Re: [Springframework-developer] Backward compatibility issue

[Colin S. <col...@ex...>]

This is not really a backwards incompatibility issue, but a config 
issue. The user was never setting the target in the proxy template 
(fine, since it's a template), but was not ensuring it was either 
lazy-load=true or abstract=true to stop it from being instantiated. So 
when Spring tried to pre-instantiate the template like any other 
singleton bean, the bean threw an exception as the target was not 
there.   What I don't understand though is why the user never had an 
issue with this in 1.1.1. It should have behaved exactly the same...


Alef Arendsen wrote:

> A user on the forum 
> (http://forum.springframework.org/viewtopic.php?t=2034&start=0&postdays=0&postorder=asc&highlight 
> <http://forum.springframework.org/viewtopic.php?t=2034&start=0&postdays=0&postorder=asc&highlight>=)  
> noticed a backward compatibility issue. I'm posting it here as well 
> and have already replied on the forum.
>
> It might be wise to include a known-poblems section on the website 
> somewhere. They are minor issues, but still I think it's good to let 
> people know if there is any issues.
>
> regards,
>
> Alef
>
>  
>
> ===========
>
> I had a txProxyTemplate bean defined in my applicationContext 
> configuration without the abstract="true" attribute and things ran 
> fine with Spring 1.1.1. I upgraded to Spring 1.1.2 and get an 
> IllegalArgumentException stating that the template bean *must* have 
> the abstract="true" attribute if it does not declare a 'target' property.
>
> I went ahead and added it and it was not a big deal. I'm not saying 
> that the IllegalArgumentException thrown under this circumstance is 
> bad, but given the prior behavior, it would have been nicer if it 
> simply logged a warning since the new behavior does break backward 
> compatibility.
>
>
> Sanjiv
>
> --------------------------------------------
>
>
> org.springframework.beans.factory.BeanCreationException: Error 
> creating bean with name 'txProxyTemplate' defined in ServletContext 
> resource [/WEB-INF/applicationContext.xml]: Initialization of bean 
> failed; nested exception is java.lang.IllegalArgumentException: 
> 'target' is required
> java.lang.IllegalArgumentException: 'target' is required
> at 
> org.springframework.transaction.interceptor.TransactionProxyFactoryBean.afterPropertiesSet(TransactionProxyFactoryBean.java:194) 
>
> at 
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:990) 
>
> at 
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:275) 
>
> at 
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:193) 
>
> at 
> org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:240) 
>
> at 
> org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:163) 
>
> at 
> org.springframework.beans.factory.support.AbstractBeanFactory.getType(AbstractBeanFactory.java:345) 
>
> at 
> org.springframework.beans.factory.support.DefaultListableBeanFactory.isBeanTypeMatch(DefaultListableBeanFactory.java:193) 
>
> at 
> org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:157) 
>
> at 
> org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:526) 
>
> at 
> net.sf.acegisecurity.util.FilterToBeanProxy.doInit(FilterToBeanProxy.java:170) 
>
> at 
> net.sf.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:102
>