Spring AOP - 生成代理时出错
我正在使用 Spring AOP 的周围建议来捕获事务的处理时间。我在应用程序启动期间收到以下错误
error creating bean "coreMessageResourceAccesor"
Could not generate CGLIB subclass of class
[class org.springframework.context.support.MessageSourceAccessor]:
Common causes of this problem include using a final class or a non-visible class;
nested exception is java.lang.IllegalArgumentException:
Superclass has no null constructors but no arguments were given
我在 线程。但我无法更改 coreMessageResourceAccesor bean 以使用基于 setter 的注入，因为它使用 spring 类 &该类没有 arg 构造函数
下面是 bean 的配置，
<bean id="coreMessageSourceAccessor"
class="org.springframework.context.support.MessageSourceAccessor" >
<constructor-arg type="org.springframework.context.MessageSource"
ref="coreMessageSource" />
</bean>
如果有人可以提供帮助，我将非常感激。感谢您抽出时间。
I'm using spring AOP's around advice to capture processing time of a transaction. I'm getting the following error during application startup
error creating bean "coreMessageResourceAccesor"
Could not generate CGLIB subclass of class
[class org.springframework.context.support.MessageSourceAccessor]:
Common causes of this problem include using a final class or a non-visible class;
nested exception is java.lang.IllegalArgumentException:
Superclass has no null constructors but no arguments were given
I identified what the problem is with the help of this thread. But I cannot change coreMessageResourceAccesor bean to use setter based injection because its using a spring class & that class doesn't have no arg constructor
Below is the configuration for the bean
<bean id="coreMessageSourceAccessor"
class="org.springframework.context.support.MessageSourceAccessor" >
<constructor-arg type="org.springframework.context.MessageSource"
ref="coreMessageSource" />
</bean>
I would really appreciate if someone could help. Thanks for your time.
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评论（1）
您并不需要真正将
MessageSourceAccessor访问器配置为 bean，通常根据需要手动实例化它更容易。因此，不要将MessageSourceAccessor注入到您的 bean 中，而是注入原始MessageSource，然后根据需要将其包装在MessageSourceAccessor中（即使用>new MessageSourceAccessor(messageSource))。然后，您可以将建议放在
MessageSource周围，而不是放在MessageSourceAccessor周围，这样效果会更好。此外，MessageSourceAccessor本身不会增加任何显着的处理时间，它只是MessageSource的一个薄包装。You don't need really need to configure
MessageSourceAccessoraccessor as a bean, it's generally easier to instantiate it manually as required. So rather than inject theMessageSourceAccessorinto your beans, inject the rawMessageSource, and then wrap it in aMessageSourceAccessoras required (i.e. usingnew MessageSourceAccessor(messageSource)).You can then put the advice around the
MessageSourcerather than theMessageSourceAccessor, which will work better. Also,MessageSourceAccessorwill not itself add any significant processing time, it's just a thin wrapper aroundMessageSource.