| | | 1 | | using Microsoft.Extensions.Hosting; |
| | | 2 | | using Microsoft.Extensions.Logging; |
| | | 3 | | using Microsoft.Extensions.Options; |
| | | 4 | | |
| | | 5 | | namespace AsyncResponse.Transports.SQS; |
| | | 6 | | |
| | | 7 | | internal abstract class SqsSubscriberService : BackgroundService |
| | | 8 | | { |
| | | 9 | | private readonly ISqsClient _client; |
| | | 10 | | |
| | | 11 | | protected SqsSubscriberService( |
| | | 12 | | IOptions<SqsAsyncResponseOptions> options, |
| | | 13 | | ISqsClient client, |
| | | 14 | | ILogger logger) |
| | | 15 | | { |
| | | 16 | | Options = options.Value; |
| | | 17 | | SqsOptionsValidator.ValidateCommon(Options); |
| | | 18 | | _client = client; |
| | | 19 | | Logger = logger; |
| | | 20 | | } |
| | | 21 | | |
| | | 22 | | protected SqsAsyncResponseOptions Options { get; } |
| | | 23 | | protected ILogger Logger { get; } |
| | | 24 | | |
| | | 25 | | /// <summary>Measures how long a delivery has been in flight; replaced by tests to reach the 12-hour ceiling.</summa |
| | | 26 | | internal TimeProvider Clock { get; set; } = TimeProvider.System; |
| | | 27 | | |
| | | 28 | | protected abstract string QueueName { get; } |
| | | 29 | | protected abstract SqsSubscriberOptions SubscriberOptions { get; } |
| | | 30 | | protected abstract SqsSubscriberRole SubscriberRole { get; } |
| | | 31 | | /// <summary>Handles the delivered message.</summary> |
| | | 32 | | protected abstract Task HandleMessageAsync(SqsTransportDelivery delivery, CancellationToken cancellationToken); |
| | | 33 | | |
| | | 34 | | /// <summary>Runs this background operation until cancellation is requested.</summary> |
| | | 35 | | /// <summary> |
| | | 36 | | /// Validates subscriber options here rather than at the top of <c>ExecuteAsync</c>: since |
| | | 37 | | /// Microsoft.Extensions.Hosting.Abstractions 10.0.10, <c>BackgroundService.StartAsync</c> no |
| | | 38 | | /// longer runs <c>ExecuteAsync</c> inline, so a throw there surfaces only through the host's |
| | | 39 | | /// background-exception handling — or never, when a fast stop discards the queued work — |
| | | 40 | | /// instead of failing host startup synchronously. |
| | | 41 | | /// </summary> |
| | | 42 | | public override Task StartAsync(CancellationToken cancellationToken) |
| | | 43 | | { |
| | | 44 | | _ = QueueName; // Resolving the name enforces its Required check at startup too. |
| | | 45 | | SqsMessageDispatcher.ValidateOptions(Options, SubscriberOptions, SubscriberRole); |
| | | 46 | | return base.StartAsync(cancellationToken); |
| | | 47 | | } |
| | | 48 | | |
| | | 49 | | protected override async Task ExecuteAsync(CancellationToken stoppingToken) |
| | | 50 | | { |
| | | 51 | | var queue = QueueName; |
| | | 52 | | |
| | | 53 | | // The dispatcher outlives the supervised attempts below. In ACK-after-enqueue mode it |
| | | 54 | | // holds work that was already DELETED at the broker, and disposing it runs the stop-time |
| | | 55 | | // drain — so scoped to one attempt, any receive fault (throttling, a network blip) on a |
| | | 56 | | // host that is NOT stopping paused consumption for the drain budget and then surfaced |
| | | 57 | | // the still-queued work as lapsed, work SQS can never redeliver. It captures nothing |
