spring - 使用 Spring jdbcTemplate 时的 ConnectionPooling 配置

Question

我正在开发一个需要在大型机上调用 DB2 函数来获取 ID 的应用程序。

在我的 spring 应用程序上下文中，我已经定义了我的 jdbc 模板来查询 zOS 上的 DB2:

    <bean id="jdbcTemplateDB2"
       class="org.springframework.jdbc.core.JdbcTemplate">
         <property name="dataSource" ref="dataSourceDB2"/>
    </bean>

然后我定义数据源如下:

 <bean id="dataSourceDB2" 
    class="com.ibm.db2.jcc.DB2DataSource">
        <property name="serverName" value="hostname" />
        <property name="portNumber" value="portno"/>
        <property name="databaseName" value="dbname"/>
        <property name="driverType" value="4"/>
        <property name="user" value="userid"/>
        <property name="password" value="password"/>
 </bean>

以上工作。
但是，查看 ibm 的 db2jcc.jar 文件，我看到了一个带有连接池的数据源类 - com.ibm.db2.jcc.DB2ConnectionPoolDataSource。所以我尝试使用它而不是上面的那个 - 就像这样:

 <bean id="dataSourceDB2"
    class="com.ibm.db2.jcc.DB2ConnectionPoolDataSource">
        <property name="serverName" value="hostname" />
        <property name="portNumber" value="portno"/>
        <property name="databaseName" value="dbname"/>
        <property name="driverType" value="4"/>
        <property name="user" value="userid"/>
        <property name="password" value="password"/>
 </bean>

但是，使用 DB2ConnectionPoolDataSource 会给我以下错误。

Cannot convert value of type [com.ibm.db2.jcc.DB2ConnectionPoolDataSource] to required type [javax.sql.DataSource] for property 'dataSource': no matching editors or conversion strategy found

完整的堆栈跟踪如下

    Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'classUniqueIdDaoImpl_v2': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jdbcTemplateDB2' defined in class path resource [META-INF/spring/applicationContext-db2.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'com.ibm.db2.jcc.DB2ConnectionPoolDataSource' to required type 'javax.sql.DataSource' for property 'dataSource'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [com.ibm.db2.jcc.DB2ConnectionPoolDataSource] to required type [javax.sql.DataSource] for property 'dataSource': no matching editors or conversion strategy found
        at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:307)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:609)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:469)
        at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
        at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
        at com.slma.euclid.core.dao.MainDB2.main(MainDB2.java:18)
    Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jdbcTemplateDB2' defined in class path resource [META-INF/spring/applicationContext-db2.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'com.ibm.db2.jcc.DB2ConnectionPoolDataSource' to required type 'javax.sql.DataSource' for property 'dataSource'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [com.ibm.db2.jcc.DB2ConnectionPoolDataSource] to required type [javax.sql.DataSource] for property 'dataSource': no matching editors or conversion strategy found
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:876)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:818)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:735)
        at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.autowireResource(CommonAnnotationBeanPostProcessor.java:439)
        at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor.java:417)
        at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(CommonAnnotationBeanPostProcessor.java:559)
        at org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement.inject(InjectionMetadata.java:150)
        at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
        at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:304)
        ... 13 more
    Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'com.ibm.db2.jcc.DB2ConnectionPoolDataSource' to required type 'javax.sql.DataSource' for property 'dataSource'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [com.ibm.db2.jcc.DB2ConnectionPoolDataSource] to required type [javax.sql.DataSource] for property 'dataSource': no matching editors or conversion strategy found
        at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:485)
        at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:516)
        at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:510)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1406)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1365)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1118)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
        ... 27 more
    Caused by: java.lang.IllegalStateException: Cannot convert value of type [com.ibm.db2.jcc.DB2ConnectionPoolDataSource] to required type [javax.sql.DataSource] for property 'dataSource': no matching editors or conversion strategy found
        at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:241)
        at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:470)
        ... 33 more

我究竟做错了什么？在实例化 Spring JdbcTemplate 时使用连接池数据源的正确方法是什么？

任何帮助表示赞赏。

-SGB

Answer 1

你读过这个吗:http://forum.springsource.org/showthread.php?66142-How-to-use-javax-sql-datasource-with-a-ConnectionPoolDataSource

它说 com.ibm.db2.jcc.DB2DataSource 如果使用正确的话已经是一个连接池。