使用Spring在Hibernate中配置内置的c3p0池

Question

我了解到要在hibernate中配置c3p0池,我们可以在hibernate.cfg.xml中编写配置如下:

<property name="hibernate.c3p0.min_size">2</property>
    <property name="hibernate.c3p0.max_size">5</property>
    <property name="hibernate.c3p0.timeout">600</property>
    <property name="hibernate.c3p0.max_statements">0</property>
    <property name="hibernate.c3p0.idle_test_period">300</property>
    <property name="hibernate.c3p0.acquire_increment">1</property>

但是我使用Spring配置了Hibernate.当我尝试在下面做时,它将无法工作:

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.Driver" />
    <property name="url" value="jdbc:mysql://localhost/news_loader" />
    <property name="username" value="blah" />
    <property name="password" value="blah" /> 

    <property name="hibernate.c3p0.min_size" value="2" />
    <property name="hibernate.c3p0.max_size" value="5" />
    <property name="hibernate.c3p0.timeout" value="600" />
    <property name="hibernate.c3p0.max_statements" value="0" />
    <property name="hibernate.c3p0.idle_test_period" value="300"/>
    <property name="hibernate.c3p0.acquire_increment" value="1" />
</bean>

我已经阅读过使用可以使用Spring配置的独立c3p0池,但有没有办法可以使用Spring在Hibernate中配置内置的c3p0池？

启发我因为我是初学者.

Answer 1

以下是有关如何在数据源中配置c3p0的示例配置(来自我们的应用程序):

<bean id="dataSourceGlobal" class="com.mchange.v2.c3p0.ComboPooledDataSource"
          destroy-method="close">
        <property name="driverClass" value="${driver}" />
        <property name="jdbcUrl" value="${server}" />
        <property name="user" value="${user}" />
        <property name="password" value="${passw}" /> 

        <!-- these are C3P0 properties -->
        <property name="acquireIncrement" value="${acquireIncrement}" />
        <property name="minPoolSize" value="${minPoolSize}" />
        <property name="maxPoolSize" value="${maxPoolSize}" />
        <property name="maxIdleTime" value="${maxIdleTime}" />
</bean>

我们使用外部属性文件来配置一些参数,但它们也可以直接在Spring中配置.

如果你想让hibernate处理池,那么你需要配置Session属性:

<bean id="sessionFactory" class="org.springframework.orm.hibernate.LocalSessionFactoryBean">
    <!--suppress InjectionValueTypeInspection -->
    <property name="mappingResources" ref="hibernateMappingList" />
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">net.sf.hibernate.dialect.Oracle9Dialect</prop>
            <prop key="transaction.factory_class">
                net.sf.hibernate.transaction.JDBCTransactionFactory
            </prop>
            <prop key="hibernate.transaction.factory_class">
                net.sf.hibernate.transaction.JDBCTransactionFactory
            </prop>
            <prop key="hibernate.show_sql">false</prop>
            <prop key="hibernate.cglib.use_reflection_optimizer">false</prop>
            <prop key="hibernate.jdbc.batch_size">0</prop>

            <prop name="hibernate.c3p0.min_size" value="2" />
            <prop name="hibernate.c3p0.max_size" value="5" />
            <prop name="hibernate.c3p0.timeout" value="600" />
            <prop name="hibernate.c3p0.max_statements" value="0" />
            <prop name="hibernate.c3p0.idle_test_period" value="300"/>
            <prop name="hibernate.c3p0.acquire_increment" value="1" />
      </props>
    </property>
</bean>

您必须使用以下方法之一:在数据源池中或在休眠会话中使用池.永远不要同时使用它们,因为它浪费资源.