jsr356-experts@websocket-spec.java.net

[jsr356-experts] Re: Use of Session (add|remove|get)MessageHandler from annotated endpoint.

From: Mark Thomas <mark_at_homeinbox.net>
Date: Tue, 09 Apr 2013 22:17:30 -0400

On 03/04/2013 14:24, Joakim Erdfelt wrote:
> If you have an annotated endpoint via @ClientEndpoint or
> @ServerEndpoint, can you use the various Session MessageHandler calls?
>
> Session.addMessageHandler()
>
> This would seem to makes sense, but the rules for replacing a "native
> websocket message type" should still apply, right?
> So that if we have a @OnMessage annotated method with a TEXT type
> (such as String) then
> Session.addMessageHandler(MessageHandler.Whole<String>) shouldn't work.
>
> Session.removeMessageHandler()
>
> Should we be able to remove a @OnMessage annotated method?
> Perhaps by exposing these annotated methods a implementation specific
> MessageHandlers?
>
> Session.getMessageHandlers()
>
> Should this also list the annotated @OnMessage methods as
> MessageHandlers?
>
> It could be argued that it is confusing to have
> Session.addMessageHandler() fail with a reason that the the native
> websocket message type is already in use, but not have the means to
> remove the active one via removeMessageHandler(), or have the means to
> list them via getMessageHandlers().

or just not allow any of the Session MessageHandler calls in this case.

I have no strong views on this either way.

Mark