Monday, May 30, 2011

Re: GWT and OpenJPA not working together

allright. your push made me look into it a little deeper :-)
My solution to the "NoClassDefFoundError: java.io.FileOutputStream is
a restricted class" is disabling the usage of Google's App engine
under Project - Properties | Google | App Engine | Use Google App
Engine --> uncheck

After that i got "ClassCastException:
org.datanucleus.store.rdbms.RDBMSManager cannot be cast to
org.datanucleus.store.appengine.DatastoreManager" which made me
banning the datanucleus-appengine-1.0.8.final.jar from the projects
classpath as well.
I have no clue if this is a good idea, but my code is running so far
and I am able to make calls to the Derby database.

Which brings me back to my other question:
Is it utterly impossible to have the persistence layer running with
OpenJPA along with a GWT frontend? As I fear Apache James is dependent
on its familiar JPA technology.

again, thanks for your advice. you helped me loads
alltogether I spent already a week on these issues, and I'm craving
for answers
cheers

On 30 Mai, 14:48, Patrick Julien <pjul...@gmail.com> wrote:
> I think that's specific enough:
>
> "Caused by: java.lang.NoClassDefFoundError: java.io.FileOutputStream
> is a restricted class. Please see the Google  App Engine developer's
> guide for more details."
>
>
>
>
>
>
>
> On Mon, May 30, 2011 at 4:29 AM, roman <roman.za...@gmail.com> wrote:
> > Thank you for your quick response.
> > I followed your advise and changed the underlying technology of my JPA
> > layer to DataNucleus.
>
> > But i ran into a different problem
>
> > log4j:WARN No appenders could be found for logger
> > (DataNucleus.Connection).
> > log4j:WARN Please initialize the log4j system properly.
> > [ERROR] javax.servlet.ServletContext log: unavailable
> > javax.persistence.PersistenceException: Provider error. Provider:
> > org.datanucleus.store.appengine.jpa.DatastorePersistenceProvider
> >        at javax.persistence.Persistence.createFactory(Persistence.java:176)
> >        ...
> >        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> >        at
> > org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
> > 409)
> >        at org.mortbay.thread.QueuedThreadPool
> > $PoolThread.run(QueuedThreadPool.java:582)
> > Caused by: javax.jdo.JDOFatalInternalException: Unexpected exception
> > caught.
> > NestedThrowables:
> > java.lang.reflect.InvocationTargetException
> >        at
> > javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:
> > 1186)
> >        at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:
> > 803)
> >        at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:
> > 698)
> >        ...
> > Caused by: java.lang.NoClassDefFoundError: java.io.FileOutputStream is
> > a restricted class. Please see the Google  App Engine developer's
> > guide for more details.
> >        at
> > com.google.appengine.tools.development.agent.runtime.Runtime.reject(Runtime.java:
> > 51)
> >        at
> > org.apache.derby.impl.services.stream.SingleStream.PBmakeFileHPW(Unknown
> > Source)
> >        at org.apache.derby.impl.services.stream.SingleStream.run(Unknown
> > Source)
>
> > Well I see that i probably have got an error in the configuration of
> > the DataStorePersistenceProvider. Unfortunately, I am not sure what
> > the error could be. Is there any way to get a more specific
> > description of what is causing the problem?
>
> > cheers, roman
>
> > On 27 Mai, 15:28, Patrick Julien <pjul...@gmail.com> wrote:
> >> If you wan't to use JPA with AppEngine, you have to use the JPA that
> >> comes with AppEngine which is based on datanucleus.  See
>
> >>http://code.google.com/appengine/docs/java/datastore/jpa/overview.html
>
> >> for an overview
>
> >> On Fri, May 27, 2011 at 5:56 AM, roman <roman.za...@gmail.com> wrote:
> >> > Hi,
> >> > I'm trying to implement a UserManagement based on GoogleWebToolkit
> >> > (Adding, deleting, assigning privileged; nothing special there). The
> >> >GWT-module is using a serparate persistence module, which I included
> >> > as a jar-file and which is based onOpenJPA.
>
> >> > The persistence layer is working fine as long is I run it standalone.
> >> > But when I wire it to myGWTproject, I can't create the
> >> > EntityManagerFactory any more. I get a NullPointerException in one of
> >> > theOpenJPAclasses, which I think is because that Google App Engine
> >> > replaced the default java.lang.ClassLoader.
>
> >> > Is it a bad idea to useOpenJPAwithGWT? Is there anything to
> >> > consider when combining these libraries?
>
> >> > For better understanding find the source code attached.
> >> > Any help would be greatly appreciated.
> >> > thx, roman
>
> >> > The server is running athttp://localhost:8888/
> >> > [WARN] Error for /usermgmtui/userInformation
> >> > java.lang.ExceptionInInitializerError
> >> >        at org.apache.openjpa.kernel.Bootstrap.invokeFactory(Bootstrap.java:
> >> > 116)
> >> >        at
> >> > org.apache.openjpa.kernel.Bootstrap.getBrokerFactory(Bootstrap.java:
> >> > 96)
> >> >        at
> >> > org.apache.openjpa.persistence.OpenJPAPersistence.getEntityManagerFactory(OpenJPAPersistence.java:
> >> > 92)
> >> >        at
> >> > com.mycompany.commons.jpa.JpaUserManagement.<init>(JpaUserManagement.java:
> >> > 64)
> >> >        at
> >> > com.mycompany.commons.UserManagementImpl.setDatasoure(UserManagementImpl.java:
