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From "Agilan Palani" <agi...@bntasia.com>
Subject RE: Getting connection from ibatis
Date Fri, 07 Oct 2005 02:03:48 GMT


I hope that iam not clear in stating why I need a direct connection from
IBATIS, will correctly state is now.

My project runs in JBoss in one location and in tomcat in other places.
Code base is same. There are some java EOD programs which will also run as
separate process using IBATIS.

Tomcat is not configured with a datasource but JBoss is.
Hence I managed to define two <context> tags in the ibatis config file, and
I will choose the context dynamically based on the server in which the
project runs.
The first context will use datasource and the other will use simple jdbc
connection pool.

Some of our code were using oracle tag libraries and some servlets to get
oracle images and streaming media from the database. These tag libraries
expect a connection to be passed to it.

Hence I need to get the connection from IBATIS, where IBATIS will inturn get
the connection from the configured DataSource or the connection pool,
whatever it is configured to.

I had done some home work to get the connection from IBATIS, but not sure
whether iam doing it right. The following works when I use a SIMPLE JDBC
connection pool configuration, but doesn't work when I use the datasource.

Properties pCnf = new Properties();

------------------------------         
if( "direct".equals(dbCtx) ){
     pCnf.put("ibatis.mapping.config","conf/sql-map-config.xml");
}else{
	pCnf.put("ibatis.mapping.config","conf/sql-map-config-ds.xml");
}
daoManager = DaoManagerBuilder.buildDaoManager(reader,pCnf);
csafeDAO = (CsafeDAO) getDaoManager().getDao(CsafeDAO.class);

------------------------------

  public Connection getConnection(){
    	return ( (ConnectionDaoTransaction) 
    		daoManager.getTransaction(csafeDAO) ).getConnection();
    }
    
------------------------------

conn = getConnection();
stm = conn.createStatement();            
rs = stm.executeQuery(query);
// Fetch the underlying resultset from the JBoss Wrap
//if the connection is from datasource
if (rs instanceof org.jboss.resource.adapter.jdbc.WrappedResultSet ) {
	rs = ((org.jboss.resource.adapter.jdbc.WrappedResultSet)
rs).getUnderlyingResultSet();
	}
            
// then cast to the OracleResultSet 
OracleResultSet oraRs = (OracleResultSet) rs;
                    
if(oraRs.next()){
	image = 	(OrdImage)
oraRs.getORAData("image",OrdImage.getORADataFactory());  
}

---------------------

If I use simple JDBC it works, but when datasource is used it throws the
ClassCastException when I cast the resultset to OracleResultSet, any inputs?


06-Oct PM 5:54:02 ERROR [bl.ORDImageBO].getImageFromDB() Connection to DB
failed: java.lang.ClassCastException: $Proxy64
java.lang.ClassCastException: $Proxy64
	at
com.bntasia.vivo.app.bl.ORDImageBO.getImageFromDB(ORDImageBO.java:254)
	at
com.bntasia.vivo.app.bl.ORDImageBO.getImageFromDB(ORDImageBO.java:181)
	at
com.bntasia.vivo.app.bl.ORDImageBO.getAssetTypeImageFromDB(ORDImageBO.java:1
18)



-----Original Message-----
From: Agilan Palani [mailto:agilan@bntasia.com] 
Sent: Thursday, October 06, 2005 10:16 PM
To: user-java@ibatis.apache.org; lmeadors@apache.org
Subject: RE: Getting connection from ibatis
Importance: High


Thanks, but, do you have any answer to get the connection directly? Another
project is running on a web-server which doesn't have a datasource, but uses
IBATIS



-----Original Message-----
From: larry.meadors@gmail.com [mailto:larry.meadors@gmail.com] On Behalf Of
Larry Meadors
Sent: Thursday, October 06, 2005 10:04 PM
To: user-java@ibatis.apache.org
Subject: Re: Getting connection from ibatis

That is what I would do, yes.

Larry


On 10/6/05, Agilan Palani <agilan@bntasia.com> wrote:
> Iam already using a datasource for IBATIS, do you mean I need to lookup
that
> datasource again by-passing IBATIS and pass it to the taglib?
>
>
> -----Original Message-----
> From: larry.meadors@gmail.com [mailto:larry.meadors@gmail.com] On Behalf
Of
> Larry Meadors
> Sent: Thursday, October 06, 2005 8:12 PM
> To: user-java@ibatis.apache.org
> Subject: Re: Getting connection from ibatis
>
> The simplest way is to use JNDI for your datasource / transaction manager.
>
> Larry
>
> On 10/6/05, Agilan Palani <agilan@bntasia.com> wrote:
> >
> >
> >
> > Hi
> >
> >
> >
> > Iam using ibatis in my project, with JBoss application server.
> >
> >
> >
> > I have some taglibs from oracle which uploads ORDImages (Oracle specific
> > objects) to the database
> >
> > <ord:storeMedia >
> >
> > These tags either need  a connection or datasource, passed as one of its
> > argument to perform its task.
> >
> > Those tags will take care of committing and closing the connections.
> >
> >
> >
> > Q1. How do I get the connection from IBATIS?
> >
> > Q2. How do I get the datasource from IBATIS?
> >
> >
> >
> >             Any help will be very useful, thanks in advance.
> >
> >
> >
> > Regards
> >
> > Agilan Palani
>
>


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