|
| 1 | +'use strict'; |
| 2 | + |
| 3 | +const common = require('../common'); |
| 4 | +const cluster = require('cluster'); |
| 5 | +const assert = require('assert'); |
| 6 | + |
| 7 | +const acts = { |
| 8 | + WORKER1_SERVER1_CLOSED: { cmd: 'WORKER1_SERVER1_CLOSED' }, |
| 9 | + WORKER2_SERVER1_STARTED: { cmd: 'WORKER2_SERVER1_STARTED' }, |
| 10 | + WORKER1_SERVER2_CLOSED: { cmd: 'WORKER1_SERVER2_CLOSED' }, |
| 11 | +}; |
| 12 | + |
| 13 | +if (cluster.isMaster) { |
| 14 | + const currentHost = '::'; |
| 15 | + const worker1 = cluster.fork({ |
| 16 | + WORKER_ID: 'worker1', |
| 17 | + HOST: currentHost, |
| 18 | + }); |
| 19 | + let worker2; |
| 20 | + worker1.on('error', common.mustNotCall()); |
| 21 | + worker1.on('message', onMessage); |
| 22 | + |
| 23 | + function createWorker2() { |
| 24 | + worker2 = cluster.fork({ |
| 25 | + WORKER_ID: 'worker2', |
| 26 | + HOST: currentHost, |
| 27 | + }); |
| 28 | + worker2.on('error', common.mustNotCall()); |
| 29 | + worker2.on('message', onMessage); |
| 30 | + } |
| 31 | + |
| 32 | + function onMessage(msg) { |
| 33 | + switch (msg.cmd) { |
| 34 | + case acts.WORKER1_SERVER1_CLOSED.cmd: |
| 35 | + createWorker2(); |
| 36 | + break; |
| 37 | + case acts.WORKER2_SERVER1_STARTED.cmd: |
| 38 | + worker1.send(acts.WORKER2_SERVER1_STARTED); |
| 39 | + break; |
| 40 | + case acts.WORKER1_SERVER2_CLOSED.cmd: |
| 41 | + worker1.kill(); |
| 42 | + worker2.kill(); |
| 43 | + break; |
| 44 | + default: |
| 45 | + assert.fail(`Unexpected message ${msg.cmd}`); |
| 46 | + } |
| 47 | + } |
| 48 | +} else { |
| 49 | + const WORKER_ID = process.env.WORKER_ID; |
| 50 | + function createServer() { |
| 51 | + return new Promise((resolve, reject) => { |
| 52 | + const net = require('net'); |
| 53 | + const PORT = 8000; |
| 54 | + const server = net |
| 55 | + .createServer((socket) => { |
| 56 | + socket.end( |
| 57 | + `Handled by worker ${process.env.WORKER_ID} (${process.pid})\n` |
| 58 | + ); |
| 59 | + }) |
| 60 | + .on('error', (e) => { |
| 61 | + reject(e); |
| 62 | + }); |
| 63 | + |
| 64 | + server.listen( |
| 65 | + { |
| 66 | + port: PORT, |
| 67 | + host: process.env.HOST, |
| 68 | + }, |
| 69 | + () => resolve(server) |
| 70 | + ); |
| 71 | + }); |
| 72 | + } |
| 73 | + (async () => { |
| 74 | + const server1 = await createServer(); |
| 75 | + if (WORKER_ID === 'worker2') { |
| 76 | + process.send(acts.WORKER2_SERVER1_STARTED); |
| 77 | + } else { |
| 78 | + await createServer().catch(common.mustCall()); |
| 79 | + await new Promise((r) => server1.close(r)); |
| 80 | + process.send(acts.WORKER1_SERVER1_CLOSED); |
| 81 | + |
| 82 | + process.on('message', async (msg) => { |
| 83 | + if (msg.cmd === acts.WORKER2_SERVER1_STARTED.cmd) { |
| 84 | + const server2 = await createServer(); |
| 85 | + await new Promise((r) => server2.close(r)); |
| 86 | + process.send(acts.WORKER1_SERVER2_CLOSED); |
| 87 | + } else { |
| 88 | + assert.fail(`Unexpected message ${msg.cmd}`); |
| 89 | + } |
| 90 | + }); |
| 91 | + } |
| 92 | + })().then(common.mustCall()); |
| 93 | +} |
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