+/**
+ * Enumeration of kill behaviors.
+ */
+export const KillBehaviors = Object.freeze({
+ /**
+ * If `currentTime - lastActiveTime` is greater than `maxInactiveTime` but a task is still running, then the worker **wont** be deleted.
+ */
+ SOFT: 'SOFT',
+ /**
+ * If `currentTime - lastActiveTime` is greater than `maxInactiveTime` but a task is still running, then the worker will be deleted.
+ */
+ HARD: 'HARD'
+} as const)
+
+/**
+ * Kill behavior.
+ */
+export type KillBehavior = keyof typeof KillBehaviors
+
+/**
+ * Detects whether the given value is a kill behavior or not.
+ *
+ * @typeParam KB - Which specific KillBehavior type to test against.
+ * @param killBehavior - Which kind of kill behavior to detect.
+ * @param value - Any value.
+ * @returns `true` if `value` was strictly equals to `killBehavior`, otherwise `false`.
+ */
+export function isKillBehavior<KB extends KillBehavior> (
+ killBehavior: KB,
+ value: unknown
+): value is KB {
+ return value === killBehavior
+}
+
+/**
+ * Options for workers.
+ */
export interface WorkerOptions {
/**
- * Max time to wait tasks to work on (in ms), after this period the new worker threads will die.
+ * Maximum waiting time in milliseconds for tasks.
+ *
+ * After this time, newly created workers will be terminated.
+ * The last active time of your worker unit will be updated when a task is submitted to a worker or when a worker terminate a task.
*
- * @default 60.000 ms
+ * - If `killBehavior` is set to `KillBehaviors.HARD` this value represents also the timeout for the tasks that you submit to the pool,
+ * when this timeout expires your tasks is interrupted and the worker is killed if is not part of the minimum size of the pool.
+ * - If `killBehavior` is set to `KillBehaviors.SOFT` your tasks have no timeout and your workers will not be terminated until your task is completed.
+ *
+ * @defaultValue 60000
*/
maxInactiveTime?: number
/**
- * `true` if your function contains async pieces, else `false`.
+ * Whether your worker will perform asynchronous or not.
*
- * @default false
+ * @defaultValue false
+ * @deprecated This option will be removed in the next major version.
*/
async?: boolean
+ /**
+ * `killBehavior` dictates if your async unit (worker/process) will be deleted in case that a task is active on it.
+ *
+ * - SOFT: If `currentTime - lastActiveTime` is greater than `maxInactiveTime` but a task is still running, then the worker **won't** be deleted.
+ * - HARD: If `currentTime - lastActiveTime` is greater than `maxInactiveTime` but a task is still running, then the worker will be deleted.
+ *
+ * This option only apply to the newly created workers.
+ *
+ * @defaultValue KillBehaviors.SOFT
+ */
+ killBehavior?: KillBehavior
}