CODEWITHSUNDEEP
c++xpcomxulrunner
user12707
user12707

Reputation: 304

Callback with XPCOM

I would like to implement the observer pattern similar to Timer component. Instead of calling a callback by time expiration, the callbacks that are observers of a topic would be called from system events (like new file created, or a new e-mail received, etc.). I tried using nsIObserverService in the component XPCOM, but it seems that functions from component aren't able to call observers in JavaScript by using NotifyObservers. The NotifyObservers only works when is called from JavaScript.

Thanks in advance

Upvotes: 0

Views: 328

Answers (1)

Neil
Neil

Reputation: 55402

Example::Example always runs on the main thread (because it's being created by your script). So it never creates a proxy to the observer service. But the call to Example::Call from Ex::Run happens on the background thread, and I think in this case the call to NotifyObservers returns NS_ERROR_UNEXPECTED (which you ignore).

Upvotes: 1

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