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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,176 @@ | ||
| import { consumeJSON, resolveRequest, RESTClient } from '@fuwa/rest'; | ||
| import { ChildProcess, fork } from 'child_process'; | ||
| import { APIGatewayBotInfo, Routes } from 'discord-api-types/v10'; | ||
| import { STATUS_CODES } from 'http'; | ||
| import { isMainThread, Worker } from 'worker_threads'; | ||
|
|
||
| export class ShardingManager { | ||
| gatewayInfo!: APIGatewayBotInfo; | ||
| client: RESTClient; | ||
| workers: Map<number, ChildProcess | Worker> = new Map(); | ||
|
|
||
| constructor(public token: string, public options: ShardingManagerOptions) { | ||
| this.client = new RESTClient(RESTClient.getDefaultOptions(token)); | ||
| } | ||
|
|
||
| public async spawn() { | ||
| const token = this.token; | ||
|
|
||
| if (!token || typeof token !== 'string' || token.trim() == '') | ||
| throw new Error('Invalid token provided. Must be a non-empty string.'); | ||
|
|
||
| this.gatewayInfo = await this.client | ||
| .execute(resolveRequest({ route: Routes.gatewayBot() })) | ||
| .then(res => { | ||
| if (res.statusCode !== 200) { | ||
| throw new Error( | ||
| `[ShardingManager] Failed to get gateway info: ${res.statusCode} ${ | ||
| STATUS_CODES[res.statusCode] | ||
| }`, | ||
| ); | ||
| } | ||
|
|
||
| return res; | ||
| }) | ||
| .then(consumeJSON); | ||
|
|
||
| const { totalShards = this.gatewayInfo.shards } = this.options; | ||
|
|
||
| const shards = Array.isArray(this.options.shards) | ||
| ? this.options.shards.length === 2 | ||
| ? range(this.options.shards[0], this.options.shards[1]) | ||
| : this.options.shards | ||
| : this.options.shards === 'auto' | ||
| ? range(this.options.increment ?? 0, totalShards - 1) | ||
| : typeof this.options.shards === 'number' | ||
| ? range(this.options.increment ?? 0, this.options.shards - 1) | ||
| : null; | ||
|
|
||
| if (!shards) throw new Error('Invalid shards option'); | ||
|
|
||
| const _ = [...new Set(shards)]; | ||
|
|
||
| switch (this.options.mode) { | ||
| case 'process': | ||
| for (const i of _) { | ||
| console.debug(`[ShardingManager] Spawning process for shard ${i}`); | ||
| this.workers.set(i, this.spawnProcess(i)); | ||
| } | ||
| break; | ||
| case 'worker': | ||
| for (const i of _) { | ||
| console.debug(`[ShardingManager] Spawning worker for shard ${i}`); | ||
| this.workers.set(i, this.spawnWorker(i)); | ||
| } | ||
| break; | ||
| default: | ||
| throw new Error('Invalid mode option'); | ||
| } | ||
|
|
||
| process.on('exit', () => { | ||
| console.log('[ShardingManager] Shutting down'); | ||
| for (const [id, worker] of this.workers) { | ||
| if (worker instanceof ChildProcess) { | ||
| worker.kill(); | ||
| } else { | ||
| worker.terminate(); | ||
| } | ||
| console.log(`[ShardingManager] Killed worker ${id}`); | ||
| } | ||
| }); | ||
| } | ||
|
|
||
| private spawnProcess(id: number) { | ||
| const worker = fork(this.options.file, this.options.shardArgs ?? [], { | ||
| env: { | ||
| ...process.env, | ||
| __FUWA_SHARD_ID: id.toString(), | ||
| __FUWA_SHARD_COUNT: this.gatewayInfo.shards.toString(), | ||
| __FUWA_SHARDING_MANAGER: 'true', | ||
| }, | ||
| }); | ||
|
|
||
| worker.on('exit', code => { | ||
| if (code !== 0) { | ||
| console.error( | ||
| `[ShardingManager] Worker ${id} exited with code ${code}, respawning`, | ||
| ); | ||
| this.respawn(id); | ||
| } else { | ||
| console.log( | ||
| `[ShardingManager] Worker ${id} exited with success code ${code}`, | ||
| ); | ||
| } | ||
| }); | ||
|
|
||
| return worker; | ||
| } | ||
|
|
||
| private spawnWorker(id: number) { | ||
| if (!isMainThread) throw new Error('Cannot spawn worker in worker thread'); | ||
|
|
||
| const worker = new Worker(this.options.file, { | ||
| workerData: { | ||
| id, | ||
| count: this.gatewayInfo.shards, | ||
| __fuwa_sharding_manager: true, | ||
| }, | ||
| }); | ||
|
|
||
| worker.on('exit', code => { | ||
| if (code !== 0) { | ||
| console.error( | ||
| `[ShardingManager] Worker ${id} exited with code ${code}, respawning`, | ||
| ); | ||
| this.respawn(id); | ||
| } else { | ||
| console.log( | ||
| `[ShardingManager] Worker ${id} exited with success code ${code}`, | ||
| ); | ||
| } | ||
| }); | ||
|
|
||
| return worker; | ||
| } | ||
|
|
||
| respawn(id: number) { | ||
| switch (this.options.mode) { | ||
| case 'process': | ||
| this.workers.set(id, this.spawnProcess(id)); | ||
| break; | ||
| case 'worker': | ||
| this.workers.set(id, this.spawnWorker(id)); | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| handleMessage(d: any, id: number) { | ||
| console.log(`[ShardingManager] Received message from worker ${id}:`, d); | ||
|
|
||
| const buf = Buffer.from(d.toString()); | ||
|
|
||
| switch (buf.at(0)) { | ||
| case 1: | ||
| this.respawn(id); | ||
| break; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| export interface ShardingManagerOptions { | ||
| token: string; | ||
| shards: number | 'auto' | [number, number] | number[]; | ||
| fetchInfo?: boolean; | ||
| totalShards?: number; | ||
| limitPerWorker?: number; | ||
| increment?: number; | ||
| mode: 'process' | 'worker' | 'range'; | ||
| file: string; | ||
| respawn?: boolean; | ||
| autoSpawn?: boolean; | ||
| shardArgs?: string[]; | ||
| } | ||
|
|
||
| function range(start: number, end: number = start) { | ||
| return Array.from(new Array(end - start + 1), (_, i) => i + start); | ||
| } |