I have created an Spring connector for DirectJNgine, spring-djn which is currently in alpha!
This connector will integrate Spring into DirectJNgine, making it possible to use Spring beans as Ext Direct actions. This means that you will be able to get the benefits of Spring built-in lifecycle support. Besides, you will be able to inject Spring beans into your own action classes, greatly simplifying Spring usage with ExtJs.
The beta version of spring-djn should be made public in two to three weeks.