refactoring

Resolve #7779

25 files changed, 1690 insertions, 0 deletions

diff --git a/packages/backend/src/queue/get-job-info.ts b/packages/backend/src/queue/get-job-info.ts
new file mode 100644
index 0000000000..f601ae62d0
--- /dev/null
+++ b/packages/backend/src/queue/get-job-info.ts
@@ -0,0 +1,15 @@
+import * as Bull from 'bull';
+
+export function getJobInfo(job: Bull.Job, increment = false) {
+	const age = Date.now() - job.timestamp;
+
+	const formated = age > 60000 ? `${Math.floor(age / 1000 / 60)}m`
+		: age > 10000 ? `${Math.floor(age / 1000)}s`
+		: `${age}ms`;
+
+	// onActiveとかonCompletedのattemptsMadeがなぜか0始まりなのでインクリメントする
+	const currentAttempts = job.attemptsMade + (increment ? 1 : 0);
+	const maxAttempts = job.opts ? job.opts.attempts : 0;
+
+	return `id=${job.id} attempts=${currentAttempts}/${maxAttempts} age=${formated}`;
+}
diff --git a/packages/backend/src/queue/index.ts b/packages/backend/src/queue/index.ts
new file mode 100644
index 0000000000..37eb809604
--- /dev/null
+++ b/packages/backend/src/queue/index.ts
@@ -0,0 +1,255 @@
+import * as httpSignature from 'http-signature';
+
+import config from '@/config/index';
+import { envOption } from '../env';
+
+import processDeliver from './processors/deliver';
+import processInbox from './processors/inbox';
+import processDb from './processors/db/index';
+import procesObjectStorage from './processors/object-storage/index';
+import { queueLogger } from './logger';
+import { DriveFile } from '@/models/entities/drive-file';
+import { getJobInfo } from './get-job-info';
+import { systemQueue, dbQueue, deliverQueue, inboxQueue, objectStorageQueue } from './queues';
+import { ThinUser } from './types';
+import { IActivity } from '@/remote/activitypub/type';
+
+function renderError(e: Error): any {
+	return {
+		stack: e?.stack,
+		message: e?.message,
+		name: e?.name
+	};
+}
+
+const systemLogger = queueLogger.createSubLogger('system');
+const deliverLogger = queueLogger.createSubLogger('deliver');
+const inboxLogger = queueLogger.createSubLogger('inbox');
+const dbLogger = queueLogger.createSubLogger('db');
+const objectStorageLogger = queueLogger.createSubLogger('objectStorage');
+
+systemQueue
+	.on('waiting', (jobId) => systemLogger.debug(`waiting id=${jobId}`))
+	.on('active', (job) => systemLogger.debug(`active id=${job.id}`))
+	.on('completed', (job, result) => systemLogger.debug(`completed(${result}) id=${job.id}`))
+	.on('failed', (job, err) => systemLogger.warn(`failed(${err}) id=${job.id}`, { job, e: renderError(err) }))
+	.on('error', (job: any, err: Error) => systemLogger.error(`error ${err}`, { job, e: renderError(err) }))
+	.on('stalled', (job) => systemLogger.warn(`stalled id=${job.id}`));
+
+deliverQueue
+	.on('waiting', (jobId) => deliverLogger.debug(`waiting id=${jobId}`))
+	.on('active', (job) => deliverLogger.debug(`active ${getJobInfo(job, true)} to=${job.data.to}`))
+	.on('completed', (job, result) => deliverLogger.debug(`completed(${result}) ${getJobInfo(job, true)} to=${job.data.to}`))
+	.on('failed', (job, err) => deliverLogger.warn(`failed(${err}) ${getJobInfo(job)} to=${job.data.to}`))
+	.on('error', (job: any, err: Error) => deliverLogger.error(`error ${err}`, { job, e: renderError(err) }))
+	.on('stalled', (job) => deliverLogger.warn(`stalled ${getJobInfo(job)} to=${job.data.to}`));
+
+inboxQueue
+	.on('waiting', (jobId) => inboxLogger.debug(`waiting id=${jobId}`))
+	.on('active', (job) => inboxLogger.debug(`active ${getJobInfo(job, true)}`))
+	.on('completed', (job, result) => inboxLogger.debug(`completed(${result}) ${getJobInfo(job, true)}`))
+	.on('failed', (job, err) => inboxLogger.warn(`failed(${err}) ${getJobInfo(job)} activity=${job.data.activity ? job.data.activity.id : 'none'}`, { job, e: renderError(err) }))
+	.on('error', (job: any, err: Error) => inboxLogger.error(`error ${err}`, { job, e: renderError(err) }))
+	.on('stalled', (job) => inboxLogger.warn(`stalled ${getJobInfo(job)} activity=${job.data.activity ? job.data.activity.id : 'none'}`));
+
+dbQueue
+	.on('waiting', (jobId) => dbLogger.debug(`waiting id=${jobId}`))
+	.on('active', (job) => dbLogger.debug(`active id=${job.id}`))
+	.on('completed', (job, result) => dbLogger.debug(`completed(${result}) id=${job.id}`))
+	.on('failed', (job, err) => dbLogger.warn(`failed(${err}) id=${job.id}`, { job, e: renderError(err) }))
+	.on('error', (job: any, err: Error) => dbLogger.error(`error ${err}`, { job, e: renderError(err) }))
+	.on('stalled', (job) => dbLogger.warn(`stalled id=${job.id}`));
+
+objectStorageQueue
+	.on('waiting', (jobId) => objectStorageLogger.debug(`waiting id=${jobId}`))
+	.on('active', (job) => objectStorageLogger.debug(`active id=${job.id}`))
+	.on('completed', (job, result) => objectStorageLogger.debug(`completed(${result}) id=${job.id}`))
+	.on('failed', (job, err) => objectStorageLogger.warn(`failed(${err}) id=${job.id}`, { job, e: renderError(err) }))
+	.on('error', (job: any, err: Error) => objectStorageLogger.error(`error ${err}`, { job, e: renderError(err) }))
+	.on('stalled', (job) => objectStorageLogger.warn(`stalled id=${job.id}`));
+
+export function deliver(user: ThinUser, content: unknown, to: string | null) {
+	if (content == null) return null;
+	if (to == null) return null;
+
+	const data = {
+		user: {
+			id: user.id
+		},
+		content,
+		to
+	};
+
+	return deliverQueue.add(data, {
+		attempts: config.deliverJobMaxAttempts || 12,
+		timeout: 1 * 60 * 1000,	// 1min
+		backoff: {
+			type: 'apBackoff'
+		},
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function inbox(activity: IActivity, signature: httpSignature.IParsedSignature) {
+	const data = {
+		activity: activity,
+		signature
+	};
+
+	return inboxQueue.add(data, {
+		attempts: config.inboxJobMaxAttempts || 8,
+		timeout: 5 * 60 * 1000,	// 5min
+		backoff: {
+			type: 'apBackoff'
+		},
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function createDeleteDriveFilesJob(user: ThinUser) {
+	return dbQueue.add('deleteDriveFiles', {
+		user: user
+	}, {
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function createExportNotesJob(user: ThinUser) {
+	return dbQueue.add('exportNotes', {
+		user: user
+	}, {
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function createExportFollowingJob(user: ThinUser) {
+	return dbQueue.add('exportFollowing', {
+		user: user
+	}, {
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function createExportMuteJob(user: ThinUser) {
+	return dbQueue.add('exportMute', {
+		user: user
+	}, {
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function createExportBlockingJob(user: ThinUser) {
+	return dbQueue.add('exportBlocking', {
+		user: user
+	}, {
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function createExportUserListsJob(user: ThinUser) {
+	return dbQueue.add('exportUserLists', {
+		user: user
+	}, {
