Re: PGConnection (LargeObject) / JNDI Tomcat Issue

Marc,

Here's some sample code:

PGConnection pgCon =
(PGConnection)((DelegatingConnection)con).getInnermostDelegate();

-- Mark Lewis

On Wed, 2006-01-18 at 12:37 -0500, Dave Cramer wrote:
> Marc,
>
> Check dbcp's documentation, there is a way to get the underlying
> connection.
>
> You will have to first cast to some dbcp connection, then get the
> connection and cast it.
>
> Dave
> On 18-Jan-06, at 11:56 AM, Marc SCHNEIDER wrote:
>
> > Hello,
> >
> > I have trouble to get Tomcat and JDBC work with LargeObject.
> >
> > I am using JNDI for database access
> >
> > <Resource name="jdbc/aguila" auth="Container"
> > type="java.sql.DataSource"/>
> > <ResourceParams name="jdbc/aguila">
> > <parameter>
> > <name>factory</name>
> > <value>org.apache.commons.dbcp.BasicDataSourceFactory</
> > value>
> > </parameter>
> > <parameter>
> > <name>driverClassName</name>
> > <value>org.postgresql.Driver</value>
> > </parameter>
> > <parameter>
> > <name>url</name>
> > <value>jdbc:postgresql://localhost:5432/intradev</value>
> > </parameter>
> > <parameter>
> > <name>username</name>
> > <value>myuser</value>
> > </parameter>
> > <parameter>
> > <name>password</name>
> > <value>mypass</value>
> > </parameter>
> > </ResourceParams>
> >
> > Here is my code :
> >
> > LargeObjectManager lom = ((org.postgresql.PGConnection)
> > this.connection).getLargeObjectAPI();
> >
> > I get the following error :
> >
> > java.lang.ClassCastException
> > This is because the connection is an instance of
> > org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper
> > and I'm trying to get a org.postgresql.PGConnection connection.
> >
> > I saw on the web that people used
> > org.postgresql.jdbc3.Jdbc3ObjectFactory but this class is available
> > with jdbc 7.x drivers only.
> >
> > I tried to use the org.postgresql.ds.common.PGObjectFactory class
> > but when I connect to the database I get the following error :
> > "no PostgreSQL user name specified in startup packet"
> >
> > Here is my config :
> > DB : PostgreSQL 8.0
> > Driver jdbc : postgresql-8.0-312.jdbc3.jar
> > Java Server : Tomcat 5.0.28
> > Os : Win XP
> >
> > Any idea ???
> >
> > Regards,
> > Marc SCHNEIDER.
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