1. Ectropic Design: Support for Open Source Development
Spencer Rugaber, Kathy Gray, Mark Guzdial
Friday, September 21, 2018Friday, September 21, 2018

2. What is Ectropy?? Ectropy = ¬ Entropy Ectropy is “order out of chaos”
Good Description of Open Source Development…!
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3. Open Source Success Stories
Linux
Linus Torvals
gcc
Richard Stallman
python
Guido Von Rossum
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4. Open Source Development only works...
When there is a Champion
Someone who maintains coherence of the design over time,
Someone who integrates changes in a reasonable way,
Someone who is the recognized authority in identifying a new release.
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5. Can we do Open Source with an automated Champion?
Imagine a server that:
Accepts code from a team of programmers
Knows the programmers and their tasks
Makes sure that the code meets design requirements
Alerts the team to issues
Integrates software to define a “release”
Big job!
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6. Our Solution: Ectropic Software
Ectropic Software evolves over time
becoming more highly structured
better able to accomplish goals of its users
Ectropic Objects are all bound to the goals they meet
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7. Ectropic Software Two Key Ideas Ectropic Design Ectrospace
A design method by which order and structure are created from collaborative efforts of multiple, unrelated software developers
Ectrospace
active collaboration space to support Ectropic Design
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8. (pronounced “echoed”)
Introducing ECode
Ectropic
COllaborative
Design
Environment
(pronounced “echoed”)
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9. But First! A Review of OOA/OOD/OOP
A Review of Object Oriented Software Design
OOA
OOD
OOP
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10. OOA Object Oriented Analysis (OOA) Requirements Analysis
Use of Scenarios in Requirements Analysis
Build List of Collaborator-Responsibility Cards (CRC Cards)
Distribute Responsibilities Among CRC Cards
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11. OOD Object Oriented Design
Complete all Scenarios with Responsibility-CRC Card Pairs
Add Method Names, with method categories and descriptions
Integrity Check!
Friday, September 21, 2018Friday, September 21, 2018

12. OOP Object Oriented Programming Select CRC Cards for Classes
Generate Class Stubs
Complete Full Implementation of Classes
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13. ECODE Ectropic Collaborative Design Environment
A design tool to assist you in mapping an Object-oriented design process to Ectropic
A non-collaborative prototype release
For design purposes - not to replace the Squeak programming environment!
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14. Getting Started with Ecode
Download and filein from the class coweb:
Ectropic-Basic.st
Ectropic-Views.st
Copy to your Squeak folder:
logo.gif
Save your image.
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15. Ectropic Objects EctropicDesign Scenario CRCCard Responsibility
has Scenario(s) and CRCCard(s)
Scenario
has Responsibility/CRCCard pairs
CRCCard
has Responsibility(s)
Responsibility
has a Method and possibly a CRCCard collaborator
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16. Main Ecode Approach Analysis Mode Design Mode Program Mode
Determine CRCCards and Responsibilities using Scenarios
Design Mode
Distribute Responsibilities to CRCCards and create a Method for all Responsibilities
Program Mode
Create Class stubs from selected CRCCards
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17. Analysis Mode Requirements Analysis
Use Scenarios to Help with Requirements Analysis
Build List of Collaborator-Responsibility Cards (CRC Cards)
Distribute Responsibilities Among CRC Cards
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18. Scenarios Help with Design!
Determine a Scenario for a Task
Build the Scenario, step-by-step by creating a set of Responsibilities
Assign each Responsibility to a CRCCard
ECoDE will allow you to select or create CRCCards
All Responsibilities should be assigned to or removed
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19. Design Mode Complete all Scenarios with Responsibility-CRC Card Pairs
Add Method Names, with method categories and descriptions
Integrity Check!
Friday, September 21, 2018Friday, September 21, 2018

20. Integrity Check
When shifting to Program Mode, ECoDE makes a quick integrity check for you
Are all responsibilities assigned to CRCCards?
Do all responsibilities have associated method names?
You have the option to continue
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21. Program Mode Select CRC Cards for Classes Generate Class Stubs
Parent Class
Instance Variables
Complete Full Implementation of Classes
In a System Browser!
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22. Compile Errors This version of ECoDE will not catch all compile errors
When generating code, if you get the pink compile error
Abandon
Correct your code
Retry
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23. Completing the Implementation
ECoDE is not intended to replace the built-in programming environment in Squeak
It is a design tool – which will generate Class stubs for you
It is highly recommended that you switch to a System Browser when completing your implementation
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24. Saving Your Work – 2 Ways Save Project (for turnin) Save
Snapshot of your image as a .pr file
Many open windows = long long time!
BUT main ECoDE window MUST be open!
Save
Saves your design with a simple fileout
Saves a .ect file and a .st file
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25. Loading Designs When loading your design (not as project)
ECoDE loads the corresponding .st file
MAKE SURE the .st file in the same directory with your .ect file is the MOST RECENT copy
Of course you can always close and retry without saving image
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26. Critical Reminders! Copy logo.gif to your squeak directory
When transferring saved designs, you need to transfer both
designName.ect file
designName.st file (MOST RECENT!)
When saving project for turnin, USE ECoDE for save, NOT Squeak Navigator “Publish It”
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27. UML Options In Squeak, ConnectorMorphs Rational Rose Visio
Hand-draw diagrams and scan
Power-point drawings
See
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28. Turnin See http://coweb.cc.gatech.edu/cs2340/1937 for details
TA’s want PROJECTS!!
But if any problems saving as project
Do regular save
Turnin .ect and .st files along with diagrams
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29. Technical Assistance Kathy Gray, kgray@cc Jonathan D’Andries, bane@cc
Office hours: Tuesday, 1:30 – 3:00
Jonathan D’Andries,
Office hours: Wednesday, 11 – 1
Friday, September 21, 2018Friday, September 21, 2018

30. ECoDE on CoWeb ECoDE on CoWeb Defect Log Usability Log
from class admin page)
Defect Log
Usability Log
Comments/Feedback/Suggestions
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31. Classroom Experiment Consent Forms Preliminary Survey
Problems with Prototype
Your feedback is critical!
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32. Advice! Design before coding! Save and manage saved files well
Teams should consider configuration management with Designs!
Back up your work
Report Bugs immediately
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33. Questions?
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