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This commit is contained in:
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655
src/StellaOps.Notify.Queue/Redis/RedisNotifyEventQueue.cs
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655
src/StellaOps.Notify.Queue/Redis/RedisNotifyEventQueue.cs
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@@ -0,0 +1,655 @@
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Globalization;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using Microsoft.Extensions.Logging;
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using StackExchange.Redis;
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using StellaOps.Notify.Models;
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namespace StellaOps.Notify.Queue.Redis;
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internal sealed class RedisNotifyEventQueue : INotifyEventQueue, IAsyncDisposable
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{
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private const string TransportName = "redis";
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private readonly NotifyEventQueueOptions _options;
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private readonly NotifyRedisEventQueueOptions _redisOptions;
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private readonly ILogger<RedisNotifyEventQueue> _logger;
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private readonly TimeProvider _timeProvider;
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private readonly Func<ConfigurationOptions, Task<IConnectionMultiplexer>> _connectionFactory;
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private readonly SemaphoreSlim _connectionLock = new(1, 1);
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private readonly SemaphoreSlim _groupInitLock = new(1, 1);
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private readonly IReadOnlyDictionary<string, NotifyRedisEventStreamOptions> _streamsByName;
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private readonly ConcurrentDictionary<string, bool> _initializedStreams = new(StringComparer.Ordinal);
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private IConnectionMultiplexer? _connection;
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private bool _disposed;
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public RedisNotifyEventQueue(
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NotifyEventQueueOptions options,
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NotifyRedisEventQueueOptions redisOptions,
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ILogger<RedisNotifyEventQueue> logger,
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TimeProvider timeProvider,
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Func<ConfigurationOptions, Task<IConnectionMultiplexer>>? connectionFactory = null)
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{
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_options = options ?? throw new ArgumentNullException(nameof(options));
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_redisOptions = redisOptions ?? throw new ArgumentNullException(nameof(redisOptions));
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_logger = logger ?? throw new ArgumentNullException(nameof(logger));
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_timeProvider = timeProvider ?? TimeProvider.System;
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_connectionFactory = connectionFactory ?? (async config =>
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{
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var connection = await ConnectionMultiplexer.ConnectAsync(config).ConfigureAwait(false);
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return (IConnectionMultiplexer)connection;
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});
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if (string.IsNullOrWhiteSpace(_redisOptions.ConnectionString))
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{
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throw new InvalidOperationException("Redis connection string must be configured for Notify event queue.");
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}
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_streamsByName = _redisOptions.Streams.ToDictionary(
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stream => stream.Stream,
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stream => stream,
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StringComparer.Ordinal);
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}
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public async ValueTask<NotifyQueueEnqueueResult> PublishAsync(
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NotifyQueueEventMessage message,
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CancellationToken cancellationToken = default)
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{
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ArgumentNullException.ThrowIfNull(message);
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cancellationToken.ThrowIfCancellationRequested();
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var streamOptions = GetStreamOptions(message.Stream);
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var db = await GetDatabaseAsync(cancellationToken).ConfigureAwait(false);
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await EnsureStreamInitializedAsync(db, streamOptions, cancellationToken).ConfigureAwait(false);
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var now = _timeProvider.GetUtcNow();
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var entries = BuildEntries(message, now, attempt: 1);
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var messageId = await AddToStreamAsync(
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db,
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streamOptions,
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entries)
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.ConfigureAwait(false);
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var idempotencyToken = string.IsNullOrWhiteSpace(message.IdempotencyKey)
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? message.Event.EventId.ToString("N")
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: message.IdempotencyKey;
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var idempotencyKey = streamOptions.IdempotencyKeyPrefix + idempotencyToken;
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var stored = await db.StringSetAsync(
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idempotencyKey,
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messageId,
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when: When.NotExists,
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expiry: _redisOptions.IdempotencyWindow)
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.ConfigureAwait(false);
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if (!stored)
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{
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await db.StreamDeleteAsync(
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streamOptions.Stream,
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new RedisValue[] { messageId })
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.ConfigureAwait(false);
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var existing = await db.StringGetAsync(idempotencyKey).ConfigureAwait(false);
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var duplicateId = existing.IsNullOrEmpty ? messageId : existing;
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_logger.LogDebug(
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"Duplicate Notify event enqueue detected for idempotency token {Token}; returning existing stream id {StreamId}.",
