On Wed, Jan 3, 2018 at 4:30 PM, Thomas Mortagne <[email protected]> wrote:
On Wed, Jan 3, 2018 at 4:02 PM, Guillaume Delhumeau <[email protected]> wrote:
Hi devs.
In XWiki, we have the ability to create wiki components. It means that each extension can define a custom XClass which is used to create a component when a corresponding XObject exists.
Sometimes, this XObject contains a textarea where the developer could write velocity code. The velocity code is rendered, and the result is parsed in order to complete other actions. For example, velocity can render a boolean, or a list of documents, etc... The reason why Velocity is used is because it does not require programming rights. On the other-side, it can only return a string: the rendered content.
Actually this is not true, you can "return" anything you want using $output.setValue($someStuff).
actually $xcontext.method.output See http://extensions.xwiki.org/xwiki/bin/view/Extension/WikiComponent%20Module#...
My use-case is to generate a specific list of users when an event is triggered, to perform some actions with these users.
Currently, we have no recommended practice about this "velocity-rendered-fields".
That's what I propose to always use JSON when velocity is used to render data in a wiki component. The reason is that JSON is standard and easy to parse.
Use case: In the Event Stream module [1], the XClass "XWiki.EventStream.Code.EventClass" is used to trigger custom events when some event occurs. Example: if a DocumentUpdatedEvent is triggered and that event contains an XObject of type "Meeting", you can send a new "Meeting Created" event. There is a "Validation Expression" field used to determine either or not the custom event should be sent. Now I need to add an other field to determine which user should receive the event notifications. For example: if userA and userB have been invited to MeetingC, I need to send an event "Meeting Created" only for user A and user B.
Here is my +1,
Thanks,
[1] http://extensions.xwiki.org/xwiki/bin/view/Extension/Event%20Stream%20Module...
-- Guillaume Delhumeau ([email protected]) Research & Development Engineer at XWiki SAS Committer on the XWiki.org project
-- Thomas Mortagne
-- Thomas Mortagne