Microsoft.Extensions.DependencyInjection

This page demonstrates how ServiceBus.Core components can be registered using the Microsoft dependency injection container.

The examples focus on ServiceBus integration and do not attempt to document the Microsoft DI framework itself.

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Install Package

dotnet add package Microsoft.Extensions.DependencyInjection

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Register Formatter

Example:

services.AddSingleton<IDataFormatter>(
    _ => new MsDataFormatter());

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Register RabbitMQ Infrastructure

services.AddSingleton<IConnectionFactory>(
    _ => new ConnectionFactory
    {
        HostName = "localhost"
    });

services.AddSingleton<IConnection>(
    provider =>
    {
        var factory =
            provider.GetRequiredService<IConnectionFactory>();

        return factory.CreateConnection();
    });

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Register Publisher

The exact registration depends on the descriptor configuration used by the application.

Conceptually:

services.AddSingleton<IAsyncPublisher>(
    provider =>
    {
        // Build publisher
    });

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Register Subscriber

Conceptually:

services.AddSingleton<IAsyncSubscriber<OrderCreated>>(
    provider =>
    {
        // Build subscriber
    });

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Resolve Publisher

var publisher =
    serviceProvider
        .GetRequiredService<IAsyncPublisher>();

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Resolve Subscriber

var subscriber =
    serviceProvider
        .GetRequiredService<
            IAsyncSubscriber<OrderCreated>>();

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Recommended Usage

graph LR

    Application --> ServiceProvider

    ServiceProvider --> Publisher

    ServiceProvider --> Subscriber

The application should depend on abstractions rather than constructing messaging components directly.