Agile2011-Agile Education by Object Game

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Agile Education
by Object Game

Tsuyoshi Ushio

www.takumi-businessplace.co.jp

Tsuyoshi Ushio
v  Consultant, Samurai of Agile
v  Agile, OO, Business Analysis , Project Manager
v  2001 - 2005 Agile Programmer, PM , Join Community(XP-Jug in Japan)
v  2003 Agile2003, wrote OO/Agile Best Seller Book in Japan
v  2006 - 2009 Consultant
v  2009 CEO of SimpleArchitect
v  2011 Established E-Agility(Community)
v  Vocalist of Za Michael.


The mean of “HISSATSU”

Mondo Nakamura

HISSATSU

Osaka no Obachan
Samurai Term.

If you use HISSATSU technique, you’ll always kill the enemy.

Extremely effective.
http://jitekichi.blog26.fc2.com/blog-entry-872.html
http://ansaikuropedia.org/wiki/ _


Agenda
v  Why Object-oriented needed for agile? (20 min)
v  How to obtain Object Brains with Object Game?(60min)
v  Reflect of the Object Game(10min)
v  Appendix


Why Object Oriented is needed for Agile?

Embrace Change!

Evolutionary Design
TDD, Refactoring

Continuous Integration
Object Oriented
Iteration
Mechanism

But , some people never understand it.
Communication

:


Why some people couldn’t understand OO?

v No Time
v Fear of OO
v Threshold


Learning carve of Object Oriented

Skill
Awareness
Object Brain
Join OO Project

First BIG
Awareness of OO

Learners can’t feel
progress before Threshold
First BIG
Awareness

Time

Obtain Object Brains!

What is Object Brain?

v Learner can imagine Behavior and Role
of OO
v Learner can grab OO concepts and
implementations
v Learner can feel the merit of OO
v A-Ha!

Object Game is the solution!

A-Ha

Learner can feel
“Oh! Finally I’ve got an object oriented brain!”


Object Game

v Simple and effective
v Goal is to understand real Application.
v If you understand that’s overview of role
and behavior, stage cleared. No details.
v No Cording
v Has been created since 2006

Just do it!


Game Process

How to play Object Game

Prepare a pencil, eraser and real app.
By default, A person
per a card
Place the cards But allow to have
multi cards.

Take a part of a card
Execute real
applications.
Execute the program
If you don’t
understand it, repeat
Execute the scenarios by object game It 3times.
Listen to the
Compare the result explanation and
Feel the concept.

Copyright(C) 2009 Takumi Business Place Corporation All Rights Reserved.

First Step
Scenario
This is the “Command the Singer” program.
This program has a Manager class to command
he singer.

Setting and parts
Place the cards
Screen

Person B
Person A
Person C
Take a part of cards

Java
Manager
Singer
Execute it


First Step Cards

Java Screen

Execute the class what name of the first parameter

Manager Singer
Person Role
Manager Role Manage “name” data
execute Manage “height” data name
instantiate Programmer and give it to the data Sleep
height
“name = “Michael”, height = 5.5” Display “(name) is
sleeping.”
Eat
Display “(name) is
sleeping.”


HISSATSU example to obtain Object Brain!
v  Experience Polymorphism, instantiate,
behavior, inheritance and encapsulation.
v  Experience “exception”.
v  Experience “change”.
v  Learner can feel real application.
v  and OOP Merits.

This example cover these!


President commands “stand up!”

Situation
Brand new Employee , Tommy
Mid-Level Employee, Michael
Experienced Employee, Steve
will stand up.
President realize Stand up
All of them are Employees.
that the man is his
employee.

Stand up but it has different style.
Brand new Employee : Just Stand up
Mid-Level Employee : Quickly Standup
Experienced Employee : Slowly Standup

President
Waiting room


President command “Stand up!” Step1
Scenario
Let’s understand this Application

No such a level of an employee.

