Defer instance metadata update

packages/backend/src/core/NoteCreateService.ts

@@ -60,6 +60,7 @@ import { UserBlockingService } from '@/core/UserBlockingService.js';
 import { isReply } from '@/misc/is-reply.js';
 import { trackPromise } from '@/misc/promise-tracker.js';
 import { IdentifiableError } from '@/misc/identifiable-error.js';
+import { CollapsedQueue } from '@/misc/collapsed-queue.js';
 
 type NotificationType = 'reply' | 'renote' | 'quote' | 'mention';
 
@@ -151,6 +152,7 @@ type Option = {
 @Injectable()
 export class NoteCreateService implements OnApplicationShutdown {
 	#shutdownController = new AbortController();
+	private updateNotesCountQueue: CollapsedQueue<MiNote['id'], number>;
 
 	constructor(
 		@Inject(DI.config)
@@ -218,7 +220,9 @@ export class NoteCreateService implements OnApplicationShutdown {
 		private instanceChart: InstanceChart,
 		private utilityService: UtilityService,
 		private userBlockingService: UserBlockingService,
-	) { }
+	) {
+		this.updateNotesCountQueue = new CollapsedQueue(60 * 1000 * 5, this.collapseNotesCount, this.performUpdateNotesCount);
+	}
 
 	@bindThis
 	public async create(user: {
@@ -516,7 +520,7 @@ export class NoteCreateService implements OnApplicationShutdown {
 		// Register host
 		if (this.userEntityService.isRemoteUser(user)) {
 			this.federatedInstanceService.fetch(user.host).then(async i => {
-				this.instancesRepository.increment({ id: i.id }, 'notesCount', 1);
+				this.updateNotesCountQueue.enqueue(i.id, 1);
 				if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
 					this.instanceChart.updateNote(i.host, note, true);
 				}
@@ -1035,6 +1039,16 @@ export class NoteCreateService implements OnApplicationShutdown {
 		return false;
 	}
 
+	@bindThis
+	private collapseNotesCount(oldValue: number, newValue: number) {
+		return oldValue + newValue;
+	}
+
+	@bindThis
+	private performUpdateNotesCount(id: MiNote['id'], incrBy: number) {
+		this.instancesRepository.increment({ id: id }, 'notesCount', incrBy);
+	}
+
 	@bindThis
 	public dispose(): void {
 		this.#shutdownController.abort();

packages/backend/src/misc/collapsed-queue.ts

@@ -0,0 +1,24 @@
+export class CollapsedQueue<K, V> {
+	private jobs: Map<K, V> = new Map();
+
+	constructor(
+		private timeout: number,
+		private collapse: (oldValue: V, newValue: V) => V,
+		private doJob: (key: K, value: V) => void,
+	) { }
+
+	enqueue(key: K, value: V) {
+		if (this.jobs.has(key)) {
+			const old = this.jobs.get(key)!;
+			const merged = this.collapse(old, value);
+			this.jobs.set(key, merged);
+		} else {
+			this.jobs.set(key, value);
+			setTimeout(() => {
+				const value = this.jobs.get(key)!;
+				this.jobs.delete(key);
+				this.doJob(key, value);
+			}, this.timeout);
+		}
+	}
+}

packages/backend/src/queue/processors/InboxProcessorService.ts

@@ -28,10 +28,18 @@ import { bindThis } from '@/decorators.js';
 import { IdentifiableError } from '@/misc/identifiable-error.js';
 import { QueueLoggerService } from '../QueueLoggerService.js';
 import type { InboxJobData } from '../types.js';
+import { CollapsedQueue } from "@/misc/collapsed-queue.js"
+import { MiNote } from '@/models/Note.js';
+
+type UpdateInstanceJob = {
+	latestRequestReceivedAt: Date,
+	shouldUnsuspend: boolean,
+};
 
 @Injectable()
 export class InboxProcessorService {
 	private logger: Logger;
+	private updateInstanceQueue: CollapsedQueue<MiNote['id'], UpdateInstanceJob>;
 
 	constructor(
 		private utilityService: UtilityService,
@@ -48,6 +56,7 @@ export class InboxProcessorService {
 		private queueLoggerService: QueueLoggerService,
 	) {
 		this.logger = this.queueLoggerService.logger.createSubLogger('inbox');
+		this.updateInstanceQueue = new CollapsedQueue(60 * 1000 * 5, this.collapseUpdateInstanceJobs, this.performUpdateInstance);
 	}
 
 	@bindThis
@@ -185,11 +194,9 @@ export class InboxProcessorService {
 
 		// Update stats
 		this.federatedInstanceService.fetch(authUser.user.host).then(i => {
-			this.federatedInstanceService.update(i.id, {
+			this.updateInstanceQueue.enqueue(i.id, {
 				latestRequestReceivedAt: new Date(),
-				isNotResponding: false,
-				// もしサーバーが死んでるために配信が止まっていた場合には自動的に復活させてあげる
-				suspensionState: i.suspensionState === 'autoSuspendedForNotResponding' ? 'none' : undefined,
+				shouldUnsuspend: job.suspensionState === 'autoSuspendedForNotResponding',
 			});
 
 			this.fetchInstanceMetadataService.fetchInstanceMetadata(i);
@@ -225,4 +232,26 @@ export class InboxProcessorService {
 		}
 		return 'ok';
 	}
+
+	@bindThis
+	public collapseUpdateInstanceJobs(oldJob: UpdateInstanceJob, newJob: UpdateInstanceJob) {
+		const latestRequestReceivedAt = oldJob.latestRequestReceivedAt < newJob.latestRequestReceivedAt
+			? newJob.latestRequestReceivedAt
+			: oldJob.latestRequestReceivedAt;
+		const shouldUnsuspend = oldJob.shouldUnsuspend || newJob.shouldUnsuspend;
+		return {
+			latestRequestReceivedAt,
+			shouldUnsuspend,
+		};
+	}
+
+	@bindThis
+	public performUpdateInstance(id: string, job: UpdateInstanceJob) {
+		this.federatedInstanceService.update(id, {
+			latestRequestReceivedAt: new Date(),
+			isNotResponding: false,
+			// もしサーバーが死んでるために配信が止まっていた場合には自動的に復活させてあげる
+			suspensionState: job.shouldUnsuspend ? 'none' : undefined,
+		});
+	}
 }