Extreme Collaboration TODO Good pairings Johannes Brodwall Seniorsenior

Extreme Collaboration TODO: Good pairings: Johannes Brodwall Senior/senior: Ping-pong Respectful senior/senior: Stategist/tactician Exilesoft Chief scientist Junior/junior: Timer Junior/senior: Driver/trainer – optimize @jhannes learning Junior/senior: Co-pilot/pilot – optimize progress

team collaborate well? How can a

This talk is for you if you…

You work in a team, but. . .

Your team doesn’t feel like a team

XP: Collective code ownership Pair programming Whole team Sustainable pace

Defining pair programming

Two people working on the same files

Who has tried pair programming?

Positive experiences

Negative experiences

Why no more?

After this talk

Commit to try

1. A sad team 2. A super team 3. Getting to great

Part I

The sad team

Planning Johannes: You’ll create CRUD SOAP service for projects with applications Okay Backend dev “Scrum” Johannes “Master” m a e t d a s e Th

Planning How long will it take? Um… Backend dev “Scrum” Johannes “Master” m a e t d a s e Th

Planning Backend dev 2 It’s pretty easy with Hibernate Backend dev “Scrum” Johannes “Master” Okay, 8 hours for each of Create… then ! m a e t d a s e Th

Stand-up Today, I will work on Create Project Backend dev Database dev Designer Frontend dev m a e t d a s e Th Scrum Johannes master

Stand-up No impediments Backend dev Database dev Designer Frontend dev m a e t d a s e Th Scrum Johannes master

Behold – the uber coder m a e t d a s e Th

Exception! org. hibernate. Property. Value. Exception: not-null property references a null or transient value: . . common. entities. Application. _applications. Backref org. hibernate. engine. Nullability. check. Nullability(Nullability. java: 95) org. hibernate. event. def. Abstract. Save. Event. Listener. perform. Save. Or. Replicate(Abstract. Save. Event. Listener. java: 313) org. hibernate. event. def. Abstract. Save. Event. Listener. perform. Save(Abstract. Save. Event. Listener. java: 204) org. hibernate. event. def. Abstract. Save. Event. Listener. save. With. Generated. Id(Abstract. Save. Event. Listener. java: 130) org. hibernate. event. def. Default. Save. Or. Update. Event. Listener. save. With. Generated. Or. Requested. Id(Default. Save. Or. Update. Event Listener. java: 210) org. hibernate. event. def. Default. Save. Event. Listener. save. With. Generated. Or. Requested. Id(Default. Save. Event. Listener. java: 56) org. hibernate. event. def. Default. Save. Or. Update. Event. Listener. entity. Is. Transient(Default. Save. Or. Update. Event. Listener. java: 195) org. hibernate. event. def. Default. Save. Event. Listener. perform. Save. Or. Update(Default. Save. Event. Listener. java: 50) org. hibernate. event. def. Default. Save. Or. Update. Event. Listener. on. Save. Or. Update(Default. Save. Or. Update. Event. Listener. java: 93) m a e t d a s e Th

Exception Poke Google Deploy Stack overflow Tweak m a e t d a s e Th

Stand-up Yesterday, I worked on Create Project Backend dev Database dev Designer Frontend dev m a e t d a s e Th Scrum Johannes master

Stand-up Today, I will hopefully fix the exception and also do Delete Project Backend dev Database dev Designer Frontend dev m a e t d a s e Th Scrum Johannes master

Stand-up No impediments Backend dev Database dev Designer Frontend dev m a e t d a s e Th Scrum Johannes master

Stand-up How could they help anway Backend dev Database dev Designer Frontend dev m a e t d a s e Th Scrum Johannes master

m a e t d a s e Th

Behold – the uber coder m a e t d a s e Th

m a e t d a s e Th

Stand-up Yesterday, I finally finished Delete after 3 days of «coding» I didn’t need the Delete service Backend dev Database dev Designer Frontend dev m a e t d a s e Th Scrum Johannes master

