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This would appear to be a special case of batching properties across a large number of subscriptions. One could imagine any number of QOS or security properties, for example, that could be constant across a large number of subscriptions. Most of these would only matter at subscribe time, but the termination time property requires continual maintenance through the lifetime of the subscription. An obvious approach here would be to define a Session object, with its own lifecycle, holding properties which could be overridden by individual subscriptions. The subscriptions would have to be dependent objects of the session, garbage collected when the session goes away. --=_alternative 003E577885256E9E_= Content-Type: text/html; charset="US-ASCII" <br><font size=2 face="sans-serif">David:</font> <br><font size=2 face="sans-serif">Understood. Then in those scenarios, the NotificationProducer is likely to accept terminationTimes of extremely large duration and/or infinite duration.</font> <br><font size=2 face="sans-serif"><br> ++++++++<br> Steve Graham<br> (919)254-0615 (T/L 444)<br> STSM, On Demand Architecture<br> Member, IBM Academy of Technology<br> <Soli Deo Gloria/><br> ++++++++<br> </font> <br> <br> <br> <table width=100%> <tr valign=top> <td> <td><font size=1 face="sans-serif"><b>David Hull <dmh@tibco.com></b></font> <p><font size=1 face="sans-serif">05/21/2004 05:30 PM</font> <td><font size=1 face="Arial"> </font> <br><font size=1 face="sans-serif"> To: Steve Graham/Raleigh/IBM@IBMUS</font> <br><font size=1 face="sans-serif"> cc: Amelia A Lewis <alewis@tibco.com>, Don Mullen <donmullen@tibco.com>, Shivajee Samdarshi <shivajee@tibco.com>, wsn@lists.oasis-open.org</font> <br><font size=1 face="sans-serif"> Subject: Re: [wsn] Subscription termination and batched subscription</font></table> <br> <br> <br><font size=3>Steve Graham wrote:</font> <br><font size=2 face="sans-serif"><br> another approach is for the NP to describe (using Ws-Policy) some notion of typical or maximal (or minimal) subscription duration.</font><font size=3> <br> </font><font size=2 face="sans-serif"><br> with respect to lease renegotiation dominating message traffic, that is true if the duration of subscriptions was on the order of minutes. If this is typical, then this is a surprising policy choice and one that I personally would not recommend. Do you often see subscription durations of this small a period of time in your customer scenarios?</font><font size=3> </font> <br><font size=3>With, say, 10,000 subscriptions, 10,000 refreshes is four orders of magnitude more than one.<br> <br> This may be why there <i>is</i> no concept of subscription leasing in our customer scenarios.<br> </font> <br><font size=2 face="sans-serif"><br> sgg</font><font size=3> </font><font size=2 face="sans-serif"><br> <br> ++++++++<br> Steve Graham<br> (919)254-0615 (T/L 444)<br> STSM, On Demand Architecture<br> Member, IBM Academy of Technology<br> <Soli Deo Gloria/><br> ++++++++</font><font size=3><br> <br> <br> </font> <table width=100%> <tr valign=top> <td width=1%> <td width=18%><font size=1 face="sans-serif"><b>David Hull </b></font><a href=mailto:dmh@tibco.com><font size=1 color=blue face="sans-serif"><b><u><dmh@tibco.com></u></b></font></a><font size=3> </font> <p><font size=1 face="sans-serif">05/21/2004 03:06 PM</font><font size=3> </font> <td width=79%><font size=1 face="Arial"> </font><font size=1 face="sans-serif"><br> To: </font><a href="mailto:wsn@lists.oasis-open.org";><font size=1 color=blue face="sans-serif"><u>wsn@lists.oasis-open.org</u></font></a><font size=1 face="sans-serif">, Amelia A Lewis </font><a href=mailto:alewis@tibco.com><font size=1 color=blue face="sans-serif"><u><alewis@tibco.com></u></font></a><font size=1 face="sans-serif">, Shivajee Samdarshi </font><a href=mailto:shivajee@tibco.com><font size=1 color=blue face="sans-serif"><u><shivajee@tibco.com></u></font></a><font size=1 face="sans-serif">, Don Mullen </font><a href=mailto:donmullen@tibco.com><font size=1 color=blue face="sans-serif"><u><donmullen@tibco.com></u></font></a><font size=3> </font><font size=1 face="sans-serif"><br> cc: </font><font size=3> </font><font size=1 face="sans-serif"><br> Subject: [wsn] Subscription termination and batched subscription</font></table> <br><font size=3><br> <br> </font><font size=2><tt><br> Consider a use case wherein a Subscriber wishes to make a large number <br> of subscriptions with a given NotificationProducer. The subscriber <br> wishes to keep these open indefinitely, but the producer may or may not <br> wish to grant an indefinite lease.<br> <br>
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