Big Data

Structured Streaming for Real-Time Dashboards

Businesses want data now, not tomorrow. This lesson covers the micro-batch concept and connects a live Kafka stream to a Spark DataFrame with a sliding window count.

Level: AdvancedBig Data

What You'll Learn

Micro-batch vs continuous streaming models
Structured Streaming vs DStreams in Spark
Reading from a Kafka topic as a DataFrame
Sliding window and tumbling window aggregations
Watermarking for late-arriving events
Writing stream output to a live dashboard sink
Checkpoint and fault-tolerance in streaming jobs

What's Included

🧭AI Tutor🔒

Interactive learning path with AI-generated lessons read aloud by your personal tutor

🧪Practice Lab🔒

Step-by-step lab instructions with AI guidance — run in your own IDE or sandbox.

🎙️Mock Interviews🔒

AI interviewer asks tailored questions, gives real-time feedback and a score report

📝Evaluation🔒

MCQ questions (theory, practical, code) to test your knowledge and earn a badge

⚔️Challenge AI🔒

Compete head-to-head against AI on real production problems — judged on correctness, performance, scalability, code quality, and edge cases

Course Syllabus

Module 1: Structured Streaming Fundamentals

  • •Micro-batch concept: how Spark processes streams in chunks
  • •Structured Streaming API vs legacy DStreams
  • •Source types: Kafka, file, socket, rate
  • •Output modes: append, complete, update
  • •Checkpointing for exactly-once guarantees

Module 2: Kafka Integration

  • •Kafka topic setup and producer simulation
  • •Reading a Kafka stream as a Spark DataFrame
  • •Deserialising JSON message payloads
  • •Schema inference and enforcement on stream data
  • •Managing Kafka offsets and consumer groups

Module 3: Sliding Window Aggregations

  • •Tumbling vs sliding window concepts
  • •Implementing a sliding window count in Spark SQL
  • •Watermarking to handle late-arriving events
  • •Writing aggregated output to a console or Postgres sink
  • •Capstone: live Kafka → Spark → sliding window dashboard

You're all set

Everything in this course is unlocked.

Continue Learning →
✓AI Tutor
✓Practice Lab
✓Mock Interviews
✓Evaluation
✓Challenge AI