Toby,
thanks for taking the time to respond, I appreciate it.
First some things I should have said before, I am using the GAE
Eclipse plug in. GWT 1.7, App Engine 1.2.5.
What I don't understand is why other test applications seem to work
quite hapilly with datastore without me adding a load of jars to the
lib area. Those other applications are using GWT and for example the
standard eclipse generated GreatingServer expanded to use
PersistenceManager seem to work just fine.
Now this may just be down to good/bad luck and the way that the google
projects are structured and therefore work with Jetty etc.
If the correct way to structure things is to explicitly put the GAE/
JDO/... jars in the war/WEB-INF/lib area should they be appearing on
the classpath of the eclipse projects? And why do some projects/use
cases (such as via GWT RCP) seem to work and others fail?
Its coming up to midnight here, so I am going to sleep and revisit
this in the morning, hopefully with a clear head I will be able to
work out what I need to do, but any input on how to set up properly is
really appreciated.
J
On Sep 15, 11:23 pm, Toby Reyelts <to...@google.com> wrote:
> John,
> The JDO/JPA support for App Engine lives entirely in "userland". Like all
> the other libraries under the sdk's <SDK_ROOT>/lib/user folder, you must
> bundle it with your application in order to use it. One nice aspect about
> the ORM support living in userland is that you can easily apply patches or
> try new interim releases between official SDK releases.
>
> On Tue, Sep 15, 2009 at 6:17 PM, John <john.r.nic...@gmail.com> wrote:
>
> > Actually I think I have simplified this further. The basic issue seems
> > to be referencing anything to do with the datastore from an ordinary
> > servlet. So if I have a servlet
>
> > import java.io.IOException;
>
> > import javax.jdo.JDOHelper;
> > import javax.jdo.PersistenceManagerFactory;
> > import javax.servlet.ServletException;
> > import javax.servlet.http.HttpServlet;
> > import javax.servlet.http.HttpServletRequest;
> > import javax.servlet.http.HttpServletResponse;
>
> > public class UploadFileServlet extends HttpServlet {
> > �...@override
> > protected void service(HttpServletRequest request,
> > HttpServletResponse response) throws ServletException, IOException {
> > }
>
> > private static final PersistenceManagerFactory PMF =
>
> > JDOHelper.getPersistenceManagerFactory("transactions-optional");
>
> > }
>
> > and I send it a request I get the following exception
>
> > WARNING: Nested in javax.servlet.ServletException: init:
> > java.lang.NoClassDefFoundError: javax/jdo/JDOHelper
> > at
> > com.cloudscapesolutions.wavacalculator.server.UploadFileServlet.<clinit>
> > (UploadFileServlet.java:18)
> > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> > Method)
> > at sun.reflect.NativeConstructorAccessorImpl.newInstance
> > (NativeConstructorAccessorImpl.java:39)
> > at sun.reflect.DelegatingConstructorAccessorImpl.newInstance
> > (DelegatingConstructorAccessorImpl.java:27)
> > at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> > at java.lang.Class.newInstance0(Class.java:355)
> > at java.lang.Class.newInstance(Class.java:308)
> > at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
> > at org.mortbay.jetty.servlet.ServletHolder.getServlet
> > (ServletHolder.java:339)
> > at
> > org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
> > 463)
> > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
> > (ServletHandler.java:1093)
> > at
> > com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter
> > (TransactionCleanupFilter.java:43)
> > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
> > (ServletHandler.java:1084)
> > at com.google.appengine.tools.development.StaticFileFilter.doFilter
> > (StaticFileFilter.java:121)
> > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
> > (ServletHandler.java:1084)
> > at org.mortbay.jetty.servlet.ServletHandler.handle
> > (ServletHandler.java:360)
> > at org.mortbay.jetty.security.SecurityHandler.handle
> > (SecurityHandler.java:216)
> > at org.mortbay.jetty.servlet.SessionHandler.handle
> > (SessionHandler.java:181)
> > at org.mortbay.jetty.handler.ContextHandler.handle
> > (ContextHandler.java:712)
> > at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
> > 405)
> > at
> > com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle
> > (DevAppEngineWebAppContext.java:54)
> > at org.mortbay.jetty.handler.HandlerWrapper.handle
> > (HandlerWrapper.java:139)
> > at com.google.appengine.tools.development.JettyContainerService
> > $ApiProxyHandler.handle(JettyContainerService.java:313)
> > at org.mortbay.jetty.handler.HandlerWrapper.handle
> > (HandlerWrapper.java:139)
> > at org.mortbay.jetty.Server.handle(Server.java:313)
> > at
> > org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
> > 506)
> > at org.mortbay.jetty.HttpConnection$RequestHandler.content
> > (HttpConnection.java:844)
> > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644)
> > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
> > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
> > at org.mortbay.io.nio.SelectChannelEndPoint.run
> > (SelectChannelEndPoint.java:396)
