src/worker/worker-options.ts

   1 /**
   2  * Enumeration of kill behaviors.
   3  */
   4 export const KillBehaviors: Readonly<{ SOFT: 'SOFT', HARD: 'HARD' }> =
   5   Object.freeze({
   6     /**
   7      * If `currentTime - lastActiveTime` is greater than `maxInactiveTime` but the worker is stealing tasks or a task is executing or queued, then the worker **wont** be deleted.
   8      */
   9     SOFT: 'SOFT',
  10     /**
  11      * If `currentTime - lastActiveTime` is greater than `maxInactiveTime` but the worker is stealing tasks or a task is executing or queued, then the worker will be deleted.
  12      */
  13     HARD: 'HARD'
  14   } as const)
  15
  16 /**
  17  * Kill behavior.
  18  */
  19 export type KillBehavior = keyof typeof KillBehaviors
  20
  21 /**
  22  * Handler called when a worker is killed.
  23  */
  24 export type KillHandler = () => void | Promise<void>
  25
  26 /**
  27  * Options for workers.
  28  */
  29 export interface WorkerOptions {
  30   /**
  31    * `killBehavior` dictates if your worker will be deleted in case a task is active on it.
  32    *
  33    * - SOFT: If `currentTime - lastActiveTime` is greater than `maxInactiveTime` but the worker is stealing tasks or a task is executing or queued, then the worker **won't** be deleted.
  34    * - HARD: If `currentTime - lastActiveTime` is greater than `maxInactiveTime` but the worker is stealing tasks or a task is executing or queued, then the worker will be deleted.
  35    *
  36    * This option only apply to the newly created workers.
  37    *
  38    * @defaultValue KillBehaviors.SOFT
  39    */
  40   killBehavior?: KillBehavior
  41   /**
  42    * Maximum waiting time in milliseconds for tasks on newly created workers. It must be greater or equal than 5.
  43    *
  44    * After this time, newly created workers will be terminated.
  45    * The last active time of your worker will be updated when it terminates a task.
  46    *
  47    * - If `killBehavior` is set to `KillBehaviors.HARD` this value represents also the timeout for the tasks that you submit to the pool,
  48    *   when this timeout expires your tasks is interrupted before completion and removed. The worker is killed if is not part of the minimum size of the pool.
  49    * - If `killBehavior` is set to `KillBehaviors.SOFT` your tasks have no timeout and your workers will not be terminated until your task is completed.
  50    *
  51    * @defaultValue 60000
  52    */
  53   maxInactiveTime?: number
  54   /**
  55    * The function to call when a worker is killed.
  56    *
  57    * @defaultValue `() => {}`
  58    */
  59   killHandler?: KillHandler
  60 }