[Ace-users] Re: [tao-bugs] Notify_Service subscription management

[Johnny Willemsen]

Hi Hans,

Can you also file this one in bugzilla?

Johnny

>        TAO VERSION: 1.5.10
>        ACE VERSION: 5.5.10
> 
>        HOST MACHINE and OPERATING SYSTEM: Linux RH WS 4
>        COMPILER NAME AND VERSION (AND PATCHLEVEL): gcc 3.4.6
> 
>        THE $ACE_ROOT/ace/config.h FILE:
>          config-linux.h
>        THE $ACE_ROOT/include/makeinclude/platform_macros.GNU FILE:
>          platform_linux.GNU
> 
>        AREA/CLASS/EXAMPLE AFFECTED: Notification Service
> 
>        DOES THE PROBLEM AFFECT:
>             EXECUTION
> 
>        SYNOPSIS:
> 
> StructuredPushSupplier::subscription_change not called when 
> subscription 
> is removed.
> 
>       DESCRIPTION:
> 
> A StructuredPushSupplier implementation, connected to the 
> notification 
> service gets correctly called its subscription_change() 
> method, with the 
> correct added events list, when a consumer subscribes for an event. 
> When, the subscription is removed, though, 
> subscription_change() is not 
> called.
> 
> The subscription management internally seems to keep track 
> correctly of 
> the events subscribed. When multiple consumers subscribe for the same 
> event and are stopped one by one afterwards, the event type vanishes 
> from the list returned by 
> ProxyPushSupplier::obtain_subscribed_types() 
> at the  right time. As yet another data point: The offer management 
> works correctly for adding and removing offers for the test 
> cases I came 
> up so far.
> 
>        SAMPLE FIX/WORKAROUND:
> 
> (1) Test for subscriptions by using 
> ProxyPushSupplier::obtain_subscribed_types() to test if consumers are 
> still interested in an event type.
> (2) Just produce the events unconditionally.
> 
> Cheers,
> Hans
> 
> -- 
> Hans Utz - USRA/RIACS at NASA Ames
> I do not speak for NASA, and NASA does not speak for me.
> 
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