> > at org.mortbay.thread.BoundedThreadPool$PoolThread.run
> > (BoundedThreadPool.java:442)
> > Caused by: java.lang.ClassNotFoundException: javax.jdo.JDOHelper
> > at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
> > at java.security.AccessController.doPrivileged(Native Method)
> > at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
> > at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
> > at
> > com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass
> > (IsolatedAppClassLoader.java:142)
> > at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
> > at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
> > ... 32 more
> > 15-Sep-2009 22:11:21 com.google.apphosting.utils.jetty.JettyLogger
> > warn
> > WARNING: /wavacalculator/fileupload
> > java.lang.NoClassDefFoundError: javax/jdo/JDOHelper
> > at
> > com.cloudscapesolutions.wavacalculator.server.UploadFileServlet.<clinit>
> > (UploadFileServlet.java:18)
> > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> > Method)
> > at sun.reflect.NativeConstructorAccessorImpl.newInstance
> > (NativeConstructorAccessorImpl.java:39)
> > at sun.reflect.DelegatingConstructorAccessorImpl.newInstance
> > (DelegatingConstructorAccessorImpl.java:27)
> > at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> > at java.lang.Class.newInstance0(Class.java:355)
> > at java.lang.Class.newInstance(Class.java:308)
> > at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
> > at org.mortbay.jetty.servlet.ServletHolder.getServlet
> > (ServletHolder.java:339)
> > at
> > org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
> > 463)
> > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
> > (ServletHandler.java:1093)
> > at
> > com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter
> > (TransactionCleanupFilter.java:43)
> > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
> > (ServletHandler.java:1084)
> > at com.google.appengine.tools.development.StaticFileFilter.doFilter
> > (StaticFileFilter.java:121)
> > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
> > (ServletHandler.java:1084)
> > at org.mortbay.jetty.servlet.ServletHandler.handle
> > (ServletHandler.java:360)
> > at org.mortbay.jetty.security.SecurityHandler.handle
> > (SecurityHandler.java:216)
> > at org.mortbay.jetty.servlet.SessionHandler.handle
> > (SessionHandler.java:181)
> > at org.mortbay.jetty.handler.ContextHandler.handle
> > (ContextHandler.java:712)
> > at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
> > 405)
> > at
> > com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle
> > (DevAppEngineWebAppContext.java:54)
> > at org.mortbay.jetty.handler.HandlerWrapper.handle
> > (HandlerWrapper.java:139)
> > at com.google.appengine.tools.development.JettyContainerService
> > $ApiProxyHandler.handle(JettyContainerService.java:313)
> > at org.mortbay.jetty.handler.HandlerWrapper.handle
> > (HandlerWrapper.java:139)
> > at org.mortbay.jetty.Server.handle(Server.java:313)
> > at
> > org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
> > 506)
> > at org.mortbay.jetty.HttpConnection$RequestHandler.content
> > (HttpConnection.java:844)
> > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644)
> > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
> > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
> > at org.mortbay.io.nio.SelectChannelEndPoint.run
> > (SelectChannelEndPoint.java:396)
> > at org.mortbay.thread.BoundedThreadPool$PoolThread.run
> > (BoundedThreadPool.java:442)
> > Caused by: java.lang.ClassNotFoundException: javax.jdo.JDOHelper
> > at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
> > at java.security.AccessController.doPrivileged(Native Method)
> > at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
> > at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
> > at
> > com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass
> > (IsolatedAppClassLoader.java:142)
> > at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
> > at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
> > ... 32 more
>
> > I am sure I must have missed some discussion on how to set up servlets
> > to get them working in GAE. Help appreciated, been banging my head
> > against this all day!!
>
> > Cheers, J
>
> > On Sep 15, 10:58 pm, John <john.r.nic...@gmail.com> wrote:
> > > In an attempt to load data into a fledgling GAE Java application I am
> > > using XStream (xstream-gae.jar a patched version that others have
> > > developed to get a working version with GAE) coupled with a
> > > FileUploadServlet that upload an XML file description of some initial
> > > application to prime the application datastore.
>
> > > The problem I am encountering is that the Objects being created from
> > > XStream have been annotated with persistence annotations
> > > (@PersistenceCapable(identityType=IdentityType.APPLICATION) ...) to
> > > make them usable with the data store.
>
> > > When the servlet is executed to process the uploaded file stream I get
> > > a ClassCastExceptions for some of the app engines persistence related
> > > files, e.g
>
> > > WARNING: Error for /wavacalculator/fileupload
>
> ...
>
> read more »
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