Not only I had the opportunity to hear Spring explained from the code committers but I managed to discuss some common architectural, managerial and leadership issues with other attendees.
The amount of work Spring helps to solve could be enough for four weeks of conference so there were mainly 4 slices (or tracks) of very related conferences from which you had to pick just one. Here are some comments about those that I attended.
Spring Integration. Practical Tips and tricksThe Spring Integration project is an attempt to implement the patterns described in the book Enterprise Integration Patterns Book by Gregor Hohpe and Bobby Wolf
It was a discussion about Consumers, Producers and the Publish/Subscribe pattern using AMQP channels and comparing them with JMS channels. Of course SOAP, REST and others are supported. Channel redundancy was presented Rabitt MQ and JSM. The project reminds me of ESB and indeed there was a mention to it. Basically Spring Integration is a different approach than ESB because there is no server needed but just patterns applied.