Spring ActionScript is an inversion of control container for ActionScript 3.0 that is based on the Java Spring framework. It allows defining application components and dependencies in an XML file and manages object lifecycles through dependency injection. The IOC container handles creating and assembling objects defined in external XML files and loaded at runtime, allowing centralized dependency management and different application configurations without recompiling code.

1. Christophe Herreman www.herrodius.com <Flex:Camp/> Belgium 11 December 2008 Prana goes Spring Introducing Spring ActionScript

9. What is an IoC Container ? Creates and assembles components/objects and manages their lifecycle. Spring ActionScript uses an XML dialect to define the “application context” (what objects are available and how they are related) June 6, 2009 Spring ActionScript | <flex:camp/> Belgium

10. The Application Context // setter injection <objects> <object id=“instance” class=“MyClass”> <property name=“dependency” ref=“dependency”/> </object> <object id=“dependency” class=“ConcreteDependency”/> </objects> June 6, 2009 Spring ActionScript | <flex:camp/> Belgium

11. The Application Context // constructor injection <objects> <object id=“instance” class=“MyClass”> <constructor-arg ref=“dependency”/> </object> <object id=“dependency” class=“ConcreteDependency”/> </objects> June 6, 2009 Spring ActionScript | <flex:camp/> Belgium

12. Working with the IoC container <mx:Application xmlns:mx=&quot;http://www.adobe.com/2006/mxml&quot; creationComplete=&quot;onCreationComplete()“> ... private function onCreationComplete():void { _applicationContext = new FlexXMLApplicationContext(“application-context.xml”); _applicationContext.addEventListener(Event.COMPLETE, onApplicationContextComplete); _applicationContext.load(); } private function onApplicationContextComplete(event:Event):void { var instance:MyClass = _applicationContext .getObject(“instance”); } ... </mx:Application> June 6, 2009 Spring ActionScript | <flex:camp/> Belgium

16. Questions?