| | | 58 | | // per-attempt (deliveries carry their own settlement), so only host stop drains it. |
| | | 59 | | await using var dispatcher = SqsMessageDispatcher.Create( |
| | | 60 | | HandleMessageAsync, |
| | | 61 | | Options, |
| | | 62 | | SubscriberOptions, |
| | | 63 | | Logger, |
| | | 64 | | queue, |
| | | 65 | | SubscriberRole); |
| | | 66 | | |
| | | 67 | | await SubscriberSupervisor.RunAsync( |
| | | 68 | | ct => RunSubscriberAsync(queue, dispatcher, ct), |
| | | 69 | | stoppingToken, |
| | | 70 | | failures => AsyncResponseRetry.Backoff( |
| | | 71 | | failures, |
| | | 72 | | Options.SubscriberRetryBaseDelay, |
| | | 73 | | Options.SubscriberRetryMaxDelay), |
| | | 74 | | (ex, retryDelay) => Logger.LogWarning( |
| | | 75 | | ex, |
| | | 76 | | "SQS subscriber failed for queue {Queue} ({Role}); retrying in {RetryDelay}.", |
| | | 77 | | queue, |
| | | 78 | | SubscriberRole, |
| | | 79 | | retryDelay)).ConfigureAwait(false); |
| | | 80 | | } |
| | | 81 | | |
| | | 82 | | private async Task RunSubscriberAsync(string queue, SqsMessageDispatcher dispatcher, CancellationToken stoppingToken |
| | | 83 | | { |
| | | 84 | | // A queue configured by name resolves through GetQueueUrl; failures here (queue not yet |
| | | 85 | | // provisioned, endpoint still starting) surface to the retry loop above. |
| | | 86 | | var queueUrl = SqsQueueAddress.IsUrl(queue) |
| | | 87 | | ? queue |
| | | 88 | | : await _client.GetQueueUrlAsync(queue, stoppingToken).ConfigureAwait(false); |
| | | 89 | | |
| | | 90 | | Logger.LogInformation( |
| | | 91 | | "SQS subscriber started. Queue: {Queue}. Role: {Role}. AckMode: {AckMode}.", |
| | | 92 | | queue, |
| | | 93 | | SubscriberRole, |
| | | 94 | | SubscriberOptions.AckMode); |
| | | 95 | | |
| | | 96 | | while (!stoppingToken.IsCancellationRequested) |
| | | 97 | | { |
| | | 98 | | // In early-ACK mode, receiving while the background queue is saturated would burn the |
| | | 99 | | // queue's redrive policy (SQS counts every receive), so wait for free capacity and never |
| | | 100 | | // request more messages than the dispatcher can accept. |
| | | 101 | | await dispatcher.WaitForCapacityAsync(stoppingToken).ConfigureAwait(false); |
| | | 102 | | var maxMessages = Math.Min(Options.MaxMessagesPerReceive, dispatcher.FreeCapacity); |
| | | 103 | | |
| | | 104 | | // Stamped BEFORE the call: the 12-hour in-flight ceiling counts from the broker-side |
| | | 105 | | // receive, which happens somewhere inside the long poll, so measuring from here can |
| | | 106 | | // only over-estimate a delivery's age — the safe direction for the renewal clamp. |
| | | 107 | | var receiveStarted = Clock.GetTimestamp(); |
| | | 108 | | var deliveries = await _client.ReceiveMessagesAsync( |
| | | 109 | | new SqsReceiveRequest( |
| | | 110 | | queueUrl, |
| | | 111 | | maxMessages, |
| | | 112 | | Options.ReceiveWaitTime, |
| | | 113 | | SubscriberOptions.VisibilityTimeout), |
| | | 114 | | stoppingToken).ConfigureAwait(false); |
| | | 115 | | |
| | | 116 | | await DispatchBatchAsync(dispatcher, deliveries, queue, receiveStarted, stoppingToken).ConfigureAwait(false) |
| | | 117 | | } |
| | | 118 | | } |
| | | 119 | | |
| | | 120 | | private async Task DispatchBatchAsync( |
| | | 121 | | SqsMessageDispatcher dispatcher, |