Position and Role Person C
Employee Factory
Screen

Person A
Person B

Java
President
Employee

Person D

BradNewEmploye MidLevelEmploye ExperiencedEmpl
e(Employee)
e(Employee)
oyee(Employee)


> java President new 100
Scenario A brand new employee just stands up!
Add a new function Employee's salary is 100yen.
>java President mid 100
Brand New Employee A mid-level employee quickly stands up!
salary = base Salary.
Mid-Level Employee
Employee's salary is 201yen.
salary = base Salary x 2 + 1 > java President exp 100
Experienced Employee
salary = base Salary x 3
A experienced employee slowly stands up!

Position and Role Person C
Employee Factory
Screen

Person A
Person B

Java
President
Employee

Person D

BradNewEmploye MidLevelEmploye ExperiencedEmpl
e(Employee)
e(Employee)
oyee(Employee)


Scenario A brand new employee just stands up!
Quiz How to add this
function? >java President mid 100
A mid-level employee quickly stands up!

Brand New Employee >java President exp 100
salary = base Salary. A experienced employee slowly stands up!
Mid-Level Employee Employee's salary is 300yen.
salary = base Salary x 2 + 1
Experienced Employee
salary = base Salary x 3 >java President snr 100
Senior-Level Employee A senior-level employee wearily stands up!

Position and Role


Scenario A brand new employee just stands up!Employee's
salary is 100yen.
This is it.
>java President mid 100
A mid-level employee quickly stands up!Employee's
Brand New Employee
salary is 201yen.
salary = base Salary.
Mid-Level Employee >java President exp 100
salary = base Salary x 2 + 1 A experienced employee slowly stands up!
Experienced Employee Employee's salary is 300yen.
salary = base Salary x 3
Senior-Level Employee
>java President snr 100
A senior-level employee wearily stands up!
Employee’s salary is 402yen.

Position and Role
Employee Factory
Screen

Java
President
Employee

BradNewEmploye MidLevelEmploye ExperiencedEmpl Senior-Level
e(Employee)
e(Employee)
oyee(Employee)
Employee(Employee)


Scenario >java President new 100 >java President exp 100
A brand new employee just stands up! A experienced employee slowly stands up!
Add function Employee‘s salary is 100yen. Employee's salary is 300yen.
Employee’s Bonus is 300yen. Employee’s Bonus is 300yen.
Calculate bonus
>java President mid 100 >java President snr 100
A mid-level employee quickly stands up! A senior-level employee wearily stands up!
Employee's salary is 201yen. Employee’s salary is 402yen.
Employee’s Bonus is 300yen. Employee’s Bonus is 300yen.

Position and Role
Employee Factory
Screen

Java
President
Employee

BradNewEmploye MidLevelEmploye ExperiencedEmpl Senior-Level
e(Employee)
e(Employee)
oyee(Employee)
Employee(Employee)


Point of making Object Brain

v Experience and Explain
v Observe them
v Don’t be too strict.(like baby learning)


Results of the Object Game

v Learner can easily understand OO based
technique
v Can experience and feel OO and patterns.
v Can understand an architecture.
v No coding and Fast!

http://store.shopping.yahoo.co.jp/sincere-inc/shuriken.html


Do you understand it? nd e
nd it
rsta e
v
an u on’t ha
sc yd
ner g.
Lear n if the of codin
Eve rience
<XML> <XML>
expe

struts-config.xml
web.xml
Request from browser
Table 
http://localhost:8080/sample/LoginAction.do
Tomcat user_id :Yoda
user_name:Tomoo
Login Form
password sennuki
Login
Controller
User
user  
pass
User
login
Action
Service
login.jsp
User
DAO
menu 
.jsp LoginAction
Hello!  ViewAction
User table
Tomoo!

Object
Game Learners can understand it in 4 hours.


Results of the Object Game

v Learner can easily understand OO based
technique
v Can experience and feel OO and patterns.
v Can understand an architecture.
v No coding and Fast!
v Learner thinks “finally, I can handle the
Object Oriented!”


