We've pushed a version of AeroGear Controller with support for request parameters (AEROGEAR-671) to openshift.

This demo has the following new route added to it:

route()
      .from("/cars")
      .on(RequestMethod.GET)
      .produces(MediaType.JSON.toString(), "application/custom")
      .to(Home.class).get(param("color", "pink"), param("brand", "mini"));

The target method for the above route is named get and takes two parameters, color, and brand. Both parameters are option and if not specified the default values will be used (pink is the default value for color, andmini is the default value for brand).

Home.class has a new method named get:

public Car get(String color, String brand) {
      return new Car(color, brand);
}

You can try these out using the examples below:

Example of specifying both query parameters:

curl -i --header "Accept: application/json" "http://controllerdemo-danbev.rhcloud.com/aerogear-controller-demo/cars?color=Red&brand=Ferrari"

Example of specifying one query parameter:

curl -i --header "Accept: application/json" "http://controllerdemo-danbev.rhcloud.com/aerogear-controller-demo/cars?color=Red"

Example of specifying no query parameters:

curl -i --header "Accept: application/json" "http://controllerdemo-danbev.rhcloud.com/aerogear-controller-demo/cars"

Example of returning a custom media type:

curl -i --header "Accept: application/custom" "http://controllerdemo-danbev.rhcloud.com/aerogear-controller-demo/cars?color=Gray"

A custom media type is an example of a custom responder in AeroGear Controller. In this case it only returns a string but could really do anything needed with the object returned from the target method.

public class CustomMediaTypeResponder extends AbstractRestResponder {

    public static final String MEDIA_TYPE = "application/custom";

    public CustomMediaTypeResponder() {
        super(MEDIA_TYPE);
    }

    public void writeResponse(Object entity, RouteContext routeContext) 
        throws Exception {
        routeContext.getResponse().getWriter().write("CustomMediaTypeResponder returned: " + entity);
    }

    @Override
    public String mediaType() {
        return MEDIA_TYPE;
    }

}

Please try this out, and if you find any issue let us know, or simply create jira bug reports.

Thanks,

/Dan