Andrea the ProcessFilter idea is a good one; can we make use of the existing
Hints technique?
Example:
interface ProcessFilter {
boolean filter(ProcessFactory factory, Name name);
}
// global default?
Hints hints = new Hints(Processors.PROCESS_FILTER, new CustomProcessFilter() );
GeoTools.addDefaultHints( hints );
Process process = Processors.createProcess( name ); // makes use of global
default hints
Inside Processors we can check the hints for a ProcessFilter and put on a
wrapper
that works on a name by name basis to restrict access.
Option: Allow Processors to be used as lookup (with a specific set of hints)
// From the rendering engine you would need a different process filter
Hints hints = new Hints(Processors.PROCESS_FILTER, new RenderingProcessFilter()
);
Processors lookup = new Processors( hints );
Process process = lookup.process( name ); // makes use of rendering process
filter
Option: Extend the static final methods to accept optional hints
// From the rendering engine you would need a different process filter
Hints hints = new Hints(Processors.PROCESS_FILTER, new RenderingProcessFilter()
);
Process process = Processors.createProcess( name, hints ); // makes use of
rendering process filter
Thoughts,
--
Jody Garnett
On Thursday, 10 November 2011 at 12:32 AM, Andrea Aime wrote:
> In particular I would like to disallow heavy processes to be used
> as rendering transformations or filter functions, at least give
> the administrator some control on what gets used where.
>
> A solution could be to have a pluggable process filter that can filter
> and wrap the factories:
>
> interface ProcessFilter {
> ProcessFactory filter(ProcessFactory factory);
> }
>
> If it returns null the factory is banned, otherwise it is free to wrap
> the factory so that certain processes in the factory are disallowed,
> or maybe wrapped so that they throw exception under particular
> conditions, such as too large inputs.
>
> Opinions?
>
> Cheers
> Andrea
>
>
> --
> -------------------------------------------------------
> Ing. Andrea Aime
> GeoSolutions S.A.S.
> Tech lead
>
> Via Poggio alle Viti 1187
> 55054 Massarosa (LU)
> Italy
>
> phone: +39 0584 962313
> fax: +39 0584 962313
>
> http://www.geo-solutions.it
> http://geo-solutions.blogspot.com/
> http://www.youtube.com/user/GeoSolutionsIT
> http://www.linkedin.com/in/andreaaime
> http://twitter.com/geowolf
>
> -------------------------------------------------------
>
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