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idempotencyToken,
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duplicateId.ToString());
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NotifyQueueMetrics.RecordDeduplicated(TransportName, streamOptions.Stream);
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return new NotifyQueueEnqueueResult(duplicateId.ToString()!, true);
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}
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NotifyQueueMetrics.RecordEnqueued(TransportName, streamOptions.Stream);
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_logger.LogDebug(
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"Enqueued Notify event {EventId} for tenant {Tenant} on stream {Stream} (id {StreamId}).",
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message.Event.EventId,
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message.TenantId,
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streamOptions.Stream,
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messageId.ToString());
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return new NotifyQueueEnqueueResult(messageId.ToString()!, false);
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}
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public async ValueTask<IReadOnlyList<INotifyQueueLease<NotifyQueueEventMessage>>> LeaseAsync(
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NotifyQueueLeaseRequest request,
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CancellationToken cancellationToken = default)
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{
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ArgumentNullException.ThrowIfNull(request);
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cancellationToken.ThrowIfCancellationRequested();
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var db = await GetDatabaseAsync(cancellationToken).ConfigureAwait(false);
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var now = _timeProvider.GetUtcNow();
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var leases = new List<INotifyQueueLease<NotifyQueueEventMessage>>(request.BatchSize);
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foreach (var streamOptions in _streamsByName.Values)
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{
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await EnsureStreamInitializedAsync(db, streamOptions, cancellationToken).ConfigureAwait(false);
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var remaining = request.BatchSize - leases.Count;
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if (remaining <= 0)
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{
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break;
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}
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var entries = await db.StreamReadGroupAsync(
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streamOptions.Stream,
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streamOptions.ConsumerGroup,
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request.Consumer,
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StreamPosition.NewMessages,
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remaining)
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.ConfigureAwait(false);
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if (entries is null || entries.Length == 0)
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{
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continue;
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}
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foreach (var entry in entries)
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{
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var lease = TryMapLease(
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streamOptions,
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entry,
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request.Consumer,
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now,
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request.LeaseDuration,
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attemptOverride: null);
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if (lease is null)
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{
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await AckPoisonAsync(db, streamOptions, entry.Id).ConfigureAwait(false);
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continue;
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}
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leases.Add(lease);
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if (leases.Count >= request.BatchSize)
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{
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break;
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}
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}
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}
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return leases;
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}
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public async ValueTask<IReadOnlyList<INotifyQueueLease<NotifyQueueEventMessage>>> ClaimExpiredAsync(
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NotifyQueueClaimOptions options,
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CancellationToken cancellationToken = default)
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{
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ArgumentNullException.ThrowIfNull(options);
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cancellationToken.ThrowIfCancellationRequested();
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var db = await GetDatabaseAsync(cancellationToken).ConfigureAwait(false);
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var now = _timeProvider.GetUtcNow();
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var leases = new List<INotifyQueueLease<NotifyQueueEventMessage>>(options.BatchSize);
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foreach (var streamOptions in _streamsByName.Values)
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{
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await EnsureStreamInitializedAsync(db, streamOptions, cancellationToken).ConfigureAwait(false);
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var pending = await db.StreamPendingMessagesAsync(
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streamOptions.Stream,
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streamOptions.ConsumerGroup,
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options.BatchSize,
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RedisValue.Null,
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(long)options.MinIdleTime.TotalMilliseconds)
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.ConfigureAwait(false);
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if (pending is null || pending.Length == 0)
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{
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continue;
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}
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var eligible = pending
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.Where(p => p.IdleTimeInMilliseconds >= options.MinIdleTime.TotalMilliseconds)
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.ToArray();
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if (eligible.Length == 0)
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{
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continue;
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}
