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I have the following questions regarding MBean and MXBean:
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There is no semantic difference, they mean exactly the same thing. It's just a difference in how their XML namespaces are declared.
@Bean is just for the metadata definition to create the bean(equivalent to tag). @Autowired is to inject the dependancy into a bean(equivalent to ref XML tag/attribute).
Spring @Bean Annotation is applied on a method to specify that it returns a bean to be managed by Spring context. Spring Bean annotation is usually declared in Configuration classes methods. In this case, bean methods may reference other @Bean methods in the same class by calling them directly.
@Component is a class-level annotation, but @Bean is at the method level, so @Component is only an option when a class's source code is editable. @Bean can always be used, but it's more verbose. @Component is compatible with Spring's auto-detection, but @Bean requires manual class instantiation.
MXBeans are just a special kind of MBeans. The main difference is that MXBean restrict the data types, so that they are "more compatible" with potential clients.
As example: a MBean can expose attributes of a data type Foo. Now the client also needs to have this type Foo to make sense of the attribute.
The MXBean tries to restrict the data types to those "already available" - java.lang.* etc.
See this tutorial
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