<PackageReference Include="Polly" Version="4.1.2" />

RetrySyntax

public static class RetrySyntax
Fluent API for defining a Retry Policy.
using Polly.Retry; using System; using System.Collections.Generic; using System.Linq; using System.Threading; using System.Threading.Tasks; namespace Polly { public static class RetrySyntax { public static RetryPolicy Retry(this PolicyBuilder policyBuilder) { return policyBuilder.Retry(1); } public static RetryPolicy Retry(this PolicyBuilder policyBuilder, int retryCount) { Action<Exception, int> onRetry = delegate { }; return policyBuilder.Retry(retryCount, onRetry); } public static RetryPolicy Retry(this PolicyBuilder policyBuilder, Action<Exception, int> onRetry) { return policyBuilder.Retry(1, onRetry); } public static RetryPolicy Retry(this PolicyBuilder policyBuilder, int retryCount, Action<Exception, int> onRetry) { if (retryCount < 0) throw new ArgumentOutOfRangeException("retryCount", "Value must be greater than or equal to zero."); if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy(delegate(Action action, Context context) { RetryEngine.Implementation(action, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithCount(retryCount, onRetry)); }, policyBuilder.ExceptionPredicates); } public static RetryPolicy Retry(this PolicyBuilder policyBuilder, Action<Exception, int, Context> onRetry) { return policyBuilder.Retry(1, onRetry); } public static RetryPolicy Retry(this PolicyBuilder policyBuilder, int retryCount, Action<Exception, int, Context> onRetry) { if (retryCount < 0) throw new ArgumentOutOfRangeException("retryCount", "Value must be greater than or equal to zero."); if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy(delegate(Action action, Context context) { RetryEngine.Implementation(action, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithCount(retryCount, onRetry, context)); }, policyBuilder.ExceptionPredicates); } public static RetryPolicy RetryForever(this PolicyBuilder policyBuilder) { Action<Exception> onRetry = delegate { }; return policyBuilder.RetryForever(onRetry); } public static RetryPolicy RetryForever(this PolicyBuilder policyBuilder, Action<Exception> onRetry) { if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy(delegate(Action action, Context context) { RetryEngine.Implementation(action, policyBuilder.ExceptionPredicates, () => new RetryPolicyState(onRetry)); }, policyBuilder.ExceptionPredicates); } public static RetryPolicy RetryForever(this PolicyBuilder policyBuilder, Action<Exception, Context> onRetry) { if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy(delegate(Action action, Context context) { RetryEngine.Implementation(action, policyBuilder.ExceptionPredicates, () => new RetryPolicyState(onRetry, context)); }, policyBuilder.ExceptionPredicates); } public static RetryPolicy WaitAndRetry(this PolicyBuilder policyBuilder, int retryCount, Func<int, TimeSpan> sleepDurationProvider) { Action<Exception, TimeSpan> onRetry = delegate { }; return policyBuilder.WaitAndRetry(retryCount, sleepDurationProvider, onRetry); } public static RetryPolicy WaitAndRetry(this PolicyBuilder policyBuilder, int retryCount, Func<int, TimeSpan> sleepDurationProvider, Action<Exception, TimeSpan> onRetry) { if (retryCount < 0) throw new ArgumentOutOfRangeException("retryCount", "Value must be greater than or equal to zero."); if (sleepDurationProvider == null) throw new ArgumentNullException("sleepDurationProvider"); if (onRetry == null) throw new ArgumentNullException("onRetry"); IEnumerable<TimeSpan> sleepDurations = Enumerable.Range(1, retryCount).Select(sleepDurationProvider); return new RetryPolicy(delegate(Action action, Context context) { RetryEngine.Implementation(action, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithSleep(sleepDurations, onRetry)); }, policyBuilder.ExceptionPredicates); } public static RetryPolicy WaitAndRetry(this PolicyBuilder policyBuilder, int