Subscribing to MongoDB Change Streams Via WebSockets

Subscribing to MongoDB Change Streams Via WebSockets

Change streams allow applications to access real-time data changes without the complexity and risk of tailing the oplog. Applications can use change streams to subscribe to all data changes on a single collection, a database, or an entire deployment, and immediately react to them. Because change streams use the aggregation framework, applications can also filter for specific changes or transform the notifications at will. Subscribe to MongoDB Change Streams via WebSockets using Python and Tornado.

Change streams allow applications to access real-time data changes without the complexity and risk of tailing the oplog. Applications can use change streams to subscribe to all data changes on a single collection, a database, or an entire deployment, and immediately react to them. Because change streams use the aggregation framework, applications can also filter for specific changes or transform the notifications at will.

Prerequisites

The example code in this article will assume you have a cluster running in MongoDB Atlas, but it will work with any MongoDB version from 3.6 onwards.

You will also need Python 3.6+ with Motor and Tornado installed.

mongodb websockets

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