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POMultiple database with Spring+Hibernate+JPA
 

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  1. POMultiple database with Spring+Hibernate+JPA
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    <p>I'm trying to configure Spring+Hibernate+JPA for work with two databases (MySQL and MSSQL).</p> <p>My datasource-context.xml: </p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.5.xsd" xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util"&gt; &lt;!-- Data Source config --&gt; &lt;bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" p:driverClassName="${local.jdbc.driver}" p:url="${local.jdbc.url}" p:username="${local.jdbc.username}" p:password="${local.jdbc.password}"&gt; &lt;/bean&gt; &lt;bean id="dataSourceRemote" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" p:driverClassName="${remote.jdbc.driver}" p:url="${remote.jdbc.url}" p:username="${remote.jdbc.username}" p:password="${remote.jdbc.password}" /&gt; &lt;bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager" p:entity-manager-factory-ref="entityManagerFactory" /&gt; &lt;!-- JPA config --&gt; &lt;tx:annotation-driven transaction-manager="transactionManager" /&gt; &lt;bean id="persistenceUnitManager" class="org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager"&gt; &lt;property name="persistenceXmlLocations"&gt; &lt;list value-type="java.lang.String"&gt; &lt;value&gt;classpath*:config/persistence.local.xml&lt;/value&gt; &lt;value&gt;classpath*:config/persistence.remote.xml&lt;/value&gt; &lt;/list&gt; &lt;/property&gt; &lt;property name="dataSources"&gt; &lt;map&gt; &lt;entry key="localDataSource" value-ref="dataSource" /&gt; &lt;entry key="remoteDataSource" value-ref="dataSourceRemote" /&gt; &lt;/map&gt; &lt;/property&gt; &lt;property name="defaultDataSource" ref="dataSource" /&gt; &lt;/bean&gt; &lt;bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"&gt; &lt;property name="jpaVendorAdapter"&gt; &lt;bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" p:showSql="true" p:generateDdl="true"&gt; &lt;/bean&gt; &lt;/property&gt; &lt;property name="persistenceUnitManager" ref="persistenceUnitManager" /&gt; &lt;property name="persistenceUnitName" value="localjpa"/&gt; &lt;/bean&gt; &lt;bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" /&gt; &lt;/beans&gt; </code></pre> <p>Each persistence.xml contains one unit, like this:</p> <pre><code>&lt;persistence-unit name="remote" transaction-type="RESOURCE_LOCAL"&gt; &lt;properties&gt; &lt;property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.DefaultNamingStrategy" /&gt; &lt;property name="hibernate.dialect" value="${remote.hibernate.dialect}" /&gt; &lt;property name="hibernate.hbm2ddl.auto" value="${remote.hibernate.hbm2ddl.auto}" /&gt; &lt;/properties&gt; &lt;/persistence-unit&gt; </code></pre> <p>PersistenceUnitManager cause following exception:</p> <blockquote> <p>Cannot resolve reference to bean 'persistenceUnitManager' while setting bean property 'persistenceUnitManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'persistenceUnitManager' defined in class path resource [config/datasource-context.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type [java.util.ArrayList] to required type [java.lang.String] for property 'persistenceXmlLocation'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [java.util.ArrayList] to required type [java.lang.String] for property 'persistenceXmlLocation': no matching editors or conversion strategy found</p> </blockquote> <p>If left only one persistence.xml without list, every works fine but I need 2 units...</p> <p>I also try to find alternative solution for work with two databases in Spring+Hibernate context, so I would appreciate any solution.</p> <p>New error after changing to <code>persistenceXmlLocations</code>:</p> <blockquote> <p>No single default persistence unit defined in {classpath:config/persistence.local.xml, classpath:config/persistence.remote.xml}</p> </blockquote> <p>Update: </p> <p>I add persistenceUnitName, it works, but only with one unit, still need help.