Spring+JPA+Hibernate multiple databases - spring

Question

I am trying to connect to two databases with Spring and JPA. I am already connected to one database(sql server 2012), and I need to connect to another without changing too much stuff. I have app-context-dao.xml file which holds my hibernate and JPA configuration:
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:task="http://www.springframework.org/schema/task"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd
http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<aop:aspectj-autoproxy proxy-target-class="false" />
<jee:jndi-lookup id="dataSource" jndi-name="jdbc/SQLCMS" expected-type="javax.sql.DataSource" />
<jee:jndi-lookup id="dataSourceOracle" jndi-name="jdbc/razmjenskaDBSQL" expected-type="javax.sql.DataSource" />
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="hr.akd.cms.*" />
<property name="persistenceUnitName" value="caPersistenceUnit" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="generateDdl" value="false" />
<property name="databasePlatform" value="org.hibernate.dialect.SQLServer2012Dialect" />
<property name="showSql" value="false" />
</bean>
</property>
<!-- ..................
Initialize additional Hibernate JPA related properties
if required
.................. -->
<property name="jpaProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.show_sql">false</prop>
<prop key="hibernate.format_sql">true</prop>
</props>
</property>
</bean>
<bean id="entityManagerFactoryOracle"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSourceOracle" />
<property name="persistenceUnitName" value="userPersistenceUnit" />
<property name="packagesToScan" value="hr.akd.cms.*" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="generateDdl" value="false" />
<property name="databasePlatform" value="org.hibernate.dialect.SQLServer2012Dialect" />
<property name="showSql" value="false" />
</bean>
</property>
<!-- ..................
Initialize additional Hibernate JPA related properties
if required
.................. -->
<property name="jpaProperties">
<props>
<prop key="hibernate.show_sql">false</prop>
<prop key="hibernate.format_sql">true</prop>
</props>
</property>
</bean>
<!-- .................. Transaction manager setup .................. -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<bean id="transactionManagerOracle" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactoryOracle" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
<!-- .................. Spring data - declare base packages for scanning,
all classes extending from data repositories will be available for autowire
.................. -->
<jpa:repositories base-package="hr.akd.cms.repository"
factory-class="hr.akd.cms.repository.impl.CMSCustomRepositoryFactoryBean" />
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor">
<property name="defaultPersistenceUnitName" value="caPersistenceUnit"/>
</bean>
I added entityManagerFactoryOracle, dataSourceOracle jndi transactionManagerOracle for my second database. When I start my app I got this
Injection of persistence dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [javax.persistence.EntityManagerFactory] is defined: expected single bean but found 2: entityManagerFactory,entityManagerFactoryOracle
My factory bean looks like this:
public class CMSCustomRepositoryFactoryBean<R extends JpaRepository<T, I>, T, I extends Serializable>
extends JpaRepositoryFactoryBean<R, T, I> {
#SuppressWarnings("rawtypes")
protected RepositoryFactorySupport createRepositoryFactory(EntityManager entityManager) {
return new CMSSearchFactoryFactory(entityManager);
}
private static class CMSSearchFactoryFactory<T, I extends Serializable> extends JpaRepositoryFactory {
private EntityManager entityManager;
public CMSSearchFactoryFactory(EntityManager entityManager) {
super(entityManager);
this.entityManager = entityManager;
}
#SuppressWarnings("unchecked")
protected Object getTargetRepository(RepositoryMetadata metadata) {
return new CMSCustomRepositoryImpl<T, I>((Class<T>) metadata.getDomainType(), entityManager);
}
protected Class<?> getRepositoryBaseClass(RepositoryMetadata metadata) {
// The RepositoryMetadata can be safely ignored, it is used by the
// JpaRepositoryFactory
// to check for QueryDslJpaRepository's which is out of scope.
return CMSCustomRepository.class;
}
}

Answer 1

You must make one of the dataSource and entityManagerFactory primary . primary = "true"
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
primary = "true">