Eugene Dvorkin provides an introduction to Storm framework, explains how to build real-time applications on top of Storm with Groovy, how to process data from Twitter in real-time, etc.
Cedric Champeau discusses the concept of traits introduced by Groovy 2.3. Traits look like interfaces, but allow the developer to add both implementation and state into it.
Peter Niederwieser shows how Spock can be used for integration testing of Spring applications, and how combining it with Geb yields a powerful solution for acceptance testing of web applications.
Graeme Rocher shows how one can leverage key technologies from the Groovy and Grails communities to become even more productive with Spring Boot.
Guillaume Laforge presents the latest Groovy 2.3 release with its new features and performance improvements: "traits", new markup-based template engine, new code transformations, and more.
Thomas Risberg introduces the Spring for Apache Hadoop project and discusses integration with Spring XD, batch jobs and external data sources.
Daniel Woods discusses Enterprise Operations which is seeing a shift in the management paradigm of infrastructure.
The authors demonstrate Apache Tomcat's stability under high load, describe some do's (and some don'ts!), explain how to performance test a Servlet-based application, etc.
Craig Walls presents the latest that Spring Social has to offer, including integration with Spring Security, automatic reconnect, and a dramatically simpler configuration model using Spring Boot.
The authors focus on POJO persistence over Cassandra, including automatic Cassandra schema generation and Spring context configuration using both XML and Java.
Roman Shaposhnik discusses more advanced features of HDFS, in addition to how YARN has enabled businesses to massively scale their systems beyond what was previously possible.
Rossen Stoyanchev overviews the areas in which the Spring framework has evolved along with highlights of specific noteworthy features from the most recent releases.