Creating PrimeFaces dialog dynamically in JavaScript and passing some data

Question

I am working on a simple messenger using JSF and PrimeFaces. I would like to have contact list in the right part of the window and multiple conversation dialogs in the second part. Dialog will contain just a send button, an input and conversation content.

Use case:

User #1 clicks on contact, chat dialog appears. User #2 is logging to system. System checks that he has 1 unread message so it opens chat dialog. User #2 clicks on another contact and second chat dialog appears.

Questions:

How to pass some context to dialog like user-you-are-writing-to's ID so when you click on send button in this particular dialog you will be able to access it?
Is it possible to create a PrimeFaces dialog dynamically from JavaScript> Or maybe there is better solution to do it?

spauny · Accepted Answer · 2011-11-28 08:27:19Z

1

To create a chat application you have to use a Push Server (and WebSockets) which would be the best solution because you have to create a channel between the user/client and the server (since a simple request is stateless) - and that's what push does. PrimeFaces Push uses a servlet as a dispatcher. This servlet should be in a different application than the JSF application and at the moment can only be deployed on jetty server.

You could read about this in Primefaces UserGuide 3.0.M4: http://www.primefaces.org/documentation.html and see this implementation in showcase: http://www.primefaces.org/showcase-labs/push/chat.jsf

Another implementation/example: http://java.dzone.com/articles/creating-websocket-chat

answered Nov 28, 2011 at 8:27

spauny

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2 Comments

rotman Over a year ago

Well, you doesn't really answer my questions. Messenger is just a context of my problem which is creating dialogs from JavaScript. By the way, thank you for the information you provided but I think for a little number of users, storing messages in database and using ajax poll in client would be enough.

spauny Over a year ago

@rotman strictly to your problem, you do not have to create a dialog dynamically...you just have to implement a dialog component and show it everytime you need(some render attribute set to false and an update would be enough)...explain me more, if I haven't understood you problem.

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