node-firebird-driver-native/src/lib/events.ts

Firebird Native Driver for Node.js

import { AttachmentImpl } from './attachment';

import { AbstractEvents } from 'node-firebird-driver/dist/lib/impl';

import * as fb from 'node-firebird-native-api';


/** Events implementation. */
export class EventsImpl extends AbstractEvents {
	// Override declarations.
	override attachment: AttachmentImpl;

	eventCallback: fb.EventCallback;

	static async queue(attachment: AttachmentImpl, names: string[], callBack: (counters: [string, number][]) => Promise<void>):
			Promise<EventsImpl> {
		const events = new EventsImpl(attachment);
		const { client } = attachment;

		events.eventCallback = await fb.queueEvent(client.master!, attachment.attachmentHandle!, names, callBack);

		return events;
	}

	/** Disposes this events' resources. */
	protected async internalCancel(): Promise<void> {
		if (this.eventCallback) {
			const { eventCallback } = this;
			this.eventCallback = undefined!;
			await fb.cancelEvent(eventCallback);
		}
	}
}