examples/typescript/http-server-pool/fastify-cluster/src/main.ts

   1 import { dirname, extname, join } from 'node:path'
   2 import { fileURLToPath } from 'node:url'
   3 import { FixedClusterPool, availableParallelism } from 'poolifier'
   4 import type { WorkerData, WorkerResponse } from './types.js'
   5
   6 const workerFile = join(
   7   dirname(fileURLToPath(import.meta.url)),
   8   `worker${extname(fileURLToPath(import.meta.url))}`
   9 )
  10
  11 const pool = new FixedClusterPool<WorkerData, WorkerResponse>(
  12   availableParallelism(),
  13   workerFile,
  14   {
  15     errorHandler: (e: Error) => {
  16       console.error(e)
  17     }
  18   }
  19 )
  20
  21 // Start one fastify instance per cluster worker in the pool
  22 for (let i = 1; i <= pool.info.maxSize; i++) {
  23   pool
  24     .execute({ port: 8080 })
  25     .then(response => {
  26       if (response.status) {
  27         console.info(
  28           // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
  29           `Fastify is listening on worker ${i} on port ${response.port}`
  30         )
  31       } else {
  32         console.error(`Fastify failed to start on worker ${i}:`, response.error)
  33       }
  34       return null
  35     })
  36     .catch(error => {
  37       console.error(error)
  38     })
  39 }