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Introduce LMDB oplog store, migration flags, telemetry/backfill tooling, and parity tests to enable staged Surreal-to-LMDB rollout with rollback coverage.
55 lines
2.2 KiB
C#
55 lines
2.2 KiB
C#
using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.DependencyInjection.Extensions;
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using ZB.MOM.WW.CBDDC.Core.Storage;
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using ZB.MOM.WW.CBDDC.Persistence.Surreal;
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namespace ZB.MOM.WW.CBDDC.Persistence.Lmdb;
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/// <summary>
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/// Extension methods for adding the LMDB oplog provider and migration feature flags.
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/// </summary>
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public static class CBDDCLmdbOplogExtensions
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{
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/// <summary>
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/// Registers LMDB oplog services and replaces <see cref="IOplogStore" /> with a feature-flag migration router.
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/// </summary>
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/// <param name="services">The service collection.</param>
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/// <param name="optionsFactory">Factory creating LMDB environment options.</param>
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/// <param name="configureFlags">Optional migration feature-flag configuration.</param>
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/// <returns>The service collection.</returns>
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public static IServiceCollection AddCBDDCLmdbOplog(
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this IServiceCollection services,
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Func<IServiceProvider, LmdbOplogOptions> optionsFactory,
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Action<LmdbOplogFeatureFlags>? configureFlags = null)
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{
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if (services == null) throw new ArgumentNullException(nameof(services));
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if (optionsFactory == null) throw new ArgumentNullException(nameof(optionsFactory));
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services.TryAddSingleton(optionsFactory);
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var flags = new LmdbOplogFeatureFlags
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{
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UseLmdbOplog = true,
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DualWriteOplog = true,
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PreferLmdbReads = false,
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EnableReadShadowValidation = false
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};
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configureFlags?.Invoke(flags);
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services.TryAddSingleton(flags);
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services.TryAddSingleton<OplogMigrationTelemetry>();
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services.TryAddSingleton<LmdbOplogStore>();
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bool surrealRegistered = services.Any(descriptor => descriptor.ServiceType == typeof(SurrealOplogStore));
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if (surrealRegistered)
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{
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services.TryAddSingleton<LmdbOplogBackfillTool>();
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services.Replace(ServiceDescriptor.Singleton<IOplogStore, FeatureFlagOplogStore>());
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}
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else
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services.Replace(ServiceDescriptor.Singleton<IOplogStore>(sp => sp.GetRequiredService<LmdbOplogStore>()));
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return services;
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}
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}
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