X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fworker%2Fabstract-worker.ts;h=ebbefc75ba4cc8c4e09bcc3073e372085466c181;hb=refs%2Fheads%2Fmaster;hp=bc62ade55ef15efac79c8c9e8835a45cb697aa40;hpb=76b178d95efa0dc23addd65ab87e94736f1ed23a;p=poolifier.git

diff --git a/src/worker/abstract-worker.ts b/src/worker/abstract-worker.ts
index bc62ade5..ebbefc75 100644
--- a/src/worker/abstract-worker.ts
+++ b/src/worker/abstract-worker.ts
@@ -1,27 +1,35 @@
-import { AsyncResource } from 'node:async_hooks'
 import type { Worker } from 'node:cluster'
-import type { MessagePort } from 'node:worker_threads'
 import { performance } from 'node:perf_hooks'
+import type { MessagePort } from 'node:worker_threads'
+
 import type {
   MessageValue,
   Task,
+  TaskFunctionProperties,
   TaskPerformance,
-  WorkerStatistics
-} from '../utility-types'
+  WorkerStatistics,
+} from '../utility-types.js'
 import {
+  buildTaskFunctionProperties,
   DEFAULT_TASK_NAME,
   EMPTY_FUNCTION,
   isAsyncFunction,
-  isPlainObject
-} from '../utils'
-import { KillBehaviors, type WorkerOptions } from './worker-options'
+  isPlainObject,
+} from '../utils.js'
 import type {
   TaskAsyncFunction,
   TaskFunction,
-  TaskFunctionOperationReturnType,
+  TaskFunctionObject,
+  TaskFunctionOperationResult,
   TaskFunctions,
-  TaskSyncFunction
-} from './task-functions'
+  TaskSyncFunction,
+} from './task-functions.js'
+import {
+  checkTaskFunctionName,
+  checkValidTaskFunctionObjectEntry,
+  checkValidWorkerOptions,
+} from './utils.js'
+import { KillBehaviors, type WorkerOptions } from './worker-options.js'
 
 const DEFAULT_MAX_INACTIVE_TIME = 60000
 const DEFAULT_WORKER_OPTIONS: WorkerOptions = {
@@ -37,12 +45,11 @@ const DEFAULT_WORKER_OPTIONS: WorkerOptions = {
   /**
    * The function to call when the worker is killed.
    */
-  killHandler: EMPTY_FUNCTION
+  killHandler: EMPTY_FUNCTION,
 }
 
 /**
  * Base class that implements some shared logic for all poolifier workers.
- *
  * @typeParam MainWorker - Type of main worker.
  * @typeParam Data - Type of data this worker receives from pool's execution. This can only be structured-cloneable data.
  * @typeParam Response - Type of response the worker sends back to the main worker. This can only be structured-cloneable data.
@@ -51,15 +58,15 @@ export abstract class AbstractWorker<
   MainWorker extends Worker | MessagePort,
   Data = unknown,
   Response = unknown
-> extends AsyncResource {
+> {
   /**
    * Worker id.
    */
   protected abstract id: number
   /**
-   * Task function(s) processed by the worker when the pool's `execution` function is invoked.
+   * Task function object(s) processed by the worker when the pool's `execution` function is invoked.
    */
-  protected taskFunctions!: Map<string, TaskFunction<Data, Response>>
+  protected taskFunctions!: Map<string, TaskFunctionObject<Data, Response>>
   /**
    * Timestamp of the last task processed by this worker.
    */
@@ -67,123 +74,81 @@ export abstract class AbstractWorker<
   /**
    * Performance statistics computation requirements.
    */
-  protected statistics!: WorkerStatistics
+  protected statistics?: WorkerStatistics
   /**
    * Handler id of the `activeInterval` worker activity check.
    */
   protected activeInterval?: NodeJS.Timeout
+
   /**
    * Constructs a new poolifier worker.
-   *
-   * @param type - The type of async event.
    * @param isMain - Whether this is the main worker or not.
    * @param mainWorker - Reference to main worker.
    * @param taskFunctions - Task function(s) processed by the worker when the pool's `execution` function is invoked. The first function is the default function.
    * @param opts - Options for the worker.
    */
   public constructor (
-    type: string,
-    protected readonly isMain: boolean,
-    private readonly mainWorker: MainWorker,
+    protected readonly isMain: boolean | undefined,
+    private readonly mainWorker: MainWorker | undefined | null,
     taskFunctions: TaskFunction<Data, Response> | TaskFunctions<Data, Response>,
     protected opts: WorkerOptions = DEFAULT_WORKER_OPTIONS
   ) {
-    super(type)
     if (this.isMain == null) {
       throw new Error('isMain parameter is mandatory')
     }
     this.checkTaskFunctions(taskFunctions)
     this.checkWorkerOptions(this.opts)
     if (!this.isMain) {
+      // Should be once() but Node.js on windows has a bug that prevents it from working
       this.getMainWorker().on('message', this.handleReadyMessage.bind(this))
     }
   }
 
