judge: use p-queue

packages/hydrojudge/src/daemon.ts

@@ -15,10 +15,10 @@
        ~                   */
 import './utils';
 
+import PQueue from 'p-queue';
 import { getConfig } from './config';
 import HydroHost from './hosts/hydro';
 import log from './log';
-import { Queue } from './utils';
 
 declare global {
     namespace NodeJS {
@@ -51,18 +51,11 @@ process.on('unhandledRejection', (reason, p) => {
     console.log('Unhandled Rejection at: Promise ', p);
 });
 
-async function worker(queue: Queue<any>) {
-    while ('Orz Soha') {
-        const [task] = await queue.get();
-        task.handle();
-    }
-}
-
 async function daemon() {
     const _hosts = getConfig('hosts');
     const hosts = {};
-    const queue = new Queue<any>();
+    const queue = new PQueue({ concurrency: Infinity });
-    worker(queue).catch((e) => log.error(e));
+    queue.on('error', (e) => log.error(e));
     for (const i in _hosts) {
         _hosts[i].host = _hosts[i].host || i;
         hosts[i] = new HydroHost(_hosts[i]);

packages/hydrojudge/src/hosts/hydro.ts

@@ -13,7 +13,7 @@ import { getConfig } from '../config';
 import { FormatError, SystemError } from '../error';
 import log from '../log';
 import { JudgeTask } from '../task';
-import { Lock, Queue } from '../utils';
+import { Lock } from '../utils';
 
 function removeNixPath(text: string) {
     return text.replace(/\/nix\/store\/[a-z0-9]{32}-/g, '/nix/');
@@ -150,7 +150,7 @@ export default class Hydro {
         };
     }
 
-    async consume(queue: Queue<any>) {
+    async consume(queue: PQueue) {
         log.info('正在连接 %sjudge/conn', this.config.server_url);
         this.ws = new WebSocket(`${this.config.server_url.replace(/^http/i, 'ws')}judge/conn`, {
             headers: {
@@ -165,7 +165,7 @@ export default class Hydro {
         this.ws.on('message', (data) => {
             const request = JSON.parse(data.toString());
             if (request.language) this.language = request.language;
-            if (request.task) queue.push(new JudgeTask(this, request.task));
+            if (request.task) queue.add(() => new JudgeTask(this, request.task).handle().catch((e) => log.error(e)));
         });
         this.ws.on('close', (data, reason) => {
             log.warn(`[${this.config.host}] Websocket 断开:`, data, reason.toString());
@@ -222,7 +222,7 @@ export default class Hydro {
         }
     }
 
-    async retry(queue: Queue<any>) {
+    async retry(queue: PQueue) {
         this.consume(queue).catch(() => {
             setTimeout(() => this.retry(queue), 30000);
         });

packages/hydrojudge/src/utils.ts

@@ -1,7 +1,5 @@
-import { EventEmitter } from 'events';
 import path from 'path';
 import fs from 'fs-extra';
-import _ from 'lodash';
 import { parse } from 'shell-quote';
 import { sleep } from '@hydrooj/utils/lib/utils';
 import { FormatError } from './error';
@@ -15,34 +13,6 @@ export function parseFilename(filePath: string) {
     return t[t.length - 1];
 }
 
-export class Queue<T> extends EventEmitter {
-    queue: T[] = [];
-    waiting: any[] = [];
-
-    get(count = 1) {
-        if (this.queue.length < count) {
-            return new Promise<T[]>((resolve) => {
-                this.waiting.push({ count, resolve });
-            });
-        }
-        const items = [];
-        for (let i = 0; i < count; i++) items.push(this.queue[i]);
-        this.queue = _.drop(this.queue, count);
-        return items as T[];
-    }
-
-    push(value: T) {
-        this.queue.push(value);
-        if (this.waiting.length && this.waiting[0].count <= this.queue.length) {
-            const items = [];
-            for (let i = 0; i < this.waiting[0].count; i++) items.push(this.queue[i]);
-            this.queue = _.drop(this.queue, this.waiting[0].count);
-            this.waiting[0].resolve(items);
-            this.waiting.shift();
-        }
-    }
-}
-
 export namespace Lock {
     const data = {};