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TransientFaultHandling.Configuration 3.0.0

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

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• The outdated configuration & APIs are replaced by modern .NET JSON/XML/INI configuration.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:

ITransientErrorDetectionStrategy transientExceptionDetection = new MyDetection();
RetryStrategy retryStrategy = new FixedInterval(retryCount: 5, retryInterval: TimeSpan.FromSeconds(1));
RetryPolicy retryPolicy = new RetryPolicy(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 => exception is WebException,
 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.Response is HttpWebResponse { 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 from https://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.Core
dotnet add package TransientFaultHandling.Caching
dotnet add package TransientFaultHandling.Configuration
dotnet add package TransientFaultHandling.Data

Or in Visual Studio NuGet Package Manager Console:

Install-Package EnterpriseLibrary.TransientFaultHandling.Core
Install-Package TransientFaultHandling.Caching
Install-Package TransientFaultHandling.Configuration
Install-Package TransientFaultHandling.Data