I am trying to reuse some of my tiles in a controller which is returning a json response to the client. I would like to return a json response similar to the following format:

{ 
 'success': <true or false>,
 'response': <the contents of an apache tile>
}

In my controller I would like to perform logic similar to this pseudocode:

boolean valid = validator.validate(modelObj)
String response = ""
if(valid){
     response = successView.render() // im looking for a way to actually accomplish        
                                     // this, where the successView is the apache tiles view.
                                     // I would also need to pass a model map to the view somehow.
}else{
     response = errorView.render() 
}
writeJsonResponse(httpResponse, /* a Map whose json representation looks like the one I described above. */)