@penkov/tasks_queue/dist/tasks-auxiliary-worker.js

A lightweight PostgreSQL-backed task queue system with scheduling, retries, backoff strategies, and priority handling. Designed for efficiency and observability in modern Node.js applications.

import log4js from "log4js";
import { TaskStatus } from "./tasks-model.js";
import { TimeUtils } from "./time-utils.js";
const logger = log4js.getLogger("TasksAuxiliaryWorker");
export class TasksAuxiliaryWorker {
    tasksQueueDao;
    workerTimer = null;
    constructor(tasksQueueDao) {
        this.tasksQueueDao = tasksQueueDao;
    }
    start() {
        try {
            const run = () => {
                this.runAuxiliaryJobs();
            };
            this.workerTimer = setInterval(() => run(), TimeUtils.second * 30);
            run();
        }
        catch (e) {
            logger.warn("Failed to process stalled tasks", e);
        }
    }
    runAuxiliaryJobs() {
        try {
            this.tasksQueueDao
                .failStalled()
                .then((res) => {
                if (res.nonEmpty) {
                    logger.info(`Marked stalled as failed: ${res.mkString(", ")}`);
                }
            })
                .catch((e) => {
                logger.warn("Failed to process stalled tasks", e);
            });
            this.tasksQueueDao.resetFailed().catch((e) => {
                logger.warn("Failed to reset failed tasks", e);
            });
            this.tasksQueueDao.clearFinished().catch((e) => {
                logger.warn("Failed to clear finished tasks", e);
            });
        }
        catch (e) {
            logger.warn("Failed to process stalled tasks", e);
        }
    }
    async stop() {
        if (this.workerTimer) {
            clearTimeout(this.workerTimer);
        }
    }
    pendingCount(queue) {
        return this.tasksQueueDao.statusCount(queue, TaskStatus.pending);
    }
    inProgressCount(queue) {
        return this.tasksQueueDao.statusCount(queue, TaskStatus.in_progress);
    }
}