You can also handle POST events by injecting the request:
@Inject
private Request request;
And then responding the the event (in my case, "generateJSON"):
JSONObject onGenerateJSON()
{
int displayLength =
Integer.valueOf(request.getParameter("iDisplayLength"));
int displayStart =
Integer.valueOf(request.getParameter("iDisplayStart"));
...
}
mrg
On Thu, Dec 9, 2010 at 6:47 AM, Richard Hill <r...@su3analytics.com> wrote:
>
> If you want to make an ajax call from your own javascript you can do the
> following (T5.1). In this example we just stick the value you want to
> cache in an @Persist'd field.
>
> In your page/component .java:
>
> @Persist
> private String valueToStore;
>
> public StreamResponse onYourEventName(String valueToStore) {
> this.valueToStore = valueToStore;
> return new StreamResponse("text", valueToStore + " was persisted";
> }
>
> Now your javascript just needs to make a normal ajax GET request to:
>
> /yourpage:youreventname/valueToStore
>
> which in this case will (hopefully) just return the confirmation
> message. You can also use JSONObject to construct json arrays to return
> as well if you want to update any data on your page.
>
> You can use ComponentResources to create event links too which can be
> added to your .tml and read by javascript if you wish:
>
> public String getMyEventLink() {
> String context = ...;
> Link l = componentResources.createEventLink("YourEvent", context);
> return l.toString();
> }
>
> ... ${myEventLink} ...
>
> Hope that helps,
>
> Richard.
>
>
>
> -----Original Message-----
> From: Thiago H. de Paula Figueiredo <thiag...@gmail.com>
> Reply-to: "Tapestry users" <users@tapestry.apache.org>
> To: Tapestry users <users@tapestry.apache.org>
> Subject: Re: Calling the Tapestry server from plain Javascript
> Date: Wed, 08 Dec 2010 21:07:51 -0200
>
> On Wed, 08 Dec 2010 20:55:27 -0200, Tim Koop <t...@timkoop.com> wrote:
>
>> I have a pile of Javascript on my page (it's a component really), and
>> sometimes it comes up with a value it needs to store on the server (in a
>> SessionState or something). Can someone please tell me the best way to
>> call the server from plain Javascript?
>
> Create an event and pass its URL (created from
> ComponentResources.createEventLink()) to your JavaScript code. Create a
> event handler method for it. Request it using normal AJAX code from the
> JavaScript side. If you need to return JSON, just return an JSONObject or
> JSONArray instance in the event handler method. This works for pages,
> componentes and mixins in the same way.
>
>
>
>
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