Puffix.IoC.Configuration 3.3.0

Puffix IoC Configuration

Extension for including Microsoft.Extensions.Configuration in the Puffix IoC library.

Minimal implementation

In the sample below, Autofac is used.

First, a base class is needed to reference the objects to map:

using Autofac;
using Microsoft.Extensions.Configuration;
using Puffix.IoC;
using Puffix.IoC.Configuration;

namespace YourAppName;

public class IoCContainer : IIoCContainerWithConfiguration
{
    private readonly IContainer? container;

    public IConfigurationRoot ConfigurationRoot { get; }

    public IoCContainer(ContainerBuilder containerBuilder, IConfigurationRoot configuration)
    {
        // Self-register the container.
        containerBuilder.Register(_ => this).As<IIoCContainerWithConfiguration>().SingleInstance();
        containerBuilder.Register(_ => this).As<IIoCContainer>().SingleInstance();

        container = containerBuilder.Build();
        ConfigurationRoot = configuration;
    }

    public static IIoCContainerWithConfiguration BuildContainer(IConfigurationRoot configuration)
    {
        ContainerBuilder containerBuilder = new ContainerBuilder();

        containerBuilder.RegisterAssemblyTypes
                        (
                            typeof(IoCContainer).Assembly // Current Assembly.
                        )
                        .AsSelf()
                        .AsImplementedInterfaces();

        containerBuilder.RegisterInstance(configuration).SingleInstance();

        return new IoCContainer(containerBuilder, configuration);
    }

    public ObjectT Resolve<ObjectT>(params IoCNamedParameter[] parameters)
        where ObjectT : class
    {
        if (container == null)
            throw new ArgumentNullException($"The class {GetType().Name} is not well initialized.");

        ObjectT resolvedObject;
        if (parameters != null)
            resolvedObject = container.Resolve<ObjectT>(ConvertIoCNamedParametersToAutfac(parameters));
        else
            resolvedObject = container.Resolve<ObjectT>();

        return resolvedObject;
    }

    public object Resolve(Type objectType, params IoCNamedParameter[] parameters)
    {
        if (container == null)
            throw new ArgumentNullException($"The class {GetType().Name} is not well initialized.");

        object resolvedObject;
        if (parameters != null)
            resolvedObject = container.Resolve(objectType, ConvertIoCNamedParametersToAutfac(parameters));
        else
            resolvedObject = container.Resolve(objectType);

        return resolvedObject;
    }

    private IEnumerable<NamedParameter> ConvertIoCNamedParametersToAutfac(IEnumerable<IoCNamedParameter> parameters)
    {
        foreach (var parameter in parameters)
        {
            if (parameter != null)
                yield return new NamedParameter(parameter.Name, parameter.Value);
        }
    }
}

To access Microsoft .NET configuration framework, you need to reference some Microsoft.Extensions.Configuration.* packages.

In the sample below, the following packages are referenced:

• Microsoft.Extensions.Configuration.Binder to easily get typed values,
• Microsoft.Extensions.Configuration.Json to load configuration from a json file.

The container may be initialized like this:

IConfigurationRoot configuration = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("appSettings.json", optional: false, reloadOnChange: true)
            .Build();

IIoCContainerWithConfiguration container = IoCContainer.BuildContainer();

And then you can resolve your objects in the code:

MyObject myObject = container.Resolve<MyObject>();

You can also access to the configuration like this:

string myStringParameter = container.ConfigurationRoot[nameof(myStringParameter)];
long myLongParameter = container.ConfigurationRoot.GetValue<int>(nameof(myLongParameter));

Use Polly to manage HttpClient

Polly is a library used to better manage the HttpClient instances.

The following packages are needed:

• Autofac.Extensions.DependencyInjection,
• Microsoft.Extensions.Http,
• Microsoft.Extensions.Http.Polly,
• Polly.

