JAsCo

1
JAsCo

• an Aspect-Oriented approach tailored for
• Component Based Software Development

2
Crosscutting Concerns

• public long doSomething()
• if(!Security.isAuthorized())
• return AUTHERROR
• Transaction.begin()
• try
• doTheThing()
• Transaction.commit()
• catch(Exeception e)
• Log.error(e)
• Transaction.rollback()
• return 0

3
Security

• public long doSomething()
• if(!Security.isAuthorized())
• return AUTHERROR
• Transaction.begin()
• try
• doTheThing()
• Transaction.commit()
• catch(Exeception e)
• Log.error(e)
• Transaction.rollback()
• return 0

4
Consistency

• public long doSomething()
• if(!Security.isAuthorized())
• return AUTHERROR
• Transaction.begin()
• try
• doTheThing()
• Transaction.commit()
• catch(SomeErrorEvent e)
• Log.error(e)
• Transaction.rollback()
• return 0

5
Logging

• public long doSomething()
• if(!Security.isAuthorized())
• return AUTHERROR
• Transaction.begin()
• try
• doTheThing()
• Transaction.commit()
• catch(Exeception e)
• Log.error(e)
• Transaction.rollback()
• return 0

6
Actual Purpose

• public long doSomething()
• doTheThing()

7
Join Points

• Method Invocations / Property Accesses
• On Events

Interceptor
Glue Code/ Component/ Environment
Component
Invocation
Event
8
Weaving
Component
Subclass
Logging Aspect
Security Aspect
doSomething()
9
JAsCo Keywords

• hook
• connector
• execute
• cflow
• on event
• signature wildcards

10
(No Transcript)
11
(No Transcript)
12
(No Transcript)