When entityManagerFactory is not named "entityManagerFactory"

My webapp contains many entityManagerFactories (DBs). Each has its own unique name, such as entityManagerFactoryApp, entityManagerFactoryBusiness, entityManagerFactoryForum, etc.

In the webapp I have to add OpenEntityManagerInViewFilter to achieve "Open Session in View" pattern.

<filter>
    <filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
    <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

W开发者_如何学Chen running Spring throws the following error:

NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' is defined

But none of my entityManagerFactories is named entityManagerFactory.

I looked at the code of OpenEntityManagerInViewFilter and found setEntityManagerFactoryBeanName() method. How can I set it's value in web.xml?

Moreover, since I have multiple EMFs, should I define multiple OpenEntityManagerInViewFilters in web.xml?

Environments : Spring 3.0.2 , Hibernate 3.5.1.Final , Resin 4.0.7 , JPA2 (hibernate-jpa-2.0-api)

OpenEntityManagerInViewFilter is a subclass of GenericFilterBean, which automatically translates filter init parameters into bean properties. So to set the entityManagerFactoryBeanName property on the filter, just use an init-param:

<filter>
   <filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
   <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
   <init-param>
      <param-name>entityManagerFactoryBeanName</param-name>      
      <param-value>entityManagerFactoryApp</param-value>       
   </init-param>
</filter>

You'll need one of these per EntitymanagerFactory, with the entityManagerFactoryBeanName set accordingly.