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From "Dain Sundstrom (JIRA)" <j...@apache.org>
Subject [jira] Closed: (GERONIMO-4350) Connection proxying to imitate DissociatableManagedConnection can easily cause problems
Date Wed, 15 Oct 2008 17:06:44 GMT

     [ https://issues.apache.org/jira/browse/GERONIMO-4350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dain Sundstrom closed GERONIMO-4350.
------------------------------------

    Resolution: Invalid
      Assignee: David Jencks  (was: Dain Sundstrom)

The problem was in user code that was attempting to downcast a connection proxy to a specific
implementation class which is not allowed by the JEE Connector specification.

> Connection proxying to imitate DissociatableManagedConnection can easily cause problems
> ---------------------------------------------------------------------------------------
>
>                 Key: GERONIMO-4350
>                 URL: https://issues.apache.org/jira/browse/GERONIMO-4350
>             Project: Geronimo
>          Issue Type: Bug
>      Security Level: public(Regular issues) 
>          Components: connector
>    Affects Versions: 2.1, 2.2
>            Reporter: David Jencks
>            Assignee: David Jencks
>             Fix For: 2.1.4, 2.2
>
>
> We have some code to imitate the DissociatableManagedConnection to avoid connection leaks
that proxies connections from the supplied ManagedConnectionFactory: the proxy implements
all the interfaces of the connection, but not the class itself.  However, there's nothing
stopping the ConnectionFactory from casting the (now proxied) connection to the implementation
class it expects.
> The TxConnect project at sourceforge illustrates this approach in the EisConnectionFactory.
> http://txconnect.sourceforge.net
> One possible solution would be to have a flag to turn on this proxying behavior.  I don't
immediately see a way to detect if the problem will occur.

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