应该在哪里指定c3p0属性？ [英] where should c3p0 properties specified?

问题描述

我正在使用spring / hibernate集成应用程序。我已经配置了c3p0连接池。我正在使用c3p0组合数据源。我应该在哪里指定组合数据源属性？

I am using spring/hibernate integrated application. I have configured c3p0 connection pooling. I am using c3p0 combopooled datasource. Where should I specify combopooled datasource properties?

在本节中？

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="mappingLocations" value="classpath:hibernate-mapping.xml" />
        <property name="hibernateProperties">
            <props>
                **//Here do I need to specify combopooled datasource properties?
        //like acquireIncrement
            acquireRetryAttempts
            acquireRetryDelay
            preferredTestQuery
            maxPoolSize...etc**
            </props>
        </property>
        <property name="dataSource" ref="dataSource" />
    </bean>

还是在这里？

<bean id="rootDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}" />
        <property name="jdbcUrl" value="${jdbc.url}" />
        <property name="user" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
**//Here do i need to specify combopooled datasource properties?
            //like acquireIncrement
            acquireRetryAttempts
            acquireRetryDelay
            preferredTestQuery**
            maxPoolSize...etc

</bean>

请建议我。

谢谢！

推荐答案

您可以在 c3p0.properties 文件中指定它们。只需将其放置在您的类路径的根中

You can specify them in a c3p0.properties file. Just place it in the root of your classpath

，或者放置在名为 c3p0-config.xml 的xml文件中您的类路径的根

or, in xml file named c3p0-config.xml also in the root of your classpath

，或者，如果您希望在Spring的Hibernate XML中使用它，则可以使用

or, if you want it in you spring xml for Hibernate you can use

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
      <!--<property name="lobHandler">
         <ref local="lobHandler" />
      </property>-->
      <property name="hibernateProperties">
         <props>
            <prop key="hibernate.connection.driver_class">${jdbc.drivers}</prop>
            <prop key="hibernate.connection.url">${jdbc.url}</prop>
            <prop key="hibernate.connection.username">${jdbc.username}</prop>
            <prop key="hibernate.connection.password">${jdbc.password}</prop>
            <prop key="hibernate.c3p0.min_size">5</prop>
            <prop key="hibernate.c3p0.max_size">100</prop>
            <prop key="hibernate.c3p0.timeout">1800</prop>
            <prop key="hibernate.c3p0.max_statements">50</prop>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</prop>
            <prop key="hibernate.cglib.use_reflection_optimizer">true</prop>
            <prop key="hibernate.show_sql">true</prop>
            <prop key="hibernate.format_sql">true</prop>
         </props>
      </property>

我相信如果两者都存在，则Hibernate设置会覆盖使用c3po.properties文件。但是此post 建议与c3po文档存在某些矛盾

I believe the Hibernate settings override the use of a c3po.properties file if both exist. however this post suggests some inconsistencies with the c3po docs

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