retryCount, Func<int, TimeSpan> sleepDurationProvider, Action<Exception, TimeSpan, Context> onRetry) { if (retryCount < 0) throw new ArgumentOutOfRangeException("retryCount", "Value must be greater than or equal to zero."); if (sleepDurationProvider == null) throw new ArgumentNullException("sleepDurationProvider"); if (onRetry == null) throw new ArgumentNullException("onRetry"); IEnumerable<TimeSpan> sleepDurations = Enumerable.Range(1, retryCount).Select(sleepDurationProvider); return new RetryPolicy(delegate(Action action, Context context) { RetryEngine.Implementation(action, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithSleep(sleepDurations, onRetry, context)); }, policyBuilder.ExceptionPredicates); } public static RetryPolicy WaitAndRetry(this PolicyBuilder policyBuilder, IEnumerable<TimeSpan> sleepDurations) { Action<Exception, TimeSpan> onRetry = delegate { }; return policyBuilder.WaitAndRetry(sleepDurations, onRetry); } public static RetryPolicy WaitAndRetry(this PolicyBuilder policyBuilder, IEnumerable<TimeSpan> sleepDurations, Action<Exception, TimeSpan> onRetry) { if (sleepDurations == null) throw new ArgumentNullException("sleepDurations"); if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy(delegate(Action action, Context context) { RetryEngine.Implementation(action, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithSleep(sleepDurations, onRetry)); }, policyBuilder.ExceptionPredicates); } public static RetryPolicy WaitAndRetry(this PolicyBuilder policyBuilder, IEnumerable<TimeSpan> sleepDurations, Action<Exception, TimeSpan, Context> onRetry) { if (sleepDurations == null) throw new ArgumentNullException("sleepDurations"); if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy(delegate(Action action, Context context) { RetryEngine.Implementation(action, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithSleep(sleepDurations, onRetry, context)); }, policyBuilder.ExceptionPredicates); } public static RetryPolicy WaitAndRetryForever(this PolicyBuilder policyBuilder, Func<int, TimeSpan> sleepDurationProvider) { if (sleepDurationProvider == null) throw new ArgumentNullException("sleepDurationProvider"); Action<Exception, TimeSpan> onRetry = delegate { }; return policyBuilder.WaitAndRetryForever(sleepDurationProvider, onRetry); } public static RetryPolicy WaitAndRetryForever(this PolicyBuilder policyBuilder, Func<int, TimeSpan> sleepDurationProvider, Action<Exception, TimeSpan> onRetry) { if (sleepDurationProvider == null) throw new ArgumentNullException("sleepDurationProvider"); if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy(delegate(Action action, Context context) { RetryEngine.Implementation(action, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithSleepDurationProvider(sleepDurationProvider, onRetry)); }, policyBuilder.ExceptionPredicates); } public static RetryPolicy WaitAndRetryForever(this PolicyBuilder policyBuilder, Func<int, TimeSpan> sleepDurationProvider, Action<Exception, TimeSpan, Context> onRetry) { if (sleepDurationProvider == null) throw new ArgumentNullException("sleepDurationProvider"); if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy(delegate(Action action, Context context) { RetryEngine.Implementation(action, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithSleepDurationProvider(sleepDurationProvider, onRetry, context)); }, policyBuilder.ExceptionPredicates); } public static RetryPolicy RetryAsync(this PolicyBuilder policyBuilder) { return policyBuilder.RetryAsync(1); } public static RetryPolicy RetryAsync(this PolicyBuilder policyBuilder, int retryCount) { Action<Exception, int> onRetry = delegate { }; return policyBuilder.RetryAsync(retryCount, onRetry); } public static RetryPolicy RetryAsync(this PolicyBuilder policyBuilder, Action<Exception, int> onRetry) { return policyBuilder.RetryAsync(1, onRetry); } public static RetryPolicy RetryAsync(this PolicyBuilder policyBuilder, int retryCount, Action<Exception, int> onRetry) { if (retryCount < 0) throw new ArgumentOutOfRangeException("retryCount", "Value must be greater than or equal to zero."); if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy((Func<CancellationToken, Task> action, Context context, CancellationToken cancellationToken, bool continueOnCapturedContext) => RetryEngine.ImplementationAsync(action, cancellationToken, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithCount(retryCount, onRetry), continueOnCapturedContext), policyBuilder.ExceptionPredicates); } public static RetryPolicy RetryAsync(this PolicyBuilder policyBuilder, Action<Exception, int, Context> onRetry) { return policyBuilder.RetryAsync(1, onRetry); } public static RetryPolicy RetryAsync(this PolicyBuilder policyBuilder, int retryCount, Action<Exception, int, Context> onRetry) { if (retryCount < 0) throw new ArgumentOutOfRangeException("retryCount", "Value must be greater than or equal to zero."); if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy((Func<CancellationToken, Task> action, Context context, CancellationToken cancellationToken, bool continueOnCapturedContext) => RetryEngine.ImplementationAsync(action, cancellationToken, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithCount(retryCount, onRetry, context), continueOnCapturedContext), policyBuilder.ExceptionPredicates); } public static RetryPolicy RetryForeverAsync(this PolicyBuilder policyBuilder) { Action<Exception> onRetry = delegate { }; return policyBuilder.RetryForeverAsync(onRetry); } public static RetryPolicy RetryForeverAsync(this PolicyBuilder policyBuilder, Action<Exception> onRetry) { if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy((Func<CancellationToken, Task> action, Context context, CancellationToken cancellationToken, bool continueOnCapturedContext) => RetryEngine.ImplementationAsync(action, cancellationToken, policyBuilder.ExceptionPredicates, () => new RetryPolicyState(onRetry), continueOnCapturedContext), policyBuilder.ExceptionPredicates); } public static RetryPolicy RetryForeverAsync(this PolicyBuilder policyBuilder, Action<Exception, Context> onRetry) { if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy((Func<CancellationToken, Task> action, Context context, CancellationToken cancellationToken, bool continueOnCapturedContext) => RetryEngine.ImplementationAsync(action, cancellationToken, policyBuilder.ExceptionPredicates, () => new RetryPolicyState(onRetry, context), continueOnCapturedContext), policyBuilder.ExceptionPredicates); } public static RetryPolicy WaitAndRetryAsync(this PolicyBuilder policyBuilder, int retryCount, Func<int, TimeSpan> sleepDurationProvider) { Action<Exception, TimeSpan> onRetry = delegate { }; return policyBuilder.WaitAndRetryAsync(retryCount, sleepDurationProvider, onRetry); } public static RetryPolicy WaitAndRetryAsync(this PolicyBuilder policyBuilder, int retryCount, Func<int, TimeSpan> sleepDurationProvider, Action<Exception, TimeSpan> onRetry) { if (retryCount < 0) throw new ArgumentOutOfRangeException("retryCount", "Value must be greater than or equal to zero."); if (sleepDurationProvider == null) throw new ArgumentNullException("sleepDurationProvider"); if (onRetry == null) throw new ArgumentNullException("onRetry"); IEnumerable<TimeSpan> sleepDurations = Enumerable.Range(1, retryCount).Select(sleepDurationProvider); return new RetryPolicy((Func<CancellationToken, Task> action, Context context, CancellationToken cancellationToken, bool continueOnCapturedContext) => RetryEngine.ImplementationAsync(action, cancellationToken, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithSleep(sleepDurations, onRetry), continueOnCapturedContext), policyBuilder.ExceptionPredicates); } public static RetryPolicy WaitAndRetryAsync(this PolicyBuilder policyBuilder, int retryCount, Func<int, TimeSpan> sleepDurationProvider, Action<Exception, TimeSpan, Context> onRetry) { if (retryCount < 0) throw new ArgumentOutOfRangeException("retryCount", "Value must be