Hi all.
I have the following problem.
My project tries to use GWT RPC.
It has one jar in dependency libs which contain several model classes.
All of that classes implements Serializable and IsSerializable
interfaces (one of that classes is CHAttrGroup). That jar also
includes .java files with source code and Module.gwt.xml file so that
model classes can be used in main GWT application by including
<inherits name="...." />.
GWT compiler (2.0-rc1) doesn't write error messages when building
application and all that model classes (e.g. CHAttrGroup) work
correctly in client-side code (like other gwt client classes). But
when I try to send objects of that class from server to client I get
following exception:
2009-11-22 02:34:49.688:tasktrackgwt:WARN: Exception while
dispatching incoming RPC call
com.google.gwt.user.client.rpc.SerializationException:
java.lang.reflect.InvocationTargetException
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeWithCustomSerializer
(ServerSerializationStreamWriter.java:760)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
(ServerSerializationStreamWriter.java:723)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
(ServerSerializationStreamWriter.java:612)
at
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
(AbstractSerializationStreamWriter.java:129)
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
$ValueWriter$8.write(ServerSerializationStreamWriter.java:152)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
(ServerSerializationStreamWriter.java:534)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeClass
(ServerSerializationStreamWriter.java:700)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
(ServerSerializationStreamWriter.java:730)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
(ServerSerializationStreamWriter.java:612)
at
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
(AbstractSerializationStreamWriter.java:129)
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
$ValueWriter$8.write(ServerSerializationStreamWriter.java:152)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
(ServerSerializationStreamWriter.java:534)
at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:607)
at com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess
(RPC.java:465)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse
(RPC.java:562)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall
(RemoteServiceServlet.java:188)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost
(RemoteServiceServlet.java:224)
at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost
(AbstractRemoteServiceServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at com.google.inject.servlet.ServletDefinition.doService
(ServletDefinition.java:216)
at com.google.inject.servlet.ServletDefinition.service
(ServletDefinition.java:141)
at com.google.inject.servlet.ManagedServletPipeline.service
(ManagedServletPipeline.java:93)
at com.google.inject.servlet.FilterChainInvocation.doFilter
(FilterChainInvocation.java:63)
at com.google.inject.servlet.ManagedFilterPipeline.dispatch
(ManagedFilterPipeline.java:122)
at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:
110)
at org.mortbay.jetty.servlet.ServletHandler$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.ContextHandlerCollection.handle
(ContextHandlerCollection.java:230)
at org.mortbay.jetty.handler.HandlerCollection.handle
(HandlerCollection.java:114)
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:
536)
at org.mortbay.jetty.HttpConnection$RequestHandler.content
(HttpConnection.java:930)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:747)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:405)
at org.mortbay.io.nio.SelectChannelEndPoint.run
(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run
(QueuedThreadPool.java:582)
Caused by: java.lang.reflect.InvocationTargetException
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.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeWithCustomSerializer
(ServerSerializationStreamWriter.java:742)
... 42 more
Caused by: com.google.gwt.user.client.rpc.SerializationException: Type
'ru.codehouse.tasktrack.model.objects.CHAttributeGroup' was not
included in the set of types which can be serialized by this
SerializationPolicy or its Class object could not be loaded. For
security purposes, this type will not be serialized.: instance =
ru.codehouse.tasktrack.model.objects.CHAttributeGroup[id=10]
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
(ServerSerializationStreamWriter.java:610)
at
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
(AbstractSerializationStreamWriter.java:129)
at
com.google.gwt.user.client.rpc.core.java.util.Collection_CustomFieldSerializerBase.serialize
(Collection_CustomFieldSerializerBase.java:43)
at
com.google.gwt.user.client.rpc.core.java.util.ArrayList_CustomFieldSerializer.serialize
(ArrayList_CustomFieldSerializer.java:36)
... 47 more
GWT serialization policy file contains following line:
ru.codehouse.tasktrack.model.objects.CHAttribute, false, false, true,
true, ru.codehouse.tasktrack.model.objects.CHAttribute/3607536941,
3607536941
which tells us that field and instant serialization is not permitted
(first, and second 'false's) and that field and instance
deserialization is permitted (3rd and 4th 'true's).
How can I enable serialization of my model objects ?
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