@saniot/kafka-header-helper/index.js

A package which help in making consistent kafka header.

const { serviceDetails } = require("./config");

/**
 * header for kafka payload
 * @param {String} service_name - Value of service name
 * @returns {Object}
 */
exports.kafkaHeader = function (service_name) {
    return {
        service_name,
        host_name: serviceDetails.host_name,
        host_ip: serviceDetails.host_ip,
        pid: process.pid,
    };
};

/**
 * It add header in all kafka messages.
 * @param {Array} payloads - kafka payload
 * @param {*} service_name - service name to add
 * @returns {Array}
 */
exports.addHeader = function (payloads, service_name) {
    if (!payloads || !Array.isArray(payloads))
        throw new Error("Excepting an Array as payloads");

    return payloads.map((payload) => {
        if (
            typeof payload === "object" &&
            payload !== null &&
            !Array.isArray(payload)
        ) {
            payload.headers = {
                service_name,
                host_name: serviceDetails.host_name,
                host_ip: serviceDetails.host_ip,
                pid: process.pid.toString(),
            };
        }
        return payload;
    });
};