/// <summary>
/// Adds registrations to the <paramref name="services"/> collection using
/// conventions specified using the <paramref name="action"/>.
/// </summary>
/// <param name="services">The services to add to.</param>
/// <param name="action">The configuration action.</param>
/// <exception cref="ArgumentNullException">If either the <paramref name="services"/>
/// or <paramref name="action"/> arguments are <c>null</c>.</exception>
public static IServiceCollection Scan([NotNull] this IServiceCollection services, [NotNull] Action <ITypeSourceSelector> action)
{
// 选择器
var selector = new TypeSourceSelector();
action(selector);
// 注册
return(services.Populate(selector, RegistrationStrategy.Append));
}
/// <summary>
/// Adds the subscriber services to the messaging host.
/// The subscriber services are background services (hosted services) that consume messages from the bus.
/// </summary>
/// <param name="builder">The builder is used to configure the message types or topics for which subscriber services are added.</param>
/// <returns>The options builder</returns>
public MessagingHostOptionsBuilder AddSubscriberServices(Action <ITypeSourceSelector> builder)
{
var subscriberServiceSelector = new TypeSourceSelector(ServiceCollection);
builder?.Invoke(subscriberServiceSelector);
var optionsBuilder =
new MessagingHostOptionsBuilder(this, ServiceCollection, subscriberServiceSelector, subscriberServiceSelector);
return(optionsBuilder);
}
/// <summary>
/// Adds registrations to the <paramref name="services"/> collection using
/// conventions specified using the <paramref name="action"/>.
/// </summary>
/// <param name="services">The services to add to.</param>
/// <param name="action">The configuration action.</param>
/// <exception cref="ArgumentNullException">If either the <paramref name="services"/>
/// or <paramref name="action"/> arguments are <c>null</c>.</exception>
public static IServiceCollection Scan(this IServiceCollection services, Action <ITypeSourceSelector> action)
{
Preconditions.NotNull(services, nameof(services));
Preconditions.NotNull(action, nameof(action));
var selector = new TypeSourceSelector();
action(selector);
return(services.Populate(selector, RegistrationStrategy.Append));
}
public static ActivityDefinitionList Discover(
this ActivityDefinitionList list,
Action <ITypeSourceSelector> selector)
{
var typeSourceSelector = new TypeSourceSelector();
selector(typeSourceSelector);
var serviceCollection = new ServiceCollection();
typeSourceSelector.Populate(serviceCollection, RegistrationStrategy.Replace(ReplacementBehavior.All));
foreach (var service in serviceCollection)
{
list.Add(ActivityDescriber.Describe(service.ImplementationType));
}
return(list);
}