A presentation I gave on Refactoring for the RIA Unleashed conference in 2011 up in Boston. Video References: Winston Wolfe - I Solve Problems form Pulp Fiction http://www.youtube.com/watch?v=DO0d7dpA-K8 And the ready scene from The Last Samurai: http://www.youtube.com/watch?v=QE3yMEfpk6E

1. Refactoring
Jesse Warden

2. Who?

3. Who?
• Jesse Warden

4. Who?
• Jesse Warden
• Web App Solution

5. Who?
• Jesse Warden
• Web App Solution
• Flex, Java, and BlazeDS Consulting

6. What?

7. What?
• Basic Refactoring

8. What?
• Basic Refactoring
• Priority Pyramid

9. What?
• Basic Refactoring
• Priority Pyramid
• Stories

10. What?
• Basic Refactoring
• Priority Pyramid
• Stories
• Leadership

11. Why?

12. Why?
• Coding is more fun

13. Why?
• Coding is more fun
• People like working with you

14. Why?
• Coding is more fun
• People like working with you
• Grow in your career

15. Why?
• Coding is more fun
• People like working with you
• Grow in your career
• Better Software

16. No seriously...

17. No seriously...
• I loathe it

18. No seriously...
• I loathe it
• People have said articles helped them

19. No seriously...
• I loathe it
• People have said articles helped them
• Mentor Leadership / Stewardship

20. Basics

21. Basics
• Exceptions

22. Basics
• Exceptions
• Architecture

23. Basics
• Exceptions
• Architecture
• Refactoring Paths

24. Exceptions

25. Exceptions
• Synchronous: 100%

26. Exceptions
• Synchronous: 100%
• Asynchronous: 99%

27. Exceptions
• Synchronous: 100%
• Asynchronous: 99%
• Null Pointers

28. Synchronous

29. Synchronous
• throw new Error(“b00m”);

30. Synchronous
• throw new Error(“b00m”);
• try/catch

31. Synchronous
• throw new Error(“b00m”);
• try/catch
• “Road to hell is paved with good intentions.”

32. Asynchronous

33. Asynchronous
• dispatchEvent(new ErrorEvent(“b00m”));

34. Asynchronous
• dispatchEvent(new ErrorEvent(“b00m”));
• addEventListener(“b00m”, onHandle);

35. Asynchronous
• dispatchEvent(new ErrorEvent(“b00m”));
• addEventListener(“b00m”, onHandle);
• Same as before, don’t swallow.

36. Uncaught

37. Uncaught
• loaderInfo.uncaughtErrorEvents

38. Uncaught
• loaderInfo.uncaughtErrorEvents
• won’t always get a stack trace

39. Uncatchable

40. Uncatchable
• Error #2044: Unhandled IOErrorEvent:.
text=Error #2036: Load Never Completed.

41. Null Pointers

42. Null Pointers
• Sir Charles Antony Richard Hoare

43. Null Pointers
• Sir Charles Antony Richard Hoare
• British Computer Scientist

44. Null Pointers
• Sir Charles Antony Richard Hoare
• British Computer Scientist
• "I call it my billion-dollar mistake"

45. Null Pointers
• Sir Charles Antony Richard Hoare
• British Computer Scientist
• "I call it my billion-dollar mistake"
• Programmer Enemy #1