First, a base class is needed to reference the objects to map:

using Autofac;
using Autofac.Extensions.DependencyInjection;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Puffix.IoC;
using Puffix.IoC.Configuration;

namespace YourAppName;

public class IoCContainer : IIoCContainerWithConfiguration
{
    private readonly IContainer? container;

    public IConfigurationRoot ConfigurationRoot { get; }

    public IoCContainer(ContainerBuilder containerBuilder, IConfigurationRoot configuration)
    {
        // Self-register the container.
        containerBuilder.Register(_ => this).As<IIoCContainerWithConfiguration>().SingleInstance();
        containerBuilder.Register(_ => this).As<IIoCContainer>().SingleInstance();

        container = containerBuilder.Build();
        ConfigurationRoot = configuration;
    }

    public static IIoCContainerWithConfiguration BuildContainer(IConfigurationRoot configuration)
    {
        // Register HttpClientMessageFactory
        ServiceCollection services = new ServiceCollection();
        services.AddHttpClient();

        AutofacServiceProviderFactory providerFactory = new AutofacServiceProviderFactory();
        ContainerBuilder containerBuilder = providerFactory.CreateBuilder(services);

        containerBuilder.RegisterAssemblyTypes
                        (
                            typeof(IoCContainer).Assembly // Current Assembly.
                        )
                        .AsSelf()
                        .AsImplementedInterfaces();

        containerBuilder.RegisterInstance(configuration).SingleInstance();

        return new IoCContainer(containerBuilder, configuration);
    }

    public ObjectT Resolve<ObjectT>(params IoCNamedParameter[] parameters)
        where ObjectT : class
    {
        if (container == null)
            throw new ArgumentNullException($"The class {GetType().Name} is not well initialized.");

        ObjectT resolvedObject;
        if (parameters != null)
            resolvedObject = container.Resolve<ObjectT>(ConvertIoCNamedParametersToAutfac(parameters));
        else
            resolvedObject = container.Resolve<ObjectT>();

        return resolvedObject;
    }

    public object Resolve(Type objectType, params IoCNamedParameter[] parameters)
    {
        if (container == null)
            throw new ArgumentNullException($"The class {GetType().Name} is not well initialized.");

        object resolvedObject;
        if (parameters != null)
            resolvedObject = container.Resolve(objectType, ConvertIoCNamedParametersToAutfac(parameters));
        else
            resolvedObject = container.Resolve(objectType);

        return resolvedObject;
    }

    private IEnumerable<NamedParameter> ConvertIoCNamedParametersToAutfac(IEnumerable<IoCNamedParameter> parameters)
    {
        foreach (var parameter in parameters)
        {
            if (parameter != null)
                yield return new NamedParameter(parameter.Name, parameter.Value);
        }
    }
}

The container may be initialized like this:

IConfigurationRoot configuration = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("appSettings.json", optional: false, reloadOnChange: true)
            .Build();

IIoCContainerWithConfiguration container = IoCContainer.BuildContainer();

And then you can resolve your objects in the code:

MyObject myObject = container.Resolve<MyObject>();

You can also access to the configuration like this (refer to the paragraph below for the required packages):

string myStringParameter = container.ConfigurationRoot[nameof(myStringParameter)];
long myLongParameter = container.ConfigurationRoot.GetValue<int>(nameof(myLongParameter));

Finally, here is a sample class where an HttpClient is needed:

using System.Text.Json;

namespace Puffix.Ovh.Api.Infra;

public MyClassWithHttpClient
{
    private readonly IHttpClientFactory httpClientFactory;

    public MyClassWithHttpClient(IHttpClientFactory httpClientFactory)
    {
        this.httpClientFactory = httpClientFactory;
    }

    public Task<string> CallHttpAsync(Uri targetUri)
    {
        using HttpClient httpClient = httpClientFactory.CreateClient();

        await AddHeadersAsync(httpClient, queryInformation);

        using HttpResponseMessage response = await httpClient.GetAsync(targetUri);

        if (!response.IsSuccessStatusCode)
        {
            string errorContent = await response.Content.ReadAsStringAsync();
            throw new Exception($"Error {response.StatusCode}: {response.ReasonPhrase} >> {errorContent}");
        }

        return  await response.Content.ReadAsStringAsync();
    }
}