-import type { Worker } from 'cluster'
-import type { MessagePort } from 'worker_threads'
+import type { EventLoopUtilization } from 'node:perf_hooks'
+import type { MessagePort, TransferListItem } from 'node:worker_threads'
import type { KillBehavior } from './worker/worker-options'
/**
- * Make all properties in T non-readonly.
+ * Worker error.
+ *
+ * @typeParam Data - Type of data sent to the worker triggering an error. This can only be structured-cloneable data.
*/
-export type Draft<T> = { -readonly [P in keyof T]?: T[P] }
+export interface WorkerError<Data = unknown> {
+ /**
+ * Task function name triggering the error.
+ */
+ readonly name: string
+ /**
+ * Error message.
+ */
+ readonly message: string
+ /**
+ * Data triggering the error.
+ */
+ readonly data?: Data
+}
/**
- * Message object that is passed between worker and main worker.
+ * Task performance.
+ *
+ * @internal
*/
-export interface MessageValue<
- Data = unknown,
- MainWorker extends Worker | MessagePort | unknown = unknown
-> {
+export interface TaskPerformance {
+ /**
+ * Task name.
+ */
+ readonly name: string
+ /**
+ * Task performance timestamp.
+ */
+ readonly timestamp: number
+ /**
+ * Task runtime.
+ */
+ readonly runTime?: number
/**
- * Input data that will be passed to the worker.
+ * Task event loop utilization.
+ */
+ readonly elu?: EventLoopUtilization
+}
+
+/**
+ * Worker task performance statistics computation settings.
+ *
+ * @internal
+ */
+export interface WorkerStatistics {
+ /**
+ * Whether the worker computes the task runtime or not.
+ */
+ readonly runTime: boolean
+ /**
+ * Whether the worker computes the task event loop utilization (ELU) or not.
+ */
+ readonly elu: boolean
+}
+
+/**
+ * Message object that is passed as a task between main worker and worker.
+ *
+ * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data.
+ * @internal
+ */
+export interface Task<Data = unknown> {
+ /**
+ * Worker id.
+ */
+ readonly workerId?: number
+ /**
+ * Task name.
+ */
+ readonly name?: string
+ /**
+ * Task input data that will be passed to the worker.
*/
readonly data?: Data
/**
- * ID of the message.
+ * Array of transferable objects.
+ */
+ readonly transferList?: TransferListItem[]
+ /**
+ * Timestamp.
*/
- readonly id?: number
+ readonly timestamp?: number
+ /**
+ * Task UUID.
+ */
+ readonly taskId?: string
+}
+
+/**
+ * Message object that is passed between main worker and worker.
+ *
+ * @typeParam Data - Type of data sent to the worker or execution response. This can only be structured-cloneable data.
+ * @typeParam ErrorData - Type of data sent to the worker triggering an error. This can only be structured-cloneable data.
+ * @internal
+ */
+export interface MessageValue<Data = unknown, ErrorData = unknown>
+ extends Task<Data> {
/**
* Kill code.
*/
- readonly kill?: KillBehavior | 1
+ readonly kill?: KillBehavior | true | 'success' | 'failure'
+ /**
+ * Worker error.
+ */
+ readonly workerError?: WorkerError<ErrorData>
+ /**
+ * Task performance.
+ */
+ readonly taskPerformance?: TaskPerformance
+ /**
+ * Task function operation:
+ * - `'add'` - Add a task function.
+ * - `'delete'` - Delete a task function.
+ * - `'default'` - Set a task function as default.
+ */
+ readonly taskFunctionOperation?: 'add' | 'remove' | 'default'
+ /**
+ * Whether the task function operation is successful or not.
+ */
+ readonly taskFunctionOperationStatus?: boolean
+ /**
+ * Task function serialized to string.
+ */
+ readonly taskFunction?: string
+ /**
+ * Task function name.
+ */
+ readonly taskFunctionName?: string
/**
- * Error.
+ * Task function names.
*/
- readonly error?: string
+ readonly taskFunctionNames?: string[]
/**
- * Reference to main worker.
- *
- * _Only for internal use_
+ * Whether the worker computes the given statistics or not.
*/
- readonly parent?: MainWorker
+ readonly statistics?: WorkerStatistics
+ /**
+ * Whether the worker is ready or not.
+ */
+ readonly ready?: boolean
+ /**
+ * Whether the worker starts or stops its activity check.
+ */
+ readonly checkActive?: boolean
+ /**
+ * Message port.
+ */
+ readonly port?: MessagePort
}
+
+/**
+ * An object holding the task execution response promise resolve/reject callbacks.
+ *
+ * @typeParam Response - Type of execution response. This can only be structured-cloneable data.
+ * @internal
+ */
+export interface PromiseResponseWrapper<Response = unknown> {
+ /**
+ * Resolve callback to fulfill the promise.
+ */
+ readonly resolve: (value: Response | PromiseLike<Response>) => void
+ /**
+ * Reject callback to reject the promise.
+ */
+ readonly reject: (reason?: unknown) => void
+ /**
+ * The worker node key executing the task.
+ */
+ readonly workerNodeKey: number
+}
+
+export type Writable<T> = { -readonly [P in keyof T]: T[P] }