class suddenly no longer serializable

[Dennis Haupt]

the gwt compiler really needs an option to make it spill out why a class isn't serializable. i have one which i have used for weeks without a change, and suddenly, i get this error:

com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException: Type 'whatever' was not included in the set of types which can be deserialized by this SerializationPolicy or its Class object could not be loaded. For security purposes, this type will not be deserialized.

at com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException_FieldSerializer.instantiate(IncompatibleRemoteServiceException_FieldSerializer.java:16)

at com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException_FieldSerializer.create(IncompatibleRemoteServiceException_FieldSerializer.java:25)

at com.google.gwt.user.client.rpc.impl.SerializerBase.instantiate(SerializerBase.java:115)

at com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader.deserialize(ClientSerializationStreamReader.java:111)

at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamReader.readObject(AbstractSerializationStreamReader.java:119)

at com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceived(RequestCallbackAdapter.java:216)

at com.google.gwt.http.client.Request.fireOnResponseReceived(Request.java:287)

at com.google.gwt.http.client.RequestBuilder$1.onReadyStateChange(RequestBuilder.java:395)

at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:601)

at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)

at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)

at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:167)

at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:326)

at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:207)

no change has been made at the class or at any configuration xml. i did the "did i pull the plug"-checks, there's nothing wrong. what should i check next?

[Jeff Larsen]

Does your class contain a Collection where you could be putting an object that is not serializable? 

[Dennis Haupt]

the error message explicitly states that class x is not in the deserializationwhitelist.

i've experiences this before with another class (a simple enum, not fields at all)

2011/8/8 Jeff Larsen <lars...@gmail.com>

Does your class contain a Collection where you could be putting an object that is not serializable? 

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[Juan Pablo Gardella]

When I suddenly have this error is when have:

1) Cache some .js in the browser. Clean the cache and fix.

2) I have different versions of compiled classes in client side and server side. I sometimes put in webapp folder the .js files to run in tomcat inside eclipse and the forgot remove the folder. So when I make the war file it have older .js files.

Juan

2011/8/8 Dennis Haupt <d.ha...@googlemail.com>

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[Dennis Haupt]

in the rpc-files that class is configured as "true true false false". does that make sense? what could cause this?

2011/8/8 Dennis Haupt <d.ha...@googlemail.com>

[Dennis Haupt]

i just deleted and recompiled everything. still the same error. in one of my rpc-files, the class is "true true true true", in all others its "true true false false". changing it manually does help in hosted mode. wtf is this?

[Dennis Haupt]

my solution:

/**

* do not delete this method. the gwt compiler refuses to enable deserialization of "ViewableKey" on client side

* because of its generic parameter, even if it's only used with serializable ones. i don't know why it worked before.

*/

void hackToMakeTheGWTCompilerPutViewableKeyIntoTheWhiteList(final ViewableKey<String> key,

final AsyncCallback<Void> async);

2011/8/8 Dennis Haupt <d.ha...@googlemail.com>