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Advanced 22 min readModule: Module 8: Microservices vs Monolithic Architecture

Microservices Architecture & The Saga Pattern

Design modular microservices, communicate via high-speed gRPC, and manage distributed transactions with Sagas.

What You Will Learn in This Lesson

  • Decomposing monoliths using Domain-Driven Design (Bounded Contexts)
  • High-speed binary communication with gRPC and Protocol Buffers
  • Distributed transactions using Choreography/Orchestration Sagas and compensating actions

Introduction & Core Concept

Microservices architecture structures an application as a collection of loosely coupled, independently deployable services organized around business domains.
WHY DOES THIS MATTER IN THE REAL WORLD?

Saga patterns coordinate distributed transactions across independent microservice databases using compensating transactions if a step fails.

Compensating Saga Transaction

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1. Reserve Inventory (Success)
2. Authorize Payment (Failed!)
3. [Compensating Action triggered] -> Release Reserved Inventory

Line-by-Line Technical Breakdown

1gRPC uses HTTP/2 multiplexing and Protocol Buffers binary serialization for 5x faster speed than REST/JSON.

Try It Yourself (Interactive Editor)

Modify the code in real-time and click Run to test live browser output and console logs.

Intelligent Code Runner & Live Sandbox[TEXT]
TEXT SOURCE EDITOR
Interactive Live Code

Industry Best Practices & Professional Standards

  • Start with a modular monolith; split into microservices only when organizational scaling demands it.

Lesson Summary & Core Takeaways

  • Microservices enable independent team deployment and specialized service scaling.