TaskPerformance,
WorkerStatistics
} from '../utility-types'
-import { EMPTY_FUNCTION, isPlainObject } from '../utils'
+import { EMPTY_FUNCTION, isAsyncFunction, isPlainObject } from '../utils'
import {
type KillBehavior,
KillBehaviors,
Response = unknown
> extends AsyncResource {
/**
- * Worker Id.
+ * Worker id.
*/
protected abstract id: number
/**
/**
* Handler id of the `aliveInterval` worker alive check.
*/
- protected readonly aliveInterval?: NodeJS.Timeout
+ protected aliveInterval?: NodeJS.Timeout
/**
* Constructs a new poolifier worker.
*
this.checkWorkerOptions(this.opts)
this.checkTaskFunctions(taskFunctions)
if (!this.isMain) {
- this.lastTaskTimestamp = performance.now()
- this.aliveInterval = setInterval(
- this.checkAlive.bind(this),
- (this.opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME) / 2
- )
- this.checkAlive.bind(this)()
this.mainWorker?.on('message', this.messageListener.bind(this))
}
}
* @param message - Message received.
*/
protected messageListener (message: MessageValue<Data, Data>): void {
- if (message.id != null && message.data != null) {
+ if (message.ready != null && message.workerId === this.id) {
+ // Startup message received
+ this.workerReady()
+ } else if (message.statistics != null && message.workerId === this.id) {
+ // Statistics message received
+ this.statistics = message.statistics
+ } else if (message.checkAlive != null && message.workerId === this.id) {
+ // Check alive message received
+ message.checkAlive ? this.startCheckAlive() : this.stopCheckAlive()
+ } else if (
+ message.id != null &&
+ message.data != null &&
+ message.workerId === this.id
+ ) {
// Task message received
const fn = this.getTaskFunction(message.name)
- if (fn?.constructor.name === 'AsyncFunction') {
+ if (isAsyncFunction(fn)) {
this.runInAsyncScope(this.runAsync.bind(this), this, fn, message)
} else {
this.runInAsyncScope(this.runSync.bind(this), this, fn, message)
}
- } else if (message.statistics != null) {
- // Statistics message received
- this.statistics = message.statistics
- } else if (message.kill != null) {
+ } else if (message.kill === true && message.workerId === this.id) {
// Kill message received
- this.aliveInterval != null && clearInterval(this.aliveInterval)
+ this.stopCheckAlive()
this.emitDestroy()
}
}
+ /**
+ * Notifies the main worker that this worker is ready to process tasks.
+ */
+ protected workerReady (): void {
+ !this.isMain && this.sendToMainWorker({ ready: true, workerId: this.id })
+ }
+
+ /**
+ * Starts the worker alive check interval.
+ */
+ private startCheckAlive (): void {
+ this.lastTaskTimestamp = performance.now()
+ this.aliveInterval = setInterval(
+ this.checkAlive.bind(this),
+ (this.opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME) / 2
+ )
+ this.checkAlive.bind(this)()
+ }
+
+ /**
+ * Stops the worker alive check interval.
+ */
+ private stopCheckAlive (): void {
+ this.aliveInterval != null && clearInterval(this.aliveInterval)
+ }
+
+ /**
+ * Checks if the worker should be terminated, because its living too long.
+ */
+ private checkAlive (): void {
+ if (
+ performance.now() - this.lastTaskTimestamp >
+ (this.opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME)
+ ) {
+ this.sendToMainWorker({ kill: this.opts.killBehavior, workerId: this.id })
+ }
+ }
+
/**
* Returns the main worker.
*
message: MessageValue<Response, Data>
): void
- /**
- * Checks if the worker should be terminated, because its living too long.
- */
- protected checkAlive (): void {
- if (
- performance.now() - this.lastTaskTimestamp >
- (this.opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME)
- ) {
- this.sendToMainWorker({ kill: this.opts.killBehavior })
- }
- }
-
/**
* Handles an error and convert it to a string so it can be sent back to the main worker.
*
* @param e - The error raised by the worker.
- * @returns Message of the error.
+ * @returns The error message.
*/
protected handleError (e: Error | string): string {
- return e as string
+ return e instanceof Error ? e.message : e
}
/**
id: message.id
})
} catch (e) {
- const err = this.handleError(e as Error)
+ const errorMessage = this.handleError(e as Error | string)
this.sendToMainWorker({
taskError: {
- message: err,
+ message: errorMessage,
data: message.data
},
workerId: this.id,
id: message.id
})
} finally {
- !this.isMain && (this.lastTaskTimestamp = performance.now())
+ if (!this.isMain && this.aliveInterval != null) {
+ this.lastTaskTimestamp = performance.now()
+ }
}
}
return null
})
.catch(e => {
- const err = this.handleError(e as Error)
+ const errorMessage = this.handleError(e as Error | string)
this.sendToMainWorker({
taskError: {
- message: err,
+ message: errorMessage,
data: message.data
},
workerId: this.id,
})
})
.finally(() => {
- !this.isMain && (this.lastTaskTimestamp = performance.now())
+ if (!this.isMain && this.aliveInterval != null) {
+ this.lastTaskTimestamp = performance.now()
+ }
})
.catch(EMPTY_FUNCTION)
}