OpenJPA works fine with GWT. Your issues have to do with the fact you're running on AppEngine. I don't even see how it's possible you got derby running on AppEngine unless you're using an all memory database.
On Mon, May 30, 2011 at 12:31 PM, roman <[email protected]> wrote: > 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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 » > > -- > You received this message because you are subscribed to the Google Groups > "Google Web Toolkit" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-web-toolkit?hl=en. > > -- You received this message because you are subscribed to 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