Forgive me if this has been answered already...I looked around and
found only this one unanswered post:
http://groups.google.com/group/google-appengine-java/browse_thread/thread/636e7cb54d7ca505
It seems that if I create a proxy object and put it into the session,
then I run into deserialization troubles when the server tries to
restore the session on the next request.
To break this down to the simplest thing possible, I created an
interface called Foo:
public interface Foo {
void doFoo();
}
And an equally simple implementation:
public class FooImpl implements Foo, Serializable {
public void doFoo() {
System.out.println("Foo is good");
}
}
I then created a proxy object for it and put the proxy into the
session and redirected to another page. At that point, I get the
following:
javax.servlet.ServletException: java.lang.RuntimeException:
java.lang.ClassNotFoundException:
org.springframework.social.connect.web.Foo
at
com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:
251)
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
$RequestHandler.headerComplete(HttpConnection.java:923)
at
com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:
76)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:
135)
at
com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:
260)
at com.google.apphosting.base.RuntimePb$EvaluationRuntime
$2.handleRequest(RuntimePb.java:9673)
at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:
422)
at com.google.net.rpc.impl.Server$RpcTask.runInContext(Server.java:
573)
at com.google.tracing.TraceContext$TraceContextRunnable
$1.run(TraceContext.java:448)
at com.google.tracing.TraceContext.runInContext(TraceContext.java:
688)
at com.google.tracing.TraceContext
$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:
326)
at com.google.tracing.TraceContext
$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:
318)
at com.google.tracing.TraceContext
$TraceContextRunnable.run(TraceContext.java:446)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:
1110)
at java.util.concurrent.ThreadPoolExecutor
$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)
Caused by: java.lang.RuntimeException:
java.lang.ClassNotFoundException:
org.springframework.social.connect.web.Foo
at
com.google.apphosting.runtime.jetty.SessionManager.deserialize(SessionManager.java:
386)
at
com.google.apphosting.runtime.jetty.MemcacheSessionStore.getSession(MemcacheSessionStore.java:
31)
at
com.google.apphosting.runtime.jetty.SessionManager.loadSession(SessionManager.java:
320)
at
com.google.apphosting.runtime.jetty.SessionManager.getSession(SessionManager.java:
294)
at
org.mortbay.jetty.servlet.AbstractSessionManager.getHttpSession(AbstractSessionManager.java:
237)
at
org.mortbay.jetty.servlet.SessionHandler.setRequestedId(SessionHandler.java:
246)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
136)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
418)
at
com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:
249)
... 19 more
Caused by: java.lang.ClassNotFoundException:
org.springframework.social.connect.web.Foo
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at
com.google.apphosting.runtime.security.RuntimeClassLoader.loadFilteredClass(RuntimeClassLoader.java:
258)
at
com.google.apphosting.runtime.security.RuntimeClassLoader.loadPrivilegedClass(RuntimeClassLoader.java:
201)
at
com.google.apphosting.runtime.security.RuntimeClassLoader.loadClass(RuntimeClassLoader.java:
155)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at java.io.ObjectInputStream.resolveProxyClass(ObjectInputStream.java:
693)
at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:
1548)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:
1510)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:
1749)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368)
at java.util.HashMap.readObject(HashMap.java:1047)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
43)
at java.lang.reflect.Method.invoke(Method.java:616)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:
991)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:
1865)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:
1770)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:
1963)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:
1887)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:
1770)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368)
at
com.google.apphosting.runtime.jetty.SessionManager.deserialize(SessionManager.java:
382)
... 28 more
Does GAE not support placing proxy objects into the session?
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