Without using root URL

Example code is available on github.com/vaadin-on-grails/rest-without-root.

If you need to provide REST API from your application and you do not want to provide that from other application, there is a way how to do it from Grails even if we run there Vaadin applications.

First thing if you want to have REST API, do not map any Vaadin UI on /* (root) url. If you have to use the root, check the next article "Using root URL for Vaadin app".

Step 1

Your mapping should like like this.

mapping = [
    "/admin/*": "app.AdminUI",
    "/client/*": "app.ClientUI"
]

Step 2

Then, we can add URL mapping into UrlMappings.groovy.

class UrlMappings {
    static mappings = {
        group "/rest", {
            "/$controller/$action?/$id?"()
        }
    }
}

Step 3

Create a controller grails create-controller app.ItemController and implement some logic there. For example, fetch some data from database and return it as JSON. In our example, we will just return a map, with dummy data, as JSON.

Step 4

Create two sample Vaadin UIs, so we can verify URL mapping.

Step 5

Start up the application and try out different URLs:

PreviousRESTNextUsing root URL for Vaadin app

Last updated

Was this helpful?