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function createImportFollowingJob(user: ThinUser, fileId: DriveFile['id']) {
+	return dbQueue.add('importFollowing', {
+		user: user,
+		fileId: fileId
+	}, {
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function createImportMutingJob(user: ThinUser, fileId: DriveFile['id']) {
+	return dbQueue.add('importMuting', {
+		user: user,
+		fileId: fileId
+	}, {
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function createImportBlockingJob(user: ThinUser, fileId: DriveFile['id']) {
+	return dbQueue.add('importBlocking', {
+		user: user,
+		fileId: fileId
+	}, {
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function createImportUserListsJob(user: ThinUser, fileId: DriveFile['id']) {
+	return dbQueue.add('importUserLists', {
+		user: user,
+		fileId: fileId
+	}, {
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function createDeleteAccountJob(user: ThinUser, opts: { soft?: boolean; } = {}) {
+	return dbQueue.add('deleteAccount', {
+		user: user,
+		soft: opts.soft
+	}, {
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function createDeleteObjectStorageFileJob(key: string) {
+	return objectStorageQueue.add('deleteFile', {
+		key: key
+	}, {
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export function createCleanRemoteFilesJob() {
+	return objectStorageQueue.add('cleanRemoteFiles', {}, {
+		removeOnComplete: true,
+		removeOnFail: true
+	});
+}
+
+export default function() {
+	if (envOption.onlyServer) return;
+
+	deliverQueue.process(config.deliverJobConcurrency || 128, processDeliver);
+	inboxQueue.process(config.inboxJobConcurrency || 16, processInbox);
+	processDb(dbQueue);
+	procesObjectStorage(objectStorageQueue);
+
+	systemQueue.add('resyncCharts', {
+	}, {
+		repeat: { cron: '0 0 * * *' }
+	});
+}
+
+export function destroy() {
+	deliverQueue.once('cleaned', (jobs, status) => {
+		deliverLogger.succ(`Cleaned ${jobs.length} ${status} jobs`);
+	});
+	deliverQueue.clean(0, 'delayed');
+
+	inboxQueue.once('cleaned', (jobs, status) => {
+		inboxLogger.succ(`Cleaned ${jobs.length} ${status} jobs`);
+	});
+	inboxQueue.clean(0, 'delayed');
+}
diff --git a/packages/backend/src/queue/initialize.ts b/packages/backend/src/queue/initialize.ts
new file mode 100644
index 0000000000..31102a3ed2
--- /dev/null
+++ b/packages/backend/src/queue/initialize.ts
@@ -0,0 +1,33 @@
+import * as Bull from 'bull';
+import config from '@/config/index';
+
+export function initialize<T>(name: string, limitPerSec = -1) {
+	return new Bull<T>(name, {
+		redis: {
+			port: config.redis.port,
+			host: config.redis.host,
+			password: config.redis.pass,
+			db: config.redis.db || 0,
+		},
+		prefix: config.redis.prefix ? `${config.redis.prefix}:queue` : 'queue',
+		limiter: limitPerSec > 0 ? {
+			max: limitPerSec,
+			duration: 1000
+		} : undefined,
+		settings: {
+			backoffStrategies: {
+				apBackoff
+			}
+		}
+	});
+}
+
+// ref. https://github.com/misskey-dev/misskey/pull/7635#issue-971097019
+function apBackoff(attemptsMade: number, err: Error) {
+	const baseDelay = 60 * 1000;	// 1min
+	const maxBackoff = 8 * 60 * 60 * 1000;	// 8hours
+	let backoff = (Math.pow(2, attemptsMade) - 1) * baseDelay;
+	backoff = Math.min(backoff, maxBackoff);
+	backoff += Math.round(backoff * Math.random() * 0.2);
+	return backoff;
+}
diff --git a/packages/backend/src/queue/logger.ts b/packages/backend/src/queue/logger.ts
new file mode 100644
index 0000000000..f789b9d079
--- /dev/null
+++ b/packages/backend/src/queue/logger.ts
@@ -0,0 +1,3 @@
+import Logger from '@/services/logger';
+
+export const queueLogger = new Logger('queue', 'orange');
diff --git a/packages/backend/src/queue/processors/db/delete-account.ts b/packages/backend/src/queue/processors/db/delete-account.ts
new file mode 100644
index 0000000000..e54f38e35e
--- /dev/null
+++ b/packages/backend/src/queue/processors/db/delete-account.ts
@@ -0,0 +1,94 @@
+import * as Bull from 'bull';
+import { queueLogger } from '../../logger';
+import { DriveFiles, Notes, UserProfiles, Users } from '@/models/index';
+import { DbUserDeleteJobData } from '@/queue/types';
+import { Note } from '@/models/entities/note';
+import { DriveFile } from '@/models/entities/drive-file';
+import { MoreThan } from 'typeorm';
+import { deleteFileSync } from '@/services/drive/delete-file';
+import { sendEmail } from '@/services/send-email';
+
+const logger = queueLogger.createSubLogger('delete-account');
+
+export async function deleteAccount(job: Bull.Job<DbUserDeleteJobData>): Promise<string | void> {
+	logger.info(`Deleting account of ${job.data.user.id} ...`);
+
+	const user = await Users.findOne(job.data.user.id);
+	if (user == null) {
+		return;
+	}
+
+	{ // Delete notes
+		let cursor: Note['id'] | null = null;
+
+		while (true) {
+			const notes = await Notes.find({
+				where: {
+					userId: user.id,
+					...(cursor ? { id: MoreThan(cursor) } : {})
+				},
+				take: 100,
+				order: {
+					id: 1
+				}
+			});
+
+			if (notes.length === 0) {
+				break;
+			}
+
+			cursor = notes[notes.length - 1].id;
+
+			await Notes.delete(notes.map(note => note.id));
+		}
+
+		logger.succ(`All of notes deleted`);
+	}
+
+	{ // Delete files
+		let cursor: DriveFile['id'] | null = null;
+
+		while (true) {
+			const files = await DriveFiles.find({
+				where: {
+					userId: user.id,
+					...(cursor ? { id: MoreThan(cursor) } : {})
+				},
+				take: 10,
+				order: {
+					id: 1
+				}
+			});
+
+			if (files.length === 0) {
+				break;
+			}
+
+			cursor = files[files.length - 1].id;
+
+			for (const file of files) {
+				await deleteFileSync(file);
+			}
+		}
+
+		logger.succ(`All of files deleted`);
+	}
+
+	{ // Send email notification
+		const profile = await UserProfiles.findOneOrFail(user.id);
+		if (profile.email && profile.emailVerified) {
+			sendEmail(profile.email, 'Account deleted',
+				`Your account has been deleted.`,
+				`Your account has been deleted.`);
+		}
+	}
+
+	// soft指定されている場合は物理削除しない
+	if (job.data.soft) {
+		// nop
+	} else {
+		await Users.delete(job.data.user.id);
+	}
+
+	return 'Account deleted';
+}
diff --git a/packages/backend/src/queue/processors/db/delete-drive-files.ts b/packages/backend/src/queue/processors/db/delete-drive-files.ts
new file mode 100644
index 0000000000..8a28468b0d
--- /dev/null
+++ b/packages/backend/src/queue/processors/db/delete-drive-files.ts
@@ -0,0 +1,56 @@
+import * as Bull from 'bull';
+
+import { queueLogger } from '../../logger';
+import { deleteFileSync } from '@/services/drive/delete-file';
+import { Users, DriveFiles } from '@/models/index';
+import { MoreThan } from 'typeorm';
+import { DbUserJobData } from '@/queue/types';
+
+const logger = queueLogger.createSubLogger('delete-drive-files');
+
+export async function deleteDriveFiles(job: Bull.Job<DbUserJobData>, done: any): Promise<void> {
+	logger.info(`Deleting drive files of ${job.data.user.id} ...`);
