bapig/dist/server/cluster.js

Welcome to BAPIG, a powerful backend solution designed to streamline your development process. With over 40 built-in functionalities, BAPIG simplifies CRUD operations, facilitates authentication and encryption, handles communication tasks, and much more.

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.useClustering = void 0;
// src/server.ts
var cluster_1 = __importDefault(require("cluster"));
var print_1 = require("../helpers/print");
var server_1 = require("./server");
var helpers_1 = require("../helpers");
/**
 * Start a clustered server using the provided server function.
 * @param application - The Express application instance.
 */
var cpuNum = Number(process.env.NUMBER_OF_CPU_TO_USE) || 1;
var useClustering = function (application) {
    try {
        // Check if the application parameter is provided
        if (!application) {
            throw new Error("Can't start server without application");
        }
        // Check if the current process is the master process
        if (cluster_1.default.isPrimary && (cpuNum >= 1)) {
            var cpuMessage = "Device has: ".concat(helpers_1.numberOfCPUs, " CPU Core").concat(helpers_1.numberOfCPUs > 1 ? 's' : '', ".\n Using ").concat(cpuNum, " CPU").concat(cpuNum > 1 ? 's' : '', " for clustering.");
            print_1.print.log(cpuMessage);
            // Fork a worker for each CPU core
            for (var i = 0; i < cpuNum; i++) {
                cluster_1.default.fork();
            }
            // Handle worker online event
            cluster_1.default.on('online', function (worker) {
                if (worker.process.connected) {
                    var onlineMessage = "Worker ".concat(worker.process.pid, " is online");
                    print_1.print.success(onlineMessage);
                }
            });
            // Handle worker disconnect event
            cluster_1.default.on('disconnect', function (worker) {
                var disconnectMessage = "Worker ".concat(worker.process.pid, " disconnected, a new one will be created once it exits");
                print_1.print.warn(disconnectMessage);
            });
            // Handle worker exit event
            cluster_1.default.on('exit', function (worker, _exitCode, _signalCode) {
                var exitMessage = "Worker ".concat(worker.process.pid, " died");
                print_1.print.error(exitMessage);
                cluster_1.default.fork();
                var replacementMessage = "Worker ".concat(worker.process.pid, " is attempting to signal for a new worker to take its place");
                print_1.print.error(replacementMessage);
            });
        }
        else {
            // Execute the provided server function with the application parameter in each worker
            (0, server_1.startServer)(application);
        }
    }
    catch (error) {
        var errorMessage = "Error in useClustering: ".concat(error.message);
        print_1.print.error(errorMessage);
    }
};
exports.useClustering = useClustering;
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