46. Null Pointers

47. Null Pointers
• Loose Typing

48. Null Pointers
• Loose Typing
• External Data

49. ExternalInterface

50. ExternalInterface
• Marshall Exceptions

51. ExternalInterface
• Marshall Exceptions
• set to true

52. Exceptions

53. Exceptions
• Crashes

54. Exceptions
• Crashes
• Unexpected/Unrelated Errors

55. Exceptions
• Crashes
• Unexpected/Unrelated Errors
• Breed Insecurity

56. Exceptions
• Crashes
• Unexpected/Unrelated Errors
• Breed Insecurity
• Cause Fire Drills

57. Exceptions

58. Exceptions
• Best Defense is a Good Offense

59. Exceptions
• Best Defense is a Good Offense
• Broken Windows

60. Fighting Back

61. Fighting Back
• try/catch

62. Fighting Back
• try/catch
• log the catch

63. Fighting Back
• try/catch
• log the catch
• log uncaughtErrors

64. Fighting Back
• try/catch
• log the catch
• log uncaughtErrors
• Code Review

65. Loose Typing

66. Loose Typing
• Object

67. Loose Typing
• Object
• Dictionary

68. Loose Typing
• Object
• Dictionary
•*

69. Loose Typing
• Object
• Dictionary
•*
• Dynamic

70. Loose Typing
• Object
• Dictionary
•*
• Dynamic
• Interfaces

71. Object

72. Object
• Protoyping

73. Object
• Protoyping
• JSON

74. Object
• Protoyping
• JSON
• Teaching

75. Object
• Protoyping
• JSON
• Teaching
• delete slots

76. Object Solution

77. Object Solution
• Don’t Use Object

78. Object Solution
• Don’t Use Object
• Ensure casts aren’t null

79. Object Solution
• Don’t Use Object
• Ensure casts aren’t null
• Same for Dynamic & Interface

80. Dictionary

81. Dictionary
• Easier lookups vs. ByteArray

82. Dictionary
• Easier lookups vs. ByteArray
• Strict Equality on Keys

83. Dictionary Solution

84. Dictionary Solution
• Wrap

85. Star

86. Star
•*

87. Star Solution

88. Star Solution
• Don’t Use It

89. Star Solution
• Don’t Use It
• Log It

90. Star Solution
• Don’t Use It
• Log It
• Ensure Consumers Guard

91. External Data

92. External Data
• Factories

93. External Data
• Factories
• Value Object / Data Transfer Object

94. External Data
• Factories
• Value Object / Data Transfer Object
• Parsing

95. Parsing

96. Parsing
• Poison Entire System

97. Parsing
• Poison Entire System
• When in doubt, return null

98. Parsing
• Poison Entire System
• When in doubt, return null
• Proactive: throw meaningful error

99. Parsing
• Poison Entire System
• When in doubt, return null
• Proactive: throw meaningful error
• Uber Proactive: Unit Test

100. Parsing

101. Parsing
• Holy S$*(%&: Null Pattern

102. Architecture

103. Architecture
• Encapsulation

104. Architecture
• Encapsulation
• Testability

105. Encapsulation

106. Encapsulation
• Black Box

107. Encapsulation
• Black Box
• Manages its own internal state

108. Bad Encapsulation

109. Bad Encapsulation
• Global Variables / Singletons

110. Bad Encapsulation
• Global Variables / Singletons
• No Accessors/API for Data Models

111. Bad Encapsulation
• Global Variables / Singletons
• No Accessors/API for Data Models
• No API so you dig

112. Testability

113. Testability
• Easy to test

114. Testability
• Easy to test
• not welded together

115. Testability
• Easy to test
• not welded together
• not spaghetti code

116. Services

117. Services
• Service Inside the Proxy

118. Services
• Service Inside the Proxy
• Not a service, just a loader

119. Services
• Service Inside the Proxy
• Not a service, just a loader
• No centralized error reporting

120. Service Solutions

121. Service Solutions
• Create a base class

122. Service Solutions
• Create a base class
• log all errors

123. Service Solutions
• Create a base class
• log all errors
• create an integration suite

124. Big Ole’ Commands

125. Big Ole’ Commands
• switch

126. Refactoring Paths

127. Refactoring Paths
• What do you build now?

128. Refactoring Paths
• What do you build now?
• What do you change to later?

129. Refactoring Paths
• What do you build now?
• What do you change to later?
• When?

130. Refactoring Paths
• What do you build now?
• What do you change to later?
• When?
• Not Architecting

131. Refactoring Path

132. Refactoring Path
Ability to code now, satisfy non-programmers
for trust earning, with assurance you haven’t
coded yourself into a corner.