| | | 122 | | IReadOnlyList<SqsTransportDelivery> deliveries, |
| | | 123 | | string queue, |
| | | 124 | | long receiveStarted, |
| | | 125 | | CancellationToken stoppingToken) |
| | | 126 | | { |
| | | 127 | | if (deliveries.Count == 0) |
| | | 128 | | return; |
| | | 129 | | |
| | | 130 | | if (SubscriberOptions.AckMode is not SqsAckMode.AckAfterHandlerCompletes |
| | | 131 | | || SubscriberOptions.VisibilityRenewalInterval is not { } renewalInterval |
| | | 132 | | || SubscriberOptions.VisibilityTimeout is not { } visibilityTimeout) |
| | | 133 | | { |
| | | 134 | | for (var index = 0; index < deliveries.Count; index++) |
| | | 135 | | { |
| | | 136 | | // The handler takes no token, so a stop cannot interrupt the message in hand — |
| | | 137 | | // but it must not START the rest of the batch: every fresh handler runs against |
| | | 138 | | // the host's shutdown budget and is killed mid-flight when that lapses. |
| | | 139 | | if (stoppingToken.IsCancellationRequested) |
| | | 140 | | { |
| | | 141 | | await HandBackUnstartedAsync(deliveries, index, progress: null, queue).ConfigureAwait(false); |
| | | 142 | | return; |
| | | 143 | | } |
| | | 144 | | |
| | | 145 | | await dispatcher.HandleAsync(deliveries[index], stoppingToken).ConfigureAwait(false); |
| | | 146 | | } |
| | | 147 | | |
| | | 148 | | return; |
| | | 149 | | } |
| | | 150 | | |
| | | 151 | | // The batch is processed serially, so a slow handler lets the visibility timeout of the later |
| | | 152 | | // (still unprocessed) messages lapse and a competing consumer processes them a second time. |
| | | 153 | | // While the batch is in flight, a heartbeat resets every unsettled message's invisibility to |
| | | 154 | | // the configured visibility timeout. |
| | | 155 | | var progress = new BatchProgress(deliveries.Count); |
| | | 156 | | // NOT linked to the stop token: the handler in flight when the host stops keeps running |
| | | 157 | | // (it takes no token), and ending its heartbeat at that moment let its visibility lapse |
| | | 158 | | // under a live handler — a competing consumer then ran the same job a second time on |
| | | 159 | | // every rolling deploy. The heartbeat ends when the batch loop does. |
| | | 160 | | using var renewalCancellation = new CancellationTokenSource(); |
| | | 161 | | var renewalTask = RenewVisibilityLoopAsync( |
| | | 162 | | deliveries, |
| | | 163 | | progress, |
| | | 164 | | renewalInterval, |
| | | 165 | | visibilityTimeout, |
| | | 166 | | queue, |
| | | 167 | | receiveStarted, |
| | | 168 | | renewalCancellation.Token); |
| | | 169 | | var handBack = Task.CompletedTask; |
| | | 170 | | try |
| | | 171 | | { |
| | | 172 | | for (var index = 0; index < deliveries.Count; index++) |
| | | 173 | | { |
| | | 174 | | // Same stop rule as the renewal-free path above. Without it the loop kept |
| | | 175 | | // starting the rest of the batch serially after the stop — with the heartbeat |
| | | 176 | | // already cancelled, so those handlers outlived their visibility. |
| | | 177 | | if (stoppingToken.IsCancellationRequested) |
| | | 178 | | { |
| | | 179 | | handBack = HandBackUnstartedAsync(deliveries, index, progress, queue); |
| | | 180 | | break; |
| | | 181 | | } |
| | | 182 | | |
| | | 183 | | var delivery = deliveries[index]; |
