@kuflow/kuflow-temporal-worker/lib/kuflow-worker-information-notifier.js

Worker library used by KuFlow SDKs and Temporal.

"use strict";
/**
 * The MIT License
 * Copyright © 2021-present KuFlow S.L.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.KuFlowWorkerInformationNotifier = void 0;
const worker_1 = require("@temporalio/worker");
const os_1 = __importDefault(require("os"));
const HEADER_X_KF_DELAY_WINDOW = 'x-kf-delay-window';
class KuFlowWorkerInformationNotifier {
    workerInformation;
    options;
    backoff;
    started = false;
    delayWindowInSeconds = 5 * 60; // 5 min
    consecutiveFailures = 0;
    scheduleCreateOrUpdateWorkerTimeout;
    static instance(params) {
        return new KuFlowWorkerInformationNotifier(params.workerInformation, params.options);
    }
    constructor(workerInformation, options) {
        this.workerInformation = workerInformation;
        this.options = options;
        const backoff = this.options.kuflow.workerInformationNotifierBackoff;
        this.backoff = {
            sleep: backoff?.sleep ?? 1,
            exponentialRate: backoff?.exponentialRate ?? 2.5,
        };
    }
    async start() {
        if (this.started) {
            return;
        }
        await this.createOrUpdateWorker();
        this.scheduleCreateOrUpdateWorker();
        this.started = true;
    }
    async close() {
        if (!this.started) {
            return;
        }
        this.scheduleCreateOrUpdateWorkerTimeout != null && clearTimeout(this.scheduleCreateOrUpdateWorkerTimeout);
        this.scheduleCreateOrUpdateWorkerTimeout = undefined;
        this.started = false;
    }
    async createOrUpdateWorker() {
        const workerRequest = {
            identity: this.workerInformation.identity,
            ip: this.getIPAddress(),
            hostname: os_1.default.hostname(),
            taskQueue: this.workerInformation.taskQueue,
            workflowTypes: this.workerInformation.workflowTypes,
            activityTypes: this.workerInformation.activityTypes,
            tenantId: this.options.kuflow.tenantId,
            installationId: this.options.kuflow.installationId,
            robotIds: this.options.kuflow.robotIds,
        };
        const workerOperations = this.options.kuflow.restClient.workerOperations;
        try {
            let rawResponse = undefined;
            const workerResponse = await workerOperations.createWorker(workerRequest, {
                onResponse: rawResponseInner => {
                    rawResponse = rawResponseInner;
                },
            });
            worker_1.Runtime.instance().logger.info(`Registered worker ${workerResponse.taskQueue}/${workerResponse.identity} with id ${workerResponse.id}`);
            this.consecutiveFailures = 0;
            const delayWindowHeader = rawResponse?.headers.get(HEADER_X_KF_DELAY_WINDOW);
            if (delayWindowHeader != null) {
                this.delayWindowInSeconds = parseInt(delayWindowHeader, 10);
            }
        }
        catch (error) {
            worker_1.Runtime.instance().logger.error(`There are some problems registering worker ${workerRequest.taskQueue}/${workerRequest.identity}`, { error });
            this.consecutiveFailures++;
        }
    }
    scheduleCreateOrUpdateWorker() {
        let delayInSeconds = this.delayWindowInSeconds;
        if (this.consecutiveFailures > 0) {
            delayInSeconds = Math.round(Math.min(delayInSeconds, this.backoff.sleep * Math.pow(this.backoff.exponentialRate, this.consecutiveFailures)));
        }
        this.scheduleCreateOrUpdateWorkerTimeout != null && clearTimeout(this.scheduleCreateOrUpdateWorkerTimeout);
        this.scheduleCreateOrUpdateWorkerTimeout = setTimeout(() => {
            this.createOrUpdateWorker().then(() => {
                this.scheduleCreateOrUpdateWorker();
            }, () => {
                this.scheduleCreateOrUpdateWorker();
            });
        }, delayInSeconds * 1_000);
    }
    getIPAddress() {
        const interfaces = os_1.default.networkInterfaces();
        for (const devName in interfaces) {
            const iface = interfaces[devName] ?? [];
            for (let i = 0; i < iface.length; i++) {
                const alias = iface[i];
                if (alias.address !== '127.0.0.1' && alias.address !== '0:0:0:0:0:0:0:1' && !alias.internal) {
                    return alias.address;
                }
            }
        }
        return '0.0.0.0';
    }
}
exports.KuFlowWorkerInformationNotifier = KuFlowWorkerInformationNotifier;
//# sourceMappingURL=kuflow-worker-information-notifier.js.map