spring配置proxool数据连接池的问题,来者有分！

Question

开始的时候，我用的是dbcp的连接池
在spring的配置文件中这么配置连接池部分:<!-- 配置DataSource -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!--配置hibernate -->
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
  <prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
<property name="packagesToScan">
<list>
<value>com.model</value>
</list>
</property>
</bean>大家注意，我配置了Datasource（其中${jdbc.username}的是个属性文件，这个大家都知道吧）可是后来，我看了我们大牛老师的配置文件，他用的proxool作为连接池，这是这样配置的:<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect
</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">false</prop>
<prop key="hibernate.cglib.use_reflection_optimizer">true</prop>
<prop key="connection.provider_class">org.hibernate.connection.ProxoolConnectionProvider
</prop>
<prop key="hibernate.proxool.xml">../proxool.xml</prop>
<prop key="hibernate.proxool.pool_alias">cocacola_sqlserver</prop>
</props>
</property>
<property name="mappingLocations">
<value>classpath:/com/cocacola/domain/*.hbm.xml
</value>
</property>
</bean>大家注意， 它并没有配置dataSource，这样可以吗?
proxool.xml:<?xml version="1.0" encoding="UTF-8"?>
<something-else-entirely>
<proxool>
<alias>cocacola_mysql</alias>
<driver-url>jdbc:mysql://localhost:3306/cocacola</driver-url>
<driver-class>com.mysql.jdbc.Driver</driver-class>
<driver-properties>
<property name="user" value="root" />
<property name="password" value="d" />
</driver-properties>
<maximum-connection-count>100</maximum-connection-count>
<minimum-connection-count>10</minimum-connection-count>
<simultaneous-build-throttle>30</simultaneous-build-throttle>
<prototype-count>3</prototype-count>
<house-keeping-test-sql>select 1 from dual</house-keeping-test-sql>
</proxool>
<proxool>
<alias>cocacola_sqlserver</alias>
<driver-url>jdbc:sqlserver://localhost:1433;databasename=cocacola</driver-url>
<driver-class>com.microsoft.sqlserver.jdbc.SQLServerDriver</driver-class>
<driver-properties>
<property name="user" value="sa" />
<property name="password" value="" />
</driver-properties>
<maximum-connection-count>100</maximum-connection-count>
<minimum-connection-count>10</minimum-connection-count>
<simultaneous-build-throttle>30</simultaneous-build-throttle>
<prototype-count>3</prototype-count>
<house-keeping-test-sql>select 1</house-keeping-test-sql>
</proxool>
</something-else-entirely>

Answer 1

<?xml version="1.0" encoding="UTF-8"?><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"
     xmlns:tx="http://www.springframework.org/schema/tx"
     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd"> <bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath:jdbc.properties</value>
</property>
</bean>
 <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">   
        <property name="driverClass"
value="${jdbc.driverClassName}" />
<property name="jdbcUrl" value="${jdbc.url}" />
<property name="user" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />

 <!--连接池中保留的最小连接数。-->   
        <property name="minPoolSize">   
            <value>5</value>   
        </property>   
    
 <!--连接池中保留的最大连接数。Default: 15 -->   
        <property name="maxPoolSize">   
            <value>30</value>   
        </property>   
    
<!--初始化时获取的连接数，取值应在minPoolSize与maxPoolSize之间。Default: 3 -->   
        <property name="initialPoolSize">   
            <value>10</value>   
        </property>   
    
 <!--最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 -->   
        <property name="maxIdleTime">   
            <value>60</value>   
        </property>   
    
 <!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 -->   
        <property name="acquireIncrement">   
            <value>5</value>   
        </property>   
    
 <!--JDBC的标准参数，用以控制数据源内加载的PreparedStatements数量。但由于预缓存的statements   
  属于单个connection而不是整个连接池。所以设置这个参数需要考虑到多方面的因素。   
  如果maxStatements与maxStatementsPerConnection均为0，则缓存被关闭。Default: 0-->   
        <property name="maxStatements">   
            <value>0</value>   
        </property>   
    
 <!--每60秒检查所有连接池中的空闲连接。Default: 0 -->   
        <property name="idleConnectionTestPeriod">   
            <value>60</value>   
        </property>   
    
 <!--定义在从数据库获取新连接失败后重复尝试的次数。Default: 30 -->   
        <property name="acquireRetryAttempts">   
            <value>30</value>   
        </property>   
    
 <!--获取连接失败将会引起所有等待连接池来获取连接的线程抛出异常。但是数据源仍有效   
  保留，并在下次调用getConnection()的时候继续尝试获取连接。如果设为true，那么在尝试   
  获取连接失败后该数据源将申明已断开并永久关闭。Default: false-->   
        <property name="breakAfterAcquireFailure">   
            <value>true</value>   
        </property>   
    
 <!--因性能消耗大请只在需要的时候使用它。如果设为true那么在每个connection提交的   
  时候都将校验其有效性。建议使用idleConnectionTestPeriod或automaticTestTable   
  等方法来提升连接测试的性能。Default: false -->   
        <property name="testConnectionOnCheckout">   
            <value>false</value>   
        </property>   

</bean> <bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean" >
<property name="dataSource" ref="dataSource" />
<property name="mappingResources">
<list>
<value>com/jx/hibernate/classes/Admin.hbm.xml</value>
<value>com/jx/hibernate/classes/Sms_outbox.hbm.xml</value>
<value>com/jx/hibernate/classes/SMStemplates.hbm.xml</value>
<value>com/jx/hibernate/classes/Log.hbm.xml</value>
<value>com/jx/hibernate/classes/Competence.hbm.xml</value>
<value>com/jx/hibernate/classes/Role.hbm.xml</value>
<value>com/jx/hibernate/classes/TemplateType.hbm.xml</value>
<value>com/jx/hibernate/classes/Department.hbm.xml</value>
        <value>com/jx/hibernate/classes/Worker.hbm.xml</value>
        <value>com/jx/hibernate/classes/Branche.hbm.xml</value>
        <value>com/jx/hibernate/classes/Classes.hbm.xml</value>
        <value>com/jx/hibernate/classes/Student.hbm.xml</value>  
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>   
                <prop key="hibernate.show_sql">true</prop>   
                <prop key="hibernate.generate_statistics">true</prop>   
                <prop key="hibernate.connection.release_mode">auto</prop>   
                <prop key="hibernate.autoReconnect">true</prop> 
</props>
</property>
</bean>
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
</beans>

Answer 2

你那第二段代码是hibernate.cfg.xml文件
在spring中的sessionFactory加上
<property name="configLocation">
        <value>classpath:hibernate.cfg.xml</value>
</property>

Answer 3

问的是proxool。。回答的是c3p0居然也能有分太强大了。。