PowerPipe 1.1.2

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A .NET Library for Constructing Advanced Workflows with Fluent Interface

PowerPipe is a versatile .NET library designed to streamline the process of building advanced workflows using a fluent interface. The primary objective of this project is to eliminate the need for writing boilerplate code when implementing workflows.

Check out Medium article 👀

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🔥 Features and Benefits

• Lightweight
• Fluent interface
• Ease & Structured Workflow construction
• Dependency Injection support
• Developed using .NET 6

🧐 Sample use case

Imagine creating an e-commerce platform. The platform must process incoming customer orders, each demanding validation, inventory updates, and potentially more intricate steps.

public  class  ECommercePipelineService : IECommercePipelineService
{
    private  readonly  IPipelineStepFactory _pipelineStepFactory;

    private bool PaymentSucceed(ECommerceContext context) => context.PaymentResult.Status is PaymentStatus.Success;

    public  ECommercePipelineService(IPipelineStepFactory pipelineStepFactory)
    {
        _pipelineStepFactory  =  pipelineStepFactory;
    }

    public IPipeline<OrderResult> BuildPipeline()
    {
        var context = new ECommerceContext();

        return new PipelineBuilder<ECommerceContext, OrderResult>(_pipelineStepFactory, context)
            .Add<OrderValidationStep>()
            .Add<PaymentProcessingStep>()
                .OnError(PipelineStepErrorHandling.Retry,  retryInterval:  TimeSpan.FromSeconds(2), maxRetryCount: 2)
            .If(PaymentSucceed, b => b
                .Add<OrderConfirmationStep>()
                .Add<InventoryReservationStep>())
            .Parallel(b => b
                .Add<CustomerNotificationsStep>()
                .Add<AnalyticsAndReportingStep>(), maxDegreeOfParallelism: 2)
            .Build();
    }
}

🛠️ Getting started

Installation

• Package Manager Console

Install-Package PowerPipe
Install-Package PowerPipe.Extensions.MicrosoftDependencyInjection

• .NET CLI

dotnet add package PowerPipe
dotnet add package PowerPipe.Extensions.MicrosoftDependencyInjection

Building pipeline

1. Create pipeline context and result

public class SampleContext : PipelineContext<SampleResult>  
{  
    // Properties and methods specific to the context  
}

public class SampleResult
{
    // Implementation details
}

2. Create pipeline steps

public class SampleStep1 : IPipelineStep<SampleContext>  
{  
    // Implementation details…
}
  
public  class  SampleStep2 : IPipelineStep<OrderContext>  
{  
    // Implementation details…
}

3. Define your pipeline

• Use Add<T> method to add a step to your pipeline

var pipeline = new PipelineBuilder<OrderProcessingContext, Order>()
    .Add<SampleStep1>()
    .Add<SampleStep2>()
    .Build();

• Use AddIf<T> method to add a step to the pipeline based on the predicate

// Define predicate based on context
private bool ExecuteStep2(OrderProcessingContext context) =>
    context.ExecuteStep2Allowed;

var pipeline = new PipelineBuilder<OrderProcessingContext, Order>()
    .Add<SampleStep1>()
    .AddIf<SampleStep2>(ExecuteStep2) 
    .Build();

• Use AddIfElse<TFirst, TSecond> method to add one of the steps by the predicate

private bool ExecuteStep2(OrderProcessingContext context) =>
    context.ExecuteStep2Allowed;

var pipeline = new PipelineBuilder<OrderProcessingContext, Order>()
    .AddIfElse<SampleStep1, SampleStep2>(ExecuteStep2) 
    .Build();

• Use If method to add a nested pipeline based on a predicate

private bool ExecuteNestedPipeline(OrderProcessingContext context) =>
    context.ExecuteNestedPipelineAllowed;

var pipeline = new PipelineBuilder<OrderProcessingContext, Order>()
    .If(ExecuteNestedPipeline, b => b
        .Add<SampleStep1>()
        .Add<SampleStep2>())
    .Build();

• Use Parallel method to execute your steps in parallel

In order to execute steps in parallel your steps should implement IPipelineParallelStep<TContext> interface

var pipeline = new PipelineBuilder<OrderProcessingContext, Order>()
    .Parallel(b => b  
        .Add<SampleParallelStep1>()
        .Add<SampleParallelStep2>(), maxDegreeOfParallelism: 3)
    .Build();

• Use OnError method to add error-handling behavior

Currently available only two types of error handling Suppress and Retry

var pipeline = new PipelineBuilder<OrderProcessingContext, Order>()
    .Add<SampleStep1>()
        .OnError(PipelineStepErrorHandling.Retry)
    .Build();

• Use CompensateWith method to add a compensation step to the previously added step in the pipeline

Compensation steps should implement IPipelineCompensationStep<TContext>

public class SampleStep1Compensation : IPipelineCompensationStep<SampleContext> {}

var pipeline = new PipelineBuilder<OrderProcessingContext, Order>()
    .Add<SampleStep1>()
        .CompensateWith<SampleStep1Compensation>()
    .Build();

4. Extensions: Microsoft Dependency Injection The PowerPipe.Extensions.MicrosoftDependencyInjection extension provides integration with Microsoft Dependency Injection.

• Use AddPowerPipe to register step factory

public static IServiceCollection AddPowerPipe(this IServiceCollection serviceCollection)

• Use AddPowerPipeStep, AddPowerPipeParallelStep, AddPowerPipeCompensationStep methods to register your steps

services  
    .AddPowerPipeStep<SampleStep1, SampleContext>()
    .AddPowerPipeParallelStep<SampleParallelStep1, SampleContext>()
    .AddPowerPipeCompensationStep<SampleStep1Compensation, SampleContext>()
    // other steps ...  
    ;

Check out sample project 👀