a study of ripple effects in software ecosystems (icse presentation)
DESCRIPTION
Presented at ICSE 2011 in the New Ideas and Emerging Results track. In the associated paper we show that in a real world ecosystem ripple effects are frequent, long lived, and can have a very broad impact. More at: http://scg.unibe.ch/scgbib?query=lungu+rippleTRANSCRIPT
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A Study of Ripple Effects In Software Ecosystems
Romain Robbes Mircea LunguUniversity of Chile University of Bern
Tuesday, June 7, 2011
![Page 2: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/2.jpg)
Ripple Effects
Architecture of Moose 3.2 made with Softwarenaut
Tuesday, June 7, 2011
![Page 3: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/3.jpg)
Ripple Effects
Architecture of Moose 3.2 made with Softwarenaut
Tuesday, June 7, 2011
![Page 4: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/4.jpg)
Ripple Effects
Architecture of Moose 3.2 made with Softwarenaut
Tuesday, June 7, 2011
![Page 5: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/5.jpg)
Ecosystem Ripple Effects
Moose in the SCG Eco-system, made with SPOTuesday, June 7, 2011
![Page 6: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/6.jpg)
Ecosystem Ripple Effects
? ? ?
?
? ?
?
??
Evidence?Moose in the SCG Eco-system, made with SPOTuesday, June 7, 2011
![Page 7: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/7.jpg)
Evidence from mailing lists
• In the paper
• Seaside
• Moose
• ...
Tuesday, June 7, 2011
![Page 8: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/8.jpg)
Evidence from mailing lists
• In the paper
• Seaside
• Moose
• ...
Seaside User: I noticed that the dialog classes listed below are not in [new version]. I am wondering if these classes have been dropped, have not been ported to [new version] or does their func- tionality exists elsewhere?
Tuesday, June 7, 2011
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Evidence from mailing lists
• In the paper
• Seaside
• Moose
• ...
Seaside User: I noticed that the dialog classes listed below are not in [new version]. I am wondering if these classes have been dropped, have not been ported to [new version] or does their func- tionality exists elsewhere?
Seaside Developer: They have been dropped. A mail went out to this list if anybody still used them and nobody replied. [...] Personally I donʼt know of any application that uses these dialogs.
Tuesday, June 7, 2011
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Evidence from mailing lists
• In the paper
• Seaside
• Moose
• ...
Moose User: [...] where is MOLabelShape, why was it deleted?? I use it and now is gone!!! I even had a specialization of it [...]
Tuesday, June 7, 2011
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Evidence from an ecosystem history
Tuesday, June 7, 2011
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Evidence from an ecosystem history
• SqueakSource - More than
• 7 years of history
• 2000 projects
• 3000 developers
Tuesday, June 7, 2011
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Searching for Ripples
Tuesday, June 7, 2011
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Searching for Ripples• Source: additions, deletions, modifications, deprecations
Tuesday, June 7, 2011
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Searching for Ripples• Source: additions, deletions, modifications, deprecations
• Algorithm for deprecation-based-ripples
Tuesday, June 7, 2011
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Searching for Ripples• Source: additions, deletions, modifications, deprecations
• Algorithm for deprecation-based-ripples
1. Find all the entities in the ecosystem that were deprecated
Tuesday, June 7, 2011
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Searching for Ripples• Source: additions, deletions, modifications, deprecations
• Algorithm for deprecation-based-ripples
1. Find all the entities in the ecosystem that were deprecated
2. For each look at all the events that involve that entity and/or its suggested replacement
Tuesday, June 7, 2011
![Page 18: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/18.jpg)
Searching for Ripples• Source: additions, deletions, modifications, deprecations
• Algorithm for deprecation-based-ripples
1. Find all the entities in the ecosystem that were deprecated
2. For each look at all the events that involve that entity and/or its suggested replacement
3. Replacements that happened after the deprecation as consequences of a ripple
Tuesday, June 7, 2011
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Top 5 Ripples from The Case Study
Origin System Deprecated Method Systematic Replacement
# of Affected Systems
# of Affected Developers
System-Support Author initials Author fullName 120 110Seaside WACanvas bold: WACanvas strong: 61 59Seaside WASession
registerForBackgracking:(...) states 43 47
Famix-Core FAMIXNamedEntity packagedIn
FAMIXNamedEntity parentPackage
33 11
Kernel ClassDescription metaclass ClassDescription theMetaClass
31 34
System-Support Utilities authorInitials Author initials 37 45Kernel Object isKindOf:orOf: 12 24Collections-Text Text isoToSqueak 18 22
Tuesday, June 7, 2011
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A Ripple Example
remove
add
old
new
... other
ripple
revert
Tuesday, June 7, 2011
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A Ripple Example
packagedIn renamed to
parentPackage
remove
add
old
new
... other
ripple
revert
Tuesday, June 7, 2011
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A Ripple Example
update, revert, update again
remove
add
old
new
... other
original
ripple
revert
Tuesday, June 7, 2011
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A Ripple Example
ripples
Tuesday, June 7, 2011
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A Ripple Example
inconsistent state
Tuesday, June 7, 2011
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Conclusions
Tuesday, June 7, 2011
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Conclusions• Evidence that ecosystem ripple effects can
Tuesday, June 7, 2011
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Conclusions• Evidence that ecosystem ripple effects can
• Have a broad impact
Tuesday, June 7, 2011
![Page 28: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/28.jpg)
Conclusions• Evidence that ecosystem ripple effects can
• Have a broad impact
• Have a long life
Tuesday, June 7, 2011
![Page 29: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/29.jpg)
Conclusions• Evidence that ecosystem ripple effects can
• Have a broad impact
• Have a long life
• Developers don’t know their clients
Tuesday, June 7, 2011
![Page 30: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/30.jpg)
Conclusions• Evidence that ecosystem ripple effects can
• Have a broad impact
• Have a long life
• Developers don’t know their clients
• Angry impactees
Tuesday, June 7, 2011
![Page 31: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/31.jpg)
Conclusions• Evidence that ecosystem ripple effects can
• Have a broad impact
• Have a long life
• Developers don’t know their clients
• Angry impactees
• Defensive deprecation
Tuesday, June 7, 2011
![Page 32: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/32.jpg)
Ripple Effects of the Article
Tuesday, June 7, 2011
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Ripple Effects of the Article
• Extended Version
Tuesday, June 7, 2011
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Ripple Effects of the Article
• Extended Version
• Tool Support
Tuesday, June 7, 2011
![Page 35: A Study of Ripple Effects in Software Ecosystems (ICSE Presentation)](https://reader033.vdocuments.site/reader033/viewer/2022042816/5590c9fc1a28ab38538b465e/html5/thumbnails/35.jpg)
Ripple Effects of the Article
• Extended Version
• Tool Support
• Study replication in different ecosystems
Tuesday, June 7, 2011