Re: Is Serializable compulsary for RPC

Hi,

Yes, IsSerializable or java.io.Serializable are compulsory

see http://code.google.com/webtoolkit/doc/1.6/FAQ_Server.html#Does_the_GWT_RPC_system_support_the_use_of_java.io.Serializable

regards
didier

On Nov 2, 12:36 pm, jayalakshmi jahagirdar
<jayalakshmi.jahagir...@gmail.com> wrote:
> hello all,
> Iam trying to pass a object of the class from server to client using RPC
> mechanism.And the class which am using is a nested class.In which i have
> properties of dashboard.
> The class is not implementing Serializable interface.Is it necessary to
> implement the Serializable interface?
> Iam getting the following error:
>
> SEVERE: 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$8.write(ServerSerializationStreamWriter.java:152)
>  at
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue(ServerSerializationStreamWriter.java:534)
>  at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:609)
>  at
> com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess(RPC.java:467)
>  at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:564)
>  at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:188)
>  at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:224)
>  at
> com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
>  at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
>  at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>  at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>  at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>  at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>  at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>  at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
>  at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>  at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>  at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
>  at
> org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:861)
>  at
> org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
>  at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1584)
>  at java.lang.Thread.run(Thread.java:619)
> 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)
>  ... 25 more
> Caused by: com.google.gwt.user.client.rpc.SerializationException: Type
> 'com.mycompany.project.server.Dashboard' 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 = com.mycompany.project.server.Dashboard@10ffb38
>  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)
>  ... 30 more
>
> Or is there any other way by which i can implement it.(eg requestbuilder )
>
> Plz guide me.
> Regards
> Jayalakshmi

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