Yazılım Geliştirme ama gerçek dünyada

Gündemimiz •Development Methodologies •Agile Software Development •Project Management •DevOps (Developer Operations) •Extreme Programming •Important Extreme Programming Techniques

Waterfall •Winston W. Royce (1970) •Sequential •Originated from Manufacturing and Construction •Didn’t Work as Winston suggested http://en.wikipedia.org/wiki/Waterfall_model

Waterfall

Waterfall http://3.bp.blogspot.com/_ks0a9nZwy_4/S81GVxOsNaI/AAAAAAAAA00/daRVEi5IK_U/s1600/Waterfall_SDLC.jpg

Result http://fc09.deviantart.net/fs71/i/2012/190/9/4/francella_meme___oh_god_just_kill_me_right_now_by_foreverzerodragon-d56mytj.jpg

RUP http://en.wikipedia.org/wiki/IBM_Rational_Unified_Process •IBM Rapid Unified Process •Invented by Rational Software •Multiple Phases with Iterations •Didn’t Work as planned •I actually haven’t seen anything created by IBM that worked

RUP http://upload.wikimedia.org/wikipedia/commons/0/05/Development-iterative.gif

RUP http://3.bp.blogspot.com/-EMH91oMv15U/T98YsaTM8hI/AAAAAAAACwc/hiIkrrfdCcM/s1600/5733303422_9b03ce1258_z.jpg

Agile Software Development •Is it any different? Really? •Who is behind it? •It’s not TDD, nor Continuous Integration, nor XP

Agile Software Development http://www.people10.com/sites/default/files/imce/People10-Agile-Delivery-Approach-new.png

Agile Manifesto •Individuals and interactions over processes and tools •Working software over comprehensive documentation •Customer collaboration over contract negotiation •Responding to change over following a plan http://agilemanifesto.org/

Principles •Our highest priority is to satisfy the customer through early and continuous delivery of valuable software •Welcome changing requirements, even late in development. Agile processes harness change for the customer's competitive advantage •Deliver working software frequently, from a couple of weeks to a couple of months, with a preference to the shorter timescale http://agilemanifesto.org/principles.html

Principles http://www.commonplaces.com/sites/commonplaces.com/files/agile_method-01.png Mini Waterfalls

Principles •Business people and developers must work together daily throughout the project •Build projects around motivated individuals. Give them the environment and support they need, and trust them to get the job done •The most efficient and effective method of conveying information to and within a development team is face- to-face conversation http://agilemanifesto.org/principles.html

Principles •Working software is the primary measure of progress •Agile processes promote sustainable development. The sponsors, developers, and users should be able to maintain a constant pace indefinitely •Continuous attention to technical excellence and good design enhances agility •Simplicity--the art of maximizing the amount of work not done--is essential http://agilemanifesto.org/principles.html

Principles •The best architectures, requirements, and designs emerge from self-organizing teams •At regular intervals, the team reflects on how to become more effective, then tunes and adjusts its behavior accordingly http://agilemanifesto.org/principles.html

PM Implementations •Infamous Scrum •Kanban •Lean •Others (Scrum-ban, etc)

DevOps •It’s all about Continuous Delivery •Working Software •Collaboration of People •Convergence of Processes •Creation and Exploitation of Tools

Extreme Programming •Agile without XP has no meaning •It’s a culture and discipline •Requires passionate developers •Some practices overlaps with Agile principles

Extreme Programming •Continuous Build, Continuous Integration, Continuous Deployment, Continuous Delivery •TDD, TFD, BDD, ATDD •Pair Programming, Code Reviews, Peer Reviews •Incremental Design, Evolutionary Architecture •User Stories, Information Dashboards, Iterative Development, Ten-Minute Build, etc..

Continuous what? •Continuous Build •Continuous Integration •Continuous Deployment •Continuous Delivery

Testing in XP •What are these terms? TDD, TFD, BDD, ATDD.. •Different Tests •Unit and Integration Tests •Functional and Acceptance Tests •Regression and Smoke Tests •Performance and Load Tests

Test-Driven Design •Opps, Test-Driven Development? •How do you want to use the code you develop? •Tests are side-effects •Legacy-Code and TDD?

Test-Driven Design

Pair Programming •You are not that SMART? Trust me! •No seriously, you are not that SMART!!! •Knowledge Sharing and Indispensable team members •Navigator and Driver •Ping-Pong •Remote Pairing?

What About Architecture •SOLID Principles •Single Responsibility •Open/Close •Liskov •Interface Segregation •Dependency Injection (Inversion of Controls) http://butunclebob.com/ArticleS.UncleBob.PrinciplesOfOod

What About Architecture •DRY •YAGNI •Tell Don’t Ask •And Good Citizen

Good Citizen •Keep consistent state all times •No static fields •Never expect or return null •Fail fast •Constructor or method delegations •Prefer immutability http://picocontainer.codehaus.org/patterns.html

Zen of Python

Q/A