| | | 184 | | var batchIndex = index; |
| | | 185 | | // The dispatcher's failure path shortens visibility to RedeliveryDelay while the |
| | | 186 | | // heartbeat still counts the message as unsettled (MarkSettled runs only after |
| | | 187 | | // HandleAsync returns). Routing the dispatcher's visibility changes through a |
| | | 188 | | // suppression mark blocks future renewals; the per-message gate joins any renewal |
| | | 189 | | // already in flight before applying the shorter retry delay. |
| | | 190 | | var tracked = delivery with |
| | | 191 | | { |
| | | 192 | | ChangeVisibilityAsync = async (timeout, token) => |
| | | 193 | | { |
| | | 194 | | progress.SuppressRenewal(batchIndex); |
| | | 195 | | // A renewal may already be in flight. Its reply must settle before the |
| | | 196 | | // retry delay is applied, otherwise it can overwrite that shorter delay. |
| | | 197 | | var gate = progress.VisibilityGate(batchIndex); |
| | | 198 | | if (!await gate.WaitAsync(Options.ShutdownTimeout, stoppingToken).ConfigureAwait(false)) |
| | | 199 | | throw new TimeoutException("SQS visibility renewal did not settle before the retry-delay upd |
| | | 200 | | try |
| | | 201 | | { |
| | | 202 | | await delivery.ChangeVisibilityAsync(timeout, token).ConfigureAwait(false); |
| | | 203 | | } |
| | | 204 | | finally |
| | | 205 | | { |
| | | 206 | | gate.Release(); |
| | | 207 | | } |
| | | 208 | | } |
| | | 209 | | }; |
| | | 210 | | try |
| | | 211 | | { |
| | | 212 | | await dispatcher.HandleAsync(tracked, stoppingToken).ConfigureAwait(false); |
| | | 213 | | } |
| | | 214 | | finally |
| | | 215 | | { |
| | | 216 | | progress.MarkSettled(); |
| | | 217 | | } |
| | | 218 | | } |
| | | 219 | | } |
| | | 220 | | finally |
| | | 221 | | { |
| | | 222 | | renewalCancellation.Cancel(); |
| | | 223 | | try |
| | | 224 | | { |
| | | 225 | | // Cancellation exits the sweep between messages and reaches the in-flight |
| | | 226 | | // ChangeVisibility call through its token, so this join normally completes at |
| | | 227 | | // once. The bound covers the one case the token cannot end promptly — an SDK call |
| | | 228 | | // mid-retry against a degraded endpoint — which would otherwise stall the receive |
| | | 229 | | // loop (and, at shutdown, the host's stop budget) for the SDK retry budget. |
| | | 230 | | await renewalTask.WaitAsync(Options.ShutdownTimeout).ConfigureAwait(false); |
| | | 231 | | } |
| | | 232 | | catch (TimeoutException) |
| | | 233 | | { |
| | | 234 | | Logger.LogWarning( |
| | | 235 | | "SQS visibility renewal for {Queue} ({Role}) did not stop within the shutdown budget ({ShutdownTimeo |
| | | 236 | | queue, |
| | | 237 | | SubscriberRole, |
| | | 238 | | Options.ShutdownTimeout); |
| | | 239 | | } |
| | | 240 | | |
| | | 241 | | // Started before the join above and bounded by the same ShutdownTimeout, so the two |
| | | 242 | | // overlap: the stop path still spends one ShutdownTimeout here, not two. |
| | | 243 | | await handBack.ConfigureAwait(false); |
| | | 244 | | } |
| | | 245 | | } |
| | | 246 | | |
| | | 247 | | /// <summary> |
| | | 248 | | /// Makes the batch messages that were never started visible again at once. Left alone they |
| | | 249 | | /// stay invisible for the rest of their visibility timeout although nothing is processing |
