[aerogear-dev] HTML View Responder

[Matthias Wessendorf]

nice ! I like that !

+1

On Fri, Dec 21, 2012 at 3:34 PM, Daniel Bevenius
<daniel.bevenius at gmail.com> wrote:
> Hi,
>
> I'm working on AEROGEAR-693 and trying to figure out how to implement this
> in the best way.
>
> At the moment, the default type of ViewResponder is the MvcResponder which
> forwards to a JSP page. By default, this means that if you do not specify a
> produces() method on a route, this is what you'll get.
>
> Now, the media types that are passed to the produces() method determine two
> things: 1. How to match to Route that is the target of a request, matching
> the HTTP Accept header. 2. Determining the ViewResponder to be used.
>
> The issue here is that for both a HTMLResponder and a JSPResponder the media
> type would in both cases betext/html.
> How do we determine which one the users actually has created a view for (jsp
> or html page)?
>
> Well, we need some way to differantiate between a route that will respond
> with a html view, but which uses a ceratain technique to render the html.
>
> How about a introduce a type, MediaType that looks something like this:
>
> public class MediaType {
>
>     public static final String HTML = "text/html";
>     public static final String ANY = "*/*";
>     public static final String JSON = "application/json";
>
>     private final String mediaType;
>     private final Class<? extends Responder> responderClass;
>
>     private MediaType(final String mediaType, Class<? extends Responder>
> responderClass) {
>         this.mediaType = mediaType;
>         this.responderClass = responderClass;
>     }
>
>     public String getMediaType() {
>         return mediaType;
>     }
>
>     public Class<? extends Responder> getResponderClass() {
>         return responderClass;
>     }
>
>     @Override
>     public String toString() {
>         return "MediaType[type=" + mediaType + ", responderClass=" +
> responderClass + "]";
>     }
>
>     public static MediaType html() {
>         return new MediaType(HTML, HtmlViewResponder.class);
>     }
>
>     public static MediaType jsp() {
>         return new MediaType(HTML, JspViewResponder.class);
>     }
>
>     public static MediaType json() {
>         return new MediaType(JSON, JsonResponder.class);
>     }
>
> }
>
> And we could add html(), jsp(), and json() methods to AbstractRoutingModule,
> so a route that should be handled by a HtmlViewResponder would look like
> this:
>
> route()
>       .from("/plain")
>       .on(RequestMethod.GET)
>       .produces(html())
>       .to(Html.class).index();
>
> To be backward compatible, if a produces() method was not specified it would
> be the same as specifying:
>
>       .produces(json())
>
>
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>



-- 
Matthias Wessendorf

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