+
+	const user = await Users.findOne(job.data.user.id);
+	if (user == null) {
+		done();
+		return;
+	}
+
+	let deletedCount = 0;
+	let cursor: any = null;
+
+	while (true) {
+		const files = await DriveFiles.find({
+			where: {
+				userId: user.id,
+				...(cursor ? { id: MoreThan(cursor) } : {})
+			},
+			take: 100,
+			order: {
+				id: 1
+			}
+		});
+
+		if (files.length === 0) {
+			job.progress(100);
+			break;
+		}
+
+		cursor = files[files.length - 1].id;
+
+		for (const file of files) {
+			await deleteFileSync(file);
+			deletedCount++;
+		}
+
+		const total = await DriveFiles.count({
+			userId: user.id,
+		});
+
+		job.progress(deletedCount / total);
+	}
+
+	logger.succ(`All drive files (${deletedCount}) of ${user.id} has been deleted.`);
+	done();
+}
diff --git a/packages/backend/src/queue/processors/db/export-blocking.ts b/packages/backend/src/queue/processors/db/export-blocking.ts
new file mode 100644
index 0000000000..8b8aa259d4
--- /dev/null
+++ b/packages/backend/src/queue/processors/db/export-blocking.ts
@@ -0,0 +1,94 @@
+import * as Bull from 'bull';
+import * as tmp from 'tmp';
+import * as fs from 'fs';
+
+import { queueLogger } from '../../logger';
+import addFile from '@/services/drive/add-file';
+import * as dateFormat from 'dateformat';
+import { getFullApAccount } from '@/misc/convert-host';
+import { Users, Blockings } from '@/models/index';
+import { MoreThan } from 'typeorm';
+import { DbUserJobData } from '@/queue/types';
+
+const logger = queueLogger.createSubLogger('export-blocking');
+
+export async function exportBlocking(job: Bull.Job<DbUserJobData>, done: any): Promise<void> {
+	logger.info(`Exporting blocking of ${job.data.user.id} ...`);
+
+	const user = await Users.findOne(job.data.user.id);
+	if (user == null) {
+		done();
+		return;
+	}
+
+	// Create temp file
+	const [path, cleanup] = await new Promise<[string, any]>((res, rej) => {
+		tmp.file((e, path, fd, cleanup) => {
+			if (e) return rej(e);
+			res([path, cleanup]);
+		});
+	});
+
+	logger.info(`Temp file is ${path}`);
+
+	const stream = fs.createWriteStream(path, { flags: 'a' });
+
+	let exportedCount = 0;
+	let cursor: any = null;
+
+	while (true) {
+		const blockings = await Blockings.find({
+			where: {
+				blockerId: user.id,
+				...(cursor ? { id: MoreThan(cursor) } : {})
+			},
+			take: 100,
+			order: {
+				id: 1
+			}
+		});
+
+		if (blockings.length === 0) {
+			job.progress(100);
+			break;
+		}
+
+		cursor = blockings[blockings.length - 1].id;
+
+		for (const block of blockings) {
+			const u = await Users.findOne({ id: block.blockeeId });
+			if (u == null) {
+				exportedCount++; continue;
+			}
+
+			const content = getFullApAccount(u.username, u.host);
+			await new Promise<void>((res, rej) => {
+				stream.write(content + '\n', err => {
+					if (err) {
+						logger.error(err);
+						rej(err);
+					} else {
+						res();
+					}
+				});
+			});
+			exportedCount++;
+		}
+
+		const total = await Blockings.count({
+			blockerId: user.id,
+		});
+
+		job.progress(exportedCount / total);
+	}
+
+	stream.end();
+	logger.succ(`Exported to: ${path}`);
+
+	const fileName = 'blocking-' + dateFormat(new Date(), 'yyyy-mm-dd-HH-MM-ss') + '.csv';
+	const driveFile = await addFile(user, path, fileName, null, null, true);
+
+	logger.succ(`Exported to: ${driveFile.id}`);
+	cleanup();
+	done();
+}
diff --git a/packages/backend/src/queue/processors/db/export-following.ts b/packages/backend/src/queue/processors/db/export-following.ts
new file mode 100644
index 0000000000..a0ecf5f560
--- /dev/null
+++ b/packages/backend/src/queue/processors/db/export-following.ts
@@ -0,0 +1,94 @@
+import * as Bull from 'bull';
+import * as tmp from 'tmp';
+import * as fs from 'fs';
+
+import { queueLogger } from '../../logger';
+import addFile from '@/services/drive/add-file';
+import * as dateFormat from 'dateformat';
+import { getFullApAccount } from '@/misc/convert-host';
+import { Users, Followings } from '@/models/index';
+import { MoreThan } from 'typeorm';
+import { DbUserJobData } from '@/queue/types';
+
+const logger = queueLogger.createSubLogger('export-following');
+
+export async function exportFollowing(job: Bull.Job<DbUserJobData>, done: any): Promise<void> {
+	logger.info(`Exporting following of ${job.data.user.id} ...`);
+
+	const user = await Users.findOne(job.data.user.id);
+	if (user == null) {
+		done();
+		return;
+	}
+
+	// Create temp file
+	const [path, cleanup] = await new Promise<[string, any]>((res, rej) => {
+		tmp.file((e, path, fd, cleanup) => {
+			if (e) return rej(e);
+			res([path, cleanup]);
+		});
+	});
+
+	logger.info(`Temp file is ${path}`);
+
+	const stream = fs.createWriteStream(path, { flags: 'a' });
+
+	let exportedCount = 0;
+	let cursor: any = null;
+
+	while (true) {
+		const followings = await Followings.find({
+			where: {
+				followerId: user.id,
+				...(cursor ? { id: MoreThan(cursor) } : {})
+			},
+			take: 100,
+			order: {
+				id: 1
+			}
+		});
+
+		if (followings.length === 0) {
+			job.progress(100);
+			break;
+		}
+
+		cursor = followings[followings.length - 1].id;
+
+		for (const following of followings) {
+			const u = await Users.findOne({ id: following.followeeId });
+			if (u == null) {
+				exportedCount++; continue;
+			}
+
+			const content = getFullApAccount(u.username, u.host);
+			await new Promise<void>((res, rej) => {
+				stream.write(content + '\n', err => {
+					if (err) {
+						logger.error(err);
+						rej(err);
+					} else {
+						res();
+					}
+				});
+			});
+			exportedCount++;
+		}
+
+		const total = await Followings.count({
+			followerId: user.id,
+		});
+
+		job.progress(exportedCount / total);
+	}
+
+	stream.end();
+	logger.succ(`Exported to: ${path}`);
+
+	const fileName = 'following-' + dateFormat(new Date(), 'yyyy-mm-dd-HH-MM-ss') + '.csv';
+	const driveFile = await addFile(user, path, fileName, null, null, true);
+
+	logger.succ(`Exported to: ${driveFile.id}`);
+	cleanup();
+	done();
+}
diff --git a/packages/backend/src/queue/processors/db/export-mute.ts b/packages/backend/src/queue/processors/db/export-mute.ts
new file mode 100644
index 0000000000..d5976f7d56
--- /dev/null
+++ b/packages/backend/src/queue/processors/db/export-mute.ts
@@ -0,0 +1,94 @@
+import * as Bull from 'bull';
+import * as tmp from 'tmp';
+import * as fs from 'fs';
+
+import { queueLogger } from '../../logger';
+import addFile from '@/services/drive/add-file';
+import * as dateFormat from 'dateformat';
+import { getFullApAccount } from '@/misc/convert-host';
+import { Users, Mutings } from '@/models/index';
+import { MoreThan } from 'typeorm';
+import { DbUserJobData } from '@/queue/types';
+
+const logger = queueLogger.createSubLogger('export-mute');
+
+export async function exportMute(job: Bull.Job<DbUserJobData>, done: any): Promise<void> {
