src/utility-types.ts

   1 import type { Worker as ClusterWorker } from 'node:cluster'
   2 import type { MessagePort } from 'node:worker_threads'
   3 import type { KillBehavior } from './worker/worker-options'
   4 import type { IPoolWorker } from './pools/pool-worker'
   5
   6 /**
   7  * Make all properties in T non-readonly.
   8  */
   9 export type Draft<T> = { -readonly [P in keyof T]?: T[P] }
  10
  11 /**
  12  * Message object that is passed between worker and main worker.
  13  */
  14 export interface MessageValue<
  15   Data = unknown,
  16   MainWorker extends ClusterWorker | MessagePort | unknown = unknown
  17 > {
  18   /**
  19    * Input data that will be passed to the worker.
  20    */
  21   readonly data?: Data
  22   /**
  23    * Id of the message.
  24    */
  25   readonly id?: string
  26   /**
  27    * Kill code.
  28    */
  29   readonly kill?: KillBehavior | 1
  30   /**
  31    * Error.
  32    */
  33   readonly error?: string
  34   /**
  35    * Task runtime.
  36    */
  37   readonly taskRunTime?: number
  38   /**
  39    * Reference to main worker.
  40    *
  41    * Only for internal use.
  42    */
  43   readonly parent?: MainWorker
  44 }
  45
  46 /**
  47  * An object holding the execution response promise resolve/reject callbacks.
  48  *
  49  * @typeParam Response - Type of execution response. This can only be serializable data.
  50  */
  51 export interface PromiseResponseWrapper<
  52   Worker extends IPoolWorker,
  53   Response = unknown
  54 > {
  55   /**
  56    * Resolve callback to fulfill the promise.
  57    */
  58   readonly resolve: (value: Response) => void
  59   /**
  60    * Reject callback to reject the promise.
  61    */
  62   readonly reject: (reason?: string) => void
  63   /**
  64    * The worker handling the promise.
  65    */
  66   readonly worker: Worker
  67 }