1. AOP issues

2. Class/Aspect Table

3. Loose Coupling Classes/Aspects When we evolve a class, how many aspects do we have to change? When we evolve an aspect, how many classes are affected? Ideally none. Classes oblivious of aspects.

4. Techniques for loose coupling of aspects/classes AP: structure-shy programming AC: put crosscutting into adapters Doug: BOP: each method encapsulates the condition when it is applicable. More kinds of cond. lead to better separation of concerns parameterize: decouple aspects from classes

5. variables in pointcut designators more efficient: can generate faster code pointcuts separated from advice. Abstract pointcuts. –x from first arg, x from second arg. Extra layer of abstraction –virtual class = type defined by predicate. Exported variables become virtual fields

6. other reasons for differential programming than evolution behavior variation –kind specific: oo –context-dependent state dependent: predicate over arguments perspective dependent: person takes different roles; overlapping predicates; predicate dispatch; multi-way association application dependent:depends on calling context; jumping aspect; only trace from caller x. Generic usage pattern; open implementation example: too many windows. previous decision point environment dependent:network bandwidth changes dynamically; network- aware application; QuO; access to global system functions inside predicates. Variation of state.

7. Service Business does doug have introductions? enabler bundles: Party, Address, Addressing, ProductOffering, BusinessInstance consolidation bundle: assigns values to fields of ProductOffering objects, BusinessInstance

8. Service Business delivery bundle

9. Design: Service Business enabler bundles: –PartyB: Party and LabeledPartyGraph –AddressB: Address, Addressing –ProductB: ProductOffering –EventB: EnablerEvent –EligibilityB: consolidation bundle: –AgreementB: Agreement delivery bundles:

10. Design: Service Business delivery bundles: –EventB: DeliveryEvent, EventTracking –AccountB: FeeComp, InterestComp, Position –AvailabilityB: Availability –RiskB: uses Availability