+	logger.info(`Exporting mute of ${job.data.user.id} ...`);
+
+	const user = await Users.findOne(job.data.user.id);
+	if (user == null) {
+		done();
+		return;
+	}
+
+	// Create temp file
+	const [path, cleanup] = await new Promise<[string, any]>((res, rej) => {
+		tmp.file((e, path, fd, cleanup) => {
+			if (e) return rej(e);
+			res([path, cleanup]);
+		});
+	});
+
+	logger.info(`Temp file is ${path}`);
+
+	const stream = fs.createWriteStream(path, { flags: 'a' });
+
+	let exportedCount = 0;
+	let cursor: any = null;
+
+	while (true) {
+		const mutes = await Mutings.find({
+			where: {
+				muterId: user.id,
+				...(cursor ? { id: MoreThan(cursor) } : {})
+			},
+			take: 100,
+			order: {
+				id: 1
+			}
+		});
+
+		if (mutes.length === 0) {
+			job.progress(100);
+			break;
+		}
+
+		cursor = mutes[mutes.length - 1].id;
+
+		for (const mute of mutes) {
+			const u = await Users.findOne({ id: mute.muteeId });
+			if (u == null) {
+				exportedCount++; continue;
+			}
+
+			const content = getFullApAccount(u.username, u.host);
+			await new Promise<void>((res, rej) => {
+				stream.write(content + '\n', err => {
+					if (err) {
+						logger.error(err);
+						rej(err);
+					} else {
+						res();
+					}
+				});
+			});
+			exportedCount++;
+		}
+
+		const total = await Mutings.count({
+			muterId: user.id,
+		});
+
+		job.progress(exportedCount / total);
+	}
+
+	stream.end();
+	logger.succ(`Exported to: ${path}`);
+
+	const fileName = 'mute-' + dateFormat(new Date(), 'yyyy-mm-dd-HH-MM-ss') + '.csv';
+	const driveFile = await addFile(user, path, fileName, null, null, true);
+
+	logger.succ(`Exported to: ${driveFile.id}`);
+	cleanup();
+	done();
+}
diff --git a/packages/backend/src/queue/processors/db/export-notes.ts b/packages/backend/src/queue/processors/db/export-notes.ts
new file mode 100644
index 0000000000..49850aa706
--- /dev/null
+++ b/packages/backend/src/queue/processors/db/export-notes.ts
@@ -0,0 +1,133 @@
+import * as Bull from 'bull';
+import * as tmp from 'tmp';
+import * as fs from 'fs';
+
+import { queueLogger } from '../../logger';
+import addFile from '@/services/drive/add-file';
+import * as dateFormat from 'dateformat';
+import { Users, Notes, Polls } from '@/models/index';
+import { MoreThan } from 'typeorm';
+import { Note } from '@/models/entities/note';
+import { Poll } from '@/models/entities/poll';
+import { DbUserJobData } from '@/queue/types';
+
+const logger = queueLogger.createSubLogger('export-notes');
+
+export async function exportNotes(job: Bull.Job<DbUserJobData>, done: any): Promise<void> {
+	logger.info(`Exporting notes of ${job.data.user.id} ...`);
+
+	const user = await Users.findOne(job.data.user.id);
+	if (user == null) {
+		done();
+		return;
+	}
+
+	// Create temp file
+	const [path, cleanup] = await new Promise<[string, any]>((res, rej) => {
+		tmp.file((e, path, fd, cleanup) => {
+			if (e) return rej(e);
+			res([path, cleanup]);
+		});
+	});
+
+	logger.info(`Temp file is ${path}`);
+
+	const stream = fs.createWriteStream(path, { flags: 'a' });
+
+	await new Promise<void>((res, rej) => {
+		stream.write('[', err => {
+			if (err) {
+				logger.error(err);
+				rej(err);
+			} else {
+				res();
+			}
+		});
+	});
+
+	let exportedNotesCount = 0;
+	let cursor: any = null;
+
+	while (true) {
+		const notes = await Notes.find({
+			where: {
+				userId: user.id,
+				...(cursor ? { id: MoreThan(cursor) } : {})
+			},
+			take: 100,
+			order: {
+				id: 1
+			}
+		});
+
+		if (notes.length === 0) {
+			job.progress(100);
+			break;
+		}
+
+		cursor = notes[notes.length - 1].id;
+
+		for (const note of notes) {
+			let poll: Poll | undefined;
+			if (note.hasPoll) {
+				poll = await Polls.findOneOrFail({ noteId: note.id });
+			}
+			const content = JSON.stringify(serialize(note, poll));
+			await new Promise<void>((res, rej) => {
+				stream.write(exportedNotesCount === 0 ? content : ',\n' + content, err => {
+					if (err) {
+						logger.error(err);
+						rej(err);
+					} else {
+						res();
+					}
+				});
+			});
+			exportedNotesCount++;
+		}
+
+		const total = await Notes.count({
+			userId: user.id,
+		});
+
+		job.progress(exportedNotesCount / total);
+	}
+
+	await new Promise<void>((res, rej) => {
+		stream.write(']', err => {
+			if (err) {
+				logger.error(err);
+				rej(err);
+			} else {
+				res();
+			}
+		});
+	});
+
+	stream.end();
+	logger.succ(`Exported to: ${path}`);
+
+	const fileName = 'notes-' + dateFormat(new Date(), 'yyyy-mm-dd-HH-MM-ss') + '.json';
+	const driveFile = await addFile(user, path, fileName, null, null, true);
+
+	logger.succ(`Exported to: ${driveFile.id}`);
+	cleanup();
+	done();
+}
+
+function serialize(note: Note, poll: Poll | null = null): any {
+	return {
+		id: note.id,
+		text: note.text,
+		createdAt: note.createdAt,
+		fileIds: note.fileIds,
+		replyId: note.replyId,
+		renoteId: note.renoteId,
+		poll: poll,
+		cw: note.cw,
+		viaMobile: note.viaMobile,
+		visibility: note.visibility,
+		visibleUserIds: note.visibleUserIds,
+		localOnly: note.localOnly
+	};
+}
diff --git a/packages/backend/src/queue/processors/db/export-user-lists.ts b/packages/backend/src/queue/processors/db/export-user-lists.ts
new file mode 100644
index 0000000000..8a86c4df5d
--- /dev/null
+++ b/packages/backend/src/queue/processors/db/export-user-lists.ts
@@ -0,0 +1,71 @@
+import * as Bull from 'bull';
+import * as tmp from 'tmp';
+import * as fs from 'fs';
+
+import { queueLogger } from '../../logger';
+import addFile from '@/services/drive/add-file';
+import * as dateFormat from 'dateformat';
+import { getFullApAccount } from '@/misc/convert-host';
+import { Users, UserLists, UserListJoinings } from '@/models/index';
+import { In } from 'typeorm';
+import { DbUserJobData } from '@/queue/types';
+
+const logger = queueLogger.createSubLogger('export-user-lists');
+
+export async function exportUserLists(job: Bull.Job<DbUserJobData>, done: any): Promise<void> {
+	logger.info(`Exporting user lists of ${job.data.user.id} ...`);
+
+	const user = await Users.findOne(job.data.user.id);
+	if (user == null) {
+		done();
+		return;
+	}
+
+	const lists = await UserLists.find({
+		userId: user.id
+	});
+
+	// Create temp file
+	const [path, cleanup] = await new Promise<[string, any]>((res, rej) => {
+		tmp.file((e, path, fd, cleanup) => {
+			if (e) return rej(e);
+			res([path, cleanup]);
+		});
+	});
+
+	logger.info(`Temp file is ${path}`);
+
+	const stream = fs.createWriteStream(path, { flags: 'a' });
+
+	for (const list of lists) {
+		const joinings = await UserListJoinings.find({ userListId: list.id });
+		const users = await Users.find({
+			id: In(joinings.map(j => j.userId))
+		});
+
+		for (const u of users) {
+			const acct = getFullApAccount(u.username, u.host);
+			const content = `${list.name},${acct}`;
+			await new Promise<void>((res, rej) => {
+				stream.write(content + '\n', err => {