> >> > 71)
> >> >        at
> >> > com.mycompany.ui.server.UserInformationServiceImpl.<init>(UserInformationServiceImpl.java:
> >> > 36)
> >> >        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> >> > Method)
> >> >        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown
> >> > Source)
> >> >        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown
> >> > Source)
> >> >        at java.lang.reflect.Constructor.newInstance(Unknown Source)
> >> >        at java.lang.Class.newInstance0(Unknown Source)
> >> >        at java.lang.Class.newInstance(Unknown Source)
> >> >        at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
> >> >        at
> >> > org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:
> >> > 428)
> >> >        at
> >> > org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:
> >> > 339)
> >> >        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
> >> > 487)
> >> >        at org.mortbay.jetty.servlet.ServletHandler
> >> > $CachedChain.doFilter(ServletHandler.java:1166)
> >> >        at
> >> > com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:
> >> > 35)
> >> >        at org.mortbay.jetty.servlet.ServletHandler
> >> > $CachedChain.doFilter(ServletHandler.java:1157)
> >> >        at
> >> > com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
> >> > 58)
> >> >        at org.mortbay.jetty.servlet.ServletHandler
> >> > $CachedChain.doFilter(ServletHandler.java:1157)
> >> >        at
> >> > com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
> >> > 43)
> >> >        at org.mortbay.jetty.servlet.ServletHandler
> >> > $CachedChain.doFilter(ServletHandler.java:1157)
> >> >        at
> >> > com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
> >> > 122)
> >> >        at org.mortbay.jetty.servlet.ServletHandler
> >> > $CachedChain.doFilter(ServletHandler.java:1157)
> >> >        at
> >> > com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:
> >> > 94)
> >> >        at org.mortbay.jetty.servlet.ServletHandler
> >> > $CachedChain.doFilter(ServletHandler.java:1157)
> >> >        at
> >> > org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
> >> > 388)
> >> >        at
> >> > org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
> >> > 216)
> >> >        at
> >> > org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
> >> > 182)
> >> >        at
> >> > org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
> >> > 765)
> >> >        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
> >> > 418)
> >> >        at
> >> > com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
> >> > 70)
> >> >        at
> >> > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
> >> > 152)
> >> >        at com.google.appengine.tools.development.JettyContainerService
> >> > $ApiProxyHandler.handle(JettyContainerService.java:351)
> >> >        at
> >> > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
> >> > 152)
> >> >        at org.mortbay.jetty.Server.handle(Server.java:326)
> >> >        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
> >> > 542)
> >> >        at org.mortbay.jetty.HttpConnection
> >> > $RequestHandler.content(HttpConnection.java:938)
> >> >        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
> >> >        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
> >> >        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> >> >        at
> >> > org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
> >> > 409)
> >> >        at org.mortbay.thread.QueuedThreadPool
> >> > $PoolThread.run(QueuedThreadPool.java:582)
> >> > Caused by: java.lang.reflect.UndeclaredThrowableException
> >> >        at $Proxy29.recordAppClassLoader(Unknown Source)
> >> >        at
> >> > com.google.appengine.tools.development.agent.runtime.Runtime.recordClassLoader(Runtime.java:
> >> > 47)
> >> >        at
> >> > org.apache.openjpa.lib.util.MultiClassLoader.<init>(MultiClassLoader.java:
> >> > 60)
> >> >        at org.apache.openjpa.lib.util.J2DoPrivHelper
> >> > $47.run(J2DoPrivHelper.java:1011)
> >> >        at org.apache.openjpa.lib.util.J2DoPrivHelper
> >> > $47.run(J2DoPrivHelper.java:1009)
> >> >        at java.security.AccessController.doPrivileged(Native Method)
> >> >        at
> >> > org.apache.openjpa.lib.conf.ProductDerivations.<clinit>(ProductDerivations.java:
> >> > 59)
> >> >        ... 44 more
> >> > Caused by: java.lang.reflect.InvocationTargetException
> >> >        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >> >        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> >> >        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> >> >        at java.lang.reflect.Method.invoke(Unknown Source)
> >> >        at com.google.apphosting.utils.clearcast.ClearCast$CasterImpl
> >> > $ProxyHandler.invoke(ClearCast.java:411)
> >> >        ... 51 more
> >> > Caused by: java.lang.NullPointerException
> >> >        at
> >> > org.apache.openjpa.lib.util.MultiClassLoader.hashCode(MultiClassLoader.java:
> >> > 277)
> >> >        at java.util.WeakHashMap.put(Unknown Source)
> >> >        at
> >> > com.google.appengine.tools.development.agent.impl.AgentImpl.recordAppClassLoader(AgentImpl.java:
> >> > 34)
> >> >        ... 56 more
> >> > [WARN]
>
> ...
>
> Erfahren Sie mehr »

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