OK, so in desparation, I went the whole hog and moved my SDK to "C: \appengine-java-sdk-1.3.2" and woooo, its suddenly compiled successfully....
So there you have it folks, anyone reading this and seemingly only ever finding someone saying "your classpath might be too long" may find it helpful to simply relocate your appengine sdk to the root of your c:\ drive and see if that helps! Also worth pointing out of course that this is technically an appengine issue rather than a GWT issue, so thanks to everyone on this GWT forum for helping me fix this, I will now go and add this solution to my question on the GAE for java forum! Thanks all, J PS I never did figure out how to run anything off the command line, but im not going to bother now, until I find a need to think about doing that later!! PPS a summary for anyone reading this later who doesnt want to read all the thread: To find out the classpath used: In Eclipse select Debug view by going to "Window|Open Perspective|Debug" and then select the debug window by going to "Window|Show View|Debug" then right click the last item in the list shown and select "properties" I found that my appengine SDK path was being references about 21 times as: C:\Program Files\eclipse\plugins \com.google.appengine.eclipse.sdkbundle. 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2 so I copied it to "C:\appengine-java-sdk-1.3.2" And then linked to it by doing the following: In Eclipse select the Java view by going to "Window|Open Perspective| Java" and then select the project properties by going to "Project| Properties" then select "Google|App Engine" and click on "Configure SDK's" then click "Add" on the right hand side and select the path you just created eg "C:\appengine-java-sdk-1.3.2" and add a "Display Name" eg "Short App Engine SDK". Click OK as needed to close all the windows, and everything should start working again!!! On Apr 6, 9:05 pm, John V Denley <johnvden...@googlemail.com> wrote: > Just as an FYI, using Kathrins suggestion > > (How to For Dummies: Select Debug view by going to "Window|Open > Perspective|Debug" and then select the debug window by going to > "Window|Show View|Debug" then right click the last item in the list > shown and select "properties") > > The result I was getting from there (which looks like a very long > list) is shown below (It seems pretty long because it includes a lot > of "C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib" references. I > have now changed this path and reimported it so that its now "C: > \Program Files\eclipse\plugins\com.google.appengine.eclipse.sdkbundle. > 1.3.2\appengine-java-sdk-1.3.2\" (which is 20 characters shorter) This > equates to at least 420 characters less in the whole classpath(!!) > which should suggest that its not the length of the classpath that is > the problem..... > > I will now try to figure out how to run the enhancer from the command > line, but if anyone has any other ideas in the mean time, please do > let me know! > > "C:\Program Files\Java\jre6\bin\javaw.exe" -Xmx512m "-javaagent:C: > \Program Files\eclipse\plugins\com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\agent\appengine- > agent.jar" -Dfile.encoding=Cp1252 -classpath "C:\Documents and Settings > \John\My Documents\_DeBa\ideba\iDeBanet\src;C:\Documents and Settings > \John\My Documents\_DeBa\ideba\iDeBanet\war\WEB-INF\classes;C:\Program > Files\eclipse\plugins\com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\shared > \appengine-local-runtime-shared.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\shared\geronimo- > el_1.0_spec-1.0.1.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\shared\geronimo- > jsp_2.1_spec-1.0.1.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\shared\geronimo- > servlet_2.5_spec-1.2.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\shared\jsp > \repackaged-appengine-ant-1.6.5.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\shared\jsp > \repackaged-appengine-ant-launcher-1.6.5.jar;C:\Program Files\eclipse > \plugins\com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\shared\jsp > \repackaged-appengine-commons-el-1.0.jar;C:\Program Files\eclipse > \plugins\com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\shared\jsp > \repackaged-appengine-commons-logging-1.1.1.jar;C:\Program Files > \eclipse\plugins\com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\shared\jsp > \repackaged-appengine-jasper-compiler-5.0.28.jar;C:\Program Files > \eclipse\plugins\com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\shared\jsp > \repackaged-appengine-jasper-runtime-5.0.28.jar;C:\Program Files > \eclipse\plugins\com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\user\appengine- > api-1.0-sdk-1.3.2.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\user\appengine- > api-labs-1.3.2.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\user\appengine- > jsr107cache-1.3.2.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\user > \jsr107cache-1.1.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\user\orm > \datanucleus-appengine-1.0.6.final.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\user\orm > \datanucleus-core-1.1.5.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\user\orm > \datanucleus-jpa-1.1.5.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\user\orm > \geronimo-jpa_3.0_spec-1.1.1.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\user\orm > \geronimo-jta_1.1_spec-1.1.1.