[ http://thecla.homeftp.net:8380/jira/browse/SPRING-36?page=history ]
Chad Brandon closed SPRING-36:
------------------------------
Resolution: Fixed
Fix Version: 3.0RC1
> Give access to Spring ApplicationContext singleton
> --------------------------------------------------
>
> Key: SPRING-36
> URL: http://thecla.homeftp.net:8380/jira/browse/SPRING-36
> Project: Spring Cartridge
> Type: Improvement
> Reporter: Johnny Macchione
> Assignee: Chad Brandon
> Priority: Minor
> Fix For: 3.0RC1
>
>
> When using EJBs, the following files are generated:
> - applicationContext.xml
> - beanRefFactory.xml
> - mypackage.ServiceLocator
> The latter references the applicationContext.xml file and is used by the
> ContextSingletonBeanFactoryLocator to locate one or more XML application
> context definition files, instantiate one or more ApplicationContexts from
> these files and make these accessible throughout the application.
> The ContextSingletonBeanFactoryLocator is used within EJB implementations to
> locate POJO service beans to which the business logic is delegated.
> The web tier uses the ServiceLocator to transparently lookup the session EJB
> instances from the JNDI context.
> Everything is fine in this case.
> When not using EJBs at all, only the following files are generated:
> - applicationContext.xml
> - mypackage.ServiceLocator
> The ServiceLocator is now also responsible for locating an XML application
> context definition file and instantiate an ApplicationContext.
> But in order to keep the interface unchanged with regards to the
> ServiceLocator generated when using EJBs, the ApplicationContext getContext()
> method is kept protected.
> This makes it impossible to access the ApplicationContext instance from
> outside mypackage, e.g. to use it as parent context for a new application
> context.
> I suggest leveraging Spring's ContextSingletonBeanFactoryLocator in the same
> way it is used with EJBs and implement the ServiceLocator to use the
> ContextSingletonBeanFactoryLocator singleton like this:
> beanRefFactory.xml:
> <beans>
> <bean id="mypackage.applicationContext"
>
> class="org.springframework.context.support.ClassPathXmlApplicationContext">
> <constructor-arg>
> <list>
> <value>mypackage/applicationContext.xml</value>
> </list>
> </constructor-arg>
> </bean>
> </beans>
> ServiceLocator:
> private BeanFactoryReference beanFactoryRef;
> synchronized ApplicationContext getContext() {
> if (beanFactoryRef == null)
> {
> BeanFactoryLocator beanFactoryLocator =
>
> ContextSingletonBeanFactoryLocator.getInstance("beanRefFactory.xml");
> beanFactoryRef = beanFactoryLocator.useBeanFactory(
> "mypackage.applicationContext");
> }
> return (ApplicationContext) beanFactoryRef.getFactory();
> }
> public synchronized void dispose() {
> if (beanFactoryRef != null) {
> beanFactoryRef.release();
> }
> }
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