Re: [Springframework-developer] AutoProxyCreator problem

[Rajeev K. <Ra...@cu...>]

Dmitry,

Nice!  A clever workaround.  Thanks for your suggestion.

regards,

Rajeev
----- Original Message -----
From: "Kopylenko, Dmitry" <dko...@su...>
To: "'Rajeev Kaul '" <Ra...@cu...>;
<spr...@li...>
Sent: Wednesday, November 19, 2003 5:16 PM
Subject: RE: [Springframework-developer] AutoProxyCreator problem


> As to your first problem, you would need to create a new instance of the
> BeanFactory
> Consider the following piece of code (taken from
> EnterpriseServices.createInvokerInterceptor() ):
>
> // Infinite cycle: tries to create the bean if we don't use a different
> factory
> ListableBeanFactoryImpl bf2 = new ListableBeanFactoryImpl();
> bf2.registerBeanDefinition(beanName, definition);
> cpii.setBeanFactory(bf2);
>
> ...where cpii is the reference of type AbstractPoolingInvokerInterceptor
> which extends PrototypeInvokerInterceptor
>
> I guess this is what you need.
>
> Dmitriy.
>
> -----Original Message-----
> From: Rajeev Kaul
> To: spr...@li...
> Sent: 11/19/2003 7:33 PM
> Subject: Re: [Springframework-developer] AutoProxyCreator problem
>
> I am thinking of a solution for condensing the verbose configuration
> (shown below) for prototype business logic beans I am using in my
> application.  A shared controller instance (singelton) creates the
> business logic bean.  However the business logic bean must be
> instantiated per each thread that runs through the shared controller.  I
> have been using the configuration shown below:
>
>
> <bean id="prototypeBean" class="xyz.BusLogicBean" singleton="false">
>
> <property name="count"><value>10</value></property>
>
> </bean>
>
> <bean id="prototypeInvokerInterceptor"
> class="org.springframework.aop.interceptor.PrototypeInvokerInterceptor">
>
>
> <property name="targetBeanName"><value>prototypeBean</value></property>
>
> </bean>
>
> <bean id="prototype"
> class="org.springframework.aop.framework.ProxyFactoryBean">
>
> <property
> name="interceptorNames"><value>prototypeInvokerInterceptor</value></prop
> erty>
>
> </bean>
>
>
>
> As you can see this is very verbose, especially if you have a lot of
> these business logic beans in your application.  I tried using a derived
> version of BeanNameAutoProxyCreator to solve this, but ran into
> problems. I would like to replace this configuration with something
> shown below:
>
>
>
> <bean id="prototypeBean" class="xyz.BusLogicBean" singleton="false"
> proxy="prototype">
>
> <property name="count"><value>10</value></property>
>
> </bean>
>
> This would involve adding a "PROXY" attribute which would specify the
> type of proxy interceptor desired for the bean.  For example,
> "prototype" would mean ProxyFactoryBean with
> PrototypeInvokerInterceptor, "default" would mean ProxyFactoryBean with
> InvokerInterceptor, etc.  In loadBeanDefinition() method of the
> XmlBeanFactory class, the supporting proxy classes (ProxyFactoryBean
> and PrototypeInvokerInterceptor) could be automatically generated and
> registered.
>
> Any suggestions, comments, ...?
>
>
>
> Rajeev
>
> ----- Original Message -----
> From: Rajeev Kaul <mailto:Ra...@cu...>
> To: spr...@li...
> <mailto:spr...@li...>
> Sent: Tuesday, November 18, 2003 1:29 PM
> Subject: [Springframework-developer] AutoProxyCreator problem
>
>
> I have been trying to use BeanNameAutoProxyCreator class (I noticed
> there are no test cases for it) to create proxies for "prototype"
> business objects. I extended the BeanNameAutoProxyCreator class to use
> the PrototypeInvokerInterceptor in the "createInvokerInterceptor()"
> method.  However, this results in an infinite loop, as the
> PrototypeInvokerInterceptor calls the beanFactory getBean() method which
> in turn triggers the beanPostProcessor and the cycle repeats endlessly.
>
> Any suggestions on getting around this problem?
>
> It would have been better, if the BeanNameAutoProxyCreator class was
> designed to take invokerInterceptor as a property, which could be
> specified in the configuration, instead of having to subclass it to use
> other invokerInterceptor(s).
>
> Rajeev Kaul
>
>
>
>
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