Update ui components from server event

Question

How would I go about updating a UI component when a server process finishes or anytime else for that matter?

Can\Should I

extend the UI component and register some kind of EventListener on it?
bind the UI component in a backing bean?
use some of the new PrimePush features?
something else?

If anyone could guide me in the right direction I'd appreciate it.

Example Case One

Server process ends and updates the database.
I want to automatically update a DataTable with new rows based on the new information.
I don't want to poll for the new data.

EDIT

I want to update the UI component (a primefaces datatable) from an EJB Stateless Bean

Possible duplicate of [How can server push asynchronous changes to a HTML page created by JSF?](https://stackoverflow.com/questions/3787514/how-can-server-push-asynchronous-changes-to-a-html-page-created-by-jsf) — Kukeltje, Aug 28 '17 at 11:06

score 1 · Answer 1 · answered Jul 26 '12 at 09:28

1

You didnt mention which version of primefaces you are using but you can update components from backed bean with addpartialupdatetarget.

RequestContext context = RequestContext.getCurrentInstance();
context.addPartialUpdateTarget("myForm:myComponent");

answered Jul 26 '12 at 09:28

HRgiger

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requestContext will be null if it is outside of a client-initiated request as was the case here – Kukeltje Aug 28 '17 at 11:07

score 0 · Answer 2 · answered Jul 25 '12 at 18:45

0

You can just use the update attribute of your commandButton or whatever else you're using.

Something like this should work

<p:dataTable value="#{backer.bean}" id="table">
  // columns with data
</p:dataTable>

<p:commandButton actionListener="#{backer.updateDB}" update="table" />

answered Jul 25 '12 at 18:45

Catfish

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How do I fire "click"/fire the commandButton from an EJB? Did you read the question correctly? If so could you expand on this solution. – feargal Aug 09 '12 at 14:26

Update ui components from server event

2 Answers2

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