using Microsoft.Extensions.DependencyInjection;
 
namespace ConsoleDI.Example;
 
public interface IReportServiceLifetime
{
    Guid Id { get; }
 
    ServiceLifetime Lifetime { get; }
}
 
// 創(chuàng)建了多個(gè)接口和相應(yīng)的實(shí)現(xiàn)。 其中每個(gè)服務(wù)都唯一標(biāo)識(shí)并與 ServiceLifetime 配對(duì)
public interface IExampleTransientService : IReportServiceLifetime
{
    ServiceLifetime IReportServiceLifetime.Lifetime => ServiceLifetime.Transient;
}
 
public interface IExampleScopedService : IReportServiceLifetime
{
    ServiceLifetime IReportServiceLifetime.Lifetime => ServiceLifetime.Scoped;
}
 
public interface IExampleSingletonService : IReportServiceLifetime
{
    ServiceLifetime IReportServiceLifetime.Lifetime => ServiceLifetime.Singleton;
}
 
internal sealed class ExampleTransientService : IExampleTransientService
{
    Guid IReportServiceLifetime.Id { get; } = Guid.NewGuid();
}
 
internal sealed class ExampleScopedService : IExampleScopedService
{
    Guid IReportServiceLifetime.Id { get; } = Guid.NewGuid();
}
 
internal sealed class ExampleSingletonService : IExampleSingletonService
{
    Guid IReportServiceLifetime.Id { get; } = Guid.NewGuid();
}

namespace ConsoleDI.Example;
 
internal sealed class ServiceLifetimeReporter(
    IExampleTransientService transientService,
    IExampleScopedService scopedService,
    IExampleSingletonService singletonService)
{
    public void ReportServiceLifetimeDetails(string lifetimeDetails)
    {
        Console.WriteLine(lifetimeDetails);
 
        LogService(transientService, "每次都是新建的對(duì)象，一直保持不同");
        LogService(scopedService, "在函數(shù)域范圍內(nèi)只創(chuàng)建一次，不同函數(shù)內(nèi)為不同對(duì)象");
        LogService(singletonService, "全局單例，一直是同一個(gè)");
    }
 
    private static void LogService<T>(T service, string message)
        where T : IReportServiceLifetime =>
        Console.WriteLine($"    {typeof(T).Name}: {service.Id} ({message})");
}