This document provides a detailed step-by-step guide on scaling the stevedunn/vogen project in a production environment using C#, PowerShell, and Docker.

1. Setting Up Docker Environment

The project utilizes Docker for consistent deployment across different environments. The provided Dockerfile prepares the application in a containerized environment.

Dockerfile Example

FROM mcr.microsoft.com/dotnet/sdk:7.0

COPY . .

ENTRYPOINT [ "powershell.exe", "./Build.ps1" ]

This Dockerfile uses the .NET SDK version 7.0 as the base image, copies the entire project into the container, and defines Build.ps1 as the entry point.

2. Managing Build Work Items

The production scaling process can be enhanced by customizing the handling of build work items. For instance, the normalization method can be crucial for ensuring data integrity.

Example Code Snippet

private static bool TryHandleNormalizeMethod(
        string? methodName, 
        MethodDeclarationSyntax mds,
        SourceProductionContext context, 
        VogenConfiguration config, 
        VoTarget target)
{
    if (StringComparer.OrdinalIgnoreCase.Compare(methodName, "normalizeinput") != 0)
    {
        return false;
    }

    if (!IsMethodStatic(mds))
    {
        context.ReportDiagnostic(DiagnosticsCatalogue.NormalizeInputMethodMustBeStatic(mds));
        return false;
    }

    if (mds.ParameterList.Parameters.Count != 1)
    {
        context.ReportDiagnostic(DiagnosticsCatalogue.NormalizeInputMethodTakeOneParameterOfUnderlyingType(mds));
        return false;
    }
    // Additional logic...
}

In this code, we ensure that only static methods named normalizeinput with a single parameter are accepted, enhancing method validity checking during builds.

3. Unit Testing for Validation

Unit tests play a critical role in validating that the application behaves as expected under various conditions. Emphasizing validation in production will enhance reliability.

Example Unit Test

public partial struct Struct_NormalizedToMax128WithValidation
{
    private static Validation Validate(int value) => value <= 0 ? Validation.Ok : Validation.Invalid("Value must be positive.");

    private static Int32 NormalizeInput(int input) => Math.Min(128, input);
}

This method ensures that inputs are valid and normalized correctly. Emphasizing such validation is crucial when scaling for production to avoid errors in data handling.

4. Scaling Strategies

4.1 Horizontal Scaling

When faced with increased load, consider deploying multiple instances of the application. This requires container orchestration tools, such as Kubernetes, which can manage the deployment, scaling, and operation of application containers across a cluster of machines.

4.2 Vertical Scaling

Vertical scaling involves increasing the resources of the existing instances. Ensure the container has sufficient memory and CPU resources allocated to handle production loads.

5. Monitoring and Maintenance

Implementing monitoring solutions is essential to evaluate application performance and scalability. Utilize tools like Prometheus or Grafana to track metrics and logs for early detection of issues.

6. Production Deployment

When deploying to production, ensure the environment mirrors the local development setup as closely as possible to avoid discrepancies. The creation and management of deployment scripts in PowerShell enhance automation for the build and deployment pipelines.

Example PowerShell Deployment Script

# Build the Docker image
docker build -t vogen:latest .

# Run the Docker container
docker run -d -p 80:80 --name vogen_container vogen:latest

This script builds the Docker image and runs the container, exposing it on port 80.

Summary

Scaling stevedunn/vogen for production requires thorough preparation through Docker, careful handling of build processes, and strong emphasis on unit testing and validation. With the outlined methods and examples, expert developers can successfully deploy and scale the application in a production environment, ensuring performance, reliability, and maintainability.

Source: Dockerfile, docs/site/Writerside/topics/discussions/Home.md, tests/SnapshotTests/GenerationPermutations/snapshots/snap-v6.0/GqkxwENyM0.verified.txt, tests/AnalyzerTests/NormalizeInputMethodTests.cs, src/Vogen/BuildWorkItems.cs