Re: [Geotools-gt2-users] GeoTools 34.0 released for Java 17 with Eclipse ImageN processing engine

[Kalesse S. <Soe...@dw...>]

Hi Andrea, 

That's exactly my point. I  do assume that it was not intended for these two to coexist, but it should just work fine because there are two different registries and the operations interfaces are different, so in theory these two do not collide at all. That gives all users a good "workaround" to live with until applications and libraries have succeeded to migrate. 

And that's also exactly where my PR comes in. The three mentioned ImageN libraries (and only those three!) contain ServiceLoader definitions that are wrong. The register the ImageN operations at the JAI registry. That leads to class cast exceptions (wrong interfaces). That's the point that must definitely be fixed whatsoever.

Now that fixed, here arises the second aspect: Right now you cannot mix standard ImageN and ServiceLoader registration. ImageN does not support that. It will fail to initialize if one operation had already been registered by that other means. So you must decide: either support multiple ways of registration in the ImageN core or decide upon one and let it go. 

Therefore my PR removes the three ServiceLoader definitions: 1) because they were wrong and 2) because that is the least invasive fix to make ImageN initialize correctly. The PR#119 was tested locally running GeoServer 2.2.8.0 and another application that uses JAI and it worked just fine.

I hope you can agree that this is a proper fix and should be part in one of the next releases. For us it is a show-stopper for upgrading to GT 33.x / GS 2.28.x. 

Thanks!
Sören

-----Ursprüngliche Nachricht-----
Von: Andrea Aime <and...@ge...> 
Gesendet: Freitag, 31. Oktober 2025 15:25
An: Kalesse Sören <ska...@ex...>
Cc: GeoTools Users <geo...@li...>
Betreff: Re: [Geotools-gt2-users] GeoTools 34.0 released for Java 17 with Eclipse ImageN processing engine

Hi,
I second what Jody said, there was no plan to make the coexist, it's an upgrade path.
However... I believe that a coexistence could be possible, the java packages
are different, so by having ImageN use a different file name for the registry files in META-INF, 
from registryFile.jai to registryFile.imagen, a coexistence might be possible, even if likely
wasteful (two separate image processing caches in memory are not the greatest of ideas).

A coexistence is just not in our plans, but since ImageN is not yet available as 1.0, if DWD wants
to put the development effort to get it done, I would not be against it.
I see this applicable to the GeoServer 3.0 series.

I would recommend switching existing software to ImageN though, we prepared migration scripts
that should help in the endeavor.

Regards,

Andrea Aime




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On Thu, Oct 30, 2025 at 5:29 PM Kalesse Sören <Soe...@dw... <mailto:Soe...@dw...> > wrote:


	Hi,
	
	thanks for the new release! We have noticed a problem though, that deals with environments where GeoTools (and now ImageN) and JAI are used at the same time. I have documented the issue at https://github.com/eclipse-imagen/imagen/issues/118 <https://ofcsg2dvf1.dwd.de/fmlurlsvc/?fewReq=:B:JVs5MjYyOSV1PjEtMyVqZz4zMjkzMiVwamRtYnd2cWY+NDE1YDExNTs1ZjpnNTEwZzIyZmU7NmE7O2ZmZWFgYjJnMzA0NmY1NSV3PjI0NTI6MTM0OzolcmpnPjY6VUZSV3FGMzEyMTswLjY6VUZSV3FFMzEyMTswJXFgc3c+UGxmcWZtLUhib2ZwcGZDZ3RnLWdmJWA+NjEla2dvPjM=&url=https%3a%2f%2fgithub.com%2feclipse-imagen%2fimagen%2fissues%2f118>  and there is a PR attached https://github.com/eclipse-imagen/imagen/pull/119 <https://ofcsg2dvf1.dwd.de/fmlurlsvc/?fewReq=:B:JVs5MjYyOSV1PjEtMyVqZz4zMjkzMiVwamRtYnd2cWY+ZmVgNDplZTRlYWY0NWUzZ2BlMjA3M2UzZTU1MGdmNjQ6Zzc1MGdnNyV3PjI0NTI6MTM0OzolcmpnPjY6VUZSV3FGMzEyMTswLjY6VUZSV3FFMzEyMTswJXFgc3c+UGxmcWZtLUhib2ZwcGZDZ3RnLWdmJWA+NjEla2dvPjM=&url=https%3a%2f%2fgithub.com%2feclipse-imagen%2fimagen%2fpull%2f119> . 
	
	I wonder if there's any chance the problem can be solved soon as it currently prevents us from upgrading to GeoServer 2.28.x. 
	
