Telling UIMA-AS which classloader to use

[Richard Eckart de Castilho <re...@apache.org>]

Hi,

I have a scenario here where we are dynamically constructing a classloader with access to a UIMA component and its dependencies and then would like to start a UIMA-AS service for that component. However, we didn't find any obvious way to pass a classloader into into the service context of the UimaAsynchronousEngine. 

It is possible to provide UIMA-AS with a classloader?

Best,

-- Richard

Re: Telling UIMA-AS which classloader to use

[Richard Eckart de Castilho <re...@apache.org>]

We were trying to write a Groovy program that uses the Groovy "grab" command
to dynamically acquire the Maven artifacts for a component and then to deploy
that component as a UIMA AS service. In our case, UIMA-AS was loaded using
the application classloader and then we loaded the components into separate
"child" classloaders.

We can probably find some solution or workaround for this - I was just wondering
if there was a way that I didn't find. If it causes us persisting problems, I'll
get back here.

Thanks!

-- Richard

> On 04.11.2016, at 17:50, Jaroslaw Cwiklik <ui...@gmail.com> wrote:
> 
> Richard, I am not aware of a way to "provide" a custom classloader with the
> current UIMA-AS code. Are you trying to isolate AE and its dependencies
> from the rest of UIMA-AS code for some reason? Can you elaborate a bit on
> what you need the UIMA-AS to do to support your scenario?
> 
> Jerry
> 
> On Fri, Nov 4, 2016 at 7:05 AM, Richard Eckart de Castilho <re...@apache.org>
> wrote:
> 
>> Hi,
>> 
>> I have a scenario here where we are dynamically constructing a classloader
>> with access to a UIMA component and its dependencies and then would like to
>> start a UIMA-AS service for that component. However, we didn't find any
>> obvious way to pass a classloader into into the service context of the
>> UimaAsynchronousEngine.
>> 
>> It is possible to provide UIMA-AS with a classloader?
>> 
>> Best,
>> 
>> -- Richard

Re: Telling UIMA-AS which classloader to use

[Jaroslaw Cwiklik <ui...@gmail.com>]

Richard, I am not aware of a way to "provide" a custom classloader with the
current UIMA-AS code. Are you trying to isolate AE and its dependencies
from the rest of UIMA-AS code for some reason? Can you elaborate a bit on
what you need the UIMA-AS to do to support your scenario?

Jerry

On Fri, Nov 4, 2016 at 7:05 AM, Richard Eckart de Castilho <re...@apache.org>
wrote:

> Hi,
>
> I have a scenario here where we are dynamically constructing a classloader
> with access to a UIMA component and its dependencies and then would like to
> start a UIMA-AS service for that component. However, we didn't find any
> obvious way to pass a classloader into into the service context of the
> UimaAsynchronousEngine.
>
> It is possible to provide UIMA-AS with a classloader?
>
> Best,
>
> -- Richard
>
>