Oh, by simply wiring the same spring bean definition for the jdbc datasource to both the jdbc template and Castor. Werner
________________________________
From: Sébastien PERES-LABOURDETTE - Public [mailto:[EMAIL PROTECTED]
Sent: Freitag, 23. Februar 2007 14:15
To: [email protected]
Subject: Re: [castor-user] CastorTransactionManager
This is it :
What is the standard way to use (or re-use) my jdo Database Datasource
to instantiate a JdbcTemplate the standard way :
new JdbcTemplate
<http://www.springframework.org/docs/api/org/springframework/jdbc/core/JdbcTemplate.html#JdbcTemplate%28javax.sql.DataSource%29>
(DataSource
<http://java.sun.com/j2se/1.5.0/docs/api/javax/sql/DataSource.html> dataSource)
?
Werner Guttmann a écrit :
Hi,
there's no rule that manadates that a JDBC template has to use
a JDBC connection that has been instantiated from within Castor. Just
instantiate a jdbcTemplate using the standard way, and Spring (together with
Castor's help and vice versa) will be able to figure that there's already an
active transaction associated with a given JDBC connection (and thus re-use it).
Werner
________________________________
From: Sébastien PERES-LABOURDETTE [mailto:[EMAIL
PROTECTED]
Sent: Freitag, 23. Februar 2007 12:40
To: [email protected]
Subject: Re: [castor-user] CastorTransactionManager
You are right, this is just what i wish to do, but how
do you get a JDBCTemplate working with a JDOManager (or a Database) since it
expects a DataSource ?
For native JDBC code (out of spring) this is easy with
Database.getJDBCConnection()
Werner Guttmann a écrit :
Yes, that is true. But the limitation is that
this still needs to run within the context of a Spring platform tx manager, as
all the code written is Spring-specific. In other words, I do not think that it
is possible to use things your way.
If you want to use Castor JDO and plain JDBC
from 'within' Spring, please consider using the JDBCTemplate classes, as this
is designed for exectly this need, i.e. to span transactions across multiple
datasources.
Regards
Werner
________________________________
From: Sébastien PERES-LABOURDETTE -
Public [mailto:[EMAIL PROTECTED]
Sent: Freitag, 23. Februar 2007 11:48
To: Castor User
Subject: [castor-user]
CastorTransactionManager
Hi.
Performance issues leads me to mix jdo
with some plain jdbc code.
For that reason, i wish to use the
spring orm implementation for castor.
I wrote a method :
public DataSource getDbDs(String
dbId) {
CastorTransactionManager ctm =
new CastorTransactionManager(_jdoMap.get(dbId));
return ctm.getDataSource();
}
_jdoMap being a map of JDOManagers
successfully initialized.
Each JDOManager points to a database
conf that maps a data-source such :
<data-source
class-name="org.apache.commons.dbcp.BasicDataSource">
<param
name="driver-class-name" value="com.informix.jdbc.IfxDriver" />
<param name="username"
value="informix" />
<param name="password"
value="informix" />
<param name="url"
value="jdbc:informix-sqli://url" />
<param name="maxActive"
value="10" />
<param name="initialSize"
value="3" />
<param
name="removeAbandoned" value="true" />
</data-source>
But the "getDbDs" method returns null
anyway.
Any issue ?
NB :
The javadoc for
"CastorTransactionManager" specifies this :
"With a CastorDialect specified, this
implementation also supports direct DataSource access within a transaction
(i.e. plain JDBC code working with the same DataSource). This allows for mixing
services that access Castor JDO (including transactional caching) and services
that use plain JDBC (without being aware of Castor JDO)! Application code needs
to stick to the same simple Connection lookup pattern as with
DataSourceTransactionManager (i.e. DataSourceUtils.getConnection)."
--
Sébastien PERES-LABOURDETTE
--
Cordialement,
Sébastien PERES-LABOURDETTE <mailto:[EMAIL PROTECTED]>
Responsable applications portail.
Service Informatique
<http://www.omerin.com> Tél : (+33)4-73-82-57-65
Fax : (+33)4-73-82-50-10
--
Sébastien PERES-LABOURDETTE
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