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Enterprise Library - Transient Fault Handling Application Block for modern .NET with improvement.

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Dixin/EnterpriseLibrary.TransientFaultHandling.Core

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Transient Fault Handling Application Block/Retry patterns for modern .NET.

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TransientFaultHandling.Core is retry library for transient error handling. It is ported from Microsoft Enterprise Library’s Transient Fault Handling Application Block, a library widely used with .NET Framework.

  • The retry pattern APIs are ported to .NET 6 & .NET 5 & .NET Core & .NET Standard.
  • New functional and fluent APIs to easily implement retry logic.
  • The outdated configuration & APIs are replaced by modern .NET JSON/XML/INI configuration.

Introduction

With this library, the old code with retry logic based on Microsoft Enterprise Library can be ported to .NET 6 & .NET 5 & .NET Core & .NET Standard without modification:

ITransientErrorDetectionStrategytransientExceptionDetection=newMyDetection();RetryStrategyretryStrategy=newFixedInterval(retryCount:5,retryInterval:TimeSpan.FromSeconds(1));RetryPolicyretryPolicy=newRetryPolicy(transientExceptionDetection,retryStrategy);retryPolicy.ExecuteAction(()=>webClient.DownloadString("https://DixinYan.com"));

With this library, it is extremely easy to detect transient exception and implement retry logic. For example, the following code downloads a string, if the exception thrown is transient (a WebException), it retries up to 5 times, with it waits for 1 second between each retry:

Retry.FixedInterval(()=>webClient.DownloadString("https://DixinYan.com"),isTransient: exception=>exceptionisWebException,retryCount:5,retryInterval:TimeSpan.FromSeconds(1));

Fluent APIs are also provided for even better readability:

Retry.WithIncremental(retryCount:5,initialInterval:TimeSpan.FromSeconds(1),increment:TimeSpan.FromSeconds(1)).Catch<OperationCanceledException>().Catch<WebException>(exception=>exception.ResponseisHttpWebResponse{StatusCode:HttpStatusCode.RequestTimeout}).ExecuteAction(()=>webClient.DownloadString("https://DixinYan.com"));

It also supports JSON/XML/INI configuration:

{"retryStrategy":{"name1":{"fastFirstRetry":"true","retryCount":5,"retryInterval":"00:00:00.1"},"name2":{"fastFirstRetry":"true","retryCount":55,"initialInterval":"00:00:00.2","increment":"00:00:00.3"}}}

Document

https://weblogs.asp.net/dixin/transientfaulthandling-core-retry-library-for-net-core-net-standard

Source

https://github.com/Dixin/EnterpriseLibrary.TransientFaultHandling.Core (Partially ported fromhttps://github.com/MicrosoftArchive/transient-fault-handling-application-block, with additional new APIs and redesigned/reimplemented APIs)

NuGet installation

It can be installed through NuGet using .NET CLI:

dotnet add package EnterpriseLibrary.TransientFaultHandling.Coredotnet add package TransientFaultHandling.Cachingdotnet add package TransientFaultHandling.Configurationdotnet add package TransientFaultHandling.Data

Or in Visual Studio NuGet Package Manager Console:

Install-Package EnterpriseLibrary.TransientFaultHandling.CoreInstall-Package TransientFaultHandling.CachingInstall-Package TransientFaultHandling.ConfigurationInstall-Package TransientFaultHandling.Data
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