[
https://issues.apache.org/jira/browse/ISIS-322?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13574719#comment-13574719
]
Dan Haywood commented on ISIS-322:
----------------------------------
Additional info...
.... We figured out the issue with the key.
The Google Implementation EntityUtils (see below) search for the Pk information
on the MetaData.
public static Object idToInternalKey(ExecutionContext ec, Class<?> cls, Object
val, boolean allowSubclasses) {
AbstractClassMetaData cmd =
ec.getMetaDataManager().getMetaDataForClass(cls, ec.getClassLoaderResolver());
String kind = determineKind(cmd, ec);
AbstractMemberMetaData pkMemberMetaData =
cmd.getMetaDataForManagedMemberAtAbsolutePosition(cmd.getPKMemberPositions()[0]);
return idToInternalKey(kind, pkMemberMetaData, cls, val, ec,
allowSubclasses);
}
Because the ToDoItem class does not specify any @PrimaryKey annotation the
method throws null Pointer Exception because
cmd.getPKMemberPositions() is null.
To fix we simply added a primary key to the ToDoItem AuditEntry classes.
public class ToDoItem implements Comparable<ToDoItem> {
@PrimaryKey
@Persistent(valueStrategy =
javax.jdo.annotations.IdGeneratorStrategy.IDENTITY)
@Extension(vendorName="datanucleus", key="gae.encoded-pk", value="true")
private String key;
...
}
The explanation why we choose a String can be found here[1]
Because the class of the Key must match we updated the DataNucleusObjectStore
class:
390:result = getPersistenceManager().getObjectById(cls, jdoObjectId);
replaced with :
390:result = getPersistenceManager().getObjectById(cls, jdoObjectId.toString());
The application works fine on the development server, on the live
environment[2] we still have an issue with the wicket drop down list.
[ moved to new ISIS-329]
[1] Keys:
https://developers.google.com/appengine/docs/java/datastore/jdo/creatinggettinganddeletingdata#Keys
[2] Live: http://isis-gae.appspot.com/
> Allow JDO objectstore to run on the Google App Engine
> -----------------------------------------------------
>
> Key: ISIS-322
> URL: https://issues.apache.org/jira/browse/ISIS-322
> Project: Isis
> Issue Type: New Feature
> Components: Objectstore: JDO
> Affects Versions: objectstore-jdo-1.0.0
> Reporter: Dan Haywood
> Assignee: Dan Haywood
>
> Following info provided by Maurizio Taverna...
> We have (with some provisos) successfully deployed a version of the
> quickstart_wicket_restful_jdo on GAE.
> Below the information collected :
> 1. DataNucleusApplicationComponents.java
> 61:persistenceManagerFactory = JDOHelper.getPersistenceManagerFactory(props);
> replaced with :
> 61:persistenceManagerFactory =
> JDOHelper.getPersistenceManagerFactory("transactions-optional");
> See official Google documentation :
>
> https://developers.google.com/appengine/docs/java/datastore/jdo/overview-dn2#Getting_a_PersistenceManager_Instance
> 66:createSchema(props, classesToBePersisted);
> replace with :
> // 66:createSchema(props, classesToBePersisted);
> This feature is for RDBMS, it raise exception using DN Google implementation.
> 2. PersistenceSession.java
> 894:if (adapter.getVersion() == null) {
> 895: throw new ObjectPersistenceException("Object to be ... " + adapter);
> 896:}
> replaced with:
> 894://if (adapter.getVersion() == null) {
> 895:// throw new ObjectPersistenceException("Object to be ... " +
> adapter);
> 896://}
> We could not understand why the version is null, during the fixture
> installation ( removeAllToDosForCurrentUser ).
> 3. jdoconfig.xml
> The Google App Engine keep the Jdo configuration in
> /WEB-INF/classes/META-INF/jdoconfig.xml.
> We changed :
> <property name="datanucleus.appengine.autoCreateDatastoreTxns"
> value="false"/>
> This is a workaround, more information available here:
> https://developers.google.com/appengine/docs/java/datastore/jdo/overview-dn2#Disabling_Transactions_and_Porting_Existing_JDO_Apps
> With the changes above, the quickstart_wicket_restful_jdo is possible install
> the fixtures and list the items,
> but there are still errors accessing to an item.
