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35 changes: 35 additions & 0 deletions
35
src/Pandatech.CleanArchitecture.Infrastructure/Extensions/ResilienceExtensions.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| using Microsoft.AspNetCore.Builder; | ||
| using Microsoft.Extensions.DependencyInjection; | ||
| using Microsoft.Extensions.Http.Resilience; | ||
| using Pandatech.CleanArchitecture.Infrastructure.Helpers; | ||
| using Polly; | ||
|
|
||
| namespace Pandatech.CleanArchitecture.Infrastructure.Extensions; | ||
|
|
||
| public static class ResilienceExtensions | ||
| { | ||
| public static WebApplicationBuilder AddResilienceDefaultPipeline(this WebApplicationBuilder builder) | ||
| { | ||
| builder.Services.AddResiliencePipeline(ResilienceDefaultPipelineProvider.DefaultPipelineName, | ||
| pipelineBuilder => | ||
| { | ||
| pipelineBuilder.AddRetry(ResilienceDefaultPipelineProvider.DefaultNetworkRetryOptions) | ||
| .AddRetry(ResilienceDefaultPipelineProvider.TooManyRequestsRetryOptions) | ||
| .AddCircuitBreaker(ResilienceDefaultPipelineProvider.DefaultCircuitBreakerOptions) | ||
| .AddTimeout(TimeSpan.FromSeconds(8)); | ||
| }); | ||
| return builder; | ||
| } | ||
|
|
||
| public static IHttpResiliencePipelineBuilder AddResilienceDefaultPipeline(this IHttpClientBuilder builder) | ||
| { | ||
| return builder.AddResilienceHandler("DefaultPipeline", | ||
| resilienceBuilder => | ||
| { | ||
| resilienceBuilder.AddRetry(ResilienceHttpOptions.DefaultTooManyRequestsRetryOptions) | ||
| .AddRetry(ResilienceHttpOptions.DefaultNetworkRetryOptions) | ||
| .AddCircuitBreaker(ResilienceHttpOptions.DefaultCircuitBreakerOptions) | ||
| .AddTimeout(TimeSpan.FromSeconds(8)); | ||
| }); | ||
| } | ||
| } |
51 changes: 51 additions & 0 deletions
51
src/Pandatech.CleanArchitecture.Infrastructure/Helpers/ResilienceDefaultPipelineProvider.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| using System.Net; | ||
| using Polly; | ||
| using Polly.CircuitBreaker; | ||
| using Polly.Registry; | ||
| using Polly.Retry; | ||
|
|
||
| namespace Pandatech.CleanArchitecture.Infrastructure.Helpers; | ||
|
|
||
| public static class ResilienceDefaultPipelineProvider | ||
| { | ||
| public static ResiliencePipeline GetDefaultPipeline( | ||
| this ResiliencePipelineProvider<string> resiliencePipelineProvider) | ||
| { | ||
| return resiliencePipelineProvider.GetPipeline(DefaultPipelineName); | ||
| } | ||
|
|
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| internal const string DefaultPipelineName = "DefaultPipeline"; | ||
|
|
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| internal static RetryStrategyOptions TooManyRequestsRetryOptions => | ||
| new() | ||
| { | ||
| MaxRetryAttempts = 5, | ||
| BackoffType = DelayBackoffType.Exponential, | ||
| UseJitter = true, | ||
| Delay = TimeSpan.FromMilliseconds(3000), | ||
| ShouldHandle = new PredicateBuilder() | ||
| .Handle<HttpRequestException>(exception => exception.StatusCode == HttpStatusCode.TooManyRequests) | ||
| }; | ||
|
|
||
| internal static RetryStrategyOptions DefaultNetworkRetryOptions => | ||
| new() | ||
| { | ||
| MaxRetryAttempts = 7, | ||
| BackoffType = DelayBackoffType.Exponential, | ||
| UseJitter = true, | ||
| Delay = TimeSpan.FromMilliseconds(800), | ||
| ShouldHandle = new PredicateBuilder() | ||
| .Handle<HttpRequestException>(exception => exception.StatusCode == HttpStatusCode.RequestTimeout || | ||
| (int)exception.StatusCode! >= 500) | ||
| }; | ||
|
|
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| internal static CircuitBreakerStrategyOptions DefaultCircuitBreakerOptions => | ||
| new() | ||
| { | ||
| FailureRatio = 0.5, | ||
