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Subject: RE: ClassCastException while sharing objects accross applications
Date: Mon, 3 Oct 2005 23:41:11 -0700
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Thread-Topic: ClassCastException while sharing objects accross applications
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From: "Seva Popov" <seva_popov@tvworks.com>
To: "Tomcat Users List Surya Mishra"
 <"tomcat-user@jakarta.apache.orgsurya.mishra"@gmail.com>,
	"Tomcat Users List" <tomcat-user@jakarta.apache.org>

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The type in Java is a combination of a fully qualified class name and =
its defining classloader. So the two objects with the same class name =
are considered different types in your two web applications because each =
web application is loaded by the dedicated webapp classloader.
=20
To solve your problem you can use object serialization or if your =
objects are the java beans you can use the java.beans encoding.
=20
"The XMLEncoder class is a complementary alternative to the =
ObjectOutputStream and can used to generate a textual representation of =
a JavaBean in the same way that the ObjectOutputStream can be used to =
create binary representation of Serializable objects. " =20
=20
--Seva

________________________________

From: Surya Mishra [mailto:surya.mishra@gmail.com]
Sent: Mon 10/3/2005 4:12 PM
To: Tomcat Users List
Subject: ClassCastException while sharing objects accross applications


Hi,

I am trying to share an object between 2 applications deployed on the =
same
tomcat server. I have put the object in the ServletContext in my first
application. I access the object using
ServletContext.getContext("firstApp").getAttribute("object");.
The object comes in fine but it won't let me cast it to the actual =
Object
Type. I get a ClassCastException. I tried printing the name of the =
class.
That also came fine (same class name).

Thanks in advance.
-Surya


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