@penkov/tasks_queue/dist/tasks-model.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.

export var TaskStatus;
(function (TaskStatus) {
    TaskStatus["pending"] = "pending";
    TaskStatus["in_progress"] = "in_progress";
    TaskStatus["blocked"] = "blocked";
    TaskStatus["finished"] = "finished";
    TaskStatus["error"] = "error";
})(TaskStatus || (TaskStatus = {}));
export var BackoffType;
(function (BackoffType) {
    BackoffType["constant"] = "constant";
    BackoffType["linear"] = "linear";
    BackoffType["exponential"] = "exponential";
})(BackoffType || (BackoffType = {}));
export var TaskPeriodType;
(function (TaskPeriodType) {
    TaskPeriodType["fixed_rate"] = "fixed_rate";
    TaskPeriodType["fixed_delay"] = "fixed_delay";
    TaskPeriodType["cron"] = "cron";
})(TaskPeriodType || (TaskPeriodType = {}));
export var MissedRunStrategy;
(function (MissedRunStrategy) {
    MissedRunStrategy["catch_up"] = "catch_up";
    MissedRunStrategy["skip_missed"] = "skip_missed";
})(MissedRunStrategy || (MissedRunStrategy = {}));
export const TASK_HEARTBEAT_THROTTLE_MS = 60_000;
export function taskHeartbeatThrottleMs(timeout) {
    if (!Number.isFinite(timeout) || timeout <= 0) {
        return TASK_HEARTBEAT_THROTTLE_MS;
    }
    return Math.min(TASK_HEARTBEAT_THROTTLE_MS, Math.max(1, timeout / 2));
}
export class TaskFailed extends Error {
    payload;
    constructor(message, payload) {
        super(message);
        this.payload = payload;
    }
}
export class TaskTimedOutError extends Error {
    taskId;
    finalStatus;
    constructor(taskId, finalStatus) {
        super(`Task ${taskId} timed out before liveness was refreshed`);
        this.taskId = taskId;
        this.finalStatus = finalStatus;
    }
}