[vtkusers] java memory

[Sebastien Jourdain]

I bet not,

but David Gobbi might be the best person to know if it's the case or not.

Seb

On Tue, Mar 29, 2011 at 9:16 AM, Lic. José M. Rodriguez Bacallao
<jmrbcu at gmail.com> wrote:
> those problems also apply to the python layer?
>
> On Tue, Mar 29, 2011 at 8:26 AM, Sebastien Jourdain
> <sebastien.jourdain at kitware.com> wrote:
>> Hi Jonathan,
>>
>> I directly reply on the context of your mail,
>>
>>
>> On Tue, Mar 29, 2011 at 2:33 AM, Jonathan Morra <jonmorra at gmail.com> wrote:
>>> Since I'm using vtkJavaGarbageCollector I'm already using
>>> vtkGlobalJavaHash.GC();.  The main questions that I currently still need
>>> answered are here
>>> 1.  should I have to call System.gc(); and System.runFinalization();
>>> frequently with VTK+Java?  It appears the memory is managed better when
>>> calling these lines every time vtkGlobalJavaHash.GC() is called, but I don't
>>> know if this is necessary.
>>
>> System.gc(); is the only one that you should really care about. But
>> Java does not offer any guarantee if this method will do something or
>> not.  Moreover, the GC will stop all the thread to do its job. So it
>> is basically up to you.
>>
>>> 2.  Is it ok to reuse Java variables?  Such as
>>> vtkImageData image = filter.GetOuput();
>>> // Do Stuff
>>> image = filter2.GetOuput();
>>
>> yes
>>
>>> 3.   Is it OK to move around java objects without an intermediate reference?
>>>  Such as
>>> image1.SetOutputSpacing(image2.GetSpacing());
>>
>> what do you mean by Java object ? for me as the Set/Get do have a
>> capital letter, I would say they come from the VTK world and if they
>> return a vtkObject, you should use an intermediate variable otherwise
>> if it's an array of primary type, that is just fine.
>>
>>> Sorry, forgot one more.  Should I be calling vtkGlobalJavaHash.GC() from the event dispatch thread?
>>> I saw that as an option in vtkJavaGarbageCollector, and I'm not sure why that's the case.
>>
>> This totally depend on your VTK code, if you insure that all the call
>> you are doing on the VTK layer is done through the EDT, then you
>> should, otherwise you shouldn't. (This is a requirement if the data is
>> shown in a renderer.)
>>
>> Seb
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>
>
>
> --
> Lic. José M. Rodriguez Bacallao
> Centro de Biofisica Medica
> -----------------------------------------------------------------
> Todos somos muy ignorantes, lo que ocurre es que no todos ignoramos lo mismo.
>
> Recuerda: El arca de Noe fue construida por aficionados, el titanic
> por profesionales
> -----------------------------------------------------------------
>