   private checkWorkerOptions (opts: WorkerOptions): void {
-    if (opts != null && !isPlainObject(opts)) {
-      throw new TypeError('opts worker options parameter is not a plain object')
-    }
-    if (
-      opts?.killBehavior != null &&
-      !Object.values(KillBehaviors).includes(opts.killBehavior)
-    ) {
-      throw new TypeError(
-        `killBehavior option '${opts.killBehavior}' is not valid`
-      )
-    }
-    if (
-      opts?.maxInactiveTime != null &&
-      !Number.isSafeInteger(opts.maxInactiveTime)
-    ) {
-      throw new TypeError('maxInactiveTime option is not an integer')
-    }
-    if (opts?.maxInactiveTime != null && opts.maxInactiveTime < 5) {
-      throw new TypeError(
-        'maxInactiveTime option is not a positive integer greater or equal than 5'
-      )
-    }
-    if (opts?.killHandler != null && typeof opts.killHandler !== 'function') {
-      throw new TypeError('killHandler option is not a function')
-    }
-    if (opts?.async != null) {
-      throw new Error('async option is deprecated')
-    }
+    checkValidWorkerOptions(opts)
     this.opts = { ...DEFAULT_WORKER_OPTIONS, ...opts }
   }
 
-  private checkValidTaskFunctionEntry (
-    name: string,
-    fn: TaskFunction<Data, Response>
-  ): void {
-    if (typeof name !== 'string') {
-      throw new TypeError(
-        'A taskFunctions parameter object key is not a string'
-      )
-    }
-    if (typeof name === 'string' && name.trim().length === 0) {
-      throw new TypeError(
-        'A taskFunctions parameter object key is an empty string'
-      )
-    }
-    if (typeof fn !== 'function') {
-      throw new TypeError(
-        'A taskFunctions parameter object value is not a function'
-      )
-    }
-  }
-
   /**
    * Checks if the `taskFunctions` parameter is passed to the constructor and valid.
-   *
    * @param taskFunctions - The task function(s) parameter that should be checked.
    */
   private checkTaskFunctions (
-    taskFunctions: TaskFunction<Data, Response> | TaskFunctions<Data, Response>
+    taskFunctions:
+      | TaskFunction<Data, Response>
+      | TaskFunctions<Data, Response>
+      | undefined
   ): void {
     if (taskFunctions == null) {
       throw new Error('taskFunctions parameter is mandatory')
     }
-    this.taskFunctions = new Map<string, TaskFunction<Data, Response>>()
+    this.taskFunctions = new Map<string, TaskFunctionObject<Data, Response>>()
     if (typeof taskFunctions === 'function') {
-      const boundFn = taskFunctions.bind(this)
-      this.taskFunctions.set(DEFAULT_TASK_NAME, boundFn)
+      const fnObj = { taskFunction: taskFunctions.bind(this) }
+      this.taskFunctions.set(DEFAULT_TASK_NAME, fnObj)
       this.taskFunctions.set(
         typeof taskFunctions.name === 'string' &&
-        taskFunctions.name.trim().length > 0
+          taskFunctions.name.trim().length > 0
           ? taskFunctions.name
           : 'fn1',
-        boundFn
+        fnObj
       )
     } else if (isPlainObject(taskFunctions)) {
       let firstEntry = true
-      for (const [name, fn] of Object.entries(taskFunctions)) {
-        this.checkValidTaskFunctionEntry(name, fn)
-        const boundFn = fn.bind(this)
+      for (let [name, fnObj] of Object.entries(taskFunctions)) {
+        if (typeof fnObj === 'function') {
+          fnObj = { taskFunction: fnObj } satisfies TaskFunctionObject<
+            Data,
+            Response
+          >
+        }
+        checkValidTaskFunctionObjectEntry<Data, Response>(name, fnObj)
+        fnObj.taskFunction = fnObj.taskFunction.bind(this)
         if (firstEntry) {
-          this.taskFunctions.set(DEFAULT_TASK_NAME, boundFn)
+          this.taskFunctions.set(DEFAULT_TASK_NAME, fnObj)
           firstEntry = false
         }
-        this.taskFunctions.set(name, boundFn)
+        this.taskFunctions.set(name, fnObj)
       }
       if (firstEntry) {
         throw new Error('taskFunctions parameter object is empty')
@@ -197,13 +162,12 @@ export abstract class AbstractWorker<
 
