Console

Table of Contents

• Summary
• Configuration
• Worker Process
• Injected Services

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Summary

The ConsoleApplication derives from DefaultApplication. It initializes the required services and into a service collection, and is able to handle and resolve dependencies, similar to a web application. This is explained in details further down.

Use the ConsoleApplication when you require to construct a background-worker, cloud function or similar single executing application.

Sample implementation

public class Program
{
    public static void Main()
    {
        ConsoleApplication
            .ConfigureApp()
            .ConfigureServices(x =>
            {
                // Additional dependencies...
            })
            .Build()
            .Run();
    }
}

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Configuration

The Console section of the configuration defines behavior related to the application. The section is deserialized into an instance of ConsoleOptions, and injected as dependency during startup, thus available for injection throughout the application.

See Appendix - App Settings for details about the console section and the meaning of the variables.

Console Section

"Console": 
{

}

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Worker Process

When the console application is run, a background-worker is started and executed until finished, and the application shuts down.

The abstract BaseWorker implements IHostedService, and is the top-most worker implementation. The concrete DefaultWorker implementation derives from BaseWorker, and contains default method implementations of StartAsync and StopAsync. Derive your own worker implementation from DefaultWorker, as shown below.

Sample implementation

public class MyWorker : DefaultWorker
{
    public MyWorker(ILogger logger, IRepository repository, IEventing eventing, IApplicationLifetime applicationLifetime)
        : base(logger, repository, eventing, applicationLifetime)
    {

    }

    public override async Task StartAsync(CancellationToken cancellationToken = default)
    {
        await base.StartAsync(cancellationToken);

        // Custom implementation
    }

    public override async Task StopAsync(CancellationToken cancellationToken = default)
    {
        // Custom implementation

        await base.StopAsync(cancellationToken);  // Stops application
    }
}

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Injected Services

When building the ConsoleHost, dependencies related to hosting is configured and initialized. This evolves around defining the process and environment in which the application is executing in.

Dependencies:

• Nano.Console.ConsoleOptions
• Nano.Console.ConsoleApplication
• Nano.Console.Workers.BaseWorker

For a full list of services and dependencies, see Injected Dependencies

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