[Meinds-developers] Aspects: pro's and con's

[Rickard <ri...@xp...>]

Hey

Having tinkered a bit more with the aspect stuff, I have found a couple 
of problems with the approach.

First of all, the most obvious problem: it is not possible for an 
AOP-object to implement interfaces with methods that clash. I.e. you 
can't have interfaces A and B that both have "String getName()" methods 
in them. If they have different method signatures it's ok. This may not 
be a big problem in reality, but it's something to watch for.

Second, the performance impact. The current code uses reflection and 
dynamic proxies, so there's an 0.03ms/call overhead. This may become a 
problem with huge amounts of objects.

That said, I think I have found a way to get around the performance 
problem. Instead of using dynamic proxies one can use the TechTrader 
Bytecode Toolkit (http://sourceforge.net/projects/tt-bytecode/) to 
generate these proxies. Then it is possible to entirely avoid 
reflection, which should improve performance to the point where it's 
almost no overhead at all.

Any other thoughts from people on the list about this? You're a very 
quiet crowd...

/Rickard

-- 
Rickard Öberg