+ * @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): TaskFunctionOperationResult {
+ try {
+ checkTaskFunctionName(name)
+ if (name === DEFAULT_TASK_NAME) {
+ throw new Error(
+ 'Cannot set the default task function reserved name as the default task function'
+ )
+ }
+ if (!this.taskFunctions.has(name)) {
+ throw new Error(
+ 'Cannot set the default task function to a non-existing task function'
+ )
+ }
+ // 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 }
+ }
+ }
+
+ /**
+ * 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)
+ const {
+ statistics,
+ checkActive,
+ taskFunctionOperation,
+ taskId,
+ data,
+ kill
+ } = message
+ if (statistics != null) {
+ // Statistics message received
+ this.statistics = statistics
+ } else if (checkActive != null) {
+ // Check active message received
+ checkActive ? this.startCheckActive() : this.stopCheckActive()
+ } else if (taskFunctionOperation != null) {
+ // Task function operation message received
+ this.handleTaskFunctionOperationMessage(message)
+ } else if (taskId != null && data != null) {
+ // Task message received
+ this.run(message)
+ } else if (kill === true) {
+ // Kill message received
+ this.handleKillMessage(message)
+ }
+ }
+
+ protected handleTaskFunctionOperationMessage (
+ message: MessageValue<Data>
+ ): void {
+ const { taskFunctionOperation, taskFunctionProperties, taskFunction } =
+ message
+ if (taskFunctionProperties == null) {
+ throw new Error(
+ 'Cannot handle task function operation message without task function properties'
+ )
+ }
+ 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(
+ `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
+ }
+ this.sendToMainWorker({
+ taskFunctionOperation,
+ taskFunctionOperationStatus: response.status,
+ taskFunctionProperties,
+ ...(!response.status &&
+ response.error != null && {
+ workerError: {
+ name: taskFunctionProperties.name,
+ message: this.handleError(response.error as Error | string)
+ }
+ })
+ })
+ }
+
+ /**
+ * Handles a kill message sent by the main worker.
+ *
+ * @param message - The kill message.