Re: [Springframework-developer] SimpleConnectionHandle

[Juergen H. <ju...@in...>]

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


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