Re: [Springframework-developer] SimpleConnectionHandle

[Marc L. <ma...@lo...>]

Hi,

ok i see. I didnt noticed that releaseConnection() gets called on 
getConnection(). Ok this makes sense and i will have a look at the 
mentioned DataStoreConnectionHandle.

thanks.



Juergen Hoeller wrote:
> The purpose of SimpleConnectionHandle is to hold an existing Connection
> reference. We can't close that reference in "releaseConnection", because
> "releaseConnection" is gonna be called once per "getConnection" call. So if
> the SimpleConnectionHandle will be access multiple times, it's always gonna
> return the same Connection, and we can't close until the original creator of
> the handle (who also supplied the Connection) decides to shut the handle
> down.
> 
> For an alternative implementation of ConnectionHandle, have a look at
> DefaultJdoDialect's DataStoreConnectionHandle: this illustrates how a handle
> can behave that fetches a fresh Connection for every "getConnection" call
> and consequently also closes the Connection for every "releaseConnection"
> call. In that particular, it uses JDO 2.0's Connection "borrowing", where
> the Connection needs to be returned to the PersistenceManager immediately
> after each operation; else the PersistenceManager would complain that we
> didn't return the Connection.
> 
> Juergen
> 
> 
> -----Original Message-----
> From: spr...@li...
> [mailto:spr...@li...]On Behalf
> Of Marc Logemann
> Sent: Thursday, June 16, 2005 10:43 PM
> To: spr...@li...
> Subject: [Springframework-developer] SimpleConnectionHandle
> 
> 
> Hi,
> 
> is there a reason that SimpleConnectionHandle does not supply a default
> releaseConnection implementation?
> 
> I wonder why releaseConnection() cant simply close the Connection it got
> upon creation. Instead people tend to close the connection in
> JDODialect childs in method releaseJdbcConnection() by getting the
> connection from the handle and close it there.


-- 
regards
Marc Logemann
[blog] http://www.logemann.org
[busn] http://www.logentis.de