package MyApp::Controller::Item;
use Moose;
use namespace::autoclean;

BEGIN { extends 'Catalyst::Controller'; }

# RESTful API (Consumes type action) support by Catalyst::Runtime 5.90050 higher
__PACKAGE__->config(
    action => {
        '*' => {
            Consumes => 'JSON',
            Path => '', 
        }   
    }   
);


# Get info on a specific item
# GET /item/:item_id
sub lookup :GET Args(1) :Does(JSV) :JSONSchema(root/schema/lookup.json) {
    my ( $self, $c, $item_id ) = @_;
    my $params = $c->request->parameters;
    ...
}


# lookup.json (json schema draft4 validation)
{ 
    "title": "Lookup item",
    "type": "object",
    "properties": {
        "item_id": { 
            "type": "integer",
            "minLength": 1,
            "maxLength": 9, 
            "captureargs": 1  # In the case of URL CaptureArgs
        },   
        "paramX": { 
            "type": "string",
            "minLength": 8,
            "maxLength": 12  
        }, 
    },  
    "required": ["item_id"]
} 

$c->stash->{'View::JSON expose_stash key'} = {message => 'JSV->validate->get_error'}

name: MyApp
View::JSON:
    expose_stash: 'json'