greater than or equal to zero."); if (sleepDurationProvider == null) throw new ArgumentNullException("sleepDurationProvider"); if (onRetry == null) throw new ArgumentNullException("onRetry"); IEnumerable<TimeSpan> sleepDurations = Enumerable.Range(1, retryCount).Select(sleepDurationProvider); return new RetryPolicy((Func<CancellationToken, Task> action, Context context, CancellationToken cancellationToken, bool continueOnCapturedContext) => RetryEngine.ImplementationAsync(action, cancellationToken, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithSleep(sleepDurations, onRetry, context), continueOnCapturedContext), policyBuilder.ExceptionPredicates); } public static RetryPolicy WaitAndRetryAsync(this PolicyBuilder policyBuilder, IEnumerable<TimeSpan> sleepDurations) { Action<Exception, TimeSpan> onRetry = delegate { }; return policyBuilder.WaitAndRetryAsync(sleepDurations, onRetry); } public static RetryPolicy WaitAndRetryAsync(this PolicyBuilder policyBuilder, IEnumerable<TimeSpan> sleepDurations, Action<Exception, TimeSpan> onRetry) { if (sleepDurations == null) throw new ArgumentNullException("sleepDurations"); if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy((Func<CancellationToken, Task> action, Context context, CancellationToken cancellationToken, bool continueOnCapturedContext) => RetryEngine.ImplementationAsync(action, cancellationToken, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithSleep(sleepDurations, onRetry), continueOnCapturedContext), policyBuilder.ExceptionPredicates); } public static RetryPolicy WaitAndRetryAsync(this PolicyBuilder policyBuilder, IEnumerable<TimeSpan> sleepDurations, Action<Exception, TimeSpan, Context> onRetry) { if (sleepDurations == null) throw new ArgumentNullException("sleepDurations"); if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy((Func<CancellationToken, Task> action, Context context, CancellationToken cancellationToken, bool continueOnCapturedContext) => RetryEngine.ImplementationAsync(action, cancellationToken, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithSleep(sleepDurations, onRetry, context), continueOnCapturedContext), policyBuilder.ExceptionPredicates); } public static RetryPolicy WaitAndRetryForeverAsync(this PolicyBuilder policyBuilder, Func<int, TimeSpan> sleepDurationProvider) { if (sleepDurationProvider == null) throw new ArgumentNullException("sleepDurationProvider"); Action<Exception, TimeSpan> onRetry = delegate { }; return policyBuilder.WaitAndRetryForeverAsync(sleepDurationProvider, onRetry); } public static RetryPolicy WaitAndRetryForeverAsync(this PolicyBuilder policyBuilder, Func<int, TimeSpan> sleepDurationProvider, Action<Exception, TimeSpan> onRetry) { if (sleepDurationProvider == null) throw new ArgumentNullException("sleepDurationProvider"); if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy((Func<CancellationToken, Task> action, Context context, CancellationToken cancellationToken, bool continueOnCapturedContext) => RetryEngine.ImplementationAsync(action, cancellationToken, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithSleepDurationProvider(sleepDurationProvider, onRetry), continueOnCapturedContext), policyBuilder.ExceptionPredicates); } public static RetryPolicy WaitAndRetryForeverAsync(this PolicyBuilder policyBuilder, Func<int, TimeSpan> sleepDurationProvider, Action<Exception, TimeSpan, Context> onRetry) { if (sleepDurationProvider == null) throw new ArgumentNullException("sleepDurationProvider"); if (onRetry == null) throw new ArgumentNullException("onRetry"); return new RetryPolicy((Func<CancellationToken, Task> action, Context context, CancellationToken cancellationToken, bool continueOnCapturedContext) => RetryEngine.ImplementationAsync(action, cancellationToken, policyBuilder.ExceptionPredicates, () => new RetryPolicyStateWithSleepDurationProvider(sleepDurationProvider, onRetry, context), continueOnCapturedContext), policyBuilder.ExceptionPredicates); } } }