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\user\orm\jdo2- > api-2.3-eb.jar;C:\Program Files\eclipse\plugins > \com.google.appengine.eclipse.sdkbundle. > 1.3.2_1.3.2.v201003241245\appengine-java-sdk-1.3.2\lib\appengine-tools- > api.jar;C:\Program Files\eclipse\plugins > \com.google.gwt.eclipse.sdkbundle. > 2.0.3_2.0.3.v201002191036\gwt-2.0.3\gwt-user.jar;C:\Program Files > \eclipse\plugins\com.google.gwt.eclipse.sdkbundle. > 2.0.3_2.0.3.v201002191036\gwt-2.0.3\gwt-dev.jar" > com.google.gwt.dev.DevMode -remoteUI 1707:344705537223585 -startupUrl > IDeBanet.html -logLevel INFO -port 8888 -war "C:\Documents and Settings > \John\My Documents\_DeBa\ideba\iDeBanet\war" -server > com.google.appengine.tools.development.gwt.AppEngineLauncher > com.ideba.net.IDeBanet > > On Apr 6, 8:07 pm, John V Denley <johnvden...@googlemail.com> wrote: > > > Thanks for all your hints and tips guys, I will have a go at trying to > > figure out what to do from everything you have written although at the > > moment it all sounds like double dutch to me (im not a "real" > > programmer- just someone who has managed to learn everything ive > > needed to do to get a web app up and running over the last 6-8 months, > > with great help from GWT/GAE, this community and lots and lots of > > google searches!!!) > > > Thanks again for the help so far. Its amazing how many times ive found > > people saying "maybe your classpath is too long" with absolutely no > > information about how to fix that, or even find out how long it is! > > LOL.... If I figure it out, ill try to write it up in "idiot" terms! > > J > > > On Apr 6, 7:40 pm, Isaac Truett <itru...@gmail.com> wrote: > > > > Thanks, Miguel! > > > > John, I'd suggest trying to run > > > com.google.appengine.tools.enhancer.Enhance > > > from the command line and see if you get the same error. See Enhancing > > > Data > > > Classes at the docs URL Miguel provided. And you should be able to get the > > > classpath that Eclipse constructs from your project's build path by > > > running > > > Development Mode and using the technique Kathrin provided. I'd start with > > > enhancing just one class file and see if it gets tripped up by the length > > > of > > > the classpath. > > > > 2010/4/6 Miguel Méndez <mmen...@google.com> > > > > > You are right. It won't show up there since we don't create a launch > > > > configuration for enhancement. Basically, we launch the enhancer as > > > > described in > > > >http://code.google.com/appengine/docs/java/datastore/usingjdo.html"Enhancing > > > > Data Classes" section. The problem could be the length of the > > > > classpath or the length of the classes that we pass to the enhancer. > > > > > 2010/4/6 Isaac Truett <itru...@gmail.com> > > > > > @Kathrin - That is a really useful feature. But I don't think the > > > > Enhancer > > > >> is going to show up in that list since it's run in the background by > > > >> the > > > >> plugin, rather than being launched by the user. > > > > >> @Miguel&Keith - Do either of you have greater insight into the > > > >> DataNucleus > > > >> Enhancer and what parameters it/GPE might use that javaw could choke > > > >> on? > > > > >> On Tue, Apr 6, 2010 at 11:55 AM, Katharina Probst > > > >> <kpro...@google.com>wrote: > > > > >>> In eclipse, if you go to the Debug view and right-click on the task > > > >>> (under debug, it might say "<terminated...>". If you go to > > > >>> Properties, > > > >>> it'll show the classpath that was actually run. > > > > >>> I'm not sure this helps, but it's happened to me before that I changed > > > >>> something that messed with the classpath in eclipse, and reverting > > > >>> that > > > >>> change didn't actually revert the classpath... > > > > >>> kathrin > > > > >>> On Tue, Apr 6, 2010 at 11:44 AM, Isaac Truett <itru...@gmail.com> > > > >>> wrote: > > > > >>>> I was thinking of libraries on the classpath rather than source > > > >>>> files. > > > >>>> But I don't even know for a fact that the DataNucleus Enhancer uses > > > >>>> the > > > >>>> project's buildpath. That's something the GPE folks would know. > > > > >>>> On Mon, Apr 5, 2010 at 4:28 PM, John V Denley < > > > >>>> johnvden...@googlemail.com> wrote: > > > > >>>>> Yes, Isaac, this is something I have seen elsewhere, but I use > > > >>>>> eclipse > > > >>>>> and I have no idea how to find out how long my classpath is...... > > > > >>>>> As far as I can tell all my java files are in : > > > >>>>> C:\Documents and Settings\John\My Documents\_DeBa\ideba\iDeBanet\src > > > >>>>> \com\ideba\net\client > > > >>>>> (I have 12 *.java files in here, recently increased to 13, which is > > > >>>>> when it started to fail, but I have rolled back to a previous > > > >>>>> version > > > >>>>> now) > > > >>>>> and > > > >>>>> C:\Documents and Settings\John\My Documents\_DeBa\ideba\iDeBanet\src > > > >>>>> \com\ideba\net\server > > > >>>>> (I have 14 *.java in here (this has not changed in months)) > > > > >>>>> Java build path is set to idebanet/src Included (All) and Excluded > > > >>>>> (none) Native library location (none) > > > > >>>>> If you can point me anywhere else to look or test, Ill do anything > > > >>>>> to > > > >>>>> sort this out > > > > >>>>> On Apr 5, 5:42 pm, Isaac Truett <itru...@gmail.com> wrote: > > > >>>>> > John, > > > > >>>>> > This may be completely out of left field, but has your classpath > > > >>>>> grown > > > >>>>> > recently? I've known java/javaw to fail due to > > ... > > read more » -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
