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Error using Hibernate with H2 in database

I'm working with Hibernate. How can I configure my applicationContext.xml to have an H2 in-memory databaseorg.hibernate.dialect.H2Dialect dont work
Spring configuration
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<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="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" >
<property name="dataSource" ref="dataSource"></property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.H2Dialect</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
</props>
</property>
<property name="packagesToScan">
<list>
<value>com.emusicstore</value>
</list>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>

You are not connecting to an in-memory database. Your JDBC URL is for network connection to localhost:
jdbc:h2:tcp://localhost/~/test
To use the in-memory H2 the URL must look like this, containing mem:
jdbc:h2:mem:testdb
In the manual, see the section on In-Memory Database

Use embedded db datasource (with dbcp connection pool) instead of drivermanager datasource.
<jdbc:embedded-database id="dataSource" type="H2">
<jdbc:script location="classpath:db/sql/create-db.sql" />
<jdbc:script location="classpath:db/sql/insert-data.sql" />
</jdbc:embedded-database>
<bean id="dbcpDataSource" class="org.apache.commons.dbcp2.BasicDataSource">
<property name="driverClassName" value="org.h2.Driver" />
<property name="url" value="jdbc:hsqldb:mem:dataSource" />
<property name="username" value="username" />
<property name="password" value="password" />
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" >
<property name="dataSource" ref="dbcpDataSource"></property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.H2Dialect</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
</props>
</property>
<property name="packagesToScan">
<list>
<value>com.emusicstore</value>
</list>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>

org.springframework.transaction.InvalidIsolationLevelException

I remix Spring Data and Hibernate in my Application to access MS-SQL Data.
In My All Service class,I set #Transactional(readOnly=true) in front of the class name.Recently,I observe some DB Table Locks occurrence.
Otherwise,I set#Transactional(readOnly=true,isolation = Isolation.READ_UNCOMMITTED) to avoid DB Table lock,but it throws
org.springframework.transaction.InvalidIsolationLevelException: Standard JPA does not support custom isolation levels - use a special JpaDialect for your JPA implementation.
How can I modify the XML to use isolation = Isolation.READ_UNCOMMITTED for dirty read?
<!-- JPA Configurations -->
<!-- <jee:jndi-lookup id="myContactDataSource" jndi-name="jdbc/GNWEB" lookup-on-startup="false"
proxy-interface="javax.sql.DataSource"/> -->
<!-- use annotation in Service: #Transactional -->
<bean id="transactionManager2" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
<qualifier value="transactionManager2"/>
</bean>
<bean id="oracleConnection" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName">
<value>java:comp/env/jdbc/OracleDB</value>
</property>
</bean>
<bean id="oracleTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="oracleConnection" />
<qualifier value="oracleConnectionTransactionManager"/>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager" />
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="mssqlDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver" />
<property name="url">
<value>${connection.url}</value>
</property>
<property name="username">
<value>${connection.username}</value>
</property>
<property name="password">
<value>${connection.1qaz#WSX}</value>
</property>
</bean>
<bean id="auditInterceptor" class="com.bot.gnweb.unit.AuditIntercepter"/>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" destroy-method="destroy">
<property name="dataSource" ref="mssqlDataSource" />
<property name="entityInterceptor" ref="auditInterceptor"/>
<property name="packagesToScan">
<value>com.bot.gnweb.model</value>
</property>
<property name="mappingResources">
<list>
<value>gnwebSql.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</prop>
<prop key="hibernate.dialect">com.bot.gnweb.model.MssqlCustomDialect</prop>
<prop key="hibernate.cache.use_second_level_cache">true</prop>
<prop key="hibernate.cache.use_query_cache">true</prop>
<prop key="net.sf.ehcache.configurationResourceName">ehcache.xml</prop>
<prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory</prop>
<prop key="hibernate.generate_statistics">true</prop>
</props>
</property>
</bean>
<bean
class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" depends-on="auditInterceptor">
<property name="persistenceProviderClass" value="org.hibernate.ejb.HibernatePersistence" />
<property name="persistenceUnitName" value="gnWebPU" />
<property name="dataSource" ref="mssqlDataSource" />
<property name="persistenceXmlLocation" value="classpath:META-INF/persistence.xml" />
</bean>
<!-- Spring Data -->
<jpa:repositories base-package="com.bot.gnweb.repository"
entity-manager-factory-ref="entityManagerFactory"
transaction-manager-ref="transactionManager" />
<bean id="auditorBean" class="com.bot.gnweb.model.AuditingAware" />
<jpa:auditing auditor-aware-ref="auditorBean" />

How to use 2 or more databases with spring (xml configuration)

