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.NET Forum / .NET Framework / Component Services / August 2005JITA And Object Pooling
Hey, I have a ServicedComponent that is configured to support Object Pooling and Just In Time Activation. I have the following code that uses my ServicedComponent: Public Sub Test() dim objSC as MyServicedComponent objSC = New MyServicedComponent objSC.Method() End Sub Oridnary I would call DisposeObject to release the object, but since this object is JITA, should I call DisposeObject or not? Thanks ahead --Ram Ram, > I have a ServicedComponent that is configured to support Object Pooling > and Just In Time Activation. [quoted text clipped - 8 lines] > Oridnary I would call DisposeObject to release the object, but since > this object is JITA, should I call DisposeObject or not? No, you shouldn't. In fact, if the object has deactivated itself (through any of the possible ways it can do this) and you call Dispose(), you'll force a new activation which will just attend the Dispose() call! (yes, I find this totally unintuitive as well!)  SignatureTomas Restrepo tomasr@mvps.org http://www.winterdom.com/ Tomas hey thanks for replying, The thing is, I defined my ServicedComponent as JustInTimeActivation(true) and at every method I need, I defiend: ContextUtil.DeactivateOnReturn=true And defined the min pool size to 5 and max to 10. And all is well - when I look at the component services manager (MMC) I see that after each call the number of objects activated returns to 0 all the time, but the number of object just keeps on increasing. Doesnt the JITA returns my objects to the pool after each deactivation? Thanks again --Ram Ram, > The thing is, I defined my ServicedComponent as > JustInTimeActivation(true) [quoted text clipped - 5 lines] > all the time, but the number of object just keeps on increasing. > Doesnt the JITA returns my objects to the pool after each deactivation? Yes, it does. If it didn't, you'd deadlock when the pool reached the maximum size. What you see is that the "Objects" statistic in the component services manager doesn't actually mean number of objects, but rather the existing number of connections; that is, the number of client side stubs connected to the application, whether they are attached to an active object or not. What you see is that you're probably ending up creating stubs even if they are not needed, and those will drop after a gc (that happens because you're not reusing the client side references to the objects bur rather discarding them). SignatureTomas Restrepo tomasr@mvps.org http://www.winterdom.com/ Does the number of connections affects the performance of my serviced component? If not, does is affect it at all? And about not reusing the client side references to the object - I have an ASP.Net web app that uses my JITA enabled serviced component on each postback to the server. How can I reuse the connection? hold a static instance to the object? or am I missing the point? Thanks again for your help! Ram Ram, > Does the number of connections affects the performance of my serviced > component? It shouldn't (at least not too bad, those will be taken care of by the GC). > If not, does is affect it at all? > And about not reusing the client side references to the object - I have > an ASP.Net web app that uses my JITA enabled serviced component on each > postback to the server. > How can I reuse the connection? You reuse the connection by using the same client side proxy reference you had to do another call after the object has been deactivated; when you do that, COM+ automatically activates another object and attaches it to the connection you had, transparent to the caller. That said, you can't use a single one in a static variable for all your calls... SignatureTomas Restrepo tomasr@mvps.org http://www.winterdom.com/ Tomas I'm sorry for the big delay, but I just want to tell you a HUGE thanks! You'v made clear what a few books and more than a couple of MS support guys couldnt explain... So again, thanks for "helping the community at times of need" ;) Yours Ram Ram, > Tomas I'm sorry for the big delay, but I just want to tell you a HUGE > thanks! > You'v made clear what a few books and more than a couple of MS support > guys couldnt explain... > So again, thanks for "helping the community at times of need" ;) Hey, I'm happy to help :) SignatureTomas Restrepo tomasr@mvps.org http://www.winterdom.com/
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