Using JDBC in Spring application - spring

Question

I am a newbie and am rather lost, would really appreciate some help.
I have a spring application which is currently setup for using JPA - using EntityManager. So the configuration files have something like
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
....
Spring injection is used to configure this, so I have a DaoImpl.java file which has
#PersistenceContext
protected EntityManager entityManager;
and EntityManager can be directly used in this java file.
However, I need to execute some native JDBC queries - EntityManager won't work. So I also need some kind of injection process here. My configuration files have
<bean id="dataSource" destroy-method="close"
class="org.apache.commons.dbcp.BasicDataSource" primary="true">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<property name="url"
value="jdbc:oracle:thin:#${database.host}:${database.port}:${database.instance}" />
.....
But how can I use some injection process to make jdbc calls please? Can I do so without using jdbcTemplate?
I have already tried to do get an SQL connection from the EntityManager, but I got errors as
Caused by: java.lang.IllegalStateException: Not allowed to create transaction on shared EntityManager - use Spring transactions or EJB CMT instead
I am trying to execute query
BEGIN ret := f_test(); END;
Would really appreciate some help...

Answer 1

Your entityManagerFactory bean needs additional configuration.
For example:
<jpa:repositories base-package="org.springbyexample.orm.repository" />
<bean id="transactionManager"
class="org.springframework.orm.jpa.JpaTransactionManager"
p:entityManagerFactory-ref="entityManagerFactory"/>
<jdbc:embedded-database id="dataSource" type="HSQL">
<jdbc:script location="classpath:/schema.sql" encoding="UTF-8" />
</jdbc:embedded-database>
<!-- This is how your EM should look like -->
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
p:dataSource-ref="dataSource"
p:persistenceUnitName="hsql">
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
</bean>
You can check it on spring documentation:
http://www.springbyexample.org/examples/spring-data-jpa.html