I would pass the conversation object that should be notified as method parameter but if the user closes his/her browser then the conversation data becomes useless.
i'm interested to know which better way in this case... If you find out it, share for us.
Thanks for your response... This is the way I'm currently doing, but this looks a bit like a hack to me, so I was interested to find out if there is a better way for this, or a
Even if the user closes browser window, the conversation will not timeout right away. The timeout for my async call is anyway lower than conversation timeout, so this case should not represent a problem (at least for me)