   /**
    * Checks if the worker has a task function with the given name.
-   *
    * @param name - The name of the task function to check.
    * @returns Whether the worker has a task function with the given name or not.
    */
-  public hasTaskFunction (name: string): TaskFunctionOperationReturnType {
+  public hasTaskFunction (name: string): TaskFunctionOperationResult {
     try {
-      this.checkTaskFunctionName(name)
+      checkTaskFunctionName(name)
     } catch (error) {
       return { status: false, error: error as Error }
     }
@@ -213,34 +177,34 @@ export abstract class AbstractWorker<
   /**
    * Adds a task function to the worker.
    * If a task function with the same name already exists, it is replaced.
-   *
    * @param name - The name of the task function to add.
    * @param fn - The task function to add.
    * @returns Whether the task function was added or not.
    */
   public addTaskFunction (
     name: string,
-    fn: TaskFunction<Data, Response>
-  ): TaskFunctionOperationReturnType {
+    fn: TaskFunction<Data, Response> | TaskFunctionObject<Data, Response>
+  ): TaskFunctionOperationResult {
     try {
-      this.checkTaskFunctionName(name)
+      checkTaskFunctionName(name)
       if (name === DEFAULT_TASK_NAME) {
         throw new Error(
           'Cannot add a task function with the default reserved name'
         )
       }
-      if (typeof fn !== 'function') {
-        throw new TypeError('fn parameter is not a function')
+      if (typeof fn === 'function') {
+        fn = { taskFunction: fn } satisfies TaskFunctionObject<Data, Response>
       }
-      const boundFn = fn.bind(this)
+      checkValidTaskFunctionObjectEntry<Data, Response>(name, fn)
+      fn.taskFunction = fn.taskFunction.bind(this)
       if (
         this.taskFunctions.get(name) ===
         this.taskFunctions.get(DEFAULT_TASK_NAME)
       ) {
-        this.taskFunctions.set(DEFAULT_TASK_NAME, boundFn)
+        this.taskFunctions.set(DEFAULT_TASK_NAME, fn)
       }
-      this.taskFunctions.set(name, boundFn)
-      this.sendTaskFunctionNamesToMainWorker()
+      this.taskFunctions.set(name, fn)
+      this.sendTaskFunctionsPropertiesToMainWorker()
       return { status: true }
     } catch (error) {
       return { status: false, error: error as Error }
@@ -249,13 +213,12 @@ export abstract class AbstractWorker<
 
