| 1 | import { |
| 2 | ClusterWorker, |
| 3 | DynamicThreadPool, |
| 4 | availableParallelism |
| 5 | } from 'poolifier' |
| 6 | import { type RawData, WebSocketServer } from 'ws' |
| 7 | import { |
| 8 | type ClusterWorkerData, |
| 9 | type ClusterWorkerResponse, |
| 10 | type DataPayload, |
| 11 | type MessagePayload, |
| 12 | MessageType, |
| 13 | type ThreadWorkerData, |
| 14 | type ThreadWorkerResponse |
| 15 | } from './types.js' |
| 16 | |
| 17 | const emptyFunction = (): void => { |
| 18 | /* Intentional */ |
| 19 | } |
| 20 | |
| 21 | class WebSocketServerWorker extends ClusterWorker< |
| 22 | ClusterWorkerData, |
| 23 | ClusterWorkerResponse |
| 24 | > { |
| 25 | private static wss: WebSocketServer |
| 26 | private static requestHandlerPool: DynamicThreadPool< |
| 27 | ThreadWorkerData<DataPayload>, |
| 28 | ThreadWorkerResponse<DataPayload> |
| 29 | > |
| 30 | |
| 31 | private static readonly startWebSocketServer = ( |
| 32 | workerData?: ClusterWorkerData |
| 33 | ): ClusterWorkerResponse => { |
| 34 | const { port, workerFile, minWorkers, maxWorkers, ...poolOptions } = |
| 35 | workerData as ClusterWorkerData |
| 36 | |
| 37 | WebSocketServerWorker.requestHandlerPool = new DynamicThreadPool< |
| 38 | ThreadWorkerData<DataPayload>, |
| 39 | ThreadWorkerResponse<DataPayload> |
| 40 | >( |
| 41 | minWorkers ?? 1, |
| 42 | maxWorkers ?? availableParallelism(), |
| 43 | workerFile, |
| 44 | poolOptions |
| 45 | ) |
| 46 | |
| 47 | WebSocketServerWorker.wss = new WebSocketServer({ port }, () => { |
| 48 | console.info( |
| 49 | `⚡️[ws server]: WebSocket server is started in cluster worker at ws://localhost:${port}/` |
| 50 | ) |
| 51 | }) |
| 52 | |
| 53 | WebSocketServerWorker.wss.on('connection', ws => { |
| 54 | ws.on('error', console.error) |
| 55 | ws.on('message', (message: RawData) => { |
| 56 | const { type, data } = JSON.parse( |
| 57 | // eslint-disable-next-line @typescript-eslint/no-base-to-string |
| 58 | message.toString() |
| 59 | ) as MessagePayload<DataPayload> |
| 60 | switch (type) { |
| 61 | case MessageType.echo: |
| 62 | WebSocketServerWorker.requestHandlerPool |
| 63 | .execute({ data }, 'echo') |
| 64 | .then(response => { |
| 65 | ws.send( |
| 66 | JSON.stringify({ |
| 67 | type: MessageType.echo, |
| 68 | data: response.data |
| 69 | }) |
| 70 | ) |
| 71 | return undefined |
| 72 | }) |
| 73 | .catch(emptyFunction) |
| 74 | break |
| 75 | case MessageType.factorial: |
| 76 | WebSocketServerWorker.requestHandlerPool |
| 77 | .execute({ data }, 'factorial') |
| 78 | .then(response => { |
| 79 | ws.send( |
| 80 | JSON.stringify({ |
| 81 | type: MessageType.factorial, |
| 82 | data: response.data |
| 83 | }) |
| 84 | ) |
| 85 | return undefined |
| 86 | }) |
| 87 | .catch(emptyFunction) |
| 88 | break |
| 89 | } |
| 90 | }) |
| 91 | }) |
| 92 | return { |
| 93 | status: true, |
| 94 | port: WebSocketServerWorker.wss.options.port |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | public constructor () { |
| 99 | super(WebSocketServerWorker.startWebSocketServer, { |
| 100 | killHandler: async () => { |
| 101 | await WebSocketServerWorker.requestHandlerPool.destroy() |
| 102 | WebSocketServerWorker.wss.close() |
| 103 | } |
| 104 | }) |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | export const webSocketServerWorker = new WebSocketServerWorker() |