An RPC error While working with Hibernate In GWT Plotform

Question

I have been trying to use hibernate by fallowing the link gwt with hibernate but i'm getting tha fallowing error but i'm quite sure my Hibernate part is Working properly but when i'm trying to integrate hibernate with gwt it is giving the fallowing warning and data is not populating to client

    Starting Jetty on port 8888
   [WARN] Exception while dispatching incoming RPC call
com.google.gwt.user.client.rpc.SerializationException: Type 'com.SomeDTO' 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.SomeDTO@f8dc0f
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:619)
    at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:126)
    at com.google.gwt.user.client.rpc.core.java.util.Collection_CustomFieldSerializerBase.serialize(Collection_CustomFieldSerializerBase.java:44)
    at com.google.gwt.user.client.rpc.core.java.util.ArrayList_CustomFieldSerializer.serialize(ArrayList_CustomFieldSerializer.java:39)
    at com.google.gwt.user.client.rpc.core.java.util.ArrayList_CustomFieldSerializer.serializeInstance(ArrayList_CustomFieldSerializer.java:51)
    at com.google.gwt.user.client.rpc.core.java.util.ArrayList_CustomFieldSerializer.serializeInstance(ArrayList_CustomFieldSerializer.java:28)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl(ServerSerializationStreamWriter.java:740)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:621)
    at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:126)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter$ValueWriter$8.write(ServerSerializationStreamWriter.java:153)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue(ServerSerializationStreamWriter.java:539)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeClass(ServerSerializationStreamWriter.java:709)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl(ServerSerializationStreamWriter.java:748)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:621)
    at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:126)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter$ValueWriter$8.write(ServerSerializationStreamWriter.java:153)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue(ServerSerializationStreamWriter.java:539)
    at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:616)
    at com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess(RPC.java:474)
    at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:571)
    at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
    at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
    at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:263)
    at com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:178)
    at com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:91)
    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:62)
    at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:118)
    at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:113)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1088)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.Server.handle(Server.java:324)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
    at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:205)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)

bNd · Accepted Answer · 2012-12-19 12:52:04Z

1

hibernate-validator-*.jar must be in your war's WEB-INF/lib for this to work

answered Dec 19, 2012 at 12:52

bNd

7,6507 gold badges43 silver badges73 bronze badges

Sign up to request clarification or add additional context in comments.

11 Comments

SKM Over a year ago

thanks, yes just now i found it but still i'm getting the SerializationException even after fallowing the steps that are given in the link that i showed in my question i'm editin the question to show the error

bNd Over a year ago

A object which you used. did you implement IsSerializable? refer: developers.google.com/web-toolkit/doc/latest/…. i.e class SomeDTO implements Serializable, IsSerializable

SKM Over a year ago

I'm implementing Serializable Interface in my DTO Class, Do i need to implement IsSerializable also

bNd Over a year ago

Serializable classes must be included in a serialization policy, which is generated at compile time, while IsSerializable classes do not have that requirement.If you are working on pure gwt and DTO class not shared on web app or other app. so implement IsSerializable. and also Both Serializable & IsSerializable work

SKM Over a year ago

I've tried with both but still it is giving the same error, any suggestions, where i'm doing wrong

|

Sydney · Accepted Answer · 2012-12-20 08:59:54Z

1

I don't know if your issue is fixed but check that your entities implement Serializable and have an empty constructor.

answered Dec 20, 2012 at 8:59

Sydney

12.3k21 gold badges94 silver badges146 bronze badges

1 Comment

SKM Over a year ago

Yes i have both Serializable and empty constructor

SKM · Accepted Answer · 2012-12-31 12:05:53Z

I've found some simple solution for this problem. as i'm using gwt platform, I'm taking the help of SomeResult class (that implements Result Interface) instead of creating a new pojo class and populate it to client i'm creating a parameterised constructor in SomeResult that holds the db data and simply sends it to client.

the following is some sample code

    public class SomeActionResult implements Result {
        private String str;
        private int myInt;

    public SomeActionResult(String str,
         int myInt){
    this.str=str;
    this.myInt=myInt;
    }
    //getters&setters

}

in hibernate i will be having a method that will return SomeActionResult(str,myInt)

public class MyDao{
    public static SomeActionResult getData(){
    //a hibernate query to retrieve the data and set them to str, myInt

    retrun new SomeActionResult(str,myInt);
    }
}

now in my SomeActionHandler class execute() method i'm calling getData() as following

public SomeActionResult execute(SomeAction action,ExecutionContext){

return MyDao.getData();
}

Collectives™ on Stack Overflow

An RPC error While working with Hibernate In GWT Plotform

3 Answers 3

11 Comments

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

11 Comments

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related