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enhance(backend): RedisへのTLの構築をListで行うように
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| /* | ||
| * SPDX-FileCopyrightText: syuilo and other misskey contributors | ||
| * SPDX-License-Identifier: AGPL-3.0-only | ||
| */ | ||
|
|
||
| import { Inject, Injectable } from '@nestjs/common'; | ||
| import * as Redis from 'ioredis'; | ||
| import { DI } from '@/di-symbols.js'; | ||
| import { bindThis } from '@/decorators.js'; | ||
| import { IdService } from '@/core/IdService.js'; | ||
|
|
||
| @Injectable() | ||
| export class RedisTimelineService { | ||
| constructor( | ||
| @Inject(DI.redisForTimelines) | ||
| private redisForTimelines: Redis.Redis, | ||
|
|
||
| private idService: IdService, | ||
| ) { | ||
| } | ||
|
|
||
| @bindThis | ||
| public push(tl: string, id: string, maxlen: number, pipeline: Redis.ChainableCommander) { | ||
| // リモートから遅れて届いた(もしくは後から追加された)投稿日時が古い投稿が追加されるとページネーション時に問題を引き起こすため、 | ||
| // 3分以内に投稿されたものでない場合、Redisにある最古のIDより新しい場合のみ追加する | ||
| if (this.idService.parse(id).date.getTime() > Date.now() - 1000 * 60 * 3) { | ||
| pipeline.lpush('list:' + tl, id); | ||
| if (Math.random() < 0.1) { // 10%の確率でトリム | ||
| pipeline.ltrim('list:' + tl, 0, maxlen - 1); | ||
| } | ||
| } else { | ||
| // 末尾のIDを取得 | ||
| this.redisForTimelines.lindex('list:' + tl, -1).then(lastId => { | ||
| if (lastId == null || (this.idService.parse(id).date.getTime() > this.idService.parse(lastId).date.getTime())) { | ||
| this.redisForTimelines.lpush('list:' + tl, id); | ||
| } else { | ||
| Promise.resolve(); | ||
| } | ||
| }); | ||
| } | ||
| } | ||
|
|
||
| @bindThis | ||
| public get(name: string, untilId?: string | null, sinceId?: string | null) { | ||
| if (untilId && sinceId) { | ||
| return this.redisForTimelines.lrange('list:' + name, 0, -1) | ||
| .then(ids => ids.filter(id => id > untilId && id < sinceId).sort((a, b) => a > b ? -1 : 1)); | ||
| } else if (untilId) { | ||
| return this.redisForTimelines.lrange('list:' + name, 0, -1) | ||
| .then(ids => ids.filter(id => id > untilId).sort((a, b) => a > b ? -1 : 1)); | ||
| } else if (sinceId) { | ||
| return this.redisForTimelines.lrange('list:' + name, 0, -1) | ||
| .then(ids => ids.filter(id => id < sinceId).sort((a, b) => a < b ? -1 : 1)); | ||
| } else { | ||
| return this.redisForTimelines.lrange('list:' + name, 0, -1) | ||
| .then(ids => ids.sort((a, b) => a > b ? -1 : 1)); | ||
| } | ||
| } | ||
|
|
||
| @bindThis | ||
| public getMulti(name: string[], untilId?: string | null, sinceId?: string | null): Promise<string[][]> { | ||
| const pipeline = this.redisForTimelines.pipeline(); | ||
| for (const n of name) { | ||
| pipeline.lrange('list:' + n, 0, -1); | ||
| } | ||
| return pipeline.exec().then(res => { | ||
| if (res == null) return []; | ||
| const tls = res.map(r => r[1] as string[]); | ||
| return tls.map(ids => | ||
| (untilId && sinceId) | ||
| ? ids.filter(id => id > untilId && id < sinceId).sort((a, b) => a > b ? -1 : 1) | ||
| : untilId | ||
| ? ids.filter(id => id > untilId).sort((a, b) => a > b ? -1 : 1) | ||
| : sinceId | ||
| ? ids.filter(id => id < sinceId).sort((a, b) => a < b ? -1 : 1) | ||
| : ids.sort((a, b) => a > b ? -1 : 1), | ||
| ); | ||
| }); | ||
| } | ||
| } |
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