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var messageIds = eligible
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.Select(static p => (RedisValue)p.MessageId)
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.ToArray();
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var entries = await db.StreamClaimAsync(
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streamOptions.Stream,
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streamOptions.ConsumerGroup,
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options.ClaimantConsumer,
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0,
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messageIds)
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.ConfigureAwait(false);
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if (entries is null || entries.Length == 0)
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{
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continue;
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}
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var attemptById = eligible
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.Where(static info => !info.MessageId.IsNullOrEmpty)
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.ToDictionary(
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info => info.MessageId!.ToString(),
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info => (int)Math.Max(1, info.DeliveryCount),
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StringComparer.Ordinal);
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foreach (var entry in entries)
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{
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var entryId = entry.Id.ToString();
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attemptById.TryGetValue(entryId, out var attempt);
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var lease = TryMapLease(
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streamOptions,
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entry,
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options.ClaimantConsumer,
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now,
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_options.DefaultLeaseDuration,
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attempt == 0 ? null : attempt);
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if (lease is null)
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{
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await AckPoisonAsync(db, streamOptions, entry.Id).ConfigureAwait(false);
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continue;
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}
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leases.Add(lease);
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if (leases.Count >= options.BatchSize)
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{
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return leases;
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}
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}
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}
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return leases;
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}
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public async ValueTask DisposeAsync()
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{
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if (_disposed)
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{
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return;
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}
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_disposed = true;
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if (_connection is not null)
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{
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await _connection.CloseAsync();
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_connection.Dispose();
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}
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_connectionLock.Dispose();
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_groupInitLock.Dispose();
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GC.SuppressFinalize(this);
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}
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internal async Task AcknowledgeAsync(
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RedisNotifyEventLease lease,
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CancellationToken cancellationToken)
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{
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if (!lease.TryBeginCompletion())
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{
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return;
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}
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var db = await GetDatabaseAsync(cancellationToken).ConfigureAwait(false);
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var streamOptions = lease.StreamOptions;
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await db.StreamAcknowledgeAsync(
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streamOptions.Stream,
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streamOptions.ConsumerGroup,
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new RedisValue[] { lease.MessageId })
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.ConfigureAwait(false);
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await db.StreamDeleteAsync(
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streamOptions.Stream,
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new RedisValue[] { lease.MessageId })
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.ConfigureAwait(false);
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NotifyQueueMetrics.RecordAck(TransportName, streamOptions.Stream);
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_logger.LogDebug(
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"Acknowledged Notify event {EventId} on consumer {Consumer} (stream {Stream}, id {MessageId}).",
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lease.Message.Event.EventId,
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lease.Consumer,
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streamOptions.Stream,
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lease.MessageId);
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}
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internal async Task RenewLeaseAsync(
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RedisNotifyEventLease lease,
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TimeSpan leaseDuration,
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CancellationToken cancellationToken)
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{
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var db = await GetDatabaseAsync(cancellationToken).ConfigureAwait(false);
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var streamOptions = lease.StreamOptions;
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await db.StreamClaimAsync(
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streamOptions.Stream,
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streamOptions.ConsumerGroup,
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lease.Consumer,
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0,
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new RedisValue[] { lease.MessageId })
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.ConfigureAwait(false);
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var expires = _timeProvider.GetUtcNow().Add(leaseDuration);
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lease.RefreshLease(expires);
