I'm studying Spring MVC and Hibernate. I had no problems handling database connections and queries with Spring mvc (MySql DB).
Now, I'm trying to use Hibernate and I found it intricate:
create a hibernate configuration file, create a class for retrieving SessionFactory, create a xml file for any persistent object etc.
I'm sure there's a simplest way that allow me to do an easy configuration using just:
the Spring xml configuration file
annotation (in persistent object classes)
What iI want to reach is something like the following. I saw a similar code in an example, but now I'm no more able to find it on the internet
xxxx-servlet.xml
<bean id="SessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="com.springgestioneerrori.model" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.connection.autocommit">true</prop>
<prop key="hibernate.show_sql">false</prop>
<prop key="hibernate.format_sql">true</prop>
<prop key="hibernate.use_sql_comments">false</prop>
</props>
</property>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource" >
<property name="driverClass" value="com.mysql.jdbc.Driver" />
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/dbName" />
<property name="user" value="root" />
<property name="password" value="root" />
</bean>
In the code above, I suppose, that what it's not correct is my dataSource bean. Does anybody know the way to reach my goal?
Thank everybody!
i think your properties names inside the 'data source' bean should be like the following :
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/dbName" />
<property name="username" value="root" />
<property name="password" value="root" />
so instead of driverClass , it should be driverClassName and so on ..
and please refer to this answer here , it talks about using spring DriverManagerDataSource vs apache BasicDataSource .
Hope that Helps
Everything must be correct, but I'd want to offer you to use *.properties to keep connection configuration to your DB like that
in appContext.xml:
<!-- JDBC DataSource bean -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:properties/database.properties</value>
</list>
</property>
</bean>
in database.properties:
jdbc.driverClassName = com.mysql.jdbc.Driver
jdbc.schema = schema
jdbc.url = jdbc:mysql://localhost:3306/schema
jdbc.username = root
jdbc.password = password
And what interferes you to use annotations in your classes?
Related
Where should I configure connection pool for spring + hibernate application?
<bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="packagesToScan" value="edu.khai.education.entity"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.dialect">org.hibernate.dialect.H2Dialect</prop>
</props>
</property>
</bean>
<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
<property name="driverClassName" value="org.h2.Driver"/>
<property name="url" value="jdbc:h2:tcp://localhost/~/test"/>
<property name="username" value="sa"/>
<property name="password" value=""/>
</bean>
<bean id="txManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
I want to use org.hibernate.hikaricp.internal.HikariCPConnectionProvider and I don't have a problem to configure it in Hibernate application, but I don't know how to integrate it with Spring.
Spring uses DataSource bean to create a lot of infrastructure code e.g. JdbcTemplate or Spring Data JPA #Repository.
Replace the current data source implementation org.apache.commons.dbcp2.BasicDataSource with the com.zaxxer.hikari.HikariDataSource class. Change the current properties to match the HikariCP configuration.
I'm working on spring boot application, which already has a database connection established in its applicationContext.xml file and the necessary transaction manager and vendors etc.
I now need to connect the app to a second database. But I'm having issues with this. In my unit tests the connection is fine and can make simple queries to retrieve data, which is all I need it to do. However when I compile the app into a jar and run it, I get the following error
NoUniqueBeanDefinitionException: No qualifying bean of type "org.springframework.transaction.PlatformTransactionManager" available: expected single matching bean but found 2: transactionManager, transactionManager2
I have spent ages looking up how to solve this, and the suggested fixes I have found here , here and here have not worked.
I have one persistence.xml with two persistence units defined. And in my applicaitonContext.xml I defined two datasources, two transaction managers and two entity Manager Factories. I then use the #persitsencecontext and #Transactional("") annotations to say which persistence unit and managers to use, but I still get an error. I also added in the <qualifier> tag to the app context file, as I saw this as a suggested fix with the #transactional annotation, still no luck.
