打造真正的软件

Make Software Soft-- Learn from A Refactoring Case赵喜鸿

Who am I?From Alcatel-LucentSoftware developerA fervent advocate of Agile methodologies11 years experience in software development and team managementNow, refactoring a legacy telecom equipment system.

Why call it “Software”?

Soft• yielding readily to touch or pressure; easily penetrated, divided, or changed in shape; not hard or stiff• Easily molded, cut, or worked.• Easy to influence or impose upon Easy to change

Is Software Soft?

Is Software Soft?http://www.codeproject.com/KB/books/SoftwareProjectSecrets1.aspx

Is Software Soft?http://gtwebmarque.com/wikis/gtwm/index.php/Project_Failure

“Reasons”and “Solutions”

Contract

Insufficient Upfront Design

More Upfront Design

Design Reality

A Real Refactoring Case

Understand Problem Domain

Epon Management

Run On NT Board On LT Board Is it soft?

Make It Softer

Update op state Save to databaseConfiguration Config to hardware Changed

Observer Pattern

Listener “state” Listener “persist”Configuration Listener Listener “HWW” “HWW” New Listener

PonDataData- State Config Fault PM HWWBase

PonDataData- State Config Fault PM HWWBase NtPonLine LtPonLine

xxxDataData- State Config Fault PM HWWBase xxxLine Config State xxxData Data- Fault Base

New Line Object Fault State xxxData PM Config Data- Base

New Line Object Fault State xxxData PM Config Data- Base Open to change?

config a line Context Retrieve PM PM Config Line Object Role

Fault Handling Context Retrieve PM ContextRetrieve State ContextRetrieveLine Context ConfigLine Context

DCI ArchitectureData What the system isContext The Context is the class (or its instance) whose code includes the roles for a given algorithm, scenario, or use case, as well as the code to map these roles into objects at run time and to enact the use case.Interaction The Interaction is "what the system does." The Interaction is implemented as Roles which are played by objects at run time http://www.artima.com/articles/dci_vision.html

EponMgr Pon Ont Llid Uni Is It Soft? Service

What is the essence of the problem?

EponMgr Managed Object Pon Ont Llid Uni Service Relation

ManagedObject ManagedObject Relation

Box Board Line Service

Domain ModelBox Board Line ServiceManagedObject ManagedObject

SoftSoftware

What Missed Domain Model Soft Bricks Software Refactoring Framework

道法自然Tao follows nature

Summary

The only thing constant is change

Cope with Changes bymaking software soft

Heart of making software soft is Discovering the “Tao”

The way to discover “Tao” is refactoring

“Tao” is the heart of making software SOFTPeople are the brain to find the heart

Thank YouContact: xihong.zhao@gmail.com Weibo: http://weibo.com/zhaoxihong

Questions?

打造真正的软件

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