| 1 | /** |
| 2 | * Callback invoked if the worker has received a message. |
| 3 | */ |
| 4 | export type MessageHandler<Worker> = (this: Worker, m: unknown) => void |
| 5 | |
| 6 | /** |
| 7 | * Callback invoked if the worker raised an error. |
| 8 | */ |
| 9 | export type ErrorHandler<Worker> = (this: Worker, e: Error) => void |
| 10 | |
| 11 | /** |
| 12 | * Callback invoked when the worker has started successfully. |
| 13 | */ |
| 14 | export type OnlineHandler<Worker> = (this: Worker) => void |
| 15 | |
| 16 | /** |
| 17 | * Callback invoked when the worker exits successfully. |
| 18 | */ |
| 19 | export type ExitHandler<Worker> = (this: Worker, code: number) => void |
| 20 | |
| 21 | /** |
| 22 | * Interface that describes the minimum required implementation of listener events for a pool worker. |
| 23 | */ |
| 24 | export interface IPoolWorker { |
| 25 | /** |
| 26 | * Register an event listener. |
| 27 | * |
| 28 | * @param event - The event. |
| 29 | * @param handler - The event listener. |
| 30 | */ |
| 31 | on: ((event: 'message', handler: MessageHandler<this>) => void) & |
| 32 | ((event: 'error', handler: ErrorHandler<this>) => void) & |
| 33 | ((event: 'online', handler: OnlineHandler<this>) => void) & |
| 34 | ((event: 'exit', handler: ExitHandler<this>) => void) |
| 35 | /** |
| 36 | * Register a listener to the exit event that will only performed once. |
| 37 | * |
| 38 | * @param event - `'exit'`. |
| 39 | * @param handler - The exit handler. |
| 40 | */ |
| 41 | once: (event: 'exit', handler: ExitHandler<this>) => void |
| 42 | } |