@shieldsbetter/sb-optimistic-resources

sb-optimistic-resources

Optimistic locking library for MongoDb. Perform updates with plain Javascript.

TL;DR

const assert = require('assert');
const OptResourceCollection = require('@shieldsbetter/sb-optimistic-resources');
const { MongoClient } = require('mongodb');

async main() {
    const dbClient = await MongoClient
            .connect(process.env.MONGOD_URI)
            .then(mc => mc.db('TestDb'));
    const petsCollection =
            new OptResourceCollection(dbClient.collection('Pets'));

    await petsCollection.insertOne({
        _id: 'Ellie',
        breed: 'Azawakh',
        age: 6
    });

    // If there is a conflicting update, this will retry automatically
    // with the new value.
    await petsCollection.updateOne({ _id: 'Ellie' }, ellie => {
        ellie.age++;
        return ellie;
    });

    const resource = await petsCollection.findOne({ _id: 'Ellie' });
    assert.deepEqual(resource, {
        _id: 'Ellie',
        breed: 'Azawakh',
        age: 7;
    });
}