public TestService(ILogger logger, OneTimeOptions options, MonitorOptions monitor)
{
_logger = logger;
_options = options;
_monitor = monitor;
_logger.LogInformation($"In TestService constructor!!! {options}");
_logger.LogInformation($"In TestService constructor!!! {_monitor}");
}
public TestServiceInject(ILogger <TestServiceInject> logger, IOptions <OneTimeOptions> options, IOptions <MonitorOptions> monitor)
{
_logger = logger;
_options = options.Value;
_monitor = monitor.Value;
_logger.LogInformation($"In TestServiceInject constructor!!! {options}");
_logger.LogInformation($"In TestServiceInject constructor!!! {_monitor}");
}
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddSwaggerGen(c =>
{
c.SwaggerDoc("v1", new OpenApiInfo {
Title = "aspnet_webapi", Version = "v1"
});
});
// added for this test
services.AddOptions <OneTimeOptions>()
.Bind(Configuration.GetSection(OneTimeOptions.Config))
.ValidateDataAnnotations();
services.AddOptions <SnapshotOptions>()
.Bind(Configuration.GetSection(SnapshotOptions.Config))
.ValidateDataAnnotations();
services.AddOptions <MonitorOptions>()
.Bind(Configuration.GetSection(MonitorOptions.Config))
.ValidateDataAnnotations();
// https://stackoverflow.com/questions/52258443/how-to-get-ioptions-in-configureservices-method-or-pass-ioptions-into-extension/52268943
// Option 1 for getting IOption into singleton, can only use the class
var oneTime = new OneTimeOptions();
Configuration.GetSection(OneTimeOptions.Config).Bind(oneTime);
// Option 2, can use IOptionsMonitor<MonitorOptions> or MonitorOptions as parameter
// if use .Value, it will validate here.
// but this generates ASP0000 warning and is not recommended by MS
// see https://docs.microsoft.com/en-us/aspnet/core/fundamentals/dependency-injection?view=aspnetcore-5.0#recommendations
#pragma warning disable ASP0000
using var serviceProvider = services.BuildServiceProvider();
#pragma warning restore ASP0000
// need to validate here since calling .Value later
var monitor = serviceProvider.GetRequiredService <IOptions <MonitorOptions> >();
if (!monitor.IsValid(_logger))
{
throw new ArgumentException("One or more Options are invalid");
}
services.AddSingleton <ITestService>(
new TestService(_logger, oneTime, monitor.Value) // constructed now
);
services.AddSingleton <ITestServiceInject, TestServiceInject>(); // constructed on first call so Configure can validate
}