+					if (err) {
+						logger.error(err);
+						rej(err);
+					} else {
+						res();
+					}
+				});
+			});
+		}
+	}
+
+	stream.end();
+	logger.succ(`Exported to: ${path}`);
+
+	const fileName = 'user-lists-' + dateFormat(new Date(), 'yyyy-mm-dd-HH-MM-ss') + '.csv';
+	const driveFile = await addFile(user, path, fileName, null, null, true);
+
+	logger.succ(`Exported to: ${driveFile.id}`);
+	cleanup();
+	done();
+}
diff --git a/packages/backend/src/queue/processors/db/import-blocking.ts b/packages/backend/src/queue/processors/db/import-blocking.ts
new file mode 100644
index 0000000000..2e77107034
--- /dev/null
+++ b/packages/backend/src/queue/processors/db/import-blocking.ts
@@ -0,0 +1,74 @@
+import * as Bull from 'bull';
+
+import { queueLogger } from '../../logger';
+import * as Acct from 'misskey-js/built/acct';
+import { resolveUser } from '@/remote/resolve-user';
+import { downloadTextFile } from '@/misc/download-text-file';
+import { isSelfHost, toPuny } from '@/misc/convert-host';
+import { Users, DriveFiles, Blockings } from '@/models/index';
+import { DbUserImportJobData } from '@/queue/types';
+import block from '@/services/blocking/create';
+
+const logger = queueLogger.createSubLogger('import-blocking');
+
+export async function importBlocking(job: Bull.Job<DbUserImportJobData>, done: any): Promise<void> {
+	logger.info(`Importing blocking of ${job.data.user.id} ...`);
+
+	const user = await Users.findOne(job.data.user.id);
+	if (user == null) {
+		done();
+		return;
+	}
+
+	const file = await DriveFiles.findOne({
+		id: job.data.fileId
+	});
+	if (file == null) {
+		done();
+		return;
+	}
+
+	const csv = await downloadTextFile(file.url);
+
+	let linenum = 0;
+
+	for (const line of csv.trim().split('\n')) {
+		linenum++;
+
+		try {
+			const acct = line.split(',')[0].trim();
+			const { username, host } = Acct.parse(acct);
+
+			let target = isSelfHost(host!) ? await Users.findOne({
+				host: null,
+				usernameLower: username.toLowerCase()
+			}) : await Users.findOne({
+				host: toPuny(host!),
+				usernameLower: username.toLowerCase()
+			});
+
+			if (host == null && target == null) continue;
+
+			if (target == null) {
+				target = await resolveUser(username, host);
+			}
+
+			if (target == null) {
+				throw `cannot resolve user: @${username}@${host}`;
+			}
+
+			// skip myself
+			if (target.id === job.data.user.id) continue;
+
+			logger.info(`Block[${linenum}] ${target.id} ...`);
+
+			await block(user, target);
+		} catch (e) {
+			logger.warn(`Error in line:${linenum} ${e}`);
+		}
+	}
+
+	logger.succ('Imported');
+	done();
+}
+
diff --git a/packages/backend/src/queue/processors/db/import-following.ts b/packages/backend/src/queue/processors/db/import-following.ts
new file mode 100644
index 0000000000..2bd079e4bc
--- /dev/null
+++ b/packages/backend/src/queue/processors/db/import-following.ts
@@ -0,0 +1,73 @@
+import * as Bull from 'bull';
+
+import { queueLogger } from '../../logger';
+import follow from '@/services/following/create';
+import * as Acct from 'misskey-js/built/acct';
+import { resolveUser } from '@/remote/resolve-user';
+import { downloadTextFile } from '@/misc/download-text-file';
+import { isSelfHost, toPuny } from '@/misc/convert-host';
+import { Users, DriveFiles } from '@/models/index';
+import { DbUserImportJobData } from '@/queue/types';
+
+const logger = queueLogger.createSubLogger('import-following');
+
+export async function importFollowing(job: Bull.Job<DbUserImportJobData>, done: any): Promise<void> {
+	logger.info(`Importing following of ${job.data.user.id} ...`);
+
+	const user = await Users.findOne(job.data.user.id);
+	if (user == null) {
+		done();
+		return;
+	}
+
+	const file = await DriveFiles.findOne({
+		id: job.data.fileId
+	});
+	if (file == null) {
+		done();
+		return;
+	}
+
+	const csv = await downloadTextFile(file.url);
+
+	let linenum = 0;
+
+	for (const line of csv.trim().split('\n')) {
+		linenum++;
+
+		try {
+			const acct = line.split(',')[0].trim();
+			const { username, host } = Acct.parse(acct);
+
+			let target = isSelfHost(host!) ? await Users.findOne({
+				host: null,
+				usernameLower: username.toLowerCase()
+			}) : await Users.findOne({
+				host: toPuny(host!),
+				usernameLower: username.toLowerCase()
+			});
+
+			if (host == null && target == null) continue;
+
+			if (target == null) {
+				target = await resolveUser(username, host);
+			}
+
+			if (target == null) {
+				throw `cannot resolve user: @${username}@${host}`;
+			}
+
+			// skip myself
+			if (target.id === job.data.user.id) continue;
+
+			logger.info(`Follow[${linenum}] ${target.id} ...`);
+
+			follow(user, target);
+		} catch (e) {
+			logger.warn(`Error in line:${linenum} ${e}`);
+		}
+	}
+
+	logger.succ('Imported');
+	done();
+}
diff --git a/packages/backend/src/queue/processors/db/import-muting.ts b/packages/backend/src/queue/processors/db/import-muting.ts
new file mode 100644
index 0000000000..8060980625
--- /dev/null
+++ b/packages/backend/src/queue/processors/db/import-muting.ts
@@ -0,0 +1,83 @@
+import * as Bull from 'bull';
+
+import { queueLogger } from '../../logger';
+import * as Acct from 'misskey-js/built/acct';
+import { resolveUser } from '@/remote/resolve-user';
+import { downloadTextFile } from '@/misc/download-text-file';
+import { isSelfHost, toPuny } from '@/misc/convert-host';
+import { Users, DriveFiles, Mutings } from '@/models/index';
+import { DbUserImportJobData } from '@/queue/types';
+import { User } from '@/models/entities/user';
+import { genId } from '@/misc/gen-id';
+
+const logger = queueLogger.createSubLogger('import-muting');
+
+export async function importMuting(job: Bull.Job<DbUserImportJobData>, done: any): Promise<void> {
+	logger.info(`Importing muting of ${job.data.user.id} ...`);
+
+	const user = await Users.findOne(job.data.user.id);
+	if (user == null) {
+		done();
+		return;
+	}
+
+	const file = await DriveFiles.findOne({
+		id: job.data.fileId
+	});
+	if (file == null) {
+		done();
+		return;
+	}
+
+	const csv = await downloadTextFile(file.url);
+
+	let linenum = 0;
+
+	for (const line of csv.trim().split('\n')) {
+		linenum++;
+
+		try {
+			const acct = line.split(',')[0].trim();
+			const { username, host } = Acct.parse(acct);
+
+			let target = isSelfHost(host!) ? await Users.findOne({
+				host: null,
+				usernameLower: username.toLowerCase()
+			}) : await Users.findOne({
+				host: toPuny(host!),
+				usernameLower: username.toLowerCase()
+			});
+
+			if (host == null && target == null) continue;
+
+			if (target == null) {
+				target = await resolveUser(username, host);
+			}
+
+			if (target == null) {
+				throw `cannot resolve user: @${username}@${host}`;
+			}
+
+			// skip myself
+			if (target.id === job.data.user.id) continue;
+
+			logger.info(`Mute[${linenum}] ${target.id} ...`);
+
