ACTIONSCRIPT 3.0

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Working with application domains
Stage
Application
Loader
A. Usage A B. Usage B C. Usage C
application1.swf
Loader
Loader
Loader
Module
Security domain: domain1.com
Application domain 1
Module
Application domain 2
mx.core.Application
application2.swf
mx.core.Application
module1.swf
Application domain 3
module3.swf
Module
The main application file is application1.swf. It contains Loader objects that load content from other SWF files. In this
scenario, the current domain is Application domain 1. Usage A, usage B, and usage C illustrate different techniques
for setting the appropriate application domain for each SWF file in an application.
Usage A Partition the child SWF file by creating a child of the system domain. In the diagram, Application domain 2
is created as a child of the system domain.The application2.swf file is loaded in Application domain 2, and its class
definitions are thus partitioned from the classes defined in application1.swf.
One use of this technique is to have an old application dynamically loading a newer version of the same application
without conflict. There is no conflict because although the same class names are used, they are partitioned into
different application domains.
The following code creates an application domain that is a child of the system domain, and starts loading a SWF using
that application domain:
var appDomainA:ApplicationDomain = new ApplicationDomain();
var contextA:LoaderContext = new LoaderContext(false, appDomainA);
var loaderA:Loader = new Loader();
loaderA.load(new URLRequest("application2.swf"), contextA);
Usage B: Add new class definitions to current class definitions. The application domain of module1.swf is set to the
current domain (Application domain 1). This lets you add to the application’s current set of class definitions with new
class definitions. This could be used for a run-time shared library of the main application. The loaded SWF is treated
as a remote shared library (RSL). Use this technique to load RSLs by a preloader before the application starts.
The following code loads a SWF, setting its application domain to the current domain:
Last updated 4/22/2013
B
C
A
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