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Talk:Aspect oriented programming: Difference between revisions
give my understanding
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:::I only made a guess at intent. I can't say anything about the quality. I don't understand AOP very well either. If someone wanted to improve the info here that'd be great. --[[User:Mwn3d|Mwn3d]] 01:05, 10 June 2011 (UTC)
::::In my experience, AOP is an attempt to address the issues a person might want to address using a Domain Specific Language, but without the conciseness, nor the modularity (with strong lip-service to the concept of modularity, but what I have seen in implementations does not align with my feelings about modularity). Now, granted, the theory (MVC++) usually sounds great, but the examples I have seen (Observer++) have made me want a good DSL implementation. -- --[[User:Rdm|Rdm]] 11:31, 10 June 2011 (UTC)
::::: AOP allows you to wrap cross-cutting functionality round other code without disrupting that other code particularly. The way in which it is most strongly used in frameworks like Spring is to provide transactions round methods, so that all a method has to do is to work with the data and let the aspect handle the transaction (including things like rolling the changes back if an exception is thrown). Having tried to write transaction-handling code without AOP, using an aspect to handle it is ''far'' simpler; it's genuinely difficult to get transaction handling correct and it makes the code very ugly when you do, but splitting it off into its own concern (the “aspect”) means that the business logic is separated from the complexity. It's also used for things like logging, cacheing, security enforcement, etc. All things that are typically orthogonal to the core of what's going on. The degree to which aspects should be applied transparently or with some kind of explicit marker is something which seems to divide practitioners; I'm more of an “explicit” guy as its easier to see what's going on when maintaining the code… –[[User:Dkf|Donal Fellows]] 15:18, 10 June 2011 (UTC)
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