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| import { isMainThread, Worker, workerData } from "node:worker_threads"; | |
| import { connectAsync } from "mqtt"; | |
| import { once } from "node:events"; | |
| const WORKER_COUNT = 100; | |
| const MSG_PER_WORKER = 500; | |
| const LISTENER_QOS = 1; | |
| const FLOODER_QOS = 1; | |
| async function runFloodWorker() { | |
| const { id } = workerData; | |
| const mqtt = await connectAsync(); | |
| mqtt.on("offline", () => console.error(`Client ${id} is offline!`)); | |
| mqtt.on("error", e => console.error(e)); | |
| await Promise.allSettled( | |
| Array.from({ length: MSG_PER_WORKER }).map((_, index) => | |
| mqtt.publishAsync( | |
| `machine/${id}/test`, | |
| JSON.stringify({ value: index }), | |
| { qos: FLOODER_QOS }, | |
| ), | |
| ), | |
| ); | |
| await mqtt.endAsync(); | |
| } | |
| async function runFloodListener() { | |
| const fileUrl = new URL(import.meta.url); | |
| const mqtt = await connectAsync({ | |
| connectTimeout: 1000, | |
| }); | |
| console.info("Connected to broker"); | |
| const stats = {}; | |
| mqtt.on("offline", () => console.error(`Client master is offline!`)); | |
| mqtt.on("error", e => console.error(e)); | |
| mqtt.on("message", (topic, payload, pkt) => { | |
| const [, machineId] = topic.match(/machine\/([^\/]+)/); | |
| stats[machineId] ??= new Set(); | |
| const { value } = JSON.parse(payload.toString()); | |
| stats[machineId].add(value); | |
| }); | |
| await mqtt.subscribeAsync(`machine/+/test`, { qos: LISTENER_QOS }); | |
| console.info("Subscribed to topic"); | |
| const workers = Array.from({ length: WORKER_COUNT }).map((_, index) => { | |
| const workerData = { id: index }; | |
| return new Worker(fileUrl, { workerData }); | |
| }); | |
| console.info(`Spawned ${workers.length} workers`); | |
| await Promise.allSettled(workers.map(w => once(w, "exit"))); | |
| console.info("All workers are done"); | |
| console.table( | |
| Object.entries(stats).map(([workerId, msgIds]) => ({ | |
| worker: workerId, | |
| count: msgIds.size, | |
| })), | |
| ); | |
| await mqtt.endAsync(); | |
| } | |
| if (isMainThread) runFloodListener(); | |
| else runFloodWorker(); |
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