Joseph Doherty
63 lines
3.4 KiB
C#
63 lines
3.4 KiB
C#
using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.DependencyInjection.Extensions;
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using Microsoft.Extensions.Options;
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using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Transport;
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using ZB.MOM.WW.ScadaBridge.TemplateEngine.Validation;
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using ZB.MOM.WW.ScadaBridge.Transport.Encryption;
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using ZB.MOM.WW.ScadaBridge.Transport.Export;
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using ZB.MOM.WW.ScadaBridge.Transport.Import;
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using ZB.MOM.WW.ScadaBridge.Transport.Serialization;
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namespace ZB.MOM.WW.ScadaBridge.Transport;
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public static class ServiceCollectionExtensions
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{
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public const string OptionsSection = "ScadaBridge:Transport";
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/// <summary>
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/// Registers the Transport component services: encryptor, manifest builder/validator, serializers, resolver, exporter, importer, and session store.
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/// </summary>
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/// <param name="services">The service collection to register into.</param>
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/// <returns>The same <see cref="IServiceCollection"/> to allow chaining.</returns>
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public static IServiceCollection AddTransport(this IServiceCollection services)
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{
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ArgumentNullException.ThrowIfNull(services);
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// Eager startup validation (arch-review 08 §1.5): ValidateOnStart makes a
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// bad ScadaBridge:Transport section — a zero/negative cap, or (critically)
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// a Pbkdf2Iterations below the security floor that would silently weaken
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// bundle key derivation — fail fast at boot with a clear, key-naming
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// message instead of surfacing deep inside the import pipeline.
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services.AddOptions<TransportOptions>().BindConfiguration(OptionsSection).ValidateOnStart();
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services.TryAddEnumerable(
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ServiceDescriptor.Singleton<IValidateOptions<TransportOptions>, TransportOptionsValidator>());
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services.TryAddSingleton(TimeProvider.System);
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// Pipeline building blocks: stateless services live as singletons; the
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// resolver and exporter are scoped because they reach into per-request
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// repository scopes and the scoped DbContext.
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services.AddSingleton<BundleSecretEncryptor>();
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services.AddSingleton<ManifestBuilder>();
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services.AddSingleton<ManifestValidator>();
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services.AddSingleton<BundleSerializer>();
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services.AddSingleton<EntitySerializer>();
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services.AddScoped<DependencyResolver>();
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services.AddScoped<IBundleExporter, BundleExporter>();
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services.AddSingleton<IBundleSessionStore, BundleSessionStore>();
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// T-004: per-IP-per-hour unlock rate limiter — design doc §11. Singleton
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// so the trailing-hour window is shared across every importer scope; the
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// counters live in-memory and reset on host restart (by design).
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services.AddSingleton<BundleUnlockRateLimiter>();
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// T-007: periodic eviction sweep so abandoned sessions clear without
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// needing a fresh Get() to trigger lazy eviction.
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services.AddHostedService<BundleSessionEvictionService>();
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// SemanticValidator is a stateless utility used by ApplyAsync; use
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// TryAdd so a host that already calls AddTemplateEngine() (which
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// registers the same type as Transient) wins. Either registration
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// satisfies the BundleImporter constructor.
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services.TryAddTransient<SemanticValidator>();
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services.AddScoped<IBundleImporter, BundleImporter>();
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// Remaining concrete services added in later tasks.
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return services;
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}
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}
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