| | | 250 | | /// them, stalling that work for as long on every rolling deploy; the receive already counted |
| | | 251 | | /// toward the redrive policy either way. Best-effort and bounded by |
| | | 252 | | /// <see cref="SqsAsyncResponseOptions.ShutdownTimeout"/>: a message that cannot be handed back |
| | | 253 | | /// simply reappears when its visibility timeout lapses. |
| | | 254 | | /// </summary> |
| | | 255 | | private async Task HandBackUnstartedAsync( |
| | | 256 | | IReadOnlyList<SqsTransportDelivery> deliveries, |
| | | 257 | | int firstUnstarted, |
| | | 258 | | BatchProgress? progress, |
| | | 259 | | string queue) |
| | | 260 | | { |
| | | 261 | | var budget = new CancellationTokenSource(Options.ShutdownTimeout); |
| | | 262 | | var releases = new Task[deliveries.Count - firstUnstarted]; |
| | | 263 | | for (var index = firstUnstarted; index < deliveries.Count; index++) |
| | | 264 | | releases[index - firstUnstarted] = ReleaseAsync(index); |
| | | 265 | | |
| | | 266 | | try |
| | | 267 | | { |
| | | 268 | | await Task.WhenAll(releases).WaitAsync(Options.ShutdownTimeout).ConfigureAwait(false); |
| | | 269 | | budget.Dispose(); |
| | | 270 | | } |
| | | 271 | | catch (TimeoutException) |
| | | 272 | | { |
| | | 273 | | // An SDK call mid-retry ignored the budget token. The source stays undisposed: the |
| | | 274 | | // abandoned calls still hold its token. |
| | | 275 | | Logger.LogWarning( |
| | | 276 | | "Handing unstarted SQS messages back to {Queue} ({Role}) did not finish within the shutdown budget ({Shu |
| | | 277 | | queue, |
| | | 278 | | SubscriberRole, |
| | | 279 | | Options.ShutdownTimeout); |
| | | 280 | | } |
| | | 281 | | |
| | | 282 | | async Task ReleaseAsync(int index) |
| | | 283 | | { |
| | | 284 | | var delivery = deliveries[index]; |
| | | 285 | | SemaphoreSlim? gate = null; |
| | | 286 | | try |
| | | 287 | | { |
| | | 288 | | if (progress is not null) |
| | | 289 | | { |
| | | 290 | | // Same ordering rule as the retry delay: a renewal already in flight for this |
| | | 291 | | // receipt must settle first, or its reply overwrites the release. |
| | | 292 | | progress.SuppressRenewal(index); |
| | | 293 | | await progress.VisibilityGate(index).WaitAsync(budget.Token).ConfigureAwait(false); |
| | | 294 | | gate = progress.VisibilityGate(index); |
| | | 295 | | } |
| | | 296 | | |
| | | 297 | | await delivery.ChangeVisibilityAsync(TimeSpan.Zero, budget.Token).ConfigureAwait(false); |
| | | 298 | | } |
| | | 299 | | catch (Exception ex) |
| | | 300 | | { |
| | | 301 | | Logger.LogWarning( |
| | | 302 | | ex, |
| | | 303 | | "Failed to hand unstarted SQS message {MessageId} back to {Queue} while stopping; it reappears when |
| | | 304 | | delivery.MessageId, |
| | | 305 | | queue); |
| | | 306 | | } |
| | | 307 | | finally |
| | | 308 | | { |
| | | 309 | | gate?.Release(); |
| | | 310 | | } |
| | | 311 | | } |
| | | 312 | | } |
| | | 313 | | |
| | | 314 | | /// <summary> |
| | | 315 | | /// The visibility a renewal may still request for a delivery received |
| | | 316 | | /// <paramref name="inFlight"/> ago, or <c>null</c> once nothing is left. SQS never keeps a |
| | | 317 | | /// message invisible for more than 12 hours from its receive and REJECTS — it does not |