133. Marriage

134. Marriage
Compromise

136. Good Book

137. It’s Ok. It’ll Be Ok.

138. It’s Ok. It’ll Be Ok.
• Lose some battles...

139. It’s Ok. It’ll Be Ok.
• Lose some battles...
• ...as long as you win the war.

140. Detractors

141. Detractors
• Don’t have their Poetic License

142. Detractors
• Don’t have their Poetic License
• Fear

143. Detractors
• Don’t have their Poetic License
• Fear
• Understand the Rules & Ramifications

144. Detractors

145. Detractors
• Ivory Zealots

146. Detractors
• Ivory Zealots
• Scars

147. Detractors
• Ivory Zealots
• Scars
• Don’t Believe in their Refactoring Ability

148. Detractors
• Ivory Zealots
• Scars
• Don’t Believe in their Refactoring Ability
• or Yours

149. Refactoring Paths

150. Refactoring Paths
• Refactoring is Temporal

151. Refactoring Paths
• Refactoring is Temporal
• Architecture is not

152. Refactoring Paths
• Refactoring is Temporal
• Architecture is not
• Architecture is Plan

153. Refactoring Paths
• Refactoring is Temporal
• Architecture is not
• Architecture is Plan
• Refactoring is a Strategy

154. Refactoring Path

155. Refactoring Path
• Know the rule(s) ur breaking

156. Refactoring Path
• Know the rule(s) ur breaking
• do it

157. Refactoring Path
• Know the rule(s) ur breaking
• do it
• document what needs to change

158. Refactoring Path
• Know the rule(s) ur breaking
• do it
• document what needs to change
• when you have time, fix it

159. Refactoring Paths

160. Refactoring Paths
• Use a *

161. Refactoring Paths
• Use a *
• Cast It

162. Refactoring Paths

163. Refactoring Paths
• Make an Object

164. Refactoring Paths
• Make an Object
• Make a ValueObject

165. Refactoring Path

166. Refactoring Path
• Event with public var data:*;

167. Refactoring Path

168. Refactoring Path
• Scouting

169. Refactoring Path
• Scouting
• Bear Bait

170. Refactoring Path
• Scouting
• Bear Bait
• Intentional Parsing Throws

171. Refactoring Path
• Scouting
• Bear Bait
• Intentional Parsing Throws
• Intentional Grenades

172. Refactoring Path

173. Refactoring Path
• if if if if if if

174. Refactoring Path
• if if if if if if
• then then then then

175. Refactoring Path
• if if if if if if
• then then then then
• badger badger badger badger

176. Refactoring Path
• if if if if if if
• then then then then
• badger badger badger badger
• make a switch

177. Refactoring Path
• if if if if if if
• then then then then
• badger badger badger badger
• make a switch
• make functions

