spring how to write config to support 2 database - spring

Question

i try to config a data source ----> mysql
the other data source ----> h2 in memory (embedded )
with the following config:
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
p:driverClassName="com.mysql.jdbc.Driver" p:url="jdbc:mysql://localhost/item"
p:username="" p:password="" />
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"
p:dataSource-ref="dataSource">
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.cache.use_second_level_cache">true</prop>
<prop key="hibernate.cache.region.factory_class">net.sf.ehcache.hibernate.EhCacheRegionFactory</prop>
<prop key="net.sf.ehcache.configurationResourceName">/ehcache.xml</prop>
</props>
</property>
<property name="packagesToScan" value="*************" />
</bean>
<!-- Spring transaction management -->
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager"
p:sessionFactory-ref="sessionFactory" />
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="org.h2.tools.Server" class="org.h2.tools.Server" scope="singleton" factory-method="createTcpServer"
init-method="start" depends-on="org.h2.tools.Server-WebServer">
<constructor-arg value="-tcp,-tcpAllowOthers,true,-tcpPort,9092"/>
</bean>
<bean id="org.h2.tools.Server-WebServer" class="org.h2.tools.Server" scope="singleton" factory-method="createWebServer" init-method="start">
<constructor-arg value="-web,-webAllowOthers,true,-webPort,8082"/>
</bean>
<!-- notice that loading the Driver as a bean is unnecessary is most cases! u could safely remove this and the depends-on in the next bean -->
<bean id="H2DatabaseJDBCDriver" class="org.h2.Driver" scope="singleton" init-method="load" depends-on="org.h2.tools.Server"/>
<bean id="H2InMemoryDB"
class="org.springframework.jdbc.datasource.DriverManagerDataSource"
depends-on="org.h2.tools.Server">
<property name="driverClassName" value="org.h2.Driver" />
<property name="url" value="jdbc:h2:mem:appdb1;DB_CLOSE_DELAY=-1" />
<!-- ;TRACE_LEVEL_FILE=3;TRACE_LEVEL_SYSTEM_OUT=3 -->
<property name="username" value="sa" />
<property name="password" value="" />
</bean>
<bean id="H2InMemoryDBPool" class="org.apache.commons.pool.impl.GenericObjectPool">
<!-- Two connections: InMemoryEntityManagerFactory and transactionManager -->
<property name="minIdle" value="1"/>
<property name="maxWait" value="10"/>
<property name="maxActive" value="10"/>
<property name="maxIdle" value="10"/>
<property name="minEvictableIdleTimeMillis" value="300000"/>
<property name="timeBetweenEvictionRunsMillis" value="60000"/>
</bean>
<bean id="H2InMemoryDBDSConnFactory" class="org.apache.commons.dbcp.DataSourceConnectionFactory">
<constructor-arg><ref bean="H2InMemoryDB"/></constructor-arg>
</bean>
<bean id="H2InMemoryDBPoolableConnFactory" class="org.apache.commons.dbcp.PoolableConnectionFactory">
<constructor-arg index="0"><ref bean="H2InMemoryDBDSConnFactory"/></constructor-arg>
<constructor-arg index="1"><ref bean="H2InMemoryDBPool"/></constructor-arg>
<constructor-arg index="2"><null/></constructor-arg>
<constructor-arg index="3"><null/></constructor-arg>
<constructor-arg index="4"><value>false</value></constructor-arg>
<constructor-arg index="5"><value>true</value></constructor-arg>
</bean>
<bean id="pooledInMemoryDB" class="org.apache.commons.dbcp.PoolingDataSource" depends-on="H2InMemoryDBPoolableConnFactory">
<constructor-arg><ref bean="H2InMemoryDBPool"/></constructor-arg>
</bean>
<bean id="sessionFactory2"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"
p:dataSource-ref="pooledInMemoryDB">
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.H2Dialect</prop>
<prop key="hibernate.show_sql">false</prop>
</props>
</property>
<property name="packagesToScan" value="********" />
</bean>
<bean id="transactionManager2"
class="org.springframework.orm.hibernate3.HibernateTransactionManager"
p:sessionFactory-ref="sessionFactory" />
but its not work .
so my question is :
do i need to use 2 session factory or using dynamic data source switch ?
Thanks

Answer 1

I did find a typo that may cause you code to break.
Your second transactionmanager refers to the first sessionFactory. I think you want it to refer to the second transactionmanager. Try:
<bean id="transactionManager2"
class="org.springframework.orm.hibernate3.HibernateTransactionManager"
p:sessionFactory-ref="sessionFactory2" />
Regarding your question whether one has to use some sort of "dynamic data source switch" as described here, multiple data sources should just be fine.

Answer 2

i use
<jdbc:embedded-database id="embeddedDatasource" type="DERBY">
<jdbc:script location="classpath:test.sql"/>
</jdbc:embedded-database>
instead
it works