	Thanks and Best Regards
	Sören 
	
	-----Ursprüngliche Nachricht-----
	Von: Jody Garnett <jod...@gm... <mailto:jod...@gm...> > 
	Gesendet: Mittwoch, 22. Oktober 2025 20:57
	An: GeoTools Users <geo...@li... <mailto:geo...@li...> >
	Betreff: [Geotools-gt2-users] GeoTools 34.0 released for Java 17 with Eclipse ImageN processing engine
	
	The GeoTools team is pleased to announce the release <https://ofcsg2dvf1.dwd.de/fmlurlsvc/?fewReq=:B:JVE3PDg8Nyt7MD8jPStkaTA9PDc9PCt+ZGpjbHl4f2gwazk7bj5uNG8+Oj5saW5ub2s4NT5raW5paWg+bGw+bjs0OT41azw9PCt5MDw6Ozw8ODQ1OjsrfGRpMDg0QEc5bGFpPT85NDs4IDg0QEc5bGFoPT85NDs4K39ufXkwXmJof2hjI0ZsYWh+fmhNaXppI2loK24wNT0rZWlhMD0=&url=https%3a%2f%2fgeotoolsnews.blogspot.com%2f2025%2f10%2fgeotools-340-release.html>  of the latest stable version of GeoTools 34.0 <https://ofcsg2dvf1.dwd.de/fmlurlsvc/?fewReq=:B:JVE3PDg8Nyt7MD8jPStkaTA9PDc9PCt+ZGpjbHl4f2gwbDU1azU5OWhpaT9sbG5rPTRuPmw9ND9rOWg7NGhuPDU9Oz88aWtsOit5MDw6Ozw8ODQ1OjsrfGRpMDg0QEc5bGFpPT85NDs4IDg0QEc5bGFoPT85NDs4K39ufXkwXmJof2hjI0ZsYWh+fmhNaXppI2loK24wOD8rZWlhMD0=&url=https%3a%2f%2fsourceforge.net%2fprojects%2fgeotools%2ffiles%2fGeoTools%252034%2520Releases%2f34.0%2f> . This release is available from the repo.osgeo.org <https://ofcsg2dvf1.dwd.de/fmlurlsvc/?fewReq=:B:JVs5MjYyOSV1PjEtMyVqZz4zMjkzMiVwamRtYnd2cWY+YGFhNzE3MmAxNDM1YmJlNjNhOzpiYTpiYjc6NGU6N2BiNTRiOjQyZiV3PjI0NTI6MTM0OzolcmpnPjY6VUZSV3FGMzEyMTswLjY6VUZSV3FFMzEyMTswJXFgc3c+UGxmcWZtLUhib2ZwcGZDZ3RnLWdmJWA+NjEla2dvPjM=&url=http%3a%2f%2frepo.osgeo.org>  <https://ofcsg2dvf1.dwd.de/fmlurlsvc/?fewReq=:B:JVE3PDg8Nyt7MD8jPStkaTA9PDc9PCt+ZGpjbHl4f2gwbGw0Pms+O2g7NDs/aD84NT47PjloPj48O2g6PGw7OGxpbDg+aG44byt5MDw6Ozw8ODQ1OjsrfGRpMDg0QEc5bGFpPT85NDs4IDg0QEc5bGFoPT85NDs4K39ufXkwXmJof2hjI0ZsYWh+fmhNaXppI2loK24wOD8rZWlhMD0=&url=http%3a%2f%2frepo.osgeo.org>  and is made in conjunction with ImageN 0.9.0, ImageIO-Ext 2.0.0, GeoWebCache 1.28.0, and GeoServer 2.28.0.
	
	This is a major update:
	
	*       The library now requires Java 17, ending support for Java 11
	
	*       Upgrade from Java Advanced Imaging Library 1.1.3 to Eclipse ImageN 0.9.0.
	
	*       Library now provides a maven bill-of-materials import for both library modules and third-party-dependences making it considerably easier for downstream projects to synchronize dependences when upgrading GeoTools
	
	*       For more information please see upgrade instructions <https://ofcsg2dvf1.dwd.de/fmlurlsvc/?fewReq=:B:JVE3PDg8Nyt7MD8jPStkaTA9PDc9PCt+ZGpjbHl4f2gwNDk1bjo7P2s0bms0OTk9aTo+a287a2k8PzlvbjhuaTw9PjtoPj81NSt5MDw6Ozw8ODQ1OjsrfGRpMDg0QEc5bGFpPT85NDs4IDg0QEc5bGFoPT85NDs4K39ufXkwXmJof2hjI0ZsYWh+fmhNaXppI2loK24wOD8rZWlhMD0=&url=https%3a%2f%2fdocs.geotools.org%2fstable%2fuserguide%2fwelcome%2fupgrade.html>  in the user manual
	
	Thanks to Jody Garnett (GeoCat) for making this release, Gabriel Roldan (Camptocamp) for all the build improvements, and Andrea Aime (GeoServer) for working so hard on the Eclipse ImageN migration.
	
	These major library updates were undertaken as part of the GeoServer 3 activities, and we would like to the crowdfunding sponsors their financial support.
	
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