+			await mute(user, target);
+		} catch (e) {
+			logger.warn(`Error in line:${linenum} ${e}`);
+		}
+	}
+
+	logger.succ('Imported');
+	done();
+}
+
+async function mute(user: User, target: User) {
+	await Mutings.insert({
+		id: genId(),
+		createdAt: new Date(),
+		muterId: user.id,
+		muteeId: target.id,
+	});
+}
diff --git a/packages/backend/src/queue/processors/db/import-user-lists.ts b/packages/backend/src/queue/processors/db/import-user-lists.ts
new file mode 100644
index 0000000000..46b728b387
--- /dev/null
+++ b/packages/backend/src/queue/processors/db/import-user-lists.ts
@@ -0,0 +1,80 @@
+import * as Bull from 'bull';
+
+import { queueLogger } from '../../logger';
+import * as Acct from 'misskey-js/built/acct';
+import { resolveUser } from '@/remote/resolve-user';
+import { pushUserToUserList } from '@/services/user-list/push';
+import { downloadTextFile } from '@/misc/download-text-file';
+import { isSelfHost, toPuny } from '@/misc/convert-host';
+import { DriveFiles, Users, UserLists, UserListJoinings } from '@/models/index';
+import { genId } from '@/misc/gen-id';
+import { DbUserImportJobData } from '@/queue/types';
+
+const logger = queueLogger.createSubLogger('import-user-lists');
+
+export async function importUserLists(job: Bull.Job<DbUserImportJobData>, done: any): Promise<void> {
+	logger.info(`Importing user lists of ${job.data.user.id} ...`);
+
+	const user = await Users.findOne(job.data.user.id);
+	if (user == null) {
+		done();
+		return;
+	}
+
+	const file = await DriveFiles.findOne({
+		id: job.data.fileId
+	});
+	if (file == null) {
+		done();
+		return;
+	}
+
+	const csv = await downloadTextFile(file.url);
+
+	let linenum = 0;
+
+	for (const line of csv.trim().split('\n')) {
+		linenum++;
+
+		try {
+			const listName = line.split(',')[0].trim();
+			const { username, host } = Acct.parse(line.split(',')[1].trim());
+
+			let list = await UserLists.findOne({
+				userId: user.id,
+				name: listName
+			});
+
+			if (list == null) {
+				list = await UserLists.save({
+					id: genId(),
+					createdAt: new Date(),
+					userId: user.id,
+					name: listName,
+					userIds: []
+				});
+			}
+
+			let target = isSelfHost(host!) ? await Users.findOne({
+				host: null,
+				usernameLower: username.toLowerCase()
+			}) : await Users.findOne({
+				host: toPuny(host!),
+				usernameLower: username.toLowerCase()
+			});
+
+			if (target == null) {
+				target = await resolveUser(username, host);
+			}
+
+			if (await UserListJoinings.findOne({ userListId: list.id, userId: target.id }) != null) continue;
+
+			pushUserToUserList(target, list);
+		} catch (e) {
+			logger.warn(`Error in line:${linenum} ${e}`);
+		}
+	}
+
+	logger.succ('Imported');
+	done();
+}
diff --git a/packages/backend/src/queue/processors/db/index.ts b/packages/backend/src/queue/processors/db/index.ts
new file mode 100644
index 0000000000..97087642b7
--- /dev/null
+++ b/packages/backend/src/queue/processors/db/index.ts
@@ -0,0 +1,33 @@
+import * as Bull from 'bull';
+import { DbJobData } from '@/queue/types';
+import { deleteDriveFiles } from './delete-drive-files';
+import { exportNotes } from './export-notes';
+import { exportFollowing } from './export-following';
+import { exportMute } from './export-mute';
+import { exportBlocking } from './export-blocking';
+import { exportUserLists } from './export-user-lists';
+import { importFollowing } from './import-following';
+import { importUserLists } from './import-user-lists';
+import { deleteAccount } from './delete-account';
+import { importMuting } from './import-muting';
+import { importBlocking } from './import-blocking';
+
+const jobs = {
+	deleteDriveFiles,
+	exportNotes,
+	exportFollowing,
+	exportMute,
+	exportBlocking,
+	exportUserLists,
+	importFollowing,
+	importMuting,
+	importBlocking,
+	importUserLists,
+	deleteAccount,
+} as Record<string, Bull.ProcessCallbackFunction<DbJobData> | Bull.ProcessPromiseFunction<DbJobData>>;
+
+export default function(dbQueue: Bull.Queue<DbJobData>) {
+	for (const [k, v] of Object.entries(jobs)) {
+		dbQueue.process(k, v);
+	}
+}
diff --git a/packages/backend/src/queue/processors/deliver.ts b/packages/backend/src/queue/processors/deliver.ts
new file mode 100644
index 0000000000..3c61896a2f
--- /dev/null
+++ b/packages/backend/src/queue/processors/deliver.ts
@@ -0,0 +1,94 @@
+import { URL } from 'url';
+import * as Bull from 'bull';
+import request from '@/remote/activitypub/request';
+import { registerOrFetchInstanceDoc } from '@/services/register-or-fetch-instance-doc';
+import Logger from '@/services/logger';
+import { Instances } from '@/models/index';
+import { instanceChart } from '@/services/chart/index';
+import { fetchInstanceMetadata } from '@/services/fetch-instance-metadata';
+import { fetchMeta } from '@/misc/fetch-meta';
+import { toPuny } from '@/misc/convert-host';
+import { Cache } from '@/misc/cache';
+import { Instance } from '@/models/entities/instance';
+import { DeliverJobData } from '../types';
+import { StatusError } from '@/misc/fetch';
+
+const logger = new Logger('deliver');
+
+let latest: string | null = null;
+
+const suspendedHostsCache = new Cache<Instance[]>(1000 * 60 * 60);
+
+export default async (job: Bull.Job<DeliverJobData>) => {
+	const { host } = new URL(job.data.to);
+
+	// ブロックしてたら中断
+	const meta = await fetchMeta();
+	if (meta.blockedHosts.includes(toPuny(host))) {
+		return 'skip (blocked)';
+	}
+
+	// isSuspendedなら中断
+	let suspendedHosts = suspendedHostsCache.get(null);
+	if (suspendedHosts == null) {
+		suspendedHosts = await Instances.find({
+			where: {
+				isSuspended: true
+			},
+		});
+		suspendedHostsCache.set(null, suspendedHosts);
+	}
+	if (suspendedHosts.map(x => x.host).includes(toPuny(host))) {
+		return 'skip (suspended)';
+	}
+
+	try {
+		if (latest !== (latest = JSON.stringify(job.data.content, null, 2))) {
+			logger.debug(`delivering ${latest}`);
+		}
+
+		await request(job.data.user, job.data.to, job.data.content);
+
+		// Update stats
+		registerOrFetchInstanceDoc(host).then(i => {
+			Instances.update(i.id, {
+				latestRequestSentAt: new Date(),
+				latestStatus: 200,
+				lastCommunicatedAt: new Date(),
+				isNotResponding: false
+			});
+
+			fetchInstanceMetadata(i);
+
+			instanceChart.requestSent(i.host, true);
+		});
+
+		return 'Success';
+	} catch (res) {
+		// Update stats
+		registerOrFetchInstanceDoc(host).then(i => {
+			Instances.update(i.id, {
+				latestRequestSentAt: new Date(),
+				latestStatus: res instanceof StatusError ? res.statusCode : null,
+				isNotResponding: true
+			});
+
+			instanceChart.requestSent(i.host, false);
+		});
+
+		if (res instanceof StatusError) {
+			// 4xx
+			if (res.isClientError) {
+				// HTTPステータスコード4xxはクライアントエラーであり、それはつまり
+				// 何回再送しても成功することはないということなのでエラーにはしないでおく
+				return `${res.statusCode} ${res.statusMessage}`;
+			}
+
+			// 5xx etc.
