Devoxx Courses

TCP? UDP? Que? - Fundamentals That Were Abstracted Away from Us

Revisit the socket-level details hidden by web abstractions, comparing TCP and UDP to guide protocol choices and custom communication designs.

• YouTube
• 45 minutes
• Self-Paced
• Conference Talk

Hands-on with JMH - Become a Benchmarking Expert in 30 Minutes

Use JMH examples to benchmark performance, investigate race conditions and deadlocks, and automate profiling runs from Gradle.

• YouTube
• 31 minutes
• Self-Paced
• Conference Talk

Caching 101 - Caching on the JVM and Beyond

Starting with a real Java application, the session measures contention and adds caching patterns before comparing cache topologies and their tradeoffs.

• YouTube
• 2 hours 36 minutes
• Self-Paced
• Conference Talk

Spring REST Docs - Documenting RESTful APIs Using Your Tests

See how Spring REST Docs generates API documentation from integration tests and fails tests when the documentation no longer matches their results.

• YouTube
• 32 minutes
• Self-Paced
• Conference Talk

Modular Development with JDK 9

Learn the Java Platform Module System by building modules from scratch and applying design principles to modularize existing libraries and applications.

• YouTube
• 2 hours 39 minutes
• Self-Paced
• Conference Talk

Get a Taste of Lambdas and Get Addicted to Streams

Explore Java 8 lambda expressions and streams, from implementation details to lazy, infinite, and parallel streams.

• YouTube
• 2 hours 47 minutes
• Self-Paced
• Conference Talk

Core Design Principles for Software Developers

Use concrete examples and trade-offs to see how core design principles shape software quality.

• YouTube
• 2 hours 36 minutes
• Self-Paced
• Conference Talk

Design Pattern Reloaded

Recasts GoF behavioral and creational patterns through a blend of functional programming and object-oriented Java 8.

• YouTube
• 2 hours 49 minutes
• Self-Paced
• Conference Talk

Writing Groovy AST Transformations - Getting Practical in an Hour

A practical introduction to writing custom Groovy AST transformations, showing that the work can be approachable without deep compiler theory.

• YouTube
• 32 minutes
• Self-Paced
• Conference Talk

Preventing Null Pointer Exceptions at Compile Time

Use pluggable type checking to turn nullness assumptions into compile-time checks that prevent Java null pointer exceptions.

• YouTube
• 52 minutes
• Self-Paced
• Conference Talk

Simple Rules for Writing Great Testcases

Ten practical rules for designing reliable test cases, from keeping each scenario focused to making test suites fast and maintainable.

• YouTube
• 52 minutes
• Self-Paced
• Conference Talk

Developing Microservices with Aggregates

Learn how domain-driven design aggregates bound microservices and support eventual consistency, with Sagas and event sourcing as alternatives to cross-service ACID transactions.

• YouTube
• 50 minutes
• Self-Paced
• Conference Talk

How to Create a New JVM Language

Create DevoxxLang by defining its grammar and semantics, building an interpreter, and exploring optimizations and JVM interoperability.

• YouTube
• 1 hour
• Self-Paced
• Conference Talk

Managing State with RxJava

Explore how to place and manage application state with RxJava to make Android app behavior more predictable and deterministic.

• YouTube
• 51 minutes
• Self-Paced
• Conference Talk

Architecting for Failures in Microservices

Use real-world outage examples to plan for failures across a service’s development, production, and post-production stages.

• YouTube
• 42 minutes
• Self-Paced
• Conference Talk