Re: [ws-dd] Issue 026 - DPWS - WS-Eventing does not work when subscriberin not addressable

[Antoine Mensch <antoine.mensch@odonata.fr>]

Additional info:
Impact: Spec extension, implementation change
Urgency: High
Priority: High


Ram Jeyaraman a écrit :
> This issue is assigned the number 026. For further discussions on this issue, please refer to this issue number or use this thread.
>
> -----Original Message-----
> From: Antoine Mensch [mailto:antoine.mensch@odonata.fr]
> Sent: Tuesday, September 16, 2008 4:36 PM
> To: Ram Jeyaraman
> Subject: NEW Issue - WS-Eventing does not work when subscriber in not addressable
>
> Please defer discussions on this issue until a time this issue is
> accepted and is assigned a number.
>
> Document: DPWS
> Location (defaults to line number): WS-Eventing
> Owner: Antoine Mensch
>
> Description:
> The current WS-Eventing mechanism selected by DPWS is based on a push
> mechanism which requires the event source to connect to the subscriber
> to deliver the event notification. This creates problems in to very
> common cases: (i) when the subscriber is behind a firewall using NAT;
> (ii) when the subscriber is a Web application (e.g. Ajax or Java, Flash
> or Silverlight applets) which cannot accept incoming connections.
>
> Proposed resolution:
> It would be very useful to design a mechanism allowing event sources to
> use long-lived connections established by the subscriber to deliver the
> event notifications.
>
>
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