我需要为DAO配置xml文件。所以在我的xml文件中,我声明了两个entityManager Factory,并且我想将其中的一个设置为默认持久性单元。我已宣布部分如下面我dao.xml在哪种情况下,我需要提供spring class name作为bean id值?
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor">
property name="defaultPersistenceUnitName" value="pumps-jpa"/>
</bean>
但是,它并没有不适合我,它没有采取默认的持久性单元。我得到的错误是这样
类型没有唯一的bean定义:预计一个bean,但发现2:
很多搜索后,我发现他们所提到的bean ID一个代码片段弹簧类的名称即org.springframework.context.annotation.internalPersistenceAnnotationProcessor,如下图所示
<bean id="org.springframework.context.annotation.internalPersistenceAnnotationProcessor"
class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor">
property name="defaultPersistenceUnitName" value="pumps-jpa"/>
</bean>
所以提这个bean ID之后,它正在采取默认PERSI单位名称。我想知道,为什么我需要提到spring class(org.springframework.context.annotation.internalPersistenceAnnotationProcessor)作为bean id?这是一种黑客还是什么?下面
<tx:annotation-driven transaction-manager="transactionManager"/>
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="file:${catalina.base}/conf/pumps-dbconfig.properties"/>
<property name="ignoreUnresolvablePlaceholders" value="true"/>
</bean>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass">
<value>${jdbc.driver}</value>
</property>
<property name="jdbcUrl">
<value>${jdbc.url}</value>
</property>
<property name="user">
<value>${jdbc.user}</value>
</property>
<property name="password">
<value>${jdbc.password}</value>
</property>
<property name="initialPoolSize"><value>10</value></property>
<property name="minPoolSize"><value>10</value></property>
<property name="maxPoolSize"><value>${jdbc.maxConnections}</value></property>
<property name="maxIdleTimeExcessConnections"><value>600</value></property>
<!-- <property name="timeout"><value>0</value></property> --> <!-- 0 means: no timeout -->
<property name="idleConnectionTestPeriod"><value>60</value></property>
<property name="acquireIncrement"><value>5</value></property>
<property name="maxStatements"><value>0</value></property> <!-- 0 means: statement caching is turned off. -->
<property name="numHelperThreads"><value>3</value></property> <!-- 3 is default -->
<property name="unreturnedConnectionTimeout"><value>0</value></property>
<property name="debugUnreturnedConnectionStackTraces"><value>true</value></property>
<property name="testConnectionOnCheckout"><value>true</value></property>
</bean>
<!--
Configuration for Hibernate/JPA
-->
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="pumps-jpa" />
<property name="dataSource" ref="dataSource" />
<property name="jpaDialect">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect" />
</property>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="showSql" value="true" />
<property name="generateDdl" value="false" />
<property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
</bean>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
<property name="dataSource" ref="dataSource" />
</bean>
<!-- DEFAULT PERSISTENCE UNIT DECLARATION -->
<bean id="org.springframework.context.annotation.internalPersistenceAnnotationProcessor"
class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor">
<property name="defaultPersistenceUnitName" value="pumps-jpa"/>
</bean>
<bean id="r-dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass">
<value>${r-jdbc.driver}</value>
</property>
<property name="jdbcUrl">
<value>${r-jdbc.url}</value>
</property>
<property name="user">
<value>${r-jdbc.user}</value>
</property>
<property name="password">
<value>${r-jdbc.password}</value>
</property>
<property name="initialPoolSize"><value>10</value></property>
<property name="minPoolSize"><value>10</value></property>
<property name="maxPoolSize"><value>${r-jdbc.maxConnections}</value></property>
<!-- <property name="timeout"><value>0</value></property> --> <!-- 0 means: no timeout -->
<property name="maxIdleTimeExcessConnections"><value>600</value></property>
<property name="idleConnectionTestPeriod"><value>60</value></property>
<property name="acquireIncrement"><value>5</value></property>
<property name="maxStatements"><value>0</value></property> <!-- 0 means: statement caching is turned off. -->
<property name="numHelperThreads"><value>3</value></property> <!-- 3 is default -->
<property name="acquireRetryAttempts"><value>3</value></property>
<property name="testConnectionOnCheckout"><value>true</value></property>
</bean>
<!--
Configuration for Hibernate/JPA
-->
<bean id="r-entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="pumps-jpa" />
<property name="dataSource" ref="r-dataSource" />
<property name="jpaDialect">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect" />
</property>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="showSql" value="true" />
<property name="generateDdl" value="false" />
<property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
</bean>
</property>
</bean>
<bean id="BaseDataConnection" class="com.myntra.commons.dao.impl.BaseDataConnection">
<property name="roEntityManagerFactory" ref="r-entityManagerFactory" />
</bean>
发布整个配置xml – user2953113