> At
> https://docs.google.com/file/d/0B-Ekm92XLvTAcGxHNTJyRDA3bkk/edit?usp=sharing
> please find the zip of the project, including the ant build script , a live
> version is available here: http://isis-gae.appspot.com/.
> In order to run the example you need to install the GAE SDK and point the
> appengine.sdk property
> to the GAE SDK installation path.
> In addition please check in {gae.sdk}lib/tools/orm contains the datanucleos
> 3.1.1 jars. If not remove all the jar files (in default installation I found
> datanucleus 1.5 jars) and replace with jars available in
> {gae.sdk}/lib/opt/user/datanucleus/v2.
> Stack trace obtained when trying to access object:
> Unexpected RuntimeException
> Last cause: null
> WicketMessage: Can't instantiate page using constructor 'public
> org.apache.isis.viewer.wicket.ui.pages.entity.EntityPage(org.apache.wicket.request.mapper.parameter.PageParameters)'
> and argument 'objectOid=[TODO:L_1003], pageType=[ENTITY], pageTitle=[Write
> blog post]'. Might be it doesn't exist, may be it is not visible (public).
> Stacktrace
> Root cause:
> java.lang.NullPointerException
> at
> com.google.appengine.datanucleus.EntityUtils.idToInternalKey(EntityUtils.java:204)
> at
> com.google.appengine.datanucleus.DatastoreIdentityKeyTranslator.getKey(DatastoreIdentityKeyTranslator.java:32)
> at
> org.datanucleus.ObjectManagerImpl.newObjectId(ObjectManagerImpl.java:3439)
> at
> org.datanucleus.api.jdo.JDOPersistenceManager.newObjectIdInstance(JDOPersistenceManager.java:1618)
> at
> org.datanucleus.api.jdo.JDOPersistenceManager.getObjectById(JDOPersistenceManager.java:1740)
> at
> org.apache.isis.objectstore.jdo.datanucleus.DataNucleusObjectStore.loadPojo(DataNucleusObjectStore.java:380)
> at
> org.apache.isis.objectstore.jdo.datanucleus.persistence.adaptermanager.DataNucleusPojoRecreator.recreatePojo(DataNucleusPojoRecreator.java:38)
> at
> org.apache.isis.core.runtime.persistence.adaptermanager.AdapterManagerDefault.adapterFor(AdapterManagerDefault.java:300)
> at
> org.apache.isis.viewer.wicket.model.mementos.ObjectAdapterMemento$Type$2.recreateAdapter(ObjectAdapterMemento.java:104)
> at
> org.apache.isis.viewer.wicket.model.mementos.ObjectAdapterMemento$Type.getAdapter(ObjectAdapterMemento.java:170)
> at
> org.apache.isis.viewer.wicket.model.mementos.ObjectAdapterMemento.getObjectAdapter(ObjectAdapterMemento.java:288)
> at
> org.apache.isis.viewer.wicket.model.models.EntityModel.load(EntityModel.java:193)
> at
> org.apache.isis.viewer.wicket.model.models.EntityModel.load(EntityModel.java:202)
> at
> org.apache.isis.viewer.wicket.model.models.EntityModel.load(EntityModel.java:52)
> at
> org.apache.wicket.model.LoadableDetachableModel.getObject(LoadableDetachableModel.java:121)
> at
> org.apache.isis.viewer.wicket.ui.components.entity.EntityComponentFactoryAbstract.appliesTo(EntityComponentFactoryAbstract.java:55)
> at
> org.apache.isis.viewer.wicket.ui.ComponentFactoryAbstract.appliesTo(ComponentFactoryAbstract.java:61)
> at
> org.apache.isis.viewer.wicket.viewer.registries.components.ComponentFactoryRegistryDefault.findComponentFactories(ComponentFactoryRegistryDefault.java:136)
> at
> org.apache.isis.viewer.wicket.viewer.registries.components.ComponentFactoryRegistryDefault.findComponentFactory(ComponentFactoryRegistryDefault.java:153)
> at
> org.apache.isis.viewer.wicket.viewer.registries.components.ComponentFactoryRegistryDefault.findComponentFactoryElseFailFast(ComponentFactoryRegistryDefault.java:159)
> at
> org.apache.isis.viewer.wicket.viewer.registries.components.ComponentFactoryRegistryDefault.createComponent(ComponentFactoryRegistryDefault.java:119)
> at
> org.apache.isis.viewer.wicket.viewer.registries.components.ComponentFactoryRegistryDefault.addOrReplaceComponent(ComponentFactoryRegistryDefault.java:105)
> at
> org.apache.isis.viewer.wicket.ui.pages.PageAbstract.addComponent(PageAbstract.java:201)
> at
> org.apache.isis.viewer.wicket.ui.pages.PageAbstract.addChildComponents(PageAbstract.java:196)
> at
> org.apache.isis.viewer.wicket.ui.pages.entity.EntityPage.<init>(EntityPage.java:50)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:33)
> at
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:170)
> at
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:98)
> at
> org.apache.wicket.DefaultMapperContext.newPageInstance(DefaultMapperContext.java:137)
> at
> org.apache.wicket.core.request.handler.PageProvider.resolvePageInstance(PageProvider.java:278)
> at
> org.apache.wicket.core.request.handler.PageProvider.getPageInstance(PageProvider.java:166)
> at
> org.apache.wicket.request.handler.render.PageRenderer.getPage(PageRenderer.java:78)
