Lookup jndi资源WebSphere 8.5，Spring 3.1.3，Hibernate 4.1.10 EJB 3 [英] Lookup jndi resources WebSphere 8.5, Spring 3.1.3, Hibernate 4.1.10 EJB 3

问题描述

在我的应用程序中，我需要查找jndi资源以进行数据库连接。

我有一个包含我的远程和无状态ejb的EJB项目的EAR： ABean.jar

阅读使用Spring和Hibernate与WebSphere Application Server 我在EAR项目的 application.xml 中定义了
：

 < module> 
< ejb> ABean.jar< / ejb> 
 
< / module> 
 
< resource-ref> 
< res-ref-name> jdbc / b< / res-ref-name> 
< res-type> javax.sql.DataSource< / res-type> 
< res-auth>容器< / res-auth> 
< res-sharing-scope>可共享< / res-sharing-scope> 
< / resource-ref> 
  

在我的春天的环境中：

 < jee：jndi-lookup 
 id =aDataSource
 jndi-name =jdbc / b
 cache =true
预期型= javax.sql.DataSource中/> 
 
< bean id =entityManagerFactoryclass =org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean> 
< property name =persistenceXmlLocationvalue =META-INF / persistence.xml/> 
< property name =dataSourceref =aDataSource/> 
< property name =persistenceUnitNamevalue =APU/> 
< property name =jpaProperties> 
<道具> 
< prop key =hibernate.dialect> org.hibernate.dialect.DB2390Dialect< / prop> 
< prop key =hibernate.show_sql> true< / prop> 
< / props> 
< / property> 
< property name =jpaDialect> 
< bean class =org.springframework.orm.jpa.vendor.HibernateJpaDialect/> 
< / property> 
< / bean> 
  

现在，如果我通过WebSphere控制台安装应用程序，它要求我将jndi资源分配给 jdbc / b （这是可以的），但是如果我尝试调用一个ejb，一个 NameNotFoundException 被抛出，因为 jdbc / b 未找到！

阅读更好的上一个链接我看到：

对于EJB JAR文件，应在需要访问数据源的每个EJB中声明相同的资源引用。

所以我试图将资源引用定义到我的 ejb-jar.xml中

 <企业豆> 
< session> 
< ejb-name> TestServiceBean< / ejb-name> 
< ejb-class> it.test.TestServiceBean< / ejb-class> 
< session-type> Stateless< / session-type> 
< transaction-type> Container< / transaction-type> 
< resource-ref> 
< res-ref-name> jdbc / b< / res-ref-name> 
< res-type> javax.sql.DataSource< / res-type> 
< / resource-ref> 
< / session> 
< / enterprise-beans> 
  

我尝试再次安装（我也将jndi资源分配给$ code> jdbc / b] / ejb的调用成功运行，但是如果我有n ejb，那么需要将n次相同的jndi资源分配给jdbc / b的n ejb resource-ref？ / p>

我的配置有什么问题？所有ejb都不能同 resource-ref ？你有完整的例子吗？

解决方案

根据EE 6规范，在 application.xml中声明的引用必须位于 java：app （或 java：global ）命名空间中，而建议他们在 env 子上下文中，所以：

  ; RES-REF-名称>的java：应用/ env的/ JDBC / b将/ RES-REF-名称> 
  

这将允许资源对应用程序中的所有组件都可见。或者，您可以在ejb-jar.xml中的 java：module 上下文中或通过注释声明一个引用。

In my application I need to lookup jndi resources for database connection.

I have an EAR which contain my EJB project with remote and stateless ejb: ABean.jar

Reading Using Spring and Hibernate with WebSphere Application Server I defined in the application.xml of EAR project:

<module>
    <ejb>ABean.jar</ejb>

</module>

<resource-ref>
    <res-ref-name>jdbc/b</res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
    <res-auth>Container</res-auth>
    <res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>

In my spring context:

<jee:jndi-lookup
    id="aDataSource" 
    jndi-name="jdbc/b" 
    cache="true" 
    expected-type="javax.sql.DataSource"/>

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="persistenceXmlLocation" value="META-INF/persistence.xml"/>
    <property name="dataSource" ref="aDataSource" />
    <property name="persistenceUnitName" value="APU"/>
    <property name="jpaProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.DB2390Dialect</prop>
            <prop key="hibernate.show_sql">true</prop>
        </props>
    </property>
    <property name="jpaDialect">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect" />
    </property> 
</bean>

Now, if I install application by WebSphere console, it ask to me to assign the jndi resource to jdbc/b (and it is ok), but if I try to call an ejb, a NameNotFoundException is throw because jdbc/b is not found!

Reading better the previous link i see:

For EJB JAR files, the same resource-ref should be declared in each EJB that needs to access the data source.

so I try to define resource references into my ejb-jar.xml

<enterprise-beans>
<session>
   <ejb-name>TestServiceBean</ejb-name>
   <ejb-class>it.test.TestServiceBean</ejb-class>
   <session-type>Stateless</session-type>
   <transaction-type>Container</transaction-type>
   <resource-ref>
        <res-ref-name>jdbc/b</res-ref-name>         
        <res-type>javax.sql.DataSource</res-type>   
   </resource-ref>
 </session>
 </enterprise-beans>

I try to install again (I also assign the jndi resource to jdbc/b) and the call to the ejb run successfully, but if I have n ejb, do I need to assign n-times the same jndi resource to the n ejb resource-ref for jdbc/b?

What is wrong with my configuration? Isn't it possible "point" to the same resource-ref from all ejb? Do you have a complete example?

解决方案

Per the EE 6 spec, references declared in application.xml must be in the java:app (or java:global) namespaces, and it is recommend that they be in the env subcontext, so:

<res-ref-name>java:app/env/jdbc/b</res-ref-name>

This will allow the resource to be visible to all components in the application. Alternatively, you can declare a reference in the java:module context in ejb-jar.xml or via annotation.

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