Re: [Geotools-gt2-users] Google's AppEngine complains about restricted classes (javax.imageio...)

[Jody G. <jod...@gm...>]

Interesting. Looks like spring is supported (http://www.springsource.org/node/2595). So if Java Factory SPI is really dead on google app engine it is going to be pretty annoying (that is how java itself wires in new image format support?). 

I was asking about a code sprint at foss4g; busting open a "lookup" interface for GeoTools would indeed be a great idea; I will go chase it up on the devel list.

Jody

On 26/08/2010, at 11:00 PM, Balint Persics wrote:

> Hi,
> 
> The equinox OSGi runtime can be bridged with GAE with some
> restrictions. See:
> http://eclipsesource.com/blogs/2009/04/10/osgi-on-appengine/
> and http://drop.io/appengine/
> 
> 
> On Thu, Aug 26, 2010 at 02:19, Jody Garnett <jod...@gm...> wrote:
>> Which is what I was talking with Justin about today :-)
>> 
>> (well actually we want to use Spring or OSGi a bit more smoothly; but a side effect would be an alternative to SPI). Fred do you know if Spring or OSGi works on google app engine?
>> 
>> Jody
>> 
>> 
>> On 26/08/2010, at 2:47 AM, Andrea Aime wrote:
>> 
>>> Fred Messinger (fredm) ha scritto:
>>>> Hi,
>>>> 
>>>> I'd like to incorporate reading shape files into a servlet running on
>>>> google's AppEngine.  Unfortunately, there are some classes in geotools
>>>> that are not on their white list.
>>>> http://code.google.com/appengine/docs/java/jrewhitelist.html
>>>> 
>>>> My code runs fine as a standalone java app, but when I run it as an
>>>> AppEngine web app, complains with the following:
>>>> 
>>>> java.lang.NoClassDefFoundError: javax.imageio.spi.ServiceRegistry is a
>>>> restricted class. Please see the Google  App Engine developer's guide
>>>> for more details.
>>>> 
>>>> I'm using the jars from geotools-2.6.5-bin.zip
>>>> 
>>>> Is there a way to build the jars without the javax.imageio... classes?
>>> 
>>> I fear it's not possible... spi is the one and only GeoTools plugin
>>> system, it's the backbone of the entire library, every pluggable class
>>> is looked up using it.
>>> 
>>> I guess that in order to avoid this issue we'd need... a pluggable
>>> plugin system ;-)
>>> 
>>> Cheers
>>> Andrea
>>> 
>>> 
>>> --
>>> Andrea Aime
>>> OpenGeo - http://opengeo.org
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> 
> 
> 
> -- 
> Persics Balint