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_logger.LogDebug(
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"Renewed Notify event lease for {EventId} until {Expires:u}.",
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lease.Message.Event.EventId,
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expires);
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}
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internal Task ReleaseAsync(
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RedisNotifyEventLease lease,
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NotifyQueueReleaseDisposition disposition,
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CancellationToken cancellationToken)
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=> Task.FromException(new NotSupportedException("Retry/abandon is not supported for Notify event streams."));
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internal async Task DeadLetterAsync(
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RedisNotifyEventLease lease,
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string reason,
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CancellationToken cancellationToken)
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{
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if (!lease.TryBeginCompletion())
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{
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return;
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}
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var db = await GetDatabaseAsync(cancellationToken).ConfigureAwait(false);
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var streamOptions = lease.StreamOptions;
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await db.StreamAcknowledgeAsync(
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streamOptions.Stream,
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streamOptions.ConsumerGroup,
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new RedisValue[] { lease.MessageId })
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.ConfigureAwait(false);
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await db.StreamDeleteAsync(
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streamOptions.Stream,
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new RedisValue[] { lease.MessageId })
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.ConfigureAwait(false);
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_logger.LogWarning(
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"Dead-lettered Notify event {EventId} on stream {Stream} with reason '{Reason}'.",
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lease.Message.Event.EventId,
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streamOptions.Stream,
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reason);
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}
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internal async ValueTask PingAsync(CancellationToken cancellationToken)
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{
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var db = await GetDatabaseAsync(cancellationToken).ConfigureAwait(false);
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_ = await db.PingAsync().ConfigureAwait(false);
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}
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private NotifyRedisEventStreamOptions GetStreamOptions(string stream)
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{
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if (!_streamsByName.TryGetValue(stream, out var options))
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{
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throw new InvalidOperationException($"Stream '{stream}' is not configured for the Notify event queue.");
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}
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return options;
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}
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private async Task<IDatabase> GetDatabaseAsync(CancellationToken cancellationToken)
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{
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if (_connection is { IsConnected: true })
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{
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return _connection.GetDatabase(_redisOptions.Database ?? -1);
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}
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await _connectionLock.WaitAsync(cancellationToken).ConfigureAwait(false);
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try
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{
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if (_connection is { IsConnected: true })
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{
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return _connection.GetDatabase(_redisOptions.Database ?? -1);
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}
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var configuration = ConfigurationOptions.Parse(_redisOptions.ConnectionString!);
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configuration.AbortOnConnectFail = false;
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if (_redisOptions.Database.HasValue)
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{
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configuration.DefaultDatabase = _redisOptions.Database;
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}
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using var timeoutCts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
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timeoutCts.CancelAfter(_redisOptions.InitializationTimeout);
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_connection = await _connectionFactory(configuration).WaitAsync(timeoutCts.Token).ConfigureAwait(false);
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return _connection.GetDatabase(_redisOptions.Database ?? -1);
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}
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finally
|
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{
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_connectionLock.Release();
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}
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}
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private async Task EnsureStreamInitializedAsync(
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IDatabase database,
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NotifyRedisEventStreamOptions streamOptions,
|
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CancellationToken cancellationToken)
|
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{
|
||||
if (_initializedStreams.ContainsKey(streamOptions.Stream))
|
||||
{
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return;
|
||||
}
|
||||
|
||||
await _groupInitLock.WaitAsync(cancellationToken).ConfigureAwait(false);
|
||||
try
|
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{
|
||||
if (_initializedStreams.ContainsKey(streamOptions.Stream))
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
try
|
||||
{
|
||||
await database.StreamCreateConsumerGroupAsync(
|
||||
streamOptions.Stream,
|
||||
streamOptions.ConsumerGroup,
|
||||
StreamPosition.Beginning,
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createStream: true)
|
||||
.ConfigureAwait(false);
|
||||
}
|
||||
catch (RedisServerException ex) when (ex.Message.Contains("BUSYGROUP", StringComparison.OrdinalIgnoreCase))
|
||||
{
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||||
// Consumer group already exists — nothing to do.