   /**
    * Removes a task function from the worker.
-   *
    * @param name - The name of the task function to remove.
    * @returns Whether the task function existed and was removed or not.
    */
-  public removeTaskFunction (name: string): TaskFunctionOperationReturnType {
+  public removeTaskFunction (name: string): TaskFunctionOperationResult {
     try {
-      this.checkTaskFunctionName(name)
+      checkTaskFunctionName(name)
       if (name === DEFAULT_TASK_NAME) {
         throw new Error(
           'Cannot remove the task function with the default reserved name'
@@ -270,7 +233,7 @@ export abstract class AbstractWorker<
         )
       }
       const deleteStatus = this.taskFunctions.delete(name)
-      this.sendTaskFunctionNamesToMainWorker()
+      this.sendTaskFunctionsPropertiesToMainWorker()
       return { status: deleteStatus }
     } catch (error) {
       return { status: false, error: error as Error }
@@ -278,40 +241,48 @@ export abstract class AbstractWorker<
   }
 
   /**
-   * Lists the names of the worker's task functions.
-   *
-   * @returns The names of the worker's task functions.
+   * Lists the properties of the worker's task functions.
+   * @returns The properties of the worker's task functions.
    */
-  public listTaskFunctionNames (): string[] {
-    const names: string[] = [...this.taskFunctions.keys()]
-    let defaultTaskFunctionName: string = DEFAULT_TASK_NAME
-    for (const [name, fn] of this.taskFunctions) {
+  public listTaskFunctionsProperties (): TaskFunctionProperties[] {
+    let defaultTaskFunctionName = DEFAULT_TASK_NAME
+    for (const [name, fnObj] of this.taskFunctions) {
       if (
         name !== DEFAULT_TASK_NAME &&
-        fn === this.taskFunctions.get(DEFAULT_TASK_NAME)
+        fnObj === this.taskFunctions.get(DEFAULT_TASK_NAME)
       ) {
         defaultTaskFunctionName = name
         break
       }
     }
+    const taskFunctionsProperties: TaskFunctionProperties[] = []
+    for (const [name, fnObj] of this.taskFunctions) {
+      if (name === DEFAULT_TASK_NAME || name === defaultTaskFunctionName) {
+        continue
+      }
+      taskFunctionsProperties.push(buildTaskFunctionProperties(name, fnObj))
+    }
     return [
-      names[names.indexOf(DEFAULT_TASK_NAME)],
-      defaultTaskFunctionName,
-      ...names.filter(
-        name => name !== DEFAULT_TASK_NAME && name !== defaultTaskFunctionName
-      )
+      buildTaskFunctionProperties(
+        DEFAULT_TASK_NAME,
+        this.taskFunctions.get(DEFAULT_TASK_NAME)
+      ),
+      buildTaskFunctionProperties(
+        defaultTaskFunctionName,
+        this.taskFunctions.get(defaultTaskFunctionName)
+      ),
+      ...taskFunctionsProperties,
     ]
   }
 
   /**
    * Sets the default task function to use in the worker.
-   *
    * @param name - The name of the task function to use as default task function.
    * @returns Whether the default task function was set or not.
    */
-  public setDefaultTaskFunction (name: string): TaskFunctionOperationReturnType {
+  public setDefaultTaskFunction (name: string): TaskFunctionOperationResult {
     try {
-      this.checkTaskFunctionName(name)
+      checkTaskFunctionName(name)
       if (name === DEFAULT_TASK_NAME) {
         throw new Error(
           'Cannot set the default task function reserved name as the default task function'
@@ -322,52 +293,48 @@ export abstract class AbstractWorker<
           'Cannot set the default task function to a non-existing task function'
         )
       }
-      this.taskFunctions.set(
-        DEFAULT_TASK_NAME,
-        this.taskFunctions.get(name) as TaskFunction<Data, Response>
-      )
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+      this.taskFunctions.set(DEFAULT_TASK_NAME, this.taskFunctions.get(name)!)
+      this.sendTaskFunctionsPropertiesToMainWorker()
       return { status: true }
     } catch (error) {
       return { status: false, error: error as Error }
     }
   }
 
