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From "Tong Fin" <tong....@gmail.com>
Subject Re: UIMA pear runtime
Date Wed, 02 May 2007 14:07:30 GMT
My thinking is that "pear runtime" is more closer to the " tooling" than the
"framework". It is hard to draw the boundary. Also, there are many runtimes
that UIMA can/may support.
I don't think that we should do something too specific to the "pear
runtime".

-- Tong

On 5/2/07, Michael Baessler <mba@michael-baessler.de> wrote:
>
> After doing most of the UIMA pear runtime work... I would like to
> suggest something else that came to my mind when implementing the pear
> runtime.
>
> Currently we work with a customResourceSpecifier. I would like to change
> that to a real pearSpecifier. There are two main reasons.
>     - Since the pear runtime is fully integrated to the UIMA core, I
> don't like that the descriptor has the source class that is used to load
> the pears in the specifier.
>        When using an own descriptor we can hide this unnecessary setting
> from the user.
>     - When we are now able to run pears in an aggregate flow, we may
> should also take care of the input and output capabilities for the pear
> main component descriptor. So
>        my suggestion is to create a pear descriptor that also can have
> input and output capabilities, so FlowController can handle pears as well.
>
> To make the whole pear stuff easier to use for the user, I would like to
> generate the pearSpecifier during the pear installation. We have all the
> necessary information when the pear is installed and can also set the
> input and output capabilities. So our users can use the generated pear
> descriptor to run the pear or to reference it in an aggregate descriptor.
>
> What do you think?
>
> -- Michael
>
>
>
> Michael Baessler wrote:
> > Currently it is not possible to run an installed pear file out of the
> > box in UIMA. I mean by just specifying the pear installation path or
> > something similar.
> > To run installed pear files there is a lot of user configuration and
> > implementation necessary. So it would be nice to have a UIMA pear
> > runtime that can run an installed pear file out of the box.
> >
> > With the suggestion of having custom resource specifiers
> > <customResourceSpecifier> we can provide an easy way to integrate such
> > a UIMA pear runtime.
> > We just have to implement a new PearAnalysisEngineWrapper that extends
> > the AnalysisEngineImplBase class that knows how to start an installed
> > pear file. All the necessary information is available and can be
> > parsed from the metadata of the installed pear. The utilities, e.g. to
> > dynamically load the classes (UIMA extension class loader) is also in
> > place and can be used. So an example of the <customResourceSpecifier>
> > can look like:
> >
> > <customResourceSpecifier
> > xmlns="http://uima.apache.org/resourceSpecifier">
> >
> > <resourceClassName>org.apache.PearAnalyisEngineWrapper
> </resourceClassName>
> >
> >    <parameters>
> >        <parameter name="installedPear"
> > value="/path/to/the/root/directory/of/the/installed/pear/file"/>
> >        <!-- and additional parameters if necessary -->
> >    </parameters>
> > </customResourceSpecifier>
> >
> > This solution will also work out of the box in our tooling. The tools
> > does not have to implement a PEAR runtime engine itself.
> >
> > Do we have any limitations when implementing this approach?
> >
> > Thoughts?
>
>

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