Developing Microservices with Quarkus Course Syllabus

Overview: This project-driven course provides a concise yet comprehensive introduction to building microservices with Quarkus. Designed for Java developers, it spans approximately 6 hours and combines foundational concepts with hands-on labs. You'll progress from setting up a Quarkus project to developing REST, WebSocket, and GraphQL endpoints, integrating persistence, and implementing fault tolerance. The course concludes with a capstone project that integrates all components into a functional microservice suite.

Module 1: Introduction to Quarkus & Project Setup

Estimated time: 0.5 hours

• Understanding Quarkus philosophy: container-first and native image support
• Setting up development environment with Quarkus CLI and Maven plugin
• Bootstrapping a new Quarkus project
• Exploring live-coding with hot reload

Module 2: Building RESTful Services

Estimated time: 1 hour

• Creating JAX-RS resources for HTTP endpoints
• Using CDI for dependency injection
• Serializing data with JSON-B and Jackson
• Documenting APIs using OpenAPI and Swagger annotations

Module 3: REST Client & API Documentation

Estimated time: 1 hour

• Defining REST clients with MicroProfile REST Client
• Consuming external HTTP services
• Registering and configuring client instances
• Generating and viewing interactive Swagger UI documentation

Module 4: WebSockets in Quarkus

Estimated time: 0.75 hours

• Implementing WebSocket servers with @ServerEndpoint
• Managing WebSocket sessions and messages
• Broadcasting real-time updates to clients
• Building a functional chat-based microservice

Module 5: GraphQL Endpoints

Estimated time: 0.75 hours

• Defining GraphQL schemas using SmallRye GraphQL
• Implementing queries and mutations
• Mapping payloads to domain objects
• Exposing a fully functional GraphQL API

Module 6: Fault Tolerance & Health Checks

Estimated time: 0.75 hours

• Applying @Retry and @CircuitBreaker for resilience
• Implementing liveness and readiness health checks
• Configuring fault tolerance policies
• Testing failure recovery in microservices

Module 7: Persistence & Database Integration

Estimated time: 1 hour

• Integrating PostgreSQL with Quarkus
• Using Panache ORM for simplified entity management
• Performing CRUD operations with Panache
• Introduction to reactive database clients

Module 8: Capstone Project – Microservice Application

Estimated time: 1 hour

• Developing a cohesive microservice using REST, WebSockets, and GraphQL
• Integrating fault tolerance and health checks
• Connecting to a database with Panache for persistence

Prerequisites

• Familiarity with Java and basic web concepts
• Experience with Maven or Gradle build tools
• Basic understanding of REST APIs and JSON

What You'll Be Able to Do After

• Create and configure Quarkus applications using CLI or Maven
• Build and document RESTful services with JAX-RS and OpenAPI
• Consume external APIs using type-safe REST clients
• Implement real-time communication with WebSockets
• Expose and query data via GraphQL endpoints