Download as PDF, PPTX
Uploaded byRaffi Khatchadourian
Rejuvenate Pointcut: A Tool for Pointcut Expression Recovery in Evolving Aspect-Oriented Software
The document presents the rejuvenation approach in aspect-oriented programming (AOP), focusing on the recovery of pointcut expressions (PCEs) in evolving software. It addresses the 'fragile pointcut problem,' where changes in base code can render existing PCEs invalid, and proposes methods to automatically infer join points for updated PCEs. Additionally, it introduces a research tool developed for extracting and applying patterns from concern graphs to assist in maintaining valid PCEs as software evolves.
More Related Content
Similar to Rejuvenate Pointcut: A Tool for Pointcut Expression Recovery in Evolving Aspect-Oriented Software
![Getting Started with Apache Spark: Big Data Made Simple [Free Meetup]](https://cdn.slidesharecdn.com/ss_thumbnails/apachesparkgettingstarted-260203175547-8361bcc3-thumbnail.jpg?width=640&height=640&fit=bounds)
Rejuvenate Pointcut: A Tool for Pointcut Expression Recovery in Evolving Aspect-Oriented Software
- 1. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Rejuvenate Pointcut1 A Tool for Pointcut Expression Recovery in Evolving Aspect-Oriented Software Raffi Khatchadourian, Awais Rashid khatchad@cse.ohio-state.edu,awais@comp.lancs.ac.uk Ohio State University, Lancaster University September 29, 2008 1 This material is based upon work supported in part by European Commission grants IST-33710 (AMPLE) and IST-2-004349 (AOSD-Europe). Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 2. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Outline 1 Brief Introduction to AOP 2 Rejuvenation Approach 3 Simple Motivating Example Phase I: Analysis Phase II: Rejuvenation 4 Downloads Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 3. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Aspect-Oriented Programming AOP reduces scattering and tangling of crosscutting concern (CCCs) implementations. Developer specifies behavior (advice). Advice is composed at specific execution points (join points). Join points specified via pointcut expressions (PCEs). Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 4. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Aspect-Oriented Programming AOP reduces scattering and tangling of crosscutting concern (CCCs) implementations. Developer specifies behavior (advice). Advice is composed at specific execution points (join points). Join points specified via pointcut expressions (PCEs). Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 5. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Aspect-Oriented Programming AOP reduces scattering and tangling of crosscutting concern (CCCs) implementations. Developer specifies behavior (advice). Advice is composed at specific execution points (join points). Join points specified via pointcut expressions (PCEs). Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 6. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Aspect-Oriented Programming AOP reduces scattering and tangling of crosscutting concern (CCCs) implementations. Developer specifies behavior (advice). Advice is composed at specific execution points (join points). Join points specified via pointcut expressions (PCEs). Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 7. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Example PCEs execution(* Foo.*(..)) execution(* Foo.methodA()) Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 8. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Example PCEs execution(* Foo.*(..)) execution(* Foo.methodA()) Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 9. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Fragile Pointcut Problem Constructing optimal pointcut expressions that capture true intentions of where a CCC applies can be difficult. Ideally, pointcut expressions (PCEs) should remain valid as the software evolves. However, situations arise where base-code alterations induce the invalidity of existing PCEs. PCEs must be amended as a result. But which join points should be included? Can we automatically infer join points that should be included in the new version of the PCE upon evolution? Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 10. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Fragile Pointcut Problem Constructing optimal pointcut expressions that capture true intentions of where a CCC applies can be difficult. Ideally, pointcut expressions (PCEs) should remain valid as the software evolves. However, situations arise where base-code alterations induce the invalidity of existing PCEs. PCEs must be amended as a result. But which join points should be included? Can we automatically infer join points that should be included in the new version of the PCE upon evolution? Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 11. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Fragile Pointcut Problem Constructing optimal pointcut expressions that capture true intentions of where a CCC applies can be difficult. Ideally, pointcut expressions (PCEs) should remain valid as the software evolves. However, situations arise where base-code alterations induce the invalidity of existing PCEs. PCEs must be amended as a result. But which join points should be included? Can we automatically infer join points that should be included in the new version of the PCE upon evolution? Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 12. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Fragile Pointcut Problem Constructing optimal pointcut expressions that capture true intentions of where a CCC applies can be difficult. Ideally, pointcut expressions (PCEs) should remain valid as the software evolves. However, situations arise where base-code alterations induce the invalidity of existing PCEs. PCEs must be amended as a result. But which join points should be included? Can we automatically infer join points that should be included in the new version of the PCE upon evolution? Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 13. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Fragile Pointcut Problem Constructing optimal pointcut expressions that capture true intentions of where a CCC applies can be difficult. Ideally, pointcut expressions (PCEs) should remain valid as the software evolves. However, situations arise where base-code alterations induce the invalidity of existing PCEs. PCEs must be amended as a result. But which join points should be included? Can we automatically infer join points that should be included in the new version of the PCE upon evolution? Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 14. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Fragile Pointcut Problem Constructing optimal pointcut expressions that capture true intentions of where a CCC applies can be difficult. Ideally, pointcut expressions (PCEs) should remain valid as the software evolves. However, situations arise where base-code alterations induce the invalidity of existing PCEs. PCEs must be amended as a result. But which join points should be included? Can we automatically infer join points that should be included in the new version of the PCE upon evolution? Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 15. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads The Idea Capture rich program element relationships in a concern graph adapted for AOP. Associate graph elements with join point shadows contained in the PCE. Extract patterns from finite, acyclic paths in the graph. Place wildcards in place of the associated elements. Apply the patterns to the evolved version of the base-code. Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 16. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads The Idea Capture rich program element relationships in a concern graph adapted for AOP. Associate graph elements with join point shadows contained in the PCE. Extract patterns from finite, acyclic paths in the graph. Place wildcards in place of the associated elements. Apply the patterns to the evolved version of the base-code. Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 17. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads The Idea Capture rich program element relationships in a concern graph adapted for AOP. Associate graph elements with join point shadows contained in the PCE. Extract patterns from finite, acyclic paths in the graph. Place wildcards in place of the associated elements. Apply the patterns to the evolved version of the base-code. Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 18. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads The Idea Capture rich program element relationships in a concern graph adapted for AOP. Associate graph elements with join point shadows contained in the PCE. Extract patterns from finite, acyclic paths in the graph. Place wildcards in place of the associated elements. Apply the patterns to the evolved version of the base-code. Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 19. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads The Idea Capture rich program element relationships in a concern graph adapted for AOP. Associate graph elements with join point shadows contained in the PCE. Extract patterns from finite, acyclic paths in the graph. Place wildcards in place of the associated elements. Apply the patterns to the evolved version of the base-code. Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 20. Brief Introduction toAOP Rejuvenation Approach Phase I: Analysis Simple Motivating Example Phase II: Rejuvenation Downloads Base-code package p ; public class A { int f ; void m1 () { int a = f + 1; } void m2 () { int b = f + 2; } void n () { int c = f + 3; } } Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 21. Brief Introduction toAOP Rejuvenation Approach Phase I: Analysis Simple Motivating Example Phase II: Rejuvenation Downloads Concern Graph p contains A declares_method declares_method declares_method A.m2() declares_field A.n() A.m1() gets_field gets_field gets_field A.f Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 22. Brief Introduction toAOP Rejuvenation Approach Phase I: Analysis Simple Motivating Example Phase II: Rejuvenation Downloads An Aspect package p ; public aspect B { before () : execution (* m *(..) ) { } } Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 23. Brief Introduction toAOP Rejuvenation Approach Phase I: Analysis Simple Motivating Example Phase II: Rejuvenation Downloads Concern Graph p contains A declares_method declares_method declares_method A.m2() declares_field A.n() A.m1() gets_field gets_field gets_field A.f Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 24. Brief Introduction toAOP Rejuvenation Approach Phase I: Analysis Simple Motivating Example Phase II: Rejuvenation Downloads Base-code // . . . void o () { int d = f + 4; } // . . . Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 25. Brief Introduction toAOP Rejuvenation Approach Phase I: Analysis Simple Motivating Example Phase II: Rejuvenation Downloads Concern Graph p contains A declares_method declares_method declares_method declares_method A.m2() declares_field A.n() A.o() A.m1() gets_field gets_field gets_field gets_field A.f Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 26. Brief Introduction toAOP Rejuvenation Approach Phase I: Analysis Simple Motivating Example Phase II: Rejuvenation Downloads Patterns and Suggestions Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 27. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Tool and Material Downloads Tool research prototype publicly available at http://code.google.com/p/rejuvenate-pc. Research related material publicly available at http://sites.google.com/site/pointcutrejuvenation. Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut
- 28. Brief Introduction toAOP Rejuvenation Approach Simple Motivating Example Downloads Question for SCAM Do more expressive PCE languages truly solve the fragile pointcut problem? Raffi Khatchadourian, Awais Rashid Rejuvenate Pointcut