Mert Caliskan is a software stylist living in Ankara, Turkey. He has more than 10 years of expertise in software development with the architectural design of Enterprise Java web applications. He is an advocate of open source for software projects such as PrimeFaces and has also been a committer and founder of various others. He is the coauthor of the first edition of this book. He is also the coauthor of Beginning Spring by Wiley Publications. He is the founder of AnkaraJUG, which is the most active JUG in Turkey that has been having monthly meetups for 3 years now. In 2014, he was entitled a Java Champion for his achievements. He is also a Sun Certified Java professional since 2007. He does part-time lecturing at Hacettepe University on enterprise web application architecture and web services. He shares his knowledge at national and international conferences, such as JDays 2015, JavaOne 2013, JDC2010, and JSFDays'08. You can reach Mert via twitter at @mertcal. Oleg Varaksin is a senior software engineer living in the Black Forest, Germany. He is a graduate computer scientist who studied informatics at Russian and German universities. His main occupation and "daily bread" in the last 10 years has consisted of building various web applications based on JSP, JSF, CDI, Spring, web services, REST, jQuery, AngularJS, and HTML5. He has a deep understanding of web usability and accessibility. Oleg is an experienced JSF expert and has been working with the PrimeFaces library since its beginning in 2009. He is also a well-known member of the PrimeFaces community and a cocreator of the PrimeFaces Extensions project on additional JSF components for PrimeFaces. Besides the aforementioned technologies, he has worked as a frontend developer with many other web and JavaScript frameworks-Struts, GWT, Prototype, YUI library, and so on. He also implemented an AJAX framework before all the hype about AJAX began. Oleg normally shares the knowledge he has acquired on his blog at http://ovaraksin.blogspot.de.