Cleanup code in config/bootstrap.js

[MaheshkumarSundaram]

Hi @neonexus

In my Sails.js webapp, I am using a MongoDB in addition to the MySQL one. I don't use models for MongoDB as it involves complex querying (aggregation pipelines).

So, I have created a service MongoDbService.js which uses MongoClient. Tto effectively deal with start up connection to Mongo & final clean up, I have added the below in config/bootstrap.js:

    if (process.env.NOT_FROM_SAILS_LIFT !== 'true') {
        console.error(''); // Blank line.
        console.error(''); // Blank line.
        console.error('WARNING! You can NOT use `sails lift` to run this repo!');
        console.error('Instead, you should use either `node app.js` OR `./app.js`');
        console.error('Or you can start with the provided Ngrok script `node ngrok.js` OR `./ngrok.js`');
        console.error(''); // Blank line.
        console.error(''); // Blank line.

        return process.exit(1);
    }

    // Setting Up Mongo Connection
    MongoDbService.connect()
        .then(() => {
            console.log("Connected to MongoDB");
        })
        .catch((err) => {
            console.error(''); // Blank line.
            console.error(''); // Blank line.
            console.log("ERROR!!! Failure in connecting with MongoDB: ", err);
            console.error(''); // Blank line.
            console.error(''); // Blank line.
            return process.exit(1);
        });

    function cleanUp() {
        MongoDbService.disconnect()
            .then(() => {
                console.log("Disconnected from MongoDB");
            })
            .catch((err) => {
                console.error(''); // Blank line.
                console.error(''); // Blank line.
                console.log("ERROR!!! Failure in disconnecting from MongoDB: ", err);
                console.error(''); // Blank line.
                console.error(''); // Blank line.
            });
        return process.exit();
    }

    process.on('SIGINT', cleanUp);
    process.on('SIGTERM', cleanUp);
    sails.on('lower', cleanUp);

The connection setup is fine and i don't any issues while querying & stuff.

But when I exit the webserver, I have no indication that the MongoDB connection is closed. I don't see any console logs related to disconnect.

How do I confirm the connection close is happening?

Could you please provide any insight on this? Thank you.

[neonexus]

@MaheshkumarSundaram you don't need to worry about closing connections; once the process is ended, the connection is closed. This is an exercise is futility.

[MaheshkumarSundaram]

Alright thanks