Thursday, February 26, 2015

Re: JSO: Why does this fail?

On Thursday, February 26, 2015 at 4:21:33 PM UTC+1, Thomas Broyer wrote:

On Thursday, February 26, 2015 at 2:59:43 PM UTC+1, Mickaël Leduque wrote:
So the answer to
When use it ? When not use it ?

is respectively always and never ? That's easy to follow, thanks!

Hmm, no. If your JSNI calls back into Java "synchronously", then you don't need to use $entry (exceptions will still "bubble" up to your GWT.UncaughtExceptionHandler Java→JSNI→Java, and you're still in the same event-loop wrt scheduled commands). You use $entry() whenever the browser calls back into your GWT/Java code "asynchronously" (event handling, promises, etc. basically whatever comes from the browser's own event loop).

Basically, whenever you pass a "callback" to be called "later", decorate it with $entry().

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