I came across this strage problem...
I have this entity bean
@Entity
public class User implements IsSerializable{
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue
private Long id;
@Column
private String name;
@Column
private String password;
//... getters and setters...
}
If I send this bean over an RPC call, I get an
com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException:
Invalid type signature for com.dinc.bandmplace.client.model.User
at com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:298)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall
(RemoteServiceServlet.java:164)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost
(RemoteServiceServlet.java:86)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
487)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1093)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter
(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1084)
at com.google.appengine.tools.development.StaticFileFilter.doFilter
(StaticFileFilter.java:121)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1084)
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:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
405)
at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle
(DevAppEngineWebAppContext.java:54)
at org.mortbay.jetty.handler.HandlerWrapper.handle
(HandlerWrapper.java:139)
at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:313)
at org.mortbay.jetty.handler.HandlerWrapper.handle
(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
506)
at org.mortbay.jetty.HttpConnection$RequestHandler.content
(HttpConnection.java:844)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
at org.mortbay.io.nio.SelectChannelEndPoint.run
(SelectChannelEndPoint.java:396)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run
(BoundedThreadPool.java:442)
Caused by: com.google.gwt.user.client.rpc.SerializationException:
Invalid type signature for com.dinc.bandmplace.client.model.User
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.validateTypeVersions
(ServerSerializationStreamReader.java:737)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.deserialize
(ServerSerializationStreamReader.java:492)
at
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamReader.readObject
(AbstractSerializationStreamReader.java:61)
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader
$ValueReader$8.readValue(ServerSerializationStreamReader.java:131)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.deserializeValue
(ServerSerializationStreamReader.java:372)
at com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:287)
If I remove the @Id and @GeneratedValue annotations, all runs fine...
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