|
||||
}
|
||||
|
||||
_initializedStreams[streamOptions.Stream] = true;
|
||||
}
|
||||
finally
|
||||
{
|
||||
_groupInitLock.Release();
|
||||
}
|
||||
}
|
||||
|
||||
private static async Task<RedisValue> AddToStreamAsync(
|
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IDatabase database,
|
||||
NotifyRedisEventStreamOptions streamOptions,
|
||||
IReadOnlyList<NameValueEntry> entries)
|
||||
{
|
||||
return await database.StreamAddAsync(
|
||||
streamOptions.Stream,
|
||||
entries.ToArray(),
|
||||
maxLength: streamOptions.ApproximateMaxLength,
|
||||
useApproximateMaxLength: streamOptions.ApproximateMaxLength is not null)
|
||||
.ConfigureAwait(false);
|
||||
}
|
||||
|
||||
private IReadOnlyList<NameValueEntry> BuildEntries(
|
||||
NotifyQueueEventMessage message,
|
||||
DateTimeOffset enqueuedAt,
|
||||
int attempt)
|
||||
{
|
||||
var payload = NotifyCanonicalJsonSerializer.Serialize(message.Event);
|
||||
|
||||
var entries = new List<NameValueEntry>(8 + message.Attributes.Count)
|
||||
{
|
||||
new(NotifyQueueFields.Payload, payload),
|
||||
new(NotifyQueueFields.EventId, message.Event.EventId.ToString("D")),
|
||||
new(NotifyQueueFields.Tenant, message.TenantId),
|
||||
new(NotifyQueueFields.Kind, message.Event.Kind),
|
||||
new(NotifyQueueFields.Attempt, attempt),
|
||||
new(NotifyQueueFields.EnqueuedAt, enqueuedAt.ToUnixTimeMilliseconds()),
|
||||
new(NotifyQueueFields.IdempotencyKey, message.IdempotencyKey),
|
||||
new(NotifyQueueFields.PartitionKey, message.PartitionKey ?? string.Empty),
|
||||
new(NotifyQueueFields.TraceId, message.TraceId ?? string.Empty)
|
||||
};
|
||||
|
||||
foreach (var kvp in message.Attributes)
|
||||
{
|
||||
entries.Add(new NameValueEntry(
|
||||
NotifyQueueFields.AttributePrefix + kvp.Key,
|
||||
kvp.Value));
|
||||
}
|
||||
|
||||
return entries;
|
||||
}
|
||||
|
||||
private RedisNotifyEventLease? TryMapLease(
|
||||
NotifyRedisEventStreamOptions streamOptions,
|
||||
StreamEntry entry,
|
||||
string consumer,
|
||||
DateTimeOffset now,
|
||||
TimeSpan leaseDuration,
|
||||
int? attemptOverride)
|
||||
{
|
||||
if (entry.Values is null || entry.Values.Length == 0)
|
||||
{
|
||||
return null;
|
||||
}
|
||||
|
||||
string? payloadJson = null;
|
||||
string? eventIdRaw = null;
|
||||
long? enqueuedAtUnix = null;
|
||||
string? idempotency = null;
|
||||
string? partitionKey = null;
|
||||
string? traceId = null;
|
||||
var attempt = attemptOverride ?? 1;
|
||||
var attributes = new Dictionary<string, string>(StringComparer.Ordinal);
|
||||
|
||||
foreach (var field in entry.Values)
|
||||
{
|
||||
var name = field.Name.ToString();
|
||||
var value = field.Value;
|
||||
if (name.Equals(NotifyQueueFields.Payload, StringComparison.Ordinal))
|
||||
{
|
||||
payloadJson = value.ToString();
|
||||
}
|
||||
else if (name.Equals(NotifyQueueFields.EventId, StringComparison.Ordinal))
|
||||
{
|
||||
eventIdRaw = value.ToString();
|
||||
}
|
||||
else if (name.Equals(NotifyQueueFields.Attempt, StringComparison.Ordinal))
|
||||
{
|
||||
if (int.TryParse(value.ToString(), NumberStyles.Integer, CultureInfo.InvariantCulture, out var parsed))
