Skill Topic · Cinematic

📘 MongoDB — Change Streams

Real-time database changes listen karo — live notifications, sync, audit! 📡

Topic 1

📌 1. Change Streams Kya Hai?

💡

Insert / Update / Delete / Replace…

🔑

oplog based (replica set required!)

⚡

Resumable (disconnect ke baad…

🎯

Filterable (specific changes hi…

Topic 2

📌 2. Requirements

💡 ` ┌─────────────────────────────────────────┐ │ ✅ Replica set or sharded cluster │ │ ✅…

Topic 3

📌 3. Basic Usage (mongosh)

🎯 `javascript // ═══ Watch a collection ═══ const changeStream = db.orders.watch()…

Topic 4

📌 4. Operation Types

⭐ `javascript // ═══ All operation types ═══ // "insert" — New document inserted //…

Topic 5

📌 5. Full Document Options

🔑 `javascript // ═══ Get full document on updates ═══ const changeStream =…

Topic 6

📌 6. Filtering Changes (Pipeline)

✨ `javascript // ═══ Watch specific operations ═══ const changeStream = db.orders.watch([ {…

Topic 7

📌 7. Resume Tokens

🌟 `javascript // ═══ Resume after disconnect ═══ let resumeToken = null const changeStream…

Topic 8

📌 8. Node.js Change Stream

🚀 `javascript const { MongoClient } = require("mongodb") async function watchChanges() {…

Topic 9

📌 9. Python Change Stream

📚 `python from pymongo import MongoClient import threading client =…

Topic 10

📌 10. Practical Use Cases

💡 `javascript // ═══ 1. Real-time notifications ═══ const stream = db.messages.watch([ {…

Topic 11

📌 11. Best Practices

🎯 ` ✅ DO: • Resume token persist karo (DB/Redis me) — crash recovery! • Pipeline me early…

Topic 12

✅ Summary

⭐ KEY POINTS: - Change Streams = real-time event stream (oplog based) - Replica set…

Quick Quiz

Quiz — Question 1

📘 MongoDB — Change Streams ka sabse sahi definition kya hai?

Complete! 🎉

📘 MongoDB — Change Streams Complete!

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