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From Kevan Miller <kevan.mil...@gmail.com>
Subject Re: Is java.util.date not supported by remote interface??
Date Mon, 04 Aug 2008 02:58:33 GMT
Cross-posting to OpenJPA list... Hopefully, they'll have some insight...

--kevan



On Aug 1, 2008, at 6:05 PM, David Blevins wrote:

>
> On Aug 1, 2008, at 12:18 PM, rbaumhof wrote:
>
>>
>> Hello at Geronimo,
>>
>> i have a fine working geronimo web application. All calls from  
>> tomcat are
>> passed to the ejb container by local interfaces. Now i want to  
>> create for
>> special users a second java swing application. This of course works  
>> with
>> remote interfaces. Most calls towards the new remote interfaces  
>> (which are
>> identical to the local interfaces) are working, but some of them  
>> don't work
>> because the data objects returned from the ejb container have  
>> java.util.date
>> properties. It seems that they can not be passed over the remote  
>> interface.
>>
>> Error message:
>> Exception on login:Unknown Container Exception:  
>> java.rmi.RemoteException:
>> Cannot read the response from the server.  The class for an object  
>> being
>> returned is not located in this system:; nested exception is:
>> 	java.lang.ClassNotFoundException:
>> org.apache.openjpa.util.java$util$Date$proxy
>>
>> If i omit the java.util.date objects the service call succeds. I am
>> surprised that this simple data type is not supported by the remote
>> interfaces. Can i do anything to make it work??
>
> Looks like OpenJPA is subclassing the java.util.Date class so what's  
> passed is actually not the simple data type you're expecting but  
> rather an instance of org.apache.openjpa.util.java$util$Date$proxy,  
> whatever that is.  It looks like a dynamically generated class,  
> which could be tricky.
>
> Anyone from the OpenJPA crowd know which jars might have to be  
> included in the client classpath to deserialize a  
> org.apache.openjpa.util.java$util$Date$proxy?
>
> Also, have you ever considered using a writeReplace method in the  
> org.apache.openjpa.util.java$util$Date$proxy class so that it can be  
> swapped out for a plain java.util.Date instance upon serialization?
>
> -David
>


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