From: Jérôme Benoit Date: Thu, 10 Aug 2023 22:30:32 +0000 (+0200) Subject: feat: add HTTP server pool example: express request handler pool X-Git-Tag: v2.6.23~14 X-Git-Url: https://git.piment-noir.org/?a=commitdiff_plain;h=fac9ce963c96879918d8855c7bbed637dfcd54ff;p=poolifier.git feat: add HTTP server pool example: express request handler pool Reference: #790 Signed-off-by: Jérôme Benoit --- diff --git a/README.md b/README.md index 256bd34e..546cb9ae 100644 --- a/README.md +++ b/README.md @@ -146,6 +146,8 @@ You can do the same with the classes _ClusterWorker_, _FixedClusterPool_ and _Dy - [Javascript](./examples/javascript/) - [Typescript](./examples/typescript/) - [HTTP client pool](./examples/typescript/http-client-pool/) + - [HTTP server pool](./examples/typescript/http-server-pool/) + - [Express](./examples/typescript/http-server-pool/express/) Remember that workers can only send and receive structured-cloneable data. diff --git a/examples/typescript/http-client-pool/src/pool.ts b/examples/typescript/http-client-pool/src/pool.ts index 139f3fb9..f1306adf 100644 --- a/examples/typescript/http-client-pool/src/pool.ts +++ b/examples/typescript/http-client-pool/src/pool.ts @@ -1,6 +1,6 @@ import { fileURLToPath } from 'node:url' import { dirname, extname, join } from 'node:path' -import { FixedThreadPool, availableParallelism } from 'poolifier' +import { DynamicThreadPool, availableParallelism } from 'poolifier' import { type WorkerData, type WorkerResponse } from './types.js' const workerFile = join( @@ -8,7 +8,8 @@ const workerFile = join( `worker${extname(fileURLToPath(import.meta.url))}` ) -export const httpClientPool = new FixedThreadPool( +export const httpClientPool = new DynamicThreadPool( + 1, availableParallelism(), workerFile, { diff --git a/examples/typescript/http-client-pool/src/worker.ts b/examples/typescript/http-client-pool/src/worker.ts index 3e4c6dd5..4dc3a6a9 100644 --- a/examples/typescript/http-client-pool/src/worker.ts +++ b/examples/typescript/http-client-pool/src/worker.ts @@ -44,6 +44,4 @@ class HttpClientWorker extends ThreadWorker { } } -const httpClientWorker = new HttpClientWorker() - -export { httpClientWorker } +export const httpClientWorker = new HttpClientWorker() diff --git a/examples/typescript/http-server-pool/express/package.json b/examples/typescript/http-server-pool/express/package.json new file mode 100644 index 00000000..09f225ab --- /dev/null +++ b/examples/typescript/http-server-pool/express/package.json @@ -0,0 +1,30 @@ +{ + "$schema": "https://json.schemastore.org/package", + "name": "express-request-pool", + "version": "1.0.0", + "description": "Express request pool", + "main": "dist/main.js", + "type": "module", + "volta": { + "node": "20.5.0", + "pnpm": "8.6.12" + }, + "scripts": { + "build": "pnpm build:clean && tsc", + "build:clean": "tsc --build --clean", + "start": "node dist/main.js", + "test": "echo \"Error: no test specified\" && exit 1" + }, + "keywords": [], + "author": "", + "license": "ISC", + "dependencies": { + "express": "^4.18.2", + "poolifier": "^2.6.22" + }, + "devDependencies": { + "@types/express": "^4.17.17", + "@types/node": "^20.4.9", + "typescript": "^5.1.6" + } +} diff --git a/examples/typescript/http-server-pool/express/pnpm-lock.yaml b/examples/typescript/http-server-pool/express/pnpm-lock.yaml new file mode 100644 index 00000000..b1d838eb --- /dev/null +++ b/examples/typescript/http-server-pool/express/pnpm-lock.yaml @@ -0,0 +1,514 @@ +lockfileVersion: '6.0' + +settings: + autoInstallPeers: true + excludeLinksFromLockfile: false + +dependencies: + express: + specifier: ^4.18.2 + version: 4.18.2 + poolifier: + specifier: ^2.6.22 + version: 2.6.22 + +devDependencies: + '@types/express': + specifier: ^4.17.17 + version: 4.17.17 + '@types/node': + specifier: ^20.4.9 + version: 20.4.9 + typescript: + specifier: ^5.1.6 + version: 5.1.6 + +packages: + + /@types/body-parser@1.19.2: + resolution: {integrity: 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/dev/null +++ b/examples/typescript/http-server-pool/express/src/main.ts @@ -0,0 +1,34 @@ +import express, { type Express, type Request, type Response } from 'express' +import { requestHandlerPool } from './pool.js' + +/** + * The goal of this example is to show how to use the poolifier library to create a pool of workers that can handle HTTP requests. + * The request handler pool can also be used as a middleware in the express stack: application or router level. + * + * The express server is still single-threaded, but the request handler pool is multi-threaded. + */ + +const port = 8080 +const expressApp: Express = express() + +const emptyFunction = (): void => { + /* Intentional */ +} + +// Parse only JSON requests body +expressApp.use(express.json()) + +expressApp.all('/api/echo', (req: Request, res: Response) => { + requestHandlerPool + .execute({ body: req.body }, 'echo') + .then(response => { + return res.send(response.body).end() + }) + .catch(emptyFunction) +}) + +expressApp.listen(port, () => { + console.info( + `⚡️[express server]: Express server is started at http://localhost:${port}/` + ) +}) diff --git a/examples/typescript/http-server-pool/express/src/pool.ts b/examples/typescript/http-server-pool/express/src/pool.ts new file mode 100644 index 00000000..46b673a5 --- /dev/null +++ b/examples/typescript/http-server-pool/express/src/pool.ts @@ -0,0 +1,22 @@ +import { dirname, extname, join } from 'node:path' +import { fileURLToPath } from 'node:url' +import { DynamicThreadPool, availableParallelism } from 'poolifier' +import { type WorkerData, type WorkerResponse } from './types.js' + +const workerFile = join( + dirname(fileURLToPath(import.meta.url)), + `worker${extname(fileURLToPath(import.meta.url))}` +) + +export const requestHandlerPool = new DynamicThreadPool< +WorkerData, +WorkerResponse +>(1, availableParallelism(), workerFile, { + enableTasksQueue: true, + tasksQueueOptions: { + concurrency: 8 + }, + errorHandler: (e: Error) => { + console.error(e) + } +}) diff --git a/examples/typescript/http-server-pool/express/src/types.ts b/examples/typescript/http-server-pool/express/src/types.ts new file mode 100644 index 00000000..585e8723 --- /dev/null +++ b/examples/typescript/http-server-pool/express/src/types.ts @@ -0,0 +1,7 @@ +export interface WorkerData { + body: T +} + +export interface WorkerResponse { + body: T +} diff --git a/examples/typescript/http-server-pool/express/src/worker.ts b/examples/typescript/http-server-pool/express/src/worker.ts new file mode 100644 index 00000000..65fc7437 --- /dev/null +++ b/examples/typescript/http-server-pool/express/src/worker.ts @@ -0,0 +1,14 @@ +import { ThreadWorker } from 'poolifier' +import { type WorkerData, type WorkerResponse } from './types.js' + +class RequestHandlerWorker extends ThreadWorker { + public constructor () { + super({ + echo: (workerData?: WorkerData) => { + return workerData as WorkerResponse + } + }) + } +} + +export const requestHandlerWorker = new RequestHandlerWorker() diff --git a/examples/typescript/http-server-pool/express/tsconfig.json b/examples/typescript/http-server-pool/express/tsconfig.json new file mode 100644 index 00000000..82728d1c --- /dev/null +++ b/examples/typescript/http-server-pool/express/tsconfig.json @@ -0,0 +1,14 @@ +{ + "$schema": "https://json.schemastore.org/tsconfig", + "compilerOptions": { + "target": "ES2022", + "module": "ES2022", + "moduleResolution": "Node16", + "rootDir": "./src", + "outDir": "./dist", + "esModuleInterop": true, + "forceConsistentCasingInFileNames": true, + "strict": true, + "skipLibCheck": true + } +}