| SamplingDuration = TimeSpan.FromSeconds(30), | ||
| MinimumThroughput = 200, | ||
| BreakDuration = TimeSpan.FromSeconds(45), | ||
| ShouldHandle = new PredicateBuilder().Handle<Exception>() | ||
| }; | ||
| } |
103 changes: 103 additions & 0 deletions
103
src/Pandatech.CleanArchitecture.Infrastructure/Helpers/ResilienceHttpOptions.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| using System.Net; | ||
| using Microsoft.Extensions.Http.Resilience; | ||
| using Polly; | ||
|
|
||
| namespace Pandatech.CleanArchitecture.Infrastructure.Helpers; | ||
|
|
||
| internal static class ResilienceHttpOptions | ||
| { | ||
| public static HttpRetryStrategyOptions DefaultTooManyRequestsRetryOptions => | ||
| new() | ||
| { | ||
| MaxRetryAttempts = 5, | ||
| BackoffType = DelayBackoffType.Exponential, | ||
| UseJitter = true, | ||
| Delay = TimeSpan.FromMilliseconds(3000), | ||
| ShouldHandle = args => | ||
| { | ||
| if (args.Outcome.Exception is HttpRequestException httpException) | ||
| { | ||
| return ValueTask.FromResult((int)httpException.StatusCode! == 429); | ||
| } | ||
| if (args.Outcome.Result is not null && args.Outcome.Result.StatusCode == HttpStatusCode.TooManyRequests) | ||
| { | ||
| return ValueTask.FromResult(true); | ||
| } | ||
| return ValueTask.FromResult(false); | ||
| }, | ||
| DelayGenerator = args => | ||
| { | ||
| if (args.Outcome.Result is null) | ||
| { | ||
| return ValueTask.FromResult<TimeSpan?>(null); | ||
| } | ||
| if (!args.Outcome.Result.Headers.TryGetValues("Retry-After", out var values)) | ||
| { | ||
| return ValueTask.FromResult<TimeSpan?>(null); | ||
| } | ||
| var retryAfterValue = values.FirstOrDefault(); | ||
| if (int.TryParse(retryAfterValue, out var retryAfterSeconds)) | ||
| { | ||
| return ValueTask.FromResult<TimeSpan?>(TimeSpan.FromSeconds(retryAfterSeconds)); | ||
| } | ||
| if (!DateTimeOffset.TryParseExact(retryAfterValue, | ||
| "R", // RFC1123 pattern | ||
| System.Globalization.CultureInfo.InvariantCulture, | ||
| System.Globalization.DateTimeStyles.None, | ||
| out var retryAfterDate)) | ||
| { | ||
| return ValueTask.FromResult<TimeSpan?>(null); | ||
| } | ||
| var retryDelay = retryAfterDate - DateTimeOffset.UtcNow; | ||
| return ValueTask.FromResult<TimeSpan?>(retryDelay > TimeSpan.Zero ? retryDelay : TimeSpan.MinValue); | ||
| } | ||
| }; | ||
|
|
||
| public static HttpRetryStrategyOptions DefaultNetworkRetryOptions => | ||
| new() | ||
| { | ||
| MaxRetryAttempts = 7, | ||
| BackoffType = DelayBackoffType.Exponential, | ||
| UseJitter = true, | ||
| Delay = TimeSpan.FromMilliseconds(800), | ||
| ShouldHandle = args => | ||
| { | ||
| if (args.Outcome.Exception is HttpRequestException httpException) | ||
| { | ||
| return ValueTask.FromResult((int)httpException.StatusCode! >= 500 || | ||
| (int)httpException.StatusCode! == 408); | ||
| } | ||
| return ValueTask.FromResult(args.Outcome.Result is not null && | ||
| (args.Outcome.Result.StatusCode == HttpStatusCode.RequestTimeout || | ||
| (int)args.Outcome.Result.StatusCode >= 500)); | ||
| } | ||
| }; | ||
|
|
||
| public static HttpCircuitBreakerStrategyOptions DefaultCircuitBreakerOptions => | ||
| new() | ||
| { | ||
| FailureRatio = 0.5, | ||
| SamplingDuration = TimeSpan.FromSeconds(30), | ||
| MinimumThroughput = 200, | ||
| BreakDuration = TimeSpan.FromSeconds(45), | ||
| ShouldHandle = args => | ||
| { | ||
| if (args.Outcome.Exception is not null) | ||
| { | ||
| return ValueTask.FromResult(true); | ||
| } | ||
| return args.Outcome.Result is null | ||
| ? ValueTask.FromResult(false) | ||
| : ValueTask.FromResult(!args.Outcome.Result.IsSuccessStatusCode); | ||
| } | ||
| }; | ||
| } |
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