My code is below, can anyone spot an errors I have made, and why it may not be working as expected
applicationContext.xml
<bean id="dataSource1" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="org.hsqldb.jdbcDriver"/>
<property name="url" value="..."/>
<property name="username" value="..."/>
<property name="password" value="..."/>
</bean>
<bean id="entityManagerFactory" name="proxy">
<property name="persistenceUnitName" value="proxy" />
<property name="persistenceUnitXmlLocation" value="classpath:META-INF/persistence.xml" />
<property name="dataSource" ref="dataSource1" />
<property name="jpaVendorAdapter" ref="hiberanteVendorAdapter" />
<property name="jpaProperties">
<props>
<prop key="hiberante.hbm2ddl.auto">valudate</prop>
</props>
</property>
</bean>
<bean id="hibernateVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="databasePlatform" value="org.hibernate.dialect.HSQLDialect" />
<property name="database" value="HSQL" />
<property name="showSql" value="true" />
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
<qualifier value="transactionManager1" />
</bean>
<!-- Second datasource -->
<bean id="dataSource2" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="org.hsqldb.jdbcDriver"/>
<property name="url" value="..."/>
<property name="username" value="..."/>
<property name="password" value="..."/>
</bean>
<bean id="entityManagerFactory2" name="proxy">
<property name="persistenceUnitName" value="proxy2" />
<property name="persistenceUnitXmlLocation" value="classpath:META-INF/persistence.xml" />
<property name="dataSource" ref="dataSource2" />
<property name="jpaVendorAdapter" ref="hiberanteVendorAdapter2" />
<property name="jpaProperties">
<props>
<prop key="hiberante.hbm2ddl.auto">valudate</prop>
</props>
</property>
</bean>
<bean id="transactionManager2" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory2" />
<qualifier value="transactionManager2" />
</bean>
<bean id="hibernateVendorAdapter2" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
<tx:annotation-driven/>
Implementation
#Repository
#Transactional("transactionManager2")
public class myDaoImpl extends GenericJPADao<Integer, Integer> implements ImyDao {
#PersistenceContext(unitName="proxy2")
protected EntityManager em;
}
SOLUTION
The accepted answer was the correct solution for me, but a few things to note. The beans have to point to their respective entityManagerFactory's and you need to be careful on which bean you set the autowire-candidate="false" on, as I set it on the incorrect one at first, and had transactions rolled back as a result. I think there could be cleaner solution to this, but as a quick fix it works fine
try this :
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager" autowire-candidate="false">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<bean id="transactionManager2" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
I am using Spring in a standalone desktop application along with JPA and Hibernate. So what i need is a global entity manager, provided by spring. The thing is, i use the ClassPathXmlApplicationContext and constructor injection, because i prefer my classes to be totally free of any framework.
So a bean in my ApplicationContext.xml basically looks like this:
<bean id="bookingDAO" class="dk.gokartland.booking.dao.BookingDAO">
<constructor-arg name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
So i do the actual wiring myself.
So what i've done until now is pass the EntityManagerFactory to my DAOs, but this doesn't really work when i close it manually. So i would like to pass the same EntityManager around.
http://docs.spring.io/spring/docs/3.0.x/spring-framework-reference/html/orm.html#orm-jpa
The LocalEntityManagerFactoryBean sounds like what i need, but i do not know how to map it through the applicationContext.xml.
My current JPA configuration looks like:
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="packagesToScan" value="dk.gokartland.booking.domain"/>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">create-drop</prop>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="#{database['jdbc.url']}"/>
<property name="username" value="#{database['jdbc.username']}"/>
<property name="password" value="#{database['jdbc.password']}"/>
</bean>
Now somehow i need to be able to to something like this:
<bean id="bookingDAO" class="dk.gokartland.booking.dao.BookingDAO">
<constructor-arg name="entityManager" ref="entityManager"/>
</bean>
Hope someone has a simple solution :)
Earlier I had datasource configured in the application server itself and I am passing it to application level hbr.xml file as
<property name="hibernate.connection.datasource">java:comp/env/jdbc/myDataSource</property>
Now I have configured datasource in applicationContext.xml as
<bean id="mydatasource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver" />
<property name="url"
value="jdbc:sqlserver://localhost:1433;databaseName=mydatasource;maxPoolSize=100" />
<property name="username" value="sa" />
<property name="password" value="${database.password}"/>
</bean>
How to pass this to hbr.xml file?
Based on the given below my another question is that what should be the class for my session factory? Should it be org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean
OR
org.springframework.orm.hibernate3.LocalSessionFactoryBean
Inject the datasource along with the hibernate mappings into your DAOs:
<bean id="mydatasource" ...>
...
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="mydatasource" />
<property name="mappingResources">
<list>
<value>path/to/your/mappings.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props><!-- see http://docs.jboss.org/hibernate/orm/3.3/reference/en/html/session-configuration.html -->
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
....
</props>
</property>
...
</bean>
Using annotations you could access your datasource through the injected bean
#Resource
private SessionFactory sessionFactory;
...
Session session = this.sessionFactory.getCurrentSession();
I have Hibernate Transaction manager configured inside Spring MVC controller.
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="org.postgresql.Driver" />
<property name="url" value="jdbc:postgresql://127.0.0.1/doolloop2" />
<property name="username" value="doolloop2" />
<property name="password" value="doolloop" />
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="mappingLocations">
<list>
<value>WEB-INF/mapping/User.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
</bean>
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
In Addition, I have some class which needs to get Hibernate Dialect inside on of it method.
Is class is not Configured as bean inside Spring Framework.
How can I access Hibernate Dialect property from this class? I believe it should be some static class,but I don't know how can I do it. Please help.
You could separate the properties from the spring config. Put them in a properties file, then reference that in a PropertyPlaceholderConfigurer bean ( http://almaer.com/blog/spring-propertyplaceholderconfigurer-a-nice-clean-way-to-share ). Then you could inject that value into whatever bean it is that you need the value in the same way you are injecting it into the sessionFactory bean.