| [aspectj-users] Why does every Aspect (pertarget(..)) add fields and interfaces to classes which are not targeted?? |
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Hello.
I am writing a series of small POC Aspects which revolve around various annotations. I just noticed while debugging that classes not annotated with the designated annotations have some extraneous fields/interfaces injected during the weaving process.
I was hoping someone could explain what it is, why they are there and how I can trim the resulting class files during weaving to be as nimble as possible – i.e. remove all the extra fields / interfaces from classes which *SHOULD* not be effected by aspects in the first place. Don’t get me wrong – I understand the need for injecting fields, methods and such to support the runtime – but why on classes which have explicitly not been targeted with an aspect. Looking at the name (interface FairLockAspect$ajcMightHaveAspect ) implies this is a forward compatibility feature. Is there a quick way to turn this off? I tried the “not reweavable” option in eclipse preferences – but that did not help J (I am grabbing at straws)
My fear is that – if as a team we introduce 100 aspects (annotation driven) – the memory for classes / instances across the board will grow dramatically. In our system, we are already pushing memory requirements into multiple gigs – if every object we have has a placeholders for every potential (pertarget assoc.) aspect in our system, I think this will be a show stopper for using AspectJ in production.
Here is an example a class used in unit-testing which IMO should have no references or knowledge of aspects period.
Thanks for the Help!!!! Sorry if I am on crack and have missed something real obvious J Jody
// class version 49.0 [49] (Java 1.5) // compiled from TestPersistentObject.java // access flags 33 public class com/q1labs/frameworks/naming/testcomps/TestPersistentObject extends com/q1labs/frameworks/comp/BasePersistentComponent implements com/q1labs/frameworks/comp/FairLockAspect$ajcMightHaveAspect com/q1labs/frameworks/comp/UnfairLockAspect$ajcMightHaveAspect com/q1labs/frameworks/performance/TimeCriticalAspect$ajcMightHaveAspect {
// access flags 130 private transient FairLockAspect ajc$com_q1labs_frameworks_comp_FairLockAspect$perObjectField // access flags 130 private transient UnfairLockAspect ajc$com_q1labs_frameworks_comp_UnfairLockAspect$perObjectField // access flags 130 private transient TimeCriticalAspect ajc$com_q1labs_frameworks_performance_TimeCriticalAspect$perObjectField
....
// access flags 1 public ajc$com_q1labs_frameworks_comp_FairLockAspect$perObjectGet (): FairLockAspect L0 (1) ALOAD 0 GETFIELD TestPersistentObject.ajc$com_q1labs_frameworks_comp_FairLockAspect$perObjectField: FairLockAspect ARETURN
// access flags 1 public ajc$com_q1labs_frameworks_comp_FairLockAspect$perObjectSet (FairLockAspect): void L0 (1) ALOAD 0 ALOAD 1 PUTFIELD TestPersistentObject.ajc$com_q1labs_frameworks_comp_FairLockAspect$perObjectField: FairLockAspect RETURN
// access flags 1 public ajc$com_q1labs_frameworks_comp_UnfairLockAspect$perObjectGet (): UnfairLockAspect L0 (1) ALOAD 0 GETFIELD TestPersistentObject.ajc$com_q1labs_frameworks_comp_UnfairLockAspect$perObjectField: UnfairLockAspect ARETURN
// access flags 1 public ajc$com_q1labs_frameworks_comp_UnfairLockAspect$perObjectSet (UnfairLockAspect): void L0 (1) ALOAD 0 ALOAD 1 PUTFIELD TestPersistentObject.ajc$com_q1labs_frameworks_comp_UnfairLockAspect$perObjectField: UnfairLockAspect RETURN
// access flags 1 public ajc$com_q1labs_frameworks_performance_TimeCriticalAspect$perObjectGet (): TimeCriticalAspect L0 (1) ALOAD 0 GETFIELD TestPersistentObject.ajc$com_q1labs_frameworks_performance_TimeCriticalAspect$perObjectField: TimeCriticalAspect ARETURN
// access flags 1 public ajc$com_q1labs_frameworks_performance_TimeCriticalAspect$perObjectSet (TimeCriticalAspect): void L0 (1) ALOAD 0 ALOAD 1 PUTFIELD TestPersistentObject.ajc$com_q1labs_frameworks_performance_TimeCriticalAspect$perObjectField: TimeCriticalAspect RETURN }
------------------------------------------ Jody Brownell Software Developer Q1
Labs Inc –
Network Security Enforcement for the Office: 506-462-9117 ext 109 jody.brownell@xxxxxxxxxx | www.q1labs.com
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