William Markito Oliveira has more than 15 years of experience in software development, including solution architecture and consulting. For the last few years, he had focused on Service Oriented Architecture (SOA) solutions, Enterprise Application Integration (EAI), and system optimization. Currently, he is looking into cloud systems with specific focus on in-memory data grid and Java EE. He is also a member of the Java EE Tutorial documentation team, helping with write-ups and code examples about new Java EE technologies and can be reached at Twitter (@william_markito) or through his blog, https://blog.markito.info. He has authored another book, The Java EE 6 Tutorial: Advanced Topics, Fourth Edition, Addison-Wesley Professional, 978-0-13708-186-8.