> at
> org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:94)
> at
> org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:196)
> at
> org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:165)
> at
> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:830)
> at
> org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
> at
> org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:253)
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:210)
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:281)
> at
> org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188)
> at
> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:245)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
> at
> org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
> at
> org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
> at
> org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
> at
> org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
> at
> org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
> at
> org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
> at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
> at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at org.mortbay.jetty.Server.handle(Server.java:326)
> at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
> at
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> at
> com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:454)
> at
> com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:461)
> at com.google.tracing.TraceContext.runInContext(TraceContext.java:703)
> at
> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:338)
> at
> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:330)
> at
> com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:458)
> at java.lang.Thread.run(Thread.java:679)
> Complete stack:
> org.apache.wicket.WicketRuntimeException: Can't instantiate page using
> constructor 'public
> org.apache.isis.viewer.wicket.ui.pages.entity.EntityPage(org.apache.wicket.request.mapper.parameter.PageParameters)'
> and argument 'objectOid=[TODO:L_1003], pageType=[ENTITY], pageTitle=[Write
> blog post]'. Might be it doesn't exist, may be it is not visible (public).
> at
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:193)
> at
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:98)
> at
> org.apache.wicket.DefaultMapperContext.newPageInstance(DefaultMapperContext.java:137)
> at
> org.apache.wicket.core.request.handler.PageProvider.resolvePageInstance(PageProvider.java:278)
> at
> org.apache.wicket.core.request.handler.PageProvider.getPageInstance(PageProvider.java:166)
> at
> org.apache.wicket.request.handler.render.PageRenderer.getPage(PageRenderer.java:78)
> at
> org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:94)
> at
> org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:196)
> at
> org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:165)
> at
> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:830)
> at
> org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
> at
> org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:253)
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:210)
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:281)
> at
> org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188)
> java.lang.reflect.InvocationTargetException
> at
> com.google.appengine.runtime.Request.process-d3177901ba10f473(Request.java)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:33)
> at
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:170)
> at
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:98)
> at
> org.apache.wicket.DefaultMapperContext.newPageInstance(DefaultMapperContext.java:137)
> at
> org.apache.wicket.core.request.handler.PageProvider.resolvePageInstance(PageProvider.java:278)
> at
> org.apache.wicket.core.request.handler.PageProvider.getPageInstance(PageProvider.java:166)
> at
> org.apache.wicket.request.handler.render.PageRenderer.getPage(PageRenderer.java:78)
> at
> org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:94)
> at
> org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:196)
> at
> org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:165)
> at
> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:830)
> at
> org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
> at
> org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:253)
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:210)
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:281)
> at
> org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188)
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