First of all, I would like to thank my family. I dedicate this book to Tamara, my wife, and Sofia, my daughter. Their support through all the book writing process is what kept me going and confident. They are the most important part of my life.

I would also like to thank the excellent team at Packt Publishing, whose guidance throughout the book writing process has been invaluable.

I would also like to thank all the people I worked with at Plugtree and the JBoss community, with whom and for whom I had to investigate so many new features of this beautiful framework—which helped me gather the knowledge to write this book. A special thank you to Mauricio Salatino and Diego Naya, founder of Plugtree, for believing in me, and thanks to all the companies that pushed us to investigate new features every day—Multi-Support, iHealth, the Sura Group, and many others who prefer no mention, but are pushing the edge of technology in so many ways.