|
||||
{
|
||||
attempt = Math.Max(parsed, attempt);
|
||||
}
|
||||
}
|
||||
else if (name.Equals(NotifyQueueFields.EnqueuedAt, StringComparison.Ordinal))
|
||||
{
|
||||
if (long.TryParse(value.ToString(), NumberStyles.Integer, CultureInfo.InvariantCulture, out var unix))
|
||||
{
|
||||
enqueuedAtUnix = unix;
|
||||
}
|
||||
}
|
||||
else if (name.Equals(NotifyQueueFields.IdempotencyKey, StringComparison.Ordinal))
|
||||
{
|
||||
var text = value.ToString();
|
||||
idempotency = string.IsNullOrWhiteSpace(text) ? null : text;
|
||||
}
|
||||
else if (name.Equals(NotifyQueueFields.PartitionKey, StringComparison.Ordinal))
|
||||
{
|
||||
var text = value.ToString();
|
||||
partitionKey = string.IsNullOrWhiteSpace(text) ? null : text;
|
||||
}
|
||||
else if (name.Equals(NotifyQueueFields.TraceId, StringComparison.Ordinal))
|
||||
{
|
||||
var text = value.ToString();
|
||||
traceId = string.IsNullOrWhiteSpace(text) ? null : text;
|
||||
}
|
||||
else if (name.StartsWith(NotifyQueueFields.AttributePrefix, StringComparison.Ordinal))
|
||||
{
|
||||
var key = name[NotifyQueueFields.AttributePrefix.Length..];
|
||||
attributes[key] = value.ToString();
|
||||
}
|
||||
}
|
||||
|
||||
if (payloadJson is null || enqueuedAtUnix is null)
|
||||
{
|
||||
return null;
|
||||
}
|
||||
|
||||
NotifyEvent notifyEvent;
|
||||
try
|
||||
{
|
||||
notifyEvent = NotifyCanonicalJsonSerializer.Deserialize<NotifyEvent>(payloadJson);
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
_logger.LogWarning(
|
||||
ex,
|
||||
"Failed to deserialize Notify event payload for stream {Stream} entry {EntryId}.",
|
||||
streamOptions.Stream,
|
||||
entry.Id.ToString());
|
||||
return null;
|
||||
}
|
||||
|
||||
var attributeView = attributes.Count == 0
|
||||
? EmptyReadOnlyDictionary<string, string>.Instance
|
||||
: new ReadOnlyDictionary<string, string>(attributes);
|
||||
|
||||
var message = new NotifyQueueEventMessage(
|
||||
notifyEvent,
|
||||
streamOptions.Stream,
|
||||
idempotencyKey: idempotency ?? notifyEvent.EventId.ToString("N"),
|
||||
partitionKey: partitionKey,
|
||||
traceId: traceId,
|
||||
attributes: attributeView);
|
||||
|
||||
var enqueuedAt = DateTimeOffset.FromUnixTimeMilliseconds(enqueuedAtUnix.Value);
|
||||
var leaseExpiresAt = now.Add(leaseDuration);
|
||||
|
||||
return new RedisNotifyEventLease(
|
||||
this,
|
||||
streamOptions,
|
||||
entry.Id.ToString(),
|
||||
message,
|
||||
attempt,
|
||||
consumer,
|
||||
enqueuedAt,
|
||||
leaseExpiresAt);
|
||||
}
|
||||
|
||||
private async Task AckPoisonAsync(
|
||||
IDatabase database,
|
||||
NotifyRedisEventStreamOptions streamOptions,
|
||||
RedisValue messageId)
|
||||
{
|
||||
await database.StreamAcknowledgeAsync(
|
||||
streamOptions.Stream,
|
||||
streamOptions.ConsumerGroup,
|
||||
new RedisValue[] { messageId })
|
||||
.ConfigureAwait(false);
|
||||
|
||||
await database.StreamDeleteAsync(
|
||||
streamOptions.Stream,
|
||||
new RedisValue[] { messageId })
|
||||
.ConfigureAwait(false);
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user