Reactive and Asynchronous Java Training in Hong Kong

  • Learn via: Classroom / Virtual Classroom / Online
  • Duration: 2 Days
  • Price: Please contact for booking options
We can host this training at your preferred location. Contact us!

Reactive and Asynchronous applications are growing in popularity, but what is the best way to build them? This course teaches you how to apply the latest concurrency techniques to develop state of the art Java applications. With the rise of Microservices and Service Oriented Architectures, asynchronous concurrency is now critical to day-to-day Java development.

We start off by reviewing the differences between asynchronous and synchronous programming. You then build upon this theory by refactoring a project using different modern concurrency techniques including promises using Java 8’s CompletableFuture, actors using Akka and reactive streams using RxJava. You’ll learn the good, the bad and the ugly between these approaches in terms of compositionality, testability and simplicity.


About the Trainers

Raoul-Gabriel Urma

Raoul-Gabriel Urma obtained a PhD in Computer Science from the University of Cambridge. He is co-author of the international bestselling book Java 8 in Action which sold over 20,000 copies in the world. Raoul is a regular conference speakers and delivered over 50 technical talks at international conferences. He has worked for large companies such as Google, eBay, Oracle, and Goldman Sachs, as well as for several startup projects.


Richard Warburton

Richard Warburton is an empirical technologist and solver of deep-dive technical problems. Recently he has written a book on Java 8 Lambdas for O’Reilly. He’s worked as a developer in many areas including Statistical Analytics, Static Analysis, Compilers and Networking. He is a leader in the London Java Community and runs OpenJDK Hackdays. Richard is also a known conference speaker, having talked at JavaOne, Devoxx, JFokus, DevoxxUK, Geecon, JAX London and Codemotion. He has obtained a PhD in Computer Science from the University of Warwick.


Code examples and exercises will be written in Java 8 so a basic knowledge of Java 8 is required

  • Understand various models of concurrency and asynchronous programming
  • Explore and develop applications using the Actor model and Akka
  • Learn how develop and test Promises and CompletableFutures
  • Develop reactive applications using RxJava

Asynchronous vs Synchronous Programming

  • Servlets
  • Asynchronous Servlets (3.0) and Spring
  • Why use asynchronous communications?
  • Solving the C10K Problem and the Microservices Performance problem
  • The full stack - from application right down to the OS
  • Timeouts
  • The Reactive Manifesto
  • Models of Concurrency: Event Based, Promises, The Actor Model, Reactive Streams

Promises using CompletableFutures

  • Executor and Future
  • CompletableFuture
  • Composition patterns
  • Asynchronous Timeouts
  • Exception handling
  • Testing

The Actor Model with Akka

  • Why and when would you use Actors?
  • What are Actors?
  • Using Akka
  • Testing actors

Reactive Streams with RxJava

  • Introducing Reactive Streams
  • Using RxJava
  • Pull vs. Push models
  • Threading and Back Pressure
  • Connecting Reactive streams to databases and web sockets
  • Java 9 Flow API
  • Alternative Reactive Stream Implementations


Contact us for more detail about our trainings and for all other enquiries!

Upcoming Trainings

Join our public courses in our Hong Kong facilities. Private class trainings will be organized at the location of your preference, according to your schedule.

Classroom / Virtual Classroom
03 June 2024
Hong Kong, Kowloon, Tsuen Wan
2 Days
Classroom / Virtual Classroom
18 July 2024
Hong Kong, Kowloon, Tsuen Wan
2 Days
Classroom / Virtual Classroom
02 August 2024
Hong Kong, Kowloon, Tsuen Wan
2 Days
Classroom / Virtual Classroom
01 August 2024
Hong Kong, Kowloon, Tsuen Wan
2 Days
Classroom / Virtual Classroom
03 August 2024
Hong Kong, Kowloon, Tsuen Wan
2 Days
Classroom / Virtual Classroom
14 August 2024
Hong Kong, Kowloon, Tsuen Wan
2 Days
Classroom / Virtual Classroom
17 September 2024
Hong Kong, Kowloon, Tsuen Wan
2 Days
Classroom / Virtual Classroom
23 September 2024
Hong Kong, Kowloon, Tsuen Wan
2 Days
Reactive and Asynchronous Java Training Course in Hong Kong

Hong Kong is officially known as the Hong Kong Special Administrative Region of the People's Republic of China (HKSAR) and is a city and special administrative region of China on the eastern Pearl River Delta in South China. Hong Kong is one of the most densely populated places in the world, with over 7.5 million population. The official languages of the HKSAR are Chinese and English. Hong Kong is a highly developed territory and ranks fourth on the United Nations Human Development Index and the residents of Hong Kong have the highest life expectancies in the world.

The best time to visit Hong Kong is from September to December, since the temperatures, averaging between 19 to 28 degree Celsius. During this outdoor activities-friendly travelling season, you can take a walk along Victoria Harbour, visit the islands of Lantau, Lamma and Cheung Chau and participate in the Mid-Autumn Festival. Top choices of the tourists to visit in Hong Kong are Big Buddha statue, Wong Tai Sin Temple, Repulse Bay and the Beaches and Hong Kong Disneyland.

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