[SOLVED] Restlet obtaining Application

Restlet obtaining Application

In Restlet 2.3 what is the recommended way of obtaining an Application?

The docs suggest there is a static method Application.getCurrent() that implies that it is possible to obtain the executing Application. However, this requires the call to be made from the executing Application.

Say I had several applications and they are all running:

public class ApplicationA extends Application {...}

public class ApplicationB extends Application {...}

Is it possible to obtain Application for ApplicationA from ApplicationB?

Solution

It depends on the way you configured your Restlet "application" but since you define your routing based on application instances, you could inject one into other one, as described below:

Component c = new Component();
(...)

MyApplication1 app1 = new MyApplication1();
c.getDefaultHost().attach("/app1", app1);

MyApplication1 app2 = new MyApplication2(app1);
c.getDefaultHost().attach("/app1", app2);

(...)

You can notice that you can also introspect your application at runtime. The APISpark extension of Restlet does something like that. See class org.restlet.ext.apispark.internal.introspection.application.ComponentIntrospector and org.restlet.ext.apispark.internal.introspection.application.ComponentIntrospector.

Why do you need such feature in your application? Just to be sure to give the right answer ;-)

Edited

You can reach a sample application for your use case at the address https://github.com/templth/restlet-stackoverflow/tree/master/restlet/test-restlet-application-manager.

Hope it helps you, Thierry