My talk on Superfying your team with (remote) pair programming at #AgileIndia2014 with Niruka Ruhunage

1. Remote Pair
Programming
Agile India 2014
Johannes Brodwall
Exilesoft Chief scientist
@jhannes

2. How can a distributed team
still collaborate
closely?

3. team
collaborate well?
How can a

4. But first

5. But first – a
competition:

6. Competition:
Find the blue sentence

7. This talk is a talk
for you if you…

8. You work in a team, but...

9. Your team doesn’t
feel like a team

10. Your distributed team doesn’t
feel like a team

11. After this talk you
will…

12. Be motivated to start using pair
programming, possibly remotely

13. Have seen remote pair
programming

14. Know how to get started

15. Who is using pair
programming as their
preferred approach?

16. 1. What is a super team
2. Building a super
team with pairing
3. Getting the benefits
4. Summary

17. Part I

18. What is a super
team?

19. Sharing the burden

23. Rabbit
hole!

24. Shared
context

25. Sharing
experience

26. Whops!
No!

28. Working
baseline

30. “That’s
strange…”

31. “Eureka!”

32. 20 minutes fix
(where 10 was
waiting)

33. Problem
solved

34. The sad team

35. Planning
Johannes: You’ll
create CRUD SOAP
service for projects
with applications
Okay
Backend dev
“Scrum”
Johannes
“Master”

36. Planning
How long will it take?
Um…
Backend dev
“Scrum”
Johannes
“Master”

37. Planning
Backend dev
2
Backend dev
“Scrum”
Johannes
“Master”
It’s pretty
easy with
Hibernate
Okay, 8 hours for
each of Create…
then
!

38. Stand-up
Today, I will work on
Create Project
Backend dev
Database dev
Scrum master
Johannes
Designer
Frontend dev

39. Stand-up
No impediments
Backend dev
Database dev
Scrum master
Johannes
Designer
Frontend dev

40. Behold – the uber
coder

41. Exception!
org.hibernate.PropertyValueException: not-null property references a null or transient value:
....common.entities.Application._applicationsBackref
org.hibernate.engine.Nullability.checkNullability(Nullability.java:95)
org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:313)
org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204)
org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:130)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEvent
Listener.java:210)
org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)

42. Exception
Poke
Google
Deploy
Stack
overflow
Tweak

43. Exception
Poke
Google
Deploy
Stack
overflow
Tweak

44. Exception
Poke
Google
Deploy
Stack
overflow
Tweak

45. Exception
Poke
Google
Deploy
Stack
overflow
Tweak

46. Stand-up
Yesterday, I worked
on Create Project
Backend dev
Database dev
Scrum master
Johannes
Designer
Frontend dev

47. Stand-up
Today, I will
hopefully fix the
exception and also
do Delete Project
Backend dev
Database dev
Scrum master
Johannes
Designer
Frontend dev

48. Stand-up
No impediments
Backend dev
Database dev
Scrum master
Johannes
Designer
Frontend dev

49. Stand-up
How could
they help
anyway
Backend dev
Database dev
Scrum master
Johannes
Designer
Frontend dev

51. Behold – the uber
coder

52. Exception!
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is
org.hibernate.ObjectDeletedException: deleted object would be re-saved by cascade (remove deleted object from
associations): [Person[id=22]]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:927)
at org.springframework.web.servlet.FrameworkServlet.doDelete(FrameworkServlet.java:844)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:653)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:796)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at
org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:152)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.web.multipart.support.MultipartFilter.doFilterInternal(MultipartFilter.java:119)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at filter.NoCacheFilter.doFilter(NoCacheFilter.java:102)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

54. Stand-up
Yesterday, I finally
finished Delete after
3 days of «coding»
I didn’t need the
Delete service
Backend dev
Database dev
Scrum master
Johannes
Designer
Frontend dev

55. Stand-up
Yesterday, I finally
finished Delete after
3 days of «coding»
I didn’t need the
Delete service
Backend dev
Database dev
Scrum master
Johannes
Designer
Frontend dev

56. STOP

57. Imagine you should carry
10 pieces of timber
Each is 3 meters and 30
kg

58. The fun team

59. Stand-up
I’m ready for a new task.
What’s on the board..
Johannes
Scrum master
Johannes

60. Stand-up
«Let’s users administrate
their projects»
Johannes
Scrum master
Johannes

61. Stand-up
I haven’t done any
Hibernate tasks before.
Who can I pair with?
Scrum master
Johannes
Johannes
I can work together
with you

63. Exception!
org.hibernate.PropertyValueException: not-null property references a null or transient value:
....common.entities.Application._applicationsBackref
org.hibernate.engine.Nullability.checkNullability(Nullability.java:95)
org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:313)
org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204)
org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:130)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEvent
Listener.java:210)
org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)

