Allow your applications to access real-time data changes

When you need to react immediately to changes in your MongoDB database, change streams and triggers can help you make that happen.  In part four of this quick start tutorial for beginners, Lauren Schaefer explains three ways to monitor change streams in a Node.js script:  using EventEmitter's on(), using ChangeStream's hasNext(), and using Node's Stream API.  She also explains how to create triggers in MongoDB Atlas.

Chapters:
00:00 Intro
00:57 Change Streams
03:52 Monitoring Change Streams Using EventEmitter's on()
12:21 Monitoring Change Streams Using ChangStream's hasNext()
16:37 Monitoring Change Streams Using the Stream API
19:57 Resuming Change Streams
21:43 Triggers
27:16 Wrapping Up

Links Lauren mentions in the video:
Lauren's blog post: Change Streams & Triggers with Node.js Tutorial <a href="https://developer.mongodb.com/quickstart/nodejs-change-streams-triggers" target="_blank" rel="noreferrer">https://developer.mongodb.com/quickstart/nodejs-change-streams-triggers</a> 
Lauren's GitHub repo with the code from this video <a href="https://github.com/mongodb-developer/nodejs-quickstart/blob/master/changeStreams.js" target="_blank" rel="noreferrer">https://github.com/mongodb-developer/nodejs-quickstart/blob/master/changeStreams.js</a> 
Node.js & MongoDB Starter Template File <a href="https://github.com/mongodb-developer/nodejs-quickstart/blob/master/template.js" target="_blank" rel="noreferrer">https://github.com/mongodb-developer/nodejs-quickstart/blob/master/template.js</a> 

Other videos in this tutorial series:
Part 1: <a href="https://youtu.be/fbYExfeFsI0" target="_blank" rel="noreferrer">https://youtu.be/fbYExfeFsI0</a>
Part 2: <a href="https://youtu.be/iz37fDe1XoM" target="_blank" rel="noreferrer">https://youtu.be/iz37fDe1XoM</a>
Part 3: <a href="https://youtu.be/bdS03tgD2QQ" target="_blank" rel="noreferrer">https://youtu.be/bdS03tgD2QQ</a>

Connect with Lauren:
Twitter:  <a href="https://twitter.com/lauren_schaefer" target="_blank" rel="noreferrer">https://twitter.com/lauren_schaefer</a>​
TikTok: <a href="https://tiktok.com/@lauren_schaefer" target="_blank" rel="noreferrer">https://tiktok.com/@lauren_schaefer</a>​
Linkedin: <a href="https://www.linkedin.com/in/laurenjan..." target="_blank" rel="noreferrer">https://www.linkedin.com/in/laurenjan...</a>​ 
MongoDB Community: <a href="https://developer.mongodb.com/community/forums/t/hey-friends-im-lauren/168/" target="_blank" rel="noreferrer">https://developer.mongodb.com/community/forums/t/hey-friends-im-lauren/168/</a>

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MongoDB & Node.js: Change Streams & Triggers (Part 4 of 4)

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MongoDB & Node.js: Change Streams & Triggers (Part 4 of 4)