| | | 318 | | /// truncate — a <c>ChangeMessageVisibility</c> that would cross that, so an unclamped renewal |
| | | 319 | | /// fails on every beat from <c>12 h − VisibilityTimeout</c> onward and forfeits the tail of |
| | | 320 | | /// the ceiling. Rounded down to whole seconds because the adapter rounds requests up. |
| | | 321 | | /// </summary> |
| | | 322 | | internal static TimeSpan? ClampRenewalToInFlightCeiling(TimeSpan visibilityTimeout, TimeSpan inFlight) |
| | | 323 | | { |
| | | 324 | | var remaining = TimeSpan.FromSeconds(Math.Floor((SqsWorkerTransport.SqsMaxInFlightDuration - inFlight).TotalSeco |
| | | 325 | | if (remaining <= TimeSpan.Zero) |
| | | 326 | | return null; |
| | | 327 | | |
| | | 328 | | return visibilityTimeout < remaining ? visibilityTimeout : remaining; |
| | | 329 | | } |
| | | 330 | | |
| | | 331 | | private async Task RenewVisibilityLoopAsync( |
| | | 332 | | IReadOnlyList<SqsTransportDelivery> deliveries, |
| | | 333 | | BatchProgress progress, |
| | | 334 | | TimeSpan renewalInterval, |
| | | 335 | | TimeSpan visibilityTimeout, |
| | | 336 | | string queue, |
| | | 337 | | long receiveStarted, |
| | | 338 | | CancellationToken cancellationToken) |
| | | 339 | | { |
| | | 340 | | try |
| | | 341 | | { |
| | | 342 | | while (true) |
| | | 343 | | { |
| | | 344 | | await Task.Delay(renewalInterval, cancellationToken).ConfigureAwait(false); |
| | | 345 | | |
| | | 346 | | // Renew from the first unsettled message onward: that covers the message currently in |
| | | 347 | | // the handler plus everything still waiting its turn. Two settle paths race this |
| | | 348 | | // sweep, and only one of them is harmless. A handled message was deleted, so a late |
| | | 349 | | // renewal merely fails and is logged — SQS redelivery keeps at-least-once intact. A |
| | | 350 | | // failed message was NOT deleted (its receipt handle stays live) and already carries |
| | | 351 | | // the failure path's shortened RedeliveryDelay, so a late renewal here would SUCCEED |
| | | 352 | | // and stretch that fast retry back out to the full visibility timeout — the |
| | | 353 | | // suppression mark and the per-message re-read of the settled prefix keep the sweep |
| | | 354 | | // away from it. |
| | | 355 | | for (var i = progress.SettledCount; i < deliveries.Count; i++) |
| | | 356 | | { |
| | | 357 | | // The batch finished or the subscriber is stopping: exit quietly between |
| | | 358 | | // messages instead of spending up to a full SDK retry budget on each remaining |
| | | 359 | | // renew (ASB-twin parity). |
| | | 360 | | if (cancellationToken.IsCancellationRequested) |
| | | 361 | | return; |
| | | 362 | | |
| | | 363 | | if (i < progress.SettledCount || progress.IsRenewalSuppressed(i)) |
| | | 364 | | continue; |
| | | 365 | | |
| | | 366 | | var delivery = deliveries[i]; |
| | | 367 | | try |
| | | 368 | | { |
| | | 369 | | var gate = progress.VisibilityGate(i); |
| | | 370 | | await gate.WaitAsync(cancellationToken).ConfigureAwait(false); |
| | | 371 | | try |
| | | 372 | | { |
| | | 373 | | if (i < progress.SettledCount || progress.IsRenewalSuppressed(i)) |
| | | 374 | | continue; |
| | | 375 | | |
| | | 376 | | var extension = ClampRenewalToInFlightCeiling(visibilityTimeout, Clock.GetElapsedTime(receiv |
