Re: Invoking methods from multiple threads - connection policy

Toralf Lund wrote:
> Frank Rehberger wrote:
>   
>> Quoting "Toralf Lund" <[email protected]>:
>>
>>   
>>     
>>> Frank Rehberger wrote:
>>>     
>>>       
>>>> Toralf,
>>>>
>>>> if I remember correctly, there are at least these two options:
>>>> ORBIT_THREAD_HINT_PER_REQUEST
>>>> ORBIT_THREAD_HINT_PER_CONNECTION
>>>>
>>>> I would recommend the second one (per-connection), if it comes to   
>>>> near-real-time processing, to avoid priority inversion.
>>>>
>>>>       
>>>>         
>>> It seems to me that if I use this in conjunction with a  
>>> multi-threaded client, I essentially get single-threaded behaviour  
>>> for CORBA calls (there will only be one thread on the server-side)  
>>> if the CORBA object is shared between the threads on the client  
>>> side. That's if the client is implemented the ORBit2 way, i.e. all  
>>> operations on an object is sent across the same socket or whatever,  
>>> regardless of which thread they come from. This is why some other  
>>> ORBs will set up separate links for separate threads.
>>>     
>>>       
>> that is true, if the threads in your process have different  
>> priorities, using mutliple outbound connections (per thread) to same  
>> server would make a difference.
>>   
>>     
> I'm not quite sure what you mean here.
>
> The issue I'm facing is that to guarantee that there is one server-side 
> thread for each client-side thread, I need a separate connection in each 
> of the client-side threads, and with ORBit2 that also means one 
> CORBA_Object per thread, based on duplicate calls to 
> CORBA_ORB_string_to_object() or similar.
Actually, it's a bit harder than that, or perhaps impossible without 
modifying ORBit2 itself. Having duplicate object lookups doesn't really 
help, as the object is still shared "behind the scenes".

- Toralf


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