hapi with oacle node js driver

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'use strict';


const Hapi = require('hapi');
const oracledb = require('oracledb');

var dbConPool;

//gracefull shut down of node js since we need to terminate con pool

if (process.platform === "win32") {
    //since no SIGINT on win, watch for Ctl+C
    console.log('win platform...');
    var rl = require("readline").createInterface({
        input: process.stdin,
        output: process.stdout
    });

    rl.on("SIGINT", () => {
        console.log('received SIGINT 0..');
        process.emit("SIGINT");
    });
}

process.on("SIGINT", () => {
    console.log('received SIGINT..');
    if (dbConPool) {
        console.log('terminate pool..');
        dbConPool.terminate((e) => {
            if (e) {
                console.log(e);
            }
        });
    }

    process.exit();
});

// Create a server with a host and port
const server = new Hapi.Server();
server.connection({
    host: 'localhost',
    port: 8000
});


// Add the route
server.route({
    method: 'GET',
    path: '/hapi/employee',
    handler: (request, reply) => {

        dbConPool.getConnection(
            (err, connection) => {
                if (err) {
                    console.error(err.message);
                    return reply('error');
                }

                connection.execute(
                    "SELECT * from employees where rownum < 10", [],
                    (err, result) => {
                        releaseDbCon(connection);
                        if (err) {
                            console.error(err.message);
                            return reply('error');
                        }

                        var employees = [];
                        result.rows.forEach((r) => {
                            employees.push({
                                id: r[0],
                                firstName: r[1],
                                lastName: r[2],
                                email: r[3],
                                phoneNumber: r[4],
                                hireDate: r[5],
                                jobId: r[6],
                                salary: r[7]
                            });
                        });

                        return reply(employees);
                    });
            });


    }
});

function releaseDbCon(connection) {
    connection.release(
        (err) => {
            if (err) {
                console.error(err.message);
            }
        });
}

// Start the server
server.start((err) => {

    if (err) {
        throw err;
    }
    console.log('Server running at:', server.info.uri);

    //create db con pool
    oracledb.createPool({
            user: "hr",
            password: "password",
            connectString: "localhost:1521/xe"
        },
        (err, pool) => {
            if (!err) {
                dbConPool = pool;
            }
        });

});