Node js code exit point

JavaScript
1

The following code runs fine. data gets inserted into the collection. However, the program doesnoot exit. The console just stays there. How to exit gracefully?

const mongoClient = require('mongodb').MongoClient
const url = 'mongodb://localhost:27017'
const schema = 'learndb'

const client = new mongoClient(url,{ useUnifiedTopology: true })

const connection = client.connect(function(err,client){
    if(err){
        console.log('~~~UNABLE TO CONNECT TO MONGO~~~')
        throw err
    }
    console.log('~~~SUCCESSFULLY CONNECTED TO MONGO~~~')
})

const db = client.db(schema)

db.collection('mycol').insertMany ([
    {id:'1101',value:'ddddddddd'},
    {id:'1102',value:'aaaaaaaaa'},
    {id:'1103',value:'bbbbbbbbb'},
    {id:'1104',value:'ccccccccc'},
])
2

[off-topic]
Hey @halwaraj when you post code in the forum, you need to format it. To do so you can either select all the code and click the </> button, or type 3 backticks ``` on a separate line both before and after the code block.

I have done it for you this time.
[/off-topic]

3

https://nodejs.dev/learn/how-to-exit-from-a-nodejs-program

4

No so sure about process.exit(), that the program does not exit normally means there’s still something going on in the background… @halwaraj I haven’t tried it myself, but what if you just close() the client?

5

OOps… i usually do that…missed it somehow… will remember next time…

1 Like
6

No… it has finished processing…

yes close will exit the program but also closes the DB connection. which is a performance issue… so is there a way to acheive this???

7

i’m… confused.

How is it a performance issue if your entire program is running a single query?

Having lingering connections to the database would be a performance issue… running infinitely many queries would be a performance issue… disconnecting from the database would not.

1 Like
8

i mean connection pool.
It would help to re use the connection for every new request instead of creating a new connection everytime.

9

Well there are no requests in the code you posted, it looks more like a CLI script of sorts. If you have a server running handling requests, you can of course reuse the same connection as your server (hopefully) would’t terminate by itself anyway.

10

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