Cosmos DB Changes → Event Capture

Azure • Streaming • Intermediate • Payments

Architecture Diagram

Overview

Modern payment systems generate a continuous stream of changes.

Transactions are created, refunds are initiated, settlements are completed, and disputes are opened or resolved throughout the day. Instead of waiting for batch processing, many organizations capture these changes as events and make them available to downstream systems in near real time.

In this pipeline, you will build the event capture layer on Azure.

You will capture changes from Cosmos DB, convert them into business events, publish them to Event Hubs, and store the events in a centralized streaming platform for downstream consumers.

What You Will Build

  • Capture changes from Cosmos DB containers
  • Convert database changes into business events
  • Publish events to Azure Event Hubs
  • Create a centralized event stream for downstream consumers
  • Organize payment, refund, settlement, and dispute events
  • Track event metadata and processing information
  • Store streaming data on ADLS Gen2
  • Make captured events available for downstream processing
  • Query captured events using Synapse Serverless SQL

Tech Stack

Azure Cosmos DB • Azure Functions • Azure Event Hubs • Azure Databricks • Delta Lake • ADLS Gen2 • Synapse Serverless SQL • Python

Learning Outcomes

After completing this pipeline, you will be able to:

  1. Capture changes from operational databases
  2. Convert database changes into business events
  3. Publish events to Azure Event Hubs
  4. Build an event-driven architecture on Azure
  5. Store event streams for downstream processing
  6. Organize events using a centralized streaming platform
  7. Query captured events using Synapse Serverless SQL
  8. Understand how event capture fits into modern data platforms
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