| | | 377 | | if (extension is { } clamped) |
| | | 378 | | await delivery.ChangeVisibilityAsync(clamped, cancellationToken).ConfigureAwait(false); |
| | | 379 | | |
| | | 380 | | if (extension != visibilityTimeout) |
| | | 381 | | { |
| | | 382 | | // The ceiling, not a renewal fault: nothing can extend this |
| | | 383 | | // delivery any further, so say so once and stop asking instead of |
| | | 384 | | // logging a rejected renewal on every remaining beat. |
| | | 385 | | progress.SuppressRenewal(i); |
| | | 386 | | Logger.LogWarning( |
| | | 387 | | "SQS message {MessageId} on {Queue} has reached the 12-hour SQS in-flight ceiling; i |
| | | 388 | | delivery.MessageId, |
| | | 389 | | queue); |
| | | 390 | | } |
| | | 391 | | } |
| | | 392 | | finally |
| | | 393 | | { |
| | | 394 | | gate.Release(); |
| | | 395 | | } |
| | | 396 | | } |
| | | 397 | | catch (Exception ex) when (ex is not OperationCanceledException || !cancellationToken.IsCancellation |
| | | 398 | | { |
| | | 399 | | // Only OUR token ends the sweep. The AWS SDK surfaces its own client-side |
| | | 400 | | // HTTP timeout as TaskCanceledException with the caller's token untouched, |
| | | 401 | | // and excluding every OperationCanceledException let that escape to the |
| | | 402 | | // outer catch — whose body is just a comment — silently ending renewal for |
| | | 403 | | // the whole remaining batch. Messages 3..N then went visible mid-processing |
| | | 404 | | // and a peer re-ran them: systematic duplicate execution with no log line. |
| | | 405 | | // Same idiom the durable-flow start ladder and the DB channel already use. |
| | | 406 | | Logger.LogWarning( |
| | | 407 | | ex, |
| | | 408 | | "Failed to renew visibility of SQS message {MessageId} on {Queue}; it may redeliver while st |
| | | 409 | | delivery.MessageId, |
| | | 410 | | queue); |
| | | 411 | | } |
| | | 412 | | } |
| | | 413 | | } |
| | | 414 | | } |
| | | 415 | | catch (OperationCanceledException) |
| | | 416 | | { |
| | | 417 | | // The batch finished or the subscriber is stopping. |
| | | 418 | | } |
| | | 419 | | } |
| | | 420 | | |
| | | 421 | | private sealed class BatchProgress |
| | | 422 | | { |
| | | 423 | | // Gates are per message: a stuck renewal for one receipt cannot block another receipt's |
| | | 424 | | // retry. Do not dispose gates while an abandoned SDK call may still release one. |
| | | 425 | | private readonly bool[] _renewalSuppressed; |
| | | 426 | | private readonly SemaphoreSlim[] _visibilityGates; |
| | | 427 | | private int _settledCount; |
| | | 428 | | |
| | | 429 | | public BatchProgress(int batchSize) |
| | | 430 | | { |
| | | 431 | | _renewalSuppressed = new bool[batchSize]; |
| | | 432 | | _visibilityGates = Enumerable.Range(0, batchSize).Select(_ => new SemaphoreSlim(1, 1)).ToArray(); |
| | | 433 | | } |
| | | 434 | | |
| | | 435 | | public SemaphoreSlim VisibilityGate(int index) => _visibilityGates[index]; |
| | | 436 | | |
| | | 437 | | public int SettledCount => Volatile.Read(ref _settledCount); |
| | | 438 | | |
| | | 439 | | public void MarkSettled() => Interlocked.Increment(ref _settledCount); |
| | | 440 | | |
| | | 441 | | /// <summary>Marks the message at <paramref name="index"/> as owning its own visibility; the renewal sweep must |
