Jim Crossley introduces Immutant – an application server for Clojure, inspired by TorqueBox and powered by JBoss AS7 –, showing a demo application, how to use it, and exploring its API.
Lance Ball presents DataMapper, a Ruby ORM library, along with Infinispan, Hibernate Search, Lucene, all running on JBoss AS7 and accessed through TorqueBox, a JRuby application server.
Mark Little presents the constituents of a modern SOI and where open source implementations stand in terms of standards, tools, ease of use, performance and reliability, making a case for using open source against close source solutions.
Dan North discusses an example of rearchitecting an application without rewriting it from scratch, and explains general strategies for a holistic rearchitecture such as changing the team culture, removing obsolete technologies, allowing mistakes to be made (and learned from), transitional architectures, introducing bounded contexts, refactoring and emergent simplicity, and rotating through roles.
In this presentation from QCon London, William Soo and Meeraj Kunnumpurath discuss the Voca transaction processing system architecture, the previous Mainframe-based architecture, architectural challenges and requirements, the new Spring and J2EE-based architecture, upcoming challenges for Voca, and technologies to watch for in the future.
Ernie Svehla, Chief Architect of IntelliObjects reviews Java Class Loading basics, comparing the class loading architectures of the Sun's Appserver 9, BEA WebLogic 9.1, and JBoss 4.0.2. The presentation concludes with a discussion of best practices for packaging JEE applications followed by techniques for resolving common class loading problems such as ClassNotFoundException, or NoDefFound Errors.