+			throw `${res.statusCode} ${res.statusMessage}`;
+		} else {
+			// DNS error, socket error, timeout ...
+			throw res;
+		}
+	}
+};
diff --git a/packages/backend/src/queue/processors/inbox.ts b/packages/backend/src/queue/processors/inbox.ts
new file mode 100644
index 0000000000..4032ce8653
--- /dev/null
+++ b/packages/backend/src/queue/processors/inbox.ts
@@ -0,0 +1,149 @@
+import { URL } from 'url';
+import * as Bull from 'bull';
+import * as httpSignature from 'http-signature';
+import perform from '@/remote/activitypub/perform';
+import Logger from '@/services/logger';
+import { registerOrFetchInstanceDoc } from '@/services/register-or-fetch-instance-doc';
+import { Instances } from '@/models/index';
+import { instanceChart } from '@/services/chart/index';
+import { fetchMeta } from '@/misc/fetch-meta';
+import { toPuny, extractDbHost } from '@/misc/convert-host';
+import { getApId } from '@/remote/activitypub/type';
+import { fetchInstanceMetadata } from '@/services/fetch-instance-metadata';
+import { InboxJobData } from '../types';
+import DbResolver from '@/remote/activitypub/db-resolver';
+import { resolvePerson } from '@/remote/activitypub/models/person';
+import { LdSignature } from '@/remote/activitypub/misc/ld-signature';
+import { StatusError } from '@/misc/fetch';
+
+const logger = new Logger('inbox');
+
+// ユーザーのinboxにアクティビティが届いた時の処理
+export default async (job: Bull.Job<InboxJobData>): Promise<string> => {
+	const signature = job.data.signature;	// HTTP-signature
+	const activity = job.data.activity;
+
+	//#region Log
+	const info = Object.assign({}, activity) as any;
+	delete info['@context'];
+	logger.debug(JSON.stringify(info, null, 2));
+	//#endregion
+
+	const host = toPuny(new URL(signature.keyId).hostname);
+
+	// ブロックしてたら中断
+	const meta = await fetchMeta();
+	if (meta.blockedHosts.includes(host)) {
+		return `Blocked request: ${host}`;
+	}
+
+	const keyIdLower = signature.keyId.toLowerCase();
+	if (keyIdLower.startsWith('acct:')) {
+		return `Old keyId is no longer supported. ${keyIdLower}`;
+	}
+
+	// TDOO: キャッシュ
+	const dbResolver = new DbResolver();
+
+	// HTTP-Signature keyIdを元にDBから取得
+	let authUser = await dbResolver.getAuthUserFromKeyId(signature.keyId);
+
+	// keyIdでわからなければ、activity.actorを元にDBから取得 || activity.actorを元にリモートから取得
+	if (authUser == null) {
+		try {
+			authUser = await dbResolver.getAuthUserFromApId(getApId(activity.actor));
+		} catch (e) {
+			// 対象が4xxならスキップ
+			if (e instanceof StatusError && e.isClientError) {
+				return `skip: Ignored deleted actors on both ends ${activity.actor} - ${e.statusCode}`;
+			}
+			throw `Error in actor ${activity.actor} - ${e.statusCode || e}`;
+		}
+	}
+
+	// それでもわからなければ終了
+	if (authUser == null) {
+		return `skip: failed to resolve user`;
+	}
+
+	// publicKey がなくても終了
+	if (authUser.key == null) {
+		return `skip: failed to resolve user publicKey`;
+	}
+
+	// HTTP-Signatureの検証
+	const httpSignatureValidated = httpSignature.verifySignature(signature, authUser.key.keyPem);
+
+	// また、signatureのsignerは、activity.actorと一致する必要がある
+	if (!httpSignatureValidated || authUser.user.uri !== activity.actor) {
+		// 一致しなくても、でもLD-Signatureがありそうならそっちも見る
+		if (activity.signature) {
+			if (activity.signature.type !== 'RsaSignature2017') {
+				return `skip: unsupported LD-signature type ${activity.signature.type}`;
+			}
+
+			// activity.signature.creator: https://example.oom/users/user#main-key
+			// みたいになっててUserを引っ張れば公開キーも入ることを期待する
+			if (activity.signature.creator) {
+				const candicate = activity.signature.creator.replace(/#.*/, '');
+				await resolvePerson(candicate).catch(() => null);
+			}
+
+			// keyIdからLD-Signatureのユーザーを取得
+			authUser = await dbResolver.getAuthUserFromKeyId(activity.signature.creator);
+			if (authUser == null) {
+				return `skip: LD-Signatureのユーザーが取得できませんでした`;
+			}
+
+			if (authUser.key == null) {
+				return `skip: LD-SignatureのユーザーはpublicKeyを持っていませんでした`;
+			}
+
+			// LD-Signature検証
+			const ldSignature = new LdSignature();
+			const verified = await ldSignature.verifyRsaSignature2017(activity, authUser.key.keyPem).catch(() => false);
+			if (!verified) {
+				return `skip: LD-Signatureの検証に失敗しました`;
+			}
+
+			// もう一度actorチェック
+			if (authUser.user.uri !== activity.actor) {
+				return `skip: LD-Signature user(${authUser.user.uri}) !== activity.actor(${activity.actor})`;
+			}
+
+			// ブロックしてたら中断
+			const ldHost = extractDbHost(authUser.user.uri);
+			if (meta.blockedHosts.includes(ldHost)) {
+				return `Blocked request: ${ldHost}`;
+			}
+		} else {
+			return `skip: http-signature verification failed and no LD-Signature. keyId=${signature.keyId}`;
+		}
+	}
+
+	// activity.idがあればホストが署名者のホストであることを確認する
+	if (typeof activity.id === 'string') {
+		const signerHost = extractDbHost(authUser.user.uri!);
+		const activityIdHost = extractDbHost(activity.id);
+		if (signerHost !== activityIdHost) {
+			return `skip: signerHost(${signerHost}) !== activity.id host(${activityIdHost}`;
+		}
+	}
+
+	// Update stats
+	registerOrFetchInstanceDoc(authUser.user.host).then(i => {
+		Instances.update(i.id, {
+			latestRequestReceivedAt: new Date(),
+			lastCommunicatedAt: new Date(),
+			isNotResponding: false
+		});
+
+		fetchInstanceMetadata(i);
+
+		instanceChart.requestReceived(i.host);
+	});
+
+	// アクティビティを処理
+	await perform(authUser.user, activity);
+	return `ok`;
+};
diff --git a/packages/backend/src/queue/processors/object-storage/clean-remote-files.ts b/packages/backend/src/queue/processors/object-storage/clean-remote-files.ts
new file mode 100644
index 0000000000..3b2e4ea939
--- /dev/null
+++ b/packages/backend/src/queue/processors/object-storage/clean-remote-files.ts
@@ -0,0 +1,50 @@
+import * as Bull from 'bull';
+
+import { queueLogger } from '../../logger';
+import { deleteFileSync } from '@/services/drive/delete-file';
+import { DriveFiles } from '@/models/index';