| | | 442 | | public void SuppressRenewal(int index) => Volatile.Write(ref _renewalSuppressed[index], true); |
| | | 443 | | |
| | | 444 | | public bool IsRenewalSuppressed(int index) => Volatile.Read(ref _renewalSuppressed[index]); |
| | | 445 | | } |
| | | 446 | | } |
| | | 447 | | |
| | | 448 | | internal sealed class SqsWorkerSubscriber : SqsSubscriberService |
| | | 449 | | { |
| | | 450 | | private readonly IAsyncResponseIngress _ingress; |
| | | 451 | | |
| | | 452 | | /// <summary>Creates a worker subscriber for the configured SQS worker queue.</summary> |
| | | 453 | | public SqsWorkerSubscriber( |
| | | 454 | | IOptions<SqsAsyncResponseOptions> options, |
| | | 455 | | ISqsClient client, |
| | | 456 | | IAsyncResponseIngress ingress, |
| | | 457 | | ILogger<SqsWorkerSubscriber> logger) |
| | | 458 | | : base(options, client, logger) |
| | | 459 | | { |
| | | 460 | | _ingress = ingress; |
| | | 461 | | } |
| | | 462 | | |
| | | 463 | | protected override string QueueName |
| | | 464 | | => SqsOptionsValidator.Required(Options.WorkerQueue, nameof(Options.WorkerQueue)); |
| | | 465 | | |
| | | 466 | | protected override SqsSubscriberOptions SubscriberOptions => Options.WorkerSubscriber; |
| | | 467 | | protected override SqsSubscriberRole SubscriberRole => SqsSubscriberRole.Worker; |
| | | 468 | | |
| | | 469 | | /// <summary>Handles the delivered message.</summary> |
| | | 470 | | protected override Task HandleMessageAsync(SqsTransportDelivery delivery, CancellationToken cancellationToken) |
| | | 471 | | => _ingress.HandleWorkerMessageAsync(delivery.Body); |
| | | 472 | | } |
| | | 473 | | |
| | | 474 | | internal sealed class SqsResponseIngressSubscriber : SqsSubscriberService |
| | | 475 | | { |
| | | 476 | | private readonly IAsyncResponseIngress _ingress; |
| | | 477 | | |
| | | 478 | | /// <summary>Creates a response subscriber for the configured SQS response queue.</summary> |
| | | 479 | | public SqsResponseIngressSubscriber( |
| | | 480 | | IOptions<SqsAsyncResponseOptions> options, |
| | | 481 | | ISqsClient client, |
| | | 482 | | IAsyncResponseIngress ingress, |
| | | 483 | | ILogger<SqsResponseIngressSubscriber> logger) |
| | 198 | 484 | | : base(options, client, logger) |
| | | 485 | | { |
| | 198 | 486 | | _ingress = ingress; |
| | 198 | 487 | | } |
| | | 488 | | |
| | | 489 | | protected override string QueueName |
| | 388 | 490 | | => SqsOptionsValidator.Required(Options.ResponseQueue, nameof(Options.ResponseQueue)); |
| | | 491 | | |
| | 789 | 492 | | protected override SqsSubscriberOptions SubscriberOptions => Options.ResponseSubscriber; |
| | 582 | 493 | | protected override SqsSubscriberRole SubscriberRole => SqsSubscriberRole.ResponseIngress; |
| | | 494 | | |
| | | 495 | | /// <summary>Handles the delivered message.</summary> |
| | | 496 | | protected override Task HandleMessageAsync(SqsTransportDelivery delivery, CancellationToken cancellationToken) |
| | | 497 | | { |
| | 2 | 498 | | var correlationId = !_ingress.IsOverInboundBudget(delivery.Body) |
| | 2 | 499 | | ? SqsCorrelationIdExtractor.Extract(delivery, delivery.Body, Options) |
| | 2 | 500 | | : null; |
| | 2 | 501 | | return _ingress.HandleResponseMessageAsync(delivery.Body, correlationId); |
| | | 502 | | } |
| | | 503 | | } |