Framework Services for AOP

Up to now, we have had to write a lot of code to advise objects and generate the proxies for them. Although this in itself is not a huge problem, it does mean that all advice configuration is hard-coded into your application, removing some of the benefits of being able to advise a method implementation transparently. Thankfully, Spring provides additional framework services that allow you to create an advised proxy in your application configuration and then inject this proxy into a target bean just like any other dependencies.

Using the declarative approach to AOP configuration is preferable to the manual, programmatic mechanism. When you use the declarative mechanism, not only do you externalize the configuration of advice, but you also reduce the chance of coding errors. You can also take advantage of DI and AOP combined to enable AOP so it can be used in a completely transparent environment.