STOP m a e t d a s e Th

Imagine you should carry 10 wooden beams Each is 3 meters and 30 kg

Part II

The fun team

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

Stand-up «Basic submit leave request» Johannes

Stand-up Johannes Hiran We haven’t worked together yet this week

Exception! org. hibernate. Property. Value. Exception: not-null property references a null or transient value: . . common. entities. Application. _applications. Backref org. hibernate. engine. Nullability. check. Nullability(Nullability. java: 95) org. hibernate. event. def. Abstract. Save. Event. Listener. perform. Save. Or. Replicate(Abstract. Save. Event. Listener. java: 313) org. hibernate. event. def. Abstract. Save. Event. Listener. perform. Save(Abstract. Save. Event. Listener. java: 204) org. hibernate. event. def. Abstract. Save. Event. Listener. save. With. Generated. Id(Abstract. Save. Event. Listener. java: 130) org. hibernate. event. def. Default. Save. Or. Update. Event. Listener. save. With. Generated. Or. Requested. Id(Default. Save. Or. Update. Event Listener. java: 210) org. hibernate. event. def. Default. Save. Event. Listener. save. With. Generated. Or. Requested. Id(Default. Save. Event. Listener. java: 56) org. hibernate. event. def. Default. Save. Or. Update. Event. Listener. entity. Is. Transient(Default. Save. Or. Update. Event. Listener. java: 195) org. hibernate. event. def. Default. Save. Event. Listener. perform. Save. Or. Update(Default. Save. Event. Listener. java: 50) org. hibernate. event. def. Default. Save. Or. Update. Event. Listener. on. Save. Or. Update(Default. Save. Or. Update. Event. Listener. java: 93) m a e t d a s e Th

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

I think Manoj has worked on this sort of thing before

Yeah, just look at the Person mapping file Manoj

That’s it! High five!

The difference

Everyone works everywhere

Everyone works everywhere You get help with tech you don’t know

Everyone works everywhere You’re not blocked

Everyone works everywhere Integration becomes easier

Knowledge spreads

You don’t get stuck

You don’t get stuck Wrong path is stopped by pair

You don’t get stuck Silly mistakes spotted by pair

Your job as a pair

“Are we focusing on the goal”

“Did you notice …? ”

“Is there a better way? ”

“Are we working as the team agreed? ”

Part II

Superfying with Pair programming

Make sharing into a goal

Johannes Thomas Chintaka Arunas Dileepa Sergey ? t s r o w g n i t Who is ac

Johannes Arunas Dileepa Thomas Chintaka Wh Sergey ? t s e b g n i t c a o is

Johannes Thomas Chintaka Arunas Dileepa Sergey

Arunas Add new company ✓ Display contacts on map Filter contacts in list Authenticate user by company ✓ Store password securely ✓ Usernames with Norwegian letters are rejected Johannes ✓ Dileepa ✓ Chinthaka Sergey ✓ ✓ ✓ s i k s a t h c ? i s h u W o i c i p s u s Thomas ✓ ✓ ✓

Arunas Add new company ✓ Display contacts on map Filter contacts in list Authenticate user by company ✓ Johannes ✓ Dileepa Chinthaka ✓ ✓ ✓ ✓ Sergey ✓ ✓ ✓ s i r e ✓ b m e m m ? Usernames with a t e s t o h Norwegian letters are m c i rejected Wh elping h Store password securely Thomas ✓ ✓ ✓

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

Task assignment

TODO Hiran DOING Johannes Hiran DONE Hiran Johannes Sankalpa Waruni Sankalpa Waruni Milina Waruni Sankalpa Milina Hiran

TODO DOING WAITING AWAY DONE

TODO DOING WAITING A r e p R I k n s i J a a t r d b d e r n e n g p i i r s a s AWAY t a a m v e r in O Onne a. Nevbera DONE

You will get more done (But not next sprint)

PS: It’s not only for developers

Getting there

Practice with kata

Failing test Write code Refactor code and tests Failing test

Ping-pong

Fun events

Try an experiment

Try an experiment Pair 2 hours per day for a week

Expect exhaustion

Expect exhaustion For the first month

Conclusion

What

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

Why

• Working solo limits your vision of the code base and the problem

• • 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)

How

• • • Create a pair programming circle Practice pairing Commit to pairing 2 hours per day for a week

Do you accept the challenge? Pair for 2 hours per day for a week

Your job as a pair • • “Are we focusing on the goal? ” “Did you notice …? ” “Is there a better way? ” “Are we working in the way the team agreed? ”

Tools and tricks • Pair programming circle • Knowledge matrix • Floating assignments • Expect exhaustion

Thank you jbr@exilesoft. com http: //Johannes. Brodwall. com http: //exilesoft. com http: //twitter. com/jhannes

I want your feedback: How likely are you to recommend this session to a coworker on a scale from 1 (lowest) to 10 (highest)? Optional: What's the reason for your number?