178. Refactoring Paths

179. Refactoring Paths
• <s:Component> vs Item Renderer

180. Refactoring Paths
• <s:Component> vs Item Renderer
• Passive

181. Priority Pyramid

182. Priority Pyramid
1. Report

183. Priority Pyramid
1. Report
2. Understanding

184. Priority Pyramid
1. Report
2. Understanding
3. Trust

185. Priority Pyramid
1. Report
2. Understanding
3. Trust
4. Lead

186. Priority Pyramid

187. Priority Pyramid
5. Build

188. Priority Pyramid
5. Build
6. Explosions

189. Priority Pyramid
5. Build
6. Explosions
7. Diagnostics

190. Priority Pyramid
5. Build
6. Explosions
7. Diagnostics
8. Architecture

191. Priority Pyramid
5. Build
6. Explosions
7. Diagnostics
8. Architecture
9. Workflow

192. Pyramid: Report

193. Pyramid: Report
• Who is my boss?

194. Pyramid: Report
• Who is my boss?
• What will make you happy when I leave?

195. Pyramid: Understanding

196. Pyramid: Understanding
• Listen

197. Pyramid: Understanding
• Listen
• What’s the True Goal?

198. Pyramid: Understanding
• Listen
• What’s the True Goal?
• What are the problems?

199. Pyramid: Understanding
• Listen
• What’s the True Goal?
• What are the problems?
• What are the challenges?

200. Pyramid: Understanding

201. Pyramid: Understanding
• Explore & Document

202. Pyramid: Understanding
• Explore & Document
• Learn Data Model

203. Pyramid: Understanding
• Explore & Document
• Learn Data Model
• Learn Framework

204. Pyramid: Understanding
• Explore & Document
• Learn Data Model
• Learn Framework
• Understanding the Story

205. Pyramid: Understanding

206. Pyramid: Understanding
• Looking for Red Flags

207. Pyramid: Understanding
• Looking for Red Flags
• Looking for Mines

208. Pyramid: Understanding
• Looking for Red Flags
• Looking for Mines
• Looking for Validation

209. Pyramid: Understanding

210. Pyramid: Understanding
• Dissect People

211. Pyramid: Understanding
• Dissect People
• What makes them tick?

212. Pyramid: Understanding
• Dissect People
• What makes them tick?
• Who listens to who?

213. Pyramid: Trust

214. Pyramid: Trust
• Make Friends

215. Pyramid: Trust
• Make Friends
• Provide Immediate Value

216. Pyramid: Trust

217. Pyramid: Trust
• Check in code into source control 1st week

218. Pyramid: Trust
• Check in code into source control 1st week
• fix a problem

219. Pyramid: Trust
• Check in code into source control 1st week
• fix a problem
• Only get 1 change at 1st impression

220. Pyramid: Trust
• Check in code into source control 1st week
• fix a problem
• Only get 1 change at 1st impression
• Under Promise, Over Deliver

221. Pyramid: Trust

222. Pyramid: Trust
• Stop Fire Drills

223. Pyramid: Trust
• Stop Fire Drills
• Empower Through Diagnostic Tools

224. Pyramid: Trust
• Stop Fire Drills
• Empower Through Diagnostic Tools
• Easy to use, visible logger

225. Pyramid: Trust
• Stop Fire Drills
• Empower Through Diagnostic Tools
• Easy to use, visible logger
• Easy to use, visible environment info

226. Pyramid: Trust

227. Pyramid: Trust
• Update on Direction

228. Pyramid: Trust
• Update on Direction
• Provide Transparency

229. Pyramid: Trust
• Update on Direction
• Provide Transparency
• What, why, and when

230. Pyramid: Trust
• Update on Direction
• Provide Transparency
• What, why, and when
• Plan A, Plan B

231. Pyramid: Lead

232. Pyramid: Lead
• Be Positive

233. Pyramid: Lead
• Be Positive
• Short Term Goals

234. Pyramid: Lead
• Be Positive
• Short Term Goals
• Long Term Goals

235. Pyramid: Lead

236. Pyramid: Lead
• Plan

237. Pyramid: Lead
• Plan
• 1 thing at a time

238. Pyramid: Lead
• Plan
• 1 thing at a time
• Assess Problems

239. Pyramid: Lead
• Plan
• 1 thing at a time
• Assess Problems
• Document

240. Pyramid: Lead

241. Pyramid: Lead
• Re-prioritize as needed

242. Pyramid: Lead

243. Pyramid: Lead
• Delegate

244. Pyramid: Lead
• Delegate
• Help

245. Pyramid: Lead
• Delegate
• Help
• Divide & Conquer

246. Pyramid: Lead
• Delegate
• Help
• Divide & Conquer
• Short Term Branches: 3 days

247. Experiences

249. Hearts & Minds

251. Fight Only to Win

253. People on Pedestals

255. Idle Hands

256. Winston Wolfe
[show video]
[dissect]

257. Conclusions

258. Conclusions
• Exceptions: Catch & Log

259. Conclusions
• Exceptions: Catch & Log
• Refactoring: Remember The Paths

260. Conclusions
• Exceptions: Catch & Log
• Refactoring: Remember The Paths
• Listen, Build Trust, and Lead

261. Thank You! Questions?

262. Thank You! Questions?
Jesse Warden

263. Thank You! Questions?
Jesse Warden
webappsolution.com

264. Thank You! Questions?
Jesse Warden
webappsolution.com
jessewarden.com

265. Thank You! Questions?
Jesse Warden
webappsolution.com
jessewarden.com
@jesterxl