spring aop FastClassBySpringCGLIB vs EnhancerBySpringCGLIB
I have got an exception stacktrace, see picture below, in the stacktrace, there are $$FastClassBySpringCGLIB$$ and $$EnhancerBySpringCGLIB$$(underscored by light red color), they are for the same DAO class, I have @Transactional and @DataSource(for switch datasource) on DAO method. what is the difference between Fast and Enhancer? why need both of them?
Your question is quite technical, so please forgive me if my answer is as well, pointing you to a nice unofficial CGLIB manual. There you can find all kinds of details about both Enhancer and FastClass. I will not quote them here.
If you do not want to read the manual (which I would understand), all you need to know is that these are the internal workings of CGLIB or how Spring chooses to use it, respectively.
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