mqtt_manager_common/src/repository/mongoose.utils.js

Common functions for the manager

const MONGOOSE = require('mongoose');

class MongooseUtils{
    constructor(){
        this.mongooseConnect();
    }

    mongooseConnect() {
        MONGOOSE.connect('mongodb://localhost:27017/weather_ai', { keepAlive: 120, poolSize: 4 });
        MONGOOSE.connection.on('connected', this.onConnection);
        MONGOOSE.connection.on('disconnect', this.onDisconnect);
        MONGOOSE.connection.on('close', this.onConnectionClose);
        MONGOOSE.connection.on('error', this.onError)
    }

    mongooseDisconnect() {
        MONGOOSE.disconnect();
    }

    onConnection() {
        this.isConnected = true;
        process.on('SIGINT', function() {
            MONGOOSE.connection.close(function () {
                console.log('Mongoose default connection disconnected through app termination');
                process.exit(0);
            });
        });
    }

    onDisconnect() {
        this.isConnected = false;
    }

    onConnectionClose() {
        this.isConnected = false;
    }

    onError(err) {
        console.error(err);
        console.error("Make sure that mongodb is running");
        process.exit(0)
    }


    isConnected() {
        return this.isConnected;
    }

    get mongoose() {
        return MONGOOSE;
    }
}

var instance = new MongooseUtils();

module.exports = instance;