I have a simple 3 class example:
@PersistenceCapable
public class MyUser {
@Persistent
@Embedded
private ContactDetails contactInfo;
...
}
@PersistenceCapable
@EmbeddedOnly
public class ContactDetails {
@Persistent
@Embedded
private MyPostalAddress address
...
}
@PersistenceCapable
@EmbeddedOnly
public class MyPostalAddress {
@Persistent
private String postalAddress;
...
}
My main class
{
...
MyPostalAddress addr = new MyPostalAddress();
addr.setPostalAddress("123 Main St.");
ContactDetails cd = new ContactDetails();
cd.setAddress(addr);
MyUser user = new MyUser();
user.setContactInfo(cd).
pm.makePersistent(newUser);
tx.commit();
}
>>>>>>>>>>>>>>>>>>>
Once the makePersistent() call is invoked I receive the following
stacktrace. If I don't have a nested embedded class and simply move
the MyPostalAddress out of ContactDetails and instead embed it into
MyUser everything works. So I have 2 questions:
(1) The DataNucleus documentation (http://www.datanucleus.org/products/
accessplatform/jdo/orm/embedded.html#NestedPC) explicitly says the
nested embedded classes work with JDO but GAE documentation (http://
code.google.com/appengine/docs/java/datastore/
dataclasses.html#Embedded_Classes) doesn't mention that it does or
doesn't. GAE only has a single example of an Embedded Class and that
is an inner class on top. I have tried different paths but they all
point to GAE not supporting nested (more than 1 level deep) Embedded
Classes. Can anyone confirm or refute my conclusion?
(2) Furthermore, in my nested embedded class I also tried to have a
property that was a full entity onto itself (requires its own space)
and that was rejected. I actually tried this model first and once
that didn't work I tried the simple example I gave above. My
stacktrace was different for this. It was along the lines of index: 5
is out of bounds type message. I didn't reproduce this since I
modified my code but it's all the same. So if somehow (show me please)
nested embedded classes work do they support non-simple properties
that are actually fully persistable entities themselves?
Thanks in advance.
STACKTRACE>>>>>>>>>>>>>>>>>>>>>>>
HTTP ERROR 500
Problem accessing /register.action. Reason:
Specified class class java.lang.String is not persistable
Caused by:
javax.jdo.JDOFatalUserException: Specified class class
java.lang.String is not persistable
at
org.datanucleus.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:
354)
at
org.datanucleus.jdo.JDOPersistenceManager.jdoMakePersistent(JDOPersistenceManager.java:
674)
at
org.datanucleus.jdo.JDOPersistenceManager.makePersistent(JDOPersistenceManager.java:
694)
at
com.camelspeed.core.service.authentication.DefaultUserRegistrationServiceImpl.register(DefaultUserRegistrationServiceImpl.java:
56)
at
com.camelspeed.web.action.RegisterActionBean.register(RegisterActionBean.java:
48)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:
100)
at net.sourceforge.stripes.controller.DispatcherHelper
$6.intercept(DispatcherHelper.java:467)
at
net.sourceforge.stripes.controller.ExecutionContext.proceed(ExecutionContext.java:
158)
at
net.sourceforge.stripes.controller.BeforeAfterMethodInterceptor.intercept(BeforeAfterMethodInterceptor.java:
113)
at
net.sourceforge.stripes.controller.ExecutionContext.proceed(ExecutionContext.java:
155)
at
net.sourceforge.stripes.controller.ExecutionContext.wrap(ExecutionContext.java:
74)
at
net.sourceforge.stripes.controller.DispatcherHelper.invokeEventHandler(DispatcherHelper.java:
465)
at
net.sourceforge.stripes.controller.DispatcherServlet.invokeEventHandler(DispatcherServlet.java:
278)
at
net.sourceforge.stripes.controller.DispatcherServlet.service(DispatcherServlet.java:
160)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
511)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1166)
at
net.sourceforge.stripes.controller.StripesFilter.doFilter(StripesFilter.java:
247)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at org.springframework.security.web.FilterChainProxy
$VirtualFilterChain.doFilter(FilterChainProxy.java:343)
at
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:
109)
at
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:
83)
at org.springframework.security.web.FilterChainProxy
$VirtualFilterChain.doFilter(FilterChainProxy.java:355)
at
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:
97)
at org.springframework.security.web.FilterChainProxy
$VirtualFilterChain.doFilter(FilterChainProxy.java:355)
at
org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:
100)
at org.springframework.security.web.FilterChainProxy
$VirtualFilterChain.doFilter(FilterChainProxy.java:355)
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