This project contains the backend routes and the microservice which syncs the comment. The front-end (https://github.com/spsiddarthan/comment-syncer-frontend) fires a message with the comment delte to the '/messages' end point everytime the user takes a pause while typing. If the user stays idle for more than three seconds, he is assumed to be taking a pause.
The '/messages' end point sends the message to the 'commentSyncer' microservice via commentSync RabbitMQ queue. The 'commentSyncer' microservice consumes the message and makes a post call (technically, the post route here is an upsert route - it eithers updates or creates a comment). The '/comments' end point accepts the 'diffs' parameter to sync the comment.
The api uses the Mongoose to connect with MongoDB.
Usage: After cloning the project, do a npm install to install the dependencies. MongoDB and RabbitMQ are running with their default configurations.
The command node app.js will bring the api up and the command node commentSyncer.js will bring the commentSyncer microservice api up (I added commentSyncer to the same repository for simplicity, ideally it would have been a repo of its own).