-  private checkTaskFunctionName (name: string): void {
-    if (typeof name !== 'string') {
-      throw new TypeError('name parameter is not a string')
-    }
-    if (typeof name === 'string' && name.trim().length === 0) {
-      throw new TypeError('name parameter is an empty string')
-    }
-  }
-
   /**
    * Handles the ready message sent by the main worker.
-   *
    * @param message - The ready message.
    */
   protected abstract handleReadyMessage (message: MessageValue<Data>): void
 
   /**
    * Worker message listener.
-   *
    * @param message - The received message.
    */
   protected messageListener (message: MessageValue<Data>): void {
     this.checkMessageWorkerId(message)
-    if (message.statistics != null) {
+    const {
+      statistics,
+      checkActive,
+      taskFunctionOperation,
+      taskId,
+      data,
+      kill,
+    } = message
+    if (statistics != null) {
       // Statistics message received
-      this.statistics = message.statistics
-    } else if (message.checkActive != null) {
+      this.statistics = statistics
+    } else if (checkActive != null) {
       // Check active message received
-      message.checkActive ? this.startCheckActive() : this.stopCheckActive()
-    } else if (message.taskFunctionOperation != null) {
+      checkActive ? this.startCheckActive() : this.stopCheckActive()
+    } else if (taskFunctionOperation != null) {
       // Task function operation message received
       this.handleTaskFunctionOperationMessage(message)
-    } else if (message.taskId != null && message.data != null) {
+    } else if (taskId != null && data != null) {
       // Task message received
       this.run(message)
-    } else if (message.kill === true) {
+    } else if (kill === true) {
       // Kill message received
       this.handleKillMessage(message)
     }
@@ -376,77 +343,91 @@ export abstract class AbstractWorker<
   protected handleTaskFunctionOperationMessage (
     message: MessageValue<Data>
   ): void {
-    const { taskFunctionOperation, taskFunction, taskFunctionName } = message
-    let response!: TaskFunctionOperationReturnType
-    if (taskFunctionOperation === 'add') {
-      response = this.addTaskFunction(
-        taskFunctionName as string,
-        // eslint-disable-next-line @typescript-eslint/no-implied-eval, no-new-func
-        new Function(`return ${taskFunction as string}`)() as TaskFunction<
-        Data,
-        Response
-        >
+    const { taskFunctionOperation, taskFunctionProperties, taskFunction } =
+      message
+    if (taskFunctionProperties == null) {
+      throw new Error(
+        'Cannot handle task function operation message without task function properties'
       )
-    } else if (taskFunctionOperation === 'remove') {
-      response = this.removeTaskFunction(taskFunctionName as string)
-    } else if (taskFunctionOperation === 'default') {
-      response = this.setDefaultTaskFunction(taskFunctionName as string)
     }
+    let response: TaskFunctionOperationResult
+    switch (taskFunctionOperation) {
+      case 'add':
+        response = this.addTaskFunction(taskFunctionProperties.name, {
+          // eslint-disable-next-line @typescript-eslint/no-implied-eval, no-new-func
+          taskFunction: new Function(
+            // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+            `return ${taskFunction!}`
+          )() as TaskFunction<Data, Response>,
+          ...(taskFunctionProperties.priority != null && {
+            priority: taskFunctionProperties.priority,
+          }),
+          ...(taskFunctionProperties.strategy != null && {
+            strategy: taskFunctionProperties.strategy,
+          }),
+        })
+        break
+      case 'remove':
+        response = this.removeTaskFunction(taskFunctionProperties.name)
+        break
+      case 'default':
+        response = this.setDefaultTaskFunction(taskFunctionProperties.name)
+        break
+      default:
+        response = { status: false, error: new Error('Unknown task operation') }
+        break
+    }
+    const { status, error } = response
     this.sendToMainWorker({
       taskFunctionOperation,
-      taskFunctionOperationStatus: response.status,
-      workerError: {
-        name: taskFunctionName as string,
-        message: this.handleError(response.error as Error | string)
-      }
+      taskFunctionOperationStatus: status,
+      taskFunctionProperties,
+      ...(!status &&
+        error != null && {
+        workerError: {
+          name: taskFunctionProperties.name,
+          message: this.handleError(error as Error | string),
+        },
+      }),
     })
   }
 
