Hi Peter,
The attributes from the parent Component aren't inherited by your
Application's context. Instead you need to do this:
public static void main(String[] args) {
// Create a new Restlet container and add a HTTP server connector
// to it
Component component = new Component();
component.getServers().add(Protocol.HTTP, 8182);
// Create a new application and attach the component
MyApp application = new MyApp(component.getContext());
component.getDefaultHost().attach("/base", application);
// Save away the URI prefix
Map<String, Object> restletAttributes =
application.getContext().getAttributes();
restletAttributes.put(MyApp.URI_KEY, arg[0]);
// Now, let's start the container!
try {
component.start();
} catch (Exception e) {
e.printStackTrace();
}
}
This should work beter!
Best regards,
Jerome
> -----Message d'origine-----
> De : news [mailto:[EMAIL PROTECTED] De la part de Peter Murray
> Envoyé : vendredi 20 avril 2007 17:59
> À : [email protected]
> Objet : Cannot get context attributes from downstream components
>
> I've read Jerome's message from earlier this year about using Context
> attributes to share application state among various Restlet components
> (http://osdir.com/ml/java.restlet/2007-01/msg00121.html) but I can't
> seem to get it to work. Here is the pieces of code -- first
> the main()
> program:
>
> public static void main(String[] args) {
>
> // Create a new Restlet container and add a HTTP server connector
> // to it
> Component component = new Component();
> component.getServers().add(Protocol.HTTP, 8182);
>
> // Save away the URI prefix
> Map<String, Object> restletAttributes =
> component.getContext().getAttributes();
> restletAttributes.put(MyApp.URI_KEY, arg[0]);
>
> // Create a new application and attach the component
> MyApp application = new MyApp(component.getContext());
> component.getDefaultHost().attach("/base", application);
>
> // Now, let's start the container!
> try {
> component.start();
> } catch (Exception e) {
> e.printStackTrace();
> }
> }
>
> "MyApp.URI_KEY" is a string constant to be the key of the value I'm
> trying to pass around. I'm setting up the Restlet to run either as a
> Java Application or in a Servlet container, so I've put the Router
> initialization pieces in MyApp.createRoot():
>
> @Override
> public Restlet createRoot() {
> Router router = new Router();
>
> Restlet getXml = new GetXml(getContext());
> router.attach("/getXml/{NS}:{OBJECTID}", getXml);
>
> Restlet getFullDisplay = new GetFullDisplay(getContext());
> router.attach("/getFullDisplay/{NS}:{OBJECTID}", getFullDisplay);
>
> Restlet trace = new Trace(getContext());
> router.attach("/trace", trace);
>
> return router;
> }
>
> For the sake of this question, I'm pretty sure you can ignore "NS" and
> "OBJECTID". Now here is the start of getFullDisplay.handle():
>
> public void handle(Request request, Response response) {
> StringBuilder pid = new StringBuilder();
> pid.append(request.getAttributes().get("NS"));
> pid.append(":");
> pid.append(request.getAttributes().get("OBJECTID"));
>
> // Get the URI prefix
> String baseUri = (String)
> getContext().getAttributes().get(MyApp.URI_KEY);
>
>
> At this point in the execution, baseUri is null. By all accounts,
> though, it should be the value of arg[0] passed in from the
> command line
> (or alternatively set as parameter in 'web.xml', but I haven't gotten
> that far yet in the code). Interestingly, I do get the correct values
> passed in for NS and OBJECTID.
>
> Any pointers on what I might be missing?
>
>
> Peter
> --
> Peter Murray
> http://www.pandc.org/peter/work/
> Assistant Director, New Service Development
> tel:+1-614-728-3600;ext=338
> OhioLINK: the Ohio Library and Information Network
> Columbus, Ohio
> The Disruptive Library Technology Jester
> http://dltj.org/
> Attrib-Noncomm-Share
> http://creativecommons.org/licenses/by-nc-sa/2.5/