Side Effects Story

Gain Motivation!

Reduce Fear!

I can handle it!
I can understand!

Side Effects
Learner gets
Object Brain


Thanks for enjoying this session!

If you want to get an object brain, please talk to me after this session.
I’ll do this method for you in this conference.

Tsuyoshi Ushio ( )
Twitter :@sandayuu
E-mail : ushio@simplearchitect.com


The rule of the Object Game.

APPENDIX


Unit of program

Class

Small piece of a program. Represented by a card in this game.

Divided by Responsibility

Template of instance
Just Experience It!

A class is a collection of objects. Class Name

Ex. Product, Order, etc… Person Attribute

Responsibility of Represent Person name
class
Manage “name” data height
Manage “height” data
sleep
Display “(name) is Class Role
sleeping.”
eat
behavior


Rule

Instantiate(new)

Before you ask a work to class, make instance from class.

Instance Card

Class Card
1:Person

Person Person Role
Manage “name” data name
Michael
Manage “height” data
Person Role height
5.11
Sleep Unique number
name
Display “(name) is (Address)
Manage “name” data
sleeping.”
Manage “height” data height
Sleep Eat 2:Person
sleeping.”
Eat
Person Role
name
Stevie
Manage “height” data height
6.00
Sleep
sleeping.”

Non Class Card
Runtime, Configuration File, others.

Runtime , screen , configuration files .. become cards.

Name of Application

Execute the first attribute name’s class.
Screen

Michael is sleeping.
Behavior

Write it by pencil.


Message Patterns
v Send Message
q No parameter pattern
Tap the card owner’s shoulder
Stand up!

Point your own card.


Message Patterns

v Send Message
q With parameters
Give me a Employee!
This is an experienced
Order the job with Post-it. Employee, OK?


Message Patterns
v Send Message
q With an Instance
Pass the person with
card.

Pass the card

Order with passing the card. Order with passing the person.


Inheritance
Ex. Brand new Employee, Mid-Level Employee and Experienced Employee Are an Employee

Interface Employee
Abstract class
Or Class
Represent an
Employee

You can write abstract method. standup
Manage
“baseSalary”
GetSalary
Shows Is-a releation

BrandNewEmployee Employee MidLevelEmployee(Employee) ExperiencedEmployee(Employee)
Represent a brand new Represent a mid-level Represent an experienced
Employee Employee Employee
standup standup standup

getSalary
getSalary getSalary
You don’t need to write
Superclass method in
the concrete class methods

NOTICE: This example is not a good model for OO-Modeling. See Baby Learning Section.


Polymorphism image Mr.B

President
Employee
EmployeeFactory
Point the cards

Mr.C
Mrs.A BrandNew Emp
Mid Emp
Exp Emp

Instantiate
Instantiate Mid-Level Employee

Return Mid-Level Employee ( Employee )
Mr.C hide Mid-Level Employee card from
Others and point the Employee card.
Mr.B returns Mr.C with cards to Mrs.A
Mrs.A realize Mr.C as an Employee.

Mrs.A dosen’t realize Mr.C as
a mid-level employee.


Exception

Object Game can represent the exceptions.
Just throw and catch it!

Pass the Exception card

If card has not
Role to catch it,
throw it to caller

Throw the
Exception Exception
Exception

Java
President
EmployeeFactory

Catch the Exception

Java can catch it. President has
Process the no role to catch it
Exception!


Rule

References

employees belongs to a division.

2:Employee
1:Division
3:Employee
Division Role name
Stevie
employees
2
3
Manage “code” data Manage “sales” data
Employee sales
Role 1,000,000
code
name
Stevie
SL01 Manage “name” data
add(Employee) Manage “sales” data sales
name
1,000,000
sales
calcTotalSalary


Thanks a lot!


Agile2011-Agile Education by Object Game

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