   /**
    * Handles a kill message sent by the main worker.
-   *
    * @param message - The kill message.
    */
   protected handleKillMessage (message: MessageValue<Data>): void {
     this.stopCheckActive()
     if (isAsyncFunction(this.opts.killHandler)) {
-      (this.opts.killHandler?.() as Promise<void>)
+      ;(this.opts.killHandler as () => Promise<void>)()
         .then(() => {
           this.sendToMainWorker({ kill: 'success' })
-          return null
+          return undefined
         })
         .catch(() => {
           this.sendToMainWorker({ kill: 'failure' })
         })
-        .finally(() => {
-          this.emitDestroy()
-        })
-        .catch(EMPTY_FUNCTION)
     } else {
       try {
-        // eslint-disable-next-line @typescript-eslint/no-invalid-void-type
-        this.opts.killHandler?.() as void
+        ;(this.opts.killHandler as (() => void) | undefined)?.()
         this.sendToMainWorker({ kill: 'success' })
       } catch {
         this.sendToMainWorker({ kill: 'failure' })
-      } finally {
-        this.emitDestroy()
       }
     }
   }
 
   /**
    * Check if the message worker id is set and matches the worker id.
-   *
    * @param message - The message to check.
    * @throws {@link https://nodejs.org/api/errors.html#class-error} If the message worker id is not set or does not match the worker id.
    */
   private checkMessageWorkerId (message: MessageValue<Data>): void {
     if (message.workerId == null) {
       throw new Error('Message worker id is not set')
-    } else if (message.workerId != null && message.workerId !== this.id) {
+    } else if (message.workerId !== this.id) {
       throw new Error(
-        `Message worker id ${message.workerId} does not match the worker id ${this.id}`
+        `Message worker id ${message.workerId.toString()} does not match the worker id ${this.id.toString()}`
       )
     }
   }
@@ -486,7 +467,6 @@ export abstract class AbstractWorker<
 
   /**
    * Returns the main worker.
-   *
    * @returns Reference to the main worker.
    * @throws {@link https://nodejs.org/api/errors.html#class-error} If the main worker is not set.
    */
@@ -499,7 +479,6 @@ export abstract class AbstractWorker<
 
   /**
    * Sends a message to main worker.
-   *
    * @param message - The response message.
    */
   protected abstract sendToMainWorker (
@@ -507,17 +486,16 @@ export abstract class AbstractWorker<
   ): void
 
   /**
-   * Sends task function names to the main worker.
+   * Sends task functions properties to the main worker.
    */
-  protected sendTaskFunctionNamesToMainWorker (): void {
+  protected sendTaskFunctionsPropertiesToMainWorker (): void {
     this.sendToMainWorker({
-      taskFunctionNames: this.listTaskFunctionNames()
+      taskFunctionsProperties: this.listTaskFunctionsProperties(),
     })
   }
 
   /**
    * Handles an error and convert it to a string so it can be sent back to the main worker.
-   *
    * @param error - The error raised by the worker.
    * @returns The error message.
    */
@@ -527,41 +505,41 @@ export abstract class AbstractWorker<
 
   /**
    * Runs the given task.
-   *
    * @param task - The task to execute.
-   * @throws {@link https://nodejs.org/api/errors.html#class-error} If the task function is not found.
    */
-  protected run (task: Task<Data>): void {
+  protected readonly run = (task: Task<Data>): void => {
     const { name, taskId, data } = task
-    const fn = this.taskFunctions.get(name ?? DEFAULT_TASK_NAME)
-    if (fn == null) {
+    const taskFunctionName = name ?? DEFAULT_TASK_NAME
+    if (!this.taskFunctions.has(taskFunctionName)) {
       this.sendToMainWorker({
         workerError: {
-          name: name as string,
-          message: `Task function '${name as string}' not found`,
-          data
+          // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+          name: name!,
+          // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+          message: `Task function '${name!}' not found`,
+          data,
         },
-        taskId
+        taskId,
       })
       return
     }
+    const fn = this.taskFunctions.get(taskFunctionName)?.taskFunction
     if (isAsyncFunction(fn)) {
-      this.runInAsyncScope(this.runAsync.bind(this), this, fn, task)
+      this.runAsync(fn as TaskAsyncFunction<Data, Response>, task)
     } else {
-      this.runInAsyncScope(this.runSync.bind(this), this, fn, task)
+      this.runSync(fn as TaskSyncFunction<Data, Response>, task)
     }
   }
 