</p> <p>Update:</p> <p>I changed config files: datasource-context.xml</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.5.xsd" xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util"&gt; &lt;bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" p:driverClassName="${local.jdbc.driver}" p:url="${local.jdbc.url}" p:username="${local.jdbc.username}" p:password="${local.jdbc.password}"&gt; &lt;/bean&gt; &lt;bean id="dataSourceRemote" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" p:driverClassName="${remote.jdbc.driver}" p:url="${remote.jdbc.url}" p:username="${remote.jdbc.username}" p:password="${remote.jdbc.password}"&gt; &lt;/bean&gt; &lt;bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"&gt; &lt;property name="defaultPersistenceUnitName" value="pu1" /&gt; &lt;/bean&gt; &lt;bean id="persistenceUnitManager" class="org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager"&gt; &lt;property name="persistenceXmlLocation" value="${persistence.xml.location}" /&gt; &lt;property name="defaultDataSource" ref="dataSource" /&gt; &lt;!-- problem --&gt; &lt;property name="dataSources"&gt; &lt;map&gt; &lt;entry key="local" value-ref="dataSource" /&gt; &lt;entry key="remote" value-ref="dataSourceRemote" /&gt; &lt;/map&gt; &lt;/property&gt; &lt;/bean&gt; &lt;bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"&gt; &lt;property name="jpaVendorAdapter"&gt; &lt;bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" p:showSql="true" p:generateDdl="true"&gt; &lt;/bean&gt; &lt;/property&gt; &lt;property name="persistenceUnitManager" ref="persistenceUnitManager" /&gt; &lt;property name="persistenceUnitName" value="pu1" /&gt; &lt;property name="dataSource" ref="dataSource" /&gt; &lt;/bean&gt; &lt;bean id="entityManagerFactoryRemote" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"&gt; &lt;property name="jpaVendorAdapter"&gt; &lt;bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" p:showSql="true" p:generateDdl="true"&gt; &lt;/bean&gt; &lt;/property&gt; &lt;property name="persistenceUnitManager" ref="persistenceUnitManager" /&gt; &lt;property name="persistenceUnitName" value="pu2" /&gt; &lt;property name="dataSource" ref="dataSourceRemote" /&gt; &lt;/bean&gt; &lt;tx:annotation-driven /&gt; &lt;bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager" p:entity-manager-factory-ref="entityManagerFactory" /&gt; &lt;bean id="transactionManagerRemote" class="org.springframework.orm.jpa.JpaTransactionManager" p:entity-manager-factory-ref="entityManagerFactoryRemote" /&gt; &lt;/beans&gt; </code></pre> <p>persistence.xml</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0"&gt; &lt;persistence-unit name="pu1" transaction-type="RESOURCE_LOCAL"&gt; &lt;properties&gt; &lt;property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.DefaultNamingStrategy" /&gt; &lt;property name="hibernate.dialect" value="${local.hibernate.dialect}" /&gt; &lt;property name="hibernate.hbm2ddl.auto" value="${local.hibernate.hbm2ddl.auto}" /&gt; &lt;/properties&gt; &lt;/persistence-unit&gt; &lt;persistence-unit name="pu2" transaction-type="RESOURCE_LOCAL"&gt; &lt;properties&gt; &lt;property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.DefaultNamingStrategy" /&gt; &lt;property name="hibernate.dialect" value="${remote.hibernate.dialect}" /&gt; &lt;property name="hibernate.hbm2ddl.auto" value="${remote.hibernate.hbm2ddl.auto}" /&gt; &lt;/properties&gt; &lt;/persistence-unit&gt; &lt;/persistence&gt; </code></pre> <p>Now it builds two entityManagerFactory, but both are for Microsoft SQL Server</p> <pre><code>[main] INFO org.hibernate.ejb.Ejb3Configuration - Processing PersistenceUnitInfo [ name: pu1 ...] [main] INFO org.hibernate.cfg.SettingsFactory - RDBMS: Microsoft SQL Server [main] INFO org.hibernate.ejb.Ejb3Configuration - Processing PersistenceUnitInfo [ name: pu2 ...] [main] INFO org.hibernate.cfg.SettingsFactory - RDBMS: Microsoft SQL Server (but must MySQL) </code></pre> <p>I suggest, that use only dataSource, dataSourceRemote (no substitution) is not worked. That's my last problem.</p>
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