+import { MoreThan, Not, IsNull } from 'typeorm';
+
+const logger = queueLogger.createSubLogger('clean-remote-files');
+
+export default async function cleanRemoteFiles(job: Bull.Job<{}>, done: any): Promise<void> {
+	logger.info(`Deleting cached remote files...`);
+
+	let deletedCount = 0;
+	let cursor: any = null;
+
+	while (true) {
+		const files = await DriveFiles.find({
+			where: {
+				userHost: Not(IsNull()),
+				isLink: false,
+				...(cursor ? { id: MoreThan(cursor) } : {})
+			},
+			take: 8,
+			order: {
+				id: 1
+			}
+		});
+
+		if (files.length === 0) {
+			job.progress(100);
+			break;
+		}
+
+		cursor = files[files.length - 1].id;
+
+		await Promise.all(files.map(file => deleteFileSync(file, true)));
+
+		deletedCount += 8;
+
+		const total = await DriveFiles.count({
+			userHost: Not(IsNull()),
+			isLink: false,
+		});
+
+		job.progress(deletedCount / total);
+	}
+
+	logger.succ(`All cahced remote files has been deleted.`);
+	done();
+}
diff --git a/packages/backend/src/queue/processors/object-storage/delete-file.ts b/packages/backend/src/queue/processors/object-storage/delete-file.ts
new file mode 100644
index 0000000000..ed22968a27
--- /dev/null
+++ b/packages/backend/src/queue/processors/object-storage/delete-file.ts
@@ -0,0 +1,11 @@
+import { ObjectStorageFileJobData } from '@/queue/types';
+import * as Bull from 'bull';
+import { deleteObjectStorageFile } from '@/services/drive/delete-file';
+
+export default async (job: Bull.Job<ObjectStorageFileJobData>) => {
+	const key: string = job.data.key;
+
+	await deleteObjectStorageFile(key);
+
+	return 'Success';
+};
diff --git a/packages/backend/src/queue/processors/object-storage/index.ts b/packages/backend/src/queue/processors/object-storage/index.ts
new file mode 100644
index 0000000000..0d9570e179
--- /dev/null
+++ b/packages/backend/src/queue/processors/object-storage/index.ts
@@ -0,0 +1,15 @@
+import * as Bull from 'bull';
+import { ObjectStorageJobData } from '@/queue/types';
+import deleteFile from './delete-file';
+import cleanRemoteFiles from './clean-remote-files';
+
+const jobs = {
+	deleteFile,
+	cleanRemoteFiles,
+} as Record<string, Bull.ProcessCallbackFunction<ObjectStorageJobData> | Bull.ProcessPromiseFunction<ObjectStorageJobData>>;
+
+export default function(q: Bull.Queue) {
+	for (const [k, v] of Object.entries(jobs)) {
+		q.process(k, 16, v);
+	}
+}
diff --git a/packages/backend/src/queue/processors/system/index.ts b/packages/backend/src/queue/processors/system/index.ts
new file mode 100644
index 0000000000..52b7868105
--- /dev/null
+++ b/packages/backend/src/queue/processors/system/index.ts
@@ -0,0 +1,12 @@
+import * as Bull from 'bull';
+import { resyncCharts } from './resync-charts';
+
+const jobs = {
+	resyncCharts,
+} as Record<string, Bull.ProcessCallbackFunction<{}> | Bull.ProcessPromiseFunction<{}>>;
+
+export default function(dbQueue: Bull.Queue<{}>) {
+	for (const [k, v] of Object.entries(jobs)) {
+		dbQueue.process(k, v);
+	}
+}
diff --git a/packages/backend/src/queue/processors/system/resync-charts.ts b/packages/backend/src/queue/processors/system/resync-charts.ts
new file mode 100644
index 0000000000..b36b024cfb
--- /dev/null
+++ b/packages/backend/src/queue/processors/system/resync-charts.ts
@@ -0,0 +1,21 @@
+import * as Bull from 'bull';
+
+import { queueLogger } from '../../logger';
+import { driveChart, notesChart, usersChart } from '@/services/chart/index';
+
+const logger = queueLogger.createSubLogger('resync-charts');
+
+export default async function resyncCharts(job: Bull.Job<{}>, done: any): Promise<void> {
+	logger.info(`Resync charts...`);
+
+	// TODO: ユーザーごとのチャートも更新する
+	// TODO: インスタンスごとのチャートも更新する
+	await Promise.all([
+		driveChart.resync(),
+		notesChart.resync(),
+		usersChart.resync(),
+	]);
+
+	logger.succ(`All charts successfully resynced.`);
+	done();
+}
diff --git a/packages/backend/src/queue/queues.ts b/packages/backend/src/queue/queues.ts
new file mode 100644
index 0000000000..a66a7ca451
--- /dev/null
+++ b/packages/backend/src/queue/queues.ts
@@ -0,0 +1,9 @@
+import config from '@/config/index';
+import { initialize as initializeQueue } from './initialize';
+import { DeliverJobData, InboxJobData, DbJobData, ObjectStorageJobData } from './types';
+
+export const systemQueue = initializeQueue<{}>('system');
+export const deliverQueue = initializeQueue<DeliverJobData>('deliver', config.deliverJobPerSec || 128);
+export const inboxQueue = initializeQueue<InboxJobData>('inbox', config.inboxJobPerSec || 16);
+export const dbQueue = initializeQueue<DbJobData>('db');
+export const objectStorageQueue = initializeQueue<ObjectStorageJobData>('objectStorage');
diff --git a/packages/backend/src/queue/types.ts b/packages/backend/src/queue/types.ts
new file mode 100644
index 0000000000..39cab29966
--- /dev/null
+++ b/packages/backend/src/queue/types.ts
@@ -0,0 +1,44 @@
+import { DriveFile } from '@/models/entities/drive-file';
+import { User } from '@/models/entities/user';
+import { IActivity } from '@/remote/activitypub/type';
+import * as httpSignature from 'http-signature';
+
+export type DeliverJobData = {
+	/** Actor */
+	user: ThinUser;
+	/** Activity */
+	content: unknown;
+	/** inbox URL to deliver */
+	to: string;
+};
+
+export type InboxJobData = {
+	activity: IActivity;
+	signature: httpSignature.IParsedSignature;
+};
+
+export type DbJobData = DbUserJobData | DbUserImportJobData | DbUserDeleteJobData;
+
+export type DbUserJobData = {
+	user: ThinUser;
+};
+
+export type DbUserDeleteJobData = {
+	user: ThinUser;
+	soft?: boolean;
+};
+
+export type DbUserImportJobData = {
+	user: ThinUser;
+	fileId: DriveFile['id'];
+};
+
+export type ObjectStorageJobData = ObjectStorageFileJobData | {};
+
+export type ObjectStorageFileJobData = {
+	key: string;
+};
+
+export type ThinUser = {
+	id: User['id'];
+};