   /**
    * Runs the given task function synchronously.
-   *
    * @param fn - Task function that will be executed.
    * @param task - Input data for the task function.
    */
-  protected runSync (
+  protected readonly runSync = (
     fn: TaskSyncFunction<Data, Response>,
     task: Task<Data>
-  ): void {
+  ): void => {
     const { name, taskId, data } = task
     try {
       let taskPerformance = this.beginTaskPerformance(name)
@@ -570,16 +548,17 @@ export abstract class AbstractWorker<
       this.sendToMainWorker({
         data: res,
         taskPerformance,
-        taskId
+        taskId,
       })
     } catch (error) {
       this.sendToMainWorker({
         workerError: {
-          name: name as string,
+          // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+          name: name!,
           message: this.handleError(error as Error | string),
-          data
+          data,
         },
-        taskId
+        taskId,
       })
     } finally {
       this.updateLastTaskTimestamp()
@@ -588,14 +567,13 @@ export abstract class AbstractWorker<
 
   /**
    * Runs the given task function asynchronously.
-   *
    * @param fn - Task function that will be executed.
    * @param task - Input data for the task function.
    */
-  protected runAsync (
+  protected readonly runAsync = (
     fn: TaskAsyncFunction<Data, Response>,
     task: Task<Data>
-  ): void {
+  ): void => {
     const { name, taskId, data } = task
     let taskPerformance = this.beginTaskPerformance(name)
     fn(data)
@@ -604,18 +582,19 @@ export abstract class AbstractWorker<
         this.sendToMainWorker({
           data: res,
           taskPerformance,
-          taskId
+          taskId,
         })
-        return null
+        return undefined
       })
-      .catch(error => {
+      .catch((error: unknown) => {
         this.sendToMainWorker({
           workerError: {
-            name: name as string,
+            // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+            name: name!,
             message: this.handleError(error as Error | string),
-            data
+            data,
           },
-          taskId
+          taskId,
         })
       })
       .finally(() => {
@@ -625,32 +604,32 @@ export abstract class AbstractWorker<
   }
 
   private beginTaskPerformance (name?: string): TaskPerformance {
-    this.checkStatistics()
+    if (this.statistics == null) {
+      throw new Error('Performance statistics computation requirements not set')
+    }
     return {
       name: name ?? DEFAULT_TASK_NAME,
       timestamp: performance.now(),
-      ...(this.statistics.elu && { elu: performance.eventLoopUtilization() })
+      ...(this.statistics.elu && {
+        elu: performance.eventLoopUtilization(),
+      }),
     }
   }
 
   private endTaskPerformance (
     taskPerformance: TaskPerformance
   ): TaskPerformance {
-    this.checkStatistics()
+    if (this.statistics == null) {
+      throw new Error('Performance statistics computation requirements not set')
+    }
     return {
       ...taskPerformance,
       ...(this.statistics.runTime && {
-        runTime: performance.now() - taskPerformance.timestamp
+        runTime: performance.now() - taskPerformance.timestamp,
       }),
       ...(this.statistics.elu && {
-        elu: performance.eventLoopUtilization(taskPerformance.elu)
-      })
-    }
-  }
-
-  private checkStatistics (): void {
-    if (this.statistics == null) {
-      throw new Error('Performance statistics computation requirements not set')
+        elu: performance.eventLoopUtilization(taskPerformance.elu),
+      }),
     }
   }