumerable<TimeSpan> sleepDurationsEnumerable = null, Func<int, DelegateResult<TResult>, Context, TimeSpan> sleepDurationProvider = null)
: base(policyBuilder)
{
_permittedRetryCount = permittedRetryCount;
_sleepDurationsEnumerable = sleepDurationsEnumerable;
_sleepDurationProvider = sleepDurationProvider;
if (onRetry == null)
throw new ArgumentNullException("onRetry");
_onRetry = onRetry;
}
[DebuggerStepThrough]
protected override TResult Implementation(Func<Context, CancellationToken, TResult> action, Context context, CancellationToken cancellationToken)
{
return RetryEngine.Implementation<TResult>(action, context, cancellationToken, base.ExceptionPredicates, base.ResultPredicates, _onRetry, _permittedRetryCount, _sleepDurationsEnumerable, _sleepDurationProvider);
}
}
}