agrynco
1631786ce2
Add push contracts, provider delivery and channel diagnostics. Link email channels to services and document migration and validation. Ref: IT-1074
37 lines
2.0 KiB
C#
37 lines
2.0 KiB
C#
namespace HrynCo.NotificationService.DAL.EF.Repositories;
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using HrynCo.NotificationService.DAL.Abstract.Push;
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using HrynCo.NotificationService.DAL.EF.Entities;
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using Microsoft.EntityFrameworkCore;
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public sealed class PushDeliveryRepository(NotificationDbContext db) : IPushDeliveryRepository
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{
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public async Task<PushDeliveryOutcome> DeliverOnceAsync(Guid messageId, string serviceName,
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Func<CancellationToken, Task<PushDeliveryOutcome>> deliver, CancellationToken cancellationToken)
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{
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// Thirty days exceeds the maximum payload lifetime; old replays cannot send expired data.
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var cutoff = DateTimeOffset.UtcNow.AddDays(-30);
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await db.Set<PushDeliveryEntity>().Where(x => x.CompletedAt < cutoff).ExecuteDeleteAsync(cancellationToken);
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await using var transaction = await db.Database.BeginTransactionAsync(cancellationToken);
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var identity = $"{serviceName}:{messageId:D}";
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await db.Database.ExecuteSqlInterpolatedAsync(
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$"SELECT pg_advisory_xact_lock(hashtextextended({identity}, 1074))", cancellationToken);
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var previous = await db.Set<PushDeliveryEntity>().AsNoTracking()
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.SingleOrDefaultAsync(x => x.MessageId == messageId && x.ServiceName == serviceName, cancellationToken);
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if (previous is not null)
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return new PushDeliveryOutcome(previous.Error, previous.InvalidRegistration);
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// One bounded provider call while holding this message's lock prevents concurrent sends.
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// A crash after FCM accepts still requires client-side message-id deduplication.
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var outcome = await deliver(cancellationToken);
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db.Add(new PushDeliveryEntity
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{
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MessageId = messageId, ServiceName = serviceName, Error = outcome.Error,
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InvalidRegistration = outcome.InvalidRegistration, CompletedAt = DateTimeOffset.UtcNow
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});
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await db.SaveChangesAsync(cancellationToken);
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await transaction.CommitAsync(cancellationToken);
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return outcome;
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}
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}
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