64. That link doesn’t really
seem relevant.
Are we getting anywhere?
Time to ask for help?

65. I think Niluka has worked
on this sort of thing before

66. Yeah, just look at the
Person HasMany Roles
mapping
Niluka

67. That’s it!
High five!

68. The difference

69. Everyone works everywhere
Knowledge is disseminated
You’re never alone

70. Part II

71. Superfying
with
Pair programming

72. Pair programming
styles

73. Debate club
“No, this variable should be called
fooNumber, not fooNum”,
“But it’s a common abbreviation”

74. Dedicated driver
“I’ll write the parser”
“I’ll design the algorithm”

75. Driver-navigator
“I don’t know how to solve this, so
I’ll sit at the keyboard”

76. Ping-pong

77. Ingredient #1:
Pair programming

80. Ingredient #2:
Test driven
development

81. Failing test
Write code
Failing test
Write code
Failing test

82. Ingredient #3:
Refactoring

83. Failing test
Write code
Refactor code
and tests
Failing test
Write code
Refactor code
and tests
Failing test

84. Put together

85. Failing test
Write code
Failing test
Write code
Failing test

86. Failing test
Write code
Refactor code
and tests
Failing test
Write code
Refactor code
and tests
Failing test

87. Failing test
Write code
Refactor code
and tests
Failing test
Write code
Refactor code
and tests
Failing test

88. Demonstration
(Guest starring
Niruka Ruhunage)

89. Kata: Number to text

90. Kata: Number to text
8192 => eight thousand one hundred and ninety two
125,017 =>
one hundred and twenty five thousand and seventeen

91. What does it feel
like?

92. Part III

93. From here to there

94. Make sharing into a
goal

95. Johannes
Thomas
Chintaka
Arunas
Dileepa
Sergey

96. Johannes
Thomas
Chintaka
Arunas
Dileepa
Sergey

97. Arunas
Add new company
✓
Display contacts on
map
✓
Dileepa
✓
Chinthaka
✓
Store password
securely
✓
✓
✓
Authenticate user by
company
Sergey
✓
✓
Filter contacts in list
Usernames with
Norwegian letters are
rejected
Johannes
Thomas
✓
✓
✓
✓
✓
✓
✓
✓

98. Arunas
Add new company
✓
Display contacts on
map
✓
Dileepa
✓
Chinthaka
✓
Store password
securely
✓
✓
✓
Authenticate user by
company
Sergey
✓
✓
Filter contacts in list
Usernames with
Norwegian letters are
rejected
Johannes
Thomas
✓
✓
✓
✓
✓
✓
✓
✓

99. Arunas
Add new company
✓
Display contacts on
map
✓
Dileepa
✓
Chinthaka
✓
Store password
securely
✓
✓
✓
Authenticate user by
company
Sergey
✓
✓
Filter contacts in list
Usernames with
Norwegian letters are
rejected
Johannes
Thomas
✓
✓
✓
✓
✓
✓
✓
✓

100. Overcoming
obstacles

101. JIRA

102. With a true team, no
member owns more
than their current task

103. TODO
DOING
WAITING
AWAY
DONE

104. You will get more done
(But not in the first or
second sprint)

105. Distance

106. •
•
•
See each other
Share what we see
Share our work

107. •
•
•
Skype (or any voice sharing)
GoToMeeting (or flexible screen
sharing)
Dropbox (or any file sharing)

108. Skill and tact

109. • Experiment with switching
patterns
• Try out ping-pong
• “Could we try it this way
first?”

110. Expect exhaustion

111. When

112. Bug fix

113. Training event

115. Practice with kata

116. 1.
2.
3.
4.
Create a dropbox account
Share a folder with a friend
Put a coding project there
Create a screen share
session
5. Call up your friend

117. Failing test
Write code
Refactor code
and tests
Failing test
Write code
Refactor code
and tests
Failing test

118. Set a time per week

119. Don’t wait to find
the perfect tool

120. Just do it

121. Conclusion

122. What

123. •
•
•
Two people at one codebase
No member owns a task
beyond the day
Team rotates pairing

124. Why

125. •
•
•
•
•
•
•
Less Overproduction (unused functions in API)
Less Waiting (for the only person who knows X)
Less Motion (as everyone gets more skilled)
Fewer Defects (as two pair of eyes see better)
Less Over-processing (from double responsibility)
Less Inventory (as team works more focused)
Less Transportation (handoffs inside a story)

126. How

127. •
•
•
Ask for help – don’t work
alone
Play with ping pong
programming for two hours
Be open, share and listen

128. Competition:
What was the blue sentence?

129. A team creates
together what no
member could do
alone

130. Next week: Commit
to two hours of
working together

131. Thank you
jbr@exilesoft.com
nru@exilesoft.com
http://JohannesBrodwall.com
http://exilesoft.com
http://twitter.com/jhannes