[Ace-users] Re: [tao-users] Event Service and Consumers/Suppliers with persistentIORs

[Douglas C. Schmidt]

Hi Markus,

Thanks for providing the PRF info.  Please upgrade to ACE+TAO+CIAO
x.5.10 (i.e., ACE 5.5.10, TAO 1.5.10, and CIAO 0.5.10), which you can
download from

http://download.dre.vanderbilt.edu

under the heading: "Latest Beta Kit".

The DOC groups at Washington University, UC Irvine, and Vanderbilt
University only provide "best effort" support for non-sponsors for the
latest release, as described in

http://www.dre.vanderbilt.edu/~schmidt/DOC_ROOT/ACE/docs/ACE-bug-process.html

Thus, if you need more "predictable" help for earlier versions of
ACE+TAO, I recommend that you check out

http://www.dre.vanderbilt.edu/support.html

for a list of companies that will provide you with ACE+TAO commercial
support.

Thanks,

        Doug

>sorry, here the missing information.
>
>TAO VERSION: 1.5
>ACE VERSION: 5.5
>
>HOST MACHINE and OPERATING SYSTEM:
>2 x Intel(R) Xeon(R) CPU 3.00GHz
>Linux 2.6.16.46-0.12-smp #1 SMP i386 GNU/Linux
>
>TARGET MACHINE and OPERATING SYSTEM, if different from HOST:
>COMPILER NAME AND VERSION (AND PATCHLEVEL):
>gcc version 3.4.3
>
>DOES THE PROBLEM AFFECT:
>    COMPILATION?
>        No.
>    LINKING?
>        No.
>    EXECUTION?
>        Yes.
>
>SYNOPSIS:
>Event Service and Consumers/Suppliers with persistent IORs
>
>DESCRIPTION:
>see below
>
>SAMPLE FIX/WORKAROUND:
>see below
>
>Johnny Willemsen wrote:
>> Hi,
>>
>> Please use the PRF form, we now don't know which TAO version you are using
>> which can influence the answer.
>>
>> Regards,
>>
>> Johnny Willemsen
>> Remedy IT
>> Postbus 101
>> 2650 AC  Berkel en Rodenrijs
>> The Netherlands
>> www.theaceorb.nl / www.remedy.nl  
>>
>> *** Integrated compile and test statistics see
>> http://scoreboard.theaceorb.nl ***
>> *** Commercial service and support for ACE/TAO/CIAO             ***
>> *** See http://www.theaceorb.nl/en/support.html                 *** 
>>
>>   
>>> I have a question concerning the use of the Event Service in 
>>> combination 
>>> with consumers/suppliers that use persistent IORs.
>>>
>>> My principal idea was to use consumers/supplier with 
>>> persistent IORs in 
>>> order to prevent a multiple registration of a 
>>> consumer/supplier crashed. 
>>> When restarted the reregistration results in a lot of exceptions when 
>>> the Event Service is trying to sent out consumers which not 
>>> valid anymore.
>>>
>>> Although the IORs of consumers/suppliers are persistent the Event 
>>> Service handles them as a registration of a new 
>>> consumers/suppliers. In 
>>> case of consumers, this results in receiving all events twice. This 
>>> proves to me that both IORs are still valid. But for some reason the 
>>> Event Service does not throw an 'AlreadyRegistered' exception when 
>>> reregistering after a crash.
>>>
>>> I worked around this using transient IORs and letting the 
>>> Event Service 
>>> monitor broken links. This does very much the same except that the ES 
>>> needs one exception to notify that the llink is broken.
>>>
>>> I wonder why my approach using persistent IORs does not work.  Has 
>>> someone similar experience?
>>>
>>> Kind regards
>>> Markus
>>>
>>> _______________________________________________
>>> tao-users mailing list
>>> tao-users at mail.cse.wustl.edu
>>> http://mail.cse.wustl.edu/mailman/listinfo/tao-users
>>>
>>>     
>>
>>
>>
>>   
>


-- 
Dr. Douglas C. Schmidt                       Professor and Associate Chair
Electrical Engineering and Computer Science  TEL: (615) 343-8197
Vanderbilt University                        WEB: www.dre.vanderbilt.edu/~schmidt
Nashville, TN 37203                          NET: d.schmidt at vanderbilt.edu