I'm new in spring and trying to switch between 2 different DBs. I've made these changes in spring configuration xml file:
<bean id="placeholderConfig"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:config/db-config.properties" />
</bean>
<!-- MS Sql DB -->
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${db.driver}" />
<property name="url" value="${db.url}" />
<property name="username" value="${db.username}" />
<property name="password" value="${db.password}" />
</bean>
<!-- end -->
<!-- MySql DB -->
<bean id="dataSourceMySql"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${db.driver1}" />
<property name="url" value="${db.url1}" />
<property name="username" value="${db.username1}" />
<property name="password" value="${db.password1}" />
</bean>
<!-- end -->
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="packagesToScan" value="com.epam.model" />
<property name="dataSource" ref="dataSource" />
<property name="jpaProperties">
<props>
<prop key="hibernate.show_sql">false</prop>
<prop key="hibernate.hbm2ddl.auto"></prop>
<prop key="hibernate.dialect"> org.hibernate.dialect.SQLServerDialect</prop>
</props>
</property>
<property name="persistenceProvider">
<bean class="org.hibernate.jpa.HibernatePersistenceProvider" />
</property>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
</bean>
<bean id="entityManagerFactoryMySql"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="packagesToScan" value="com.epam.model" />
<property name="dataSource" ref="dataSourceMySql" />
<property name="jpaProperties">
<props>
<prop key="hibernate.show_sql">false</prop>
<prop key="hibernate.hbm2ddl.auto"></prop>
<prop key="hibernate.dialect"> org.hibernate.dialect.MySQLDialect</prop>
</props>
</property>
<property name="persistenceProvider">
<bean class="org.hibernate.jpa.HibernatePersistenceProvider" />
</property>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<bean id="transactionManagerMySql" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactoryMySql" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<tx:annotation-driven transaction-manager="transactionManagerMySql" />
<jpa:repositories base-package="com.epam.repository" />
</beans>
what I need to add in repository or service to specify which db I want to work.

You can load the second data source using #Resource annotation

Thanks for responce. I'm just added 2nd db specific key/values in properties file and depending on the db type, just uncommented appropriate ones.

Hibernate auto update table in Spring MVC

I have the following configuration in my Spring MVC project:
<bean id="datasource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="url" value="jdbc:mysql://localhost:3306/tracDB"/>
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="username" value="root"/>
<property name="password" value=""/>
</bean>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="spring-practice"/>
<property name="packagesToScan" value="com.paweljarosz.trac.data"/>
<property name="dataSource" ref="datasource"/>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="showSql" value="true"/>
<property name="database" value="MYSQL"/>
</bean>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
I would like Hibernate to automatically create and update data model based on entities. Does anyone know how to fix this configutation to achieve it?

I suppose you need something like this
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="database" value="MYSQL"/>
<property name="showSql" value="true"/>
<property name="generateDdl" value="true"/>
</bean>
</property>
Alternatively, most of these things can also be set in the JPA properties directly. Spring lets you do that through the jpaVendorProperties as well. See Hibernate Configuration Properties for reference.
For example:
<property name="jpaProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.use_sql_comments">true</prop>
<prop key="hibernate.format_sql">true</prop>
<prop key="hibernate.generate_statistics">true</prop>
<prop key="hibernate.jdbc.fetch_size">100</prop>
<!-- This one below is what you're looking for-->
<prop key="hibernate.hbm2ddl.auto">create</prop>
</props>
</property>

how to define routingdatasource for two mysql and oracle?

I want to define a routingdatasource for two different databases: mysql and oracle
I've defined the following config.xml
<bean id="dataSourceTarget" class="com.test.common.RoutingDataSource">
<property name="targetDataSources">
<map key-type="com.test.common.DataSourceType">
<entry key="MY_SQL" value-ref="mySqlDataSource"/>
<entry key="ORACLE" value-ref="oracleDataSource"/>
</map>
</property>
<property name="defaultTargetDataSource" ref="mySqlDataSource"/>
</bean>
<bean id="mySqlDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="driverClass" value="${jdbc.driver.classname}" />
<property name="jdbcUrl" value="${mysql.url}" />
<property name="user" value="${mysql.username}" />
<property name="password" value="${mysql.password}" />
</bean>
<bean id="oracleDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="driverClass" value="oracle.jdbc.driver.OracleDriver" />
<property name="jdbcUrl" value="${oracle.url}" />
<property name="user" value="${oracle.user}" />
<property name="password" value="${oracle.passw}" />
</bean>
and now I can define session factory and transaction manager
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.format_sql">true</prop>
<prop key="hibernate.use_sql_comments">true</prop>
</props>
</property>
</bean>
But this is doesn't work. I'm getting the
Caused by: java.lang.UnsupportedOperationException: The user must supply a JDBC connection
And in addition I must define the dialect for session.
But how can I define it depending on the datasourse it is working on?