I am developing an application that needs to call a DB2 function on the mainframe to get an id.
In my spring application context, I have defined my jdbc template to query DB2 on zOS thusly:
<bean id="jdbcTemplateDB2"
class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSourceDB2"/>
</bean>
I then define the datasource as follows:
<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>
The above works.
However, looking inside the ibm’s db2jcc.jar files, I see a class for datasource WITH connection pooling – com.ibm.db2.jcc.DB2ConnectionPoolDataSource. So I tried to use that instead of the one above – like so :
<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>
However, using the DB2ConnectionPoolDataSource gives me the following error.
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
The complete stackTrace is below
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
What am I doing wrong? What is the correct way to use a connection pooled datasource while instantiating the Spring JdbcTemplate?
Any help is appreciated.
-SGB
Have you read this one: http://forum.springsource.org/showthread.php?66142-How-to-use-javax-sql-datasource-with-a-ConnectionPoolDataSource
It says com.ibm.db2.jcc.DB2DataSource is already a connection pool if used correctly.