Modern application architecture – options and tradeoffs

transcript

AgileWithoutDogma.com

Modern Application Architecture

Options and Tradeoffs

Objective

Understand how modern software solutions are designed so we can focus our efforts on career choices that will enable us

to be successful in a challenging 21st century economy

Agenda

• History of web applications• Modern architecture• Web 2.0• Deep dive with discussion:

– Forgot Password– Paging– Weather.com

• How to be successful in the 21st century job market

History of Web Applications

• Early applications were page based with hyperlinks

• HTTP is stateless for performance reasons• Stateless nature places challenges on non-

trivial applications

Simple Page Based Request / Response

Browser Web Server

Request

Response

We Need State

Browser Web Server

Request

Response

Cookies State

Modern Architecture

DatabaseLets start with the database

Modern Architecture

Database

Business Layer

Data Layer

Modern Architecture

Database

Business Layer

Data Layer

Presentation Layer

Web Based

ver Desktop (Generic)

Desktop (Specific)

Mobile (Generic)

Mobile (Specific)

Applets

r Windows

IPhone

Android

Back to Modern Architecture

Database

Business Layer

Data Layer

Presentation Layer

Modern Architecture

Database

Business Layer

Data Layer

Presentation Layer

Browser

Mobile A

Mobile B

Applet A

Applet B

Modern Architecture

Database

Business Layer

Data Layer

Presentation Layer

Browser

Mobile A

Mobile B

Applet A

Applet B

Desktop

IPhone Browser

Blackberry Browser

Blackberry Applet

IPhone Applet

Web 2.0

Browser Web Server

Cookies State

Deep Dive

• Forgot Password• Paging• Weather.com

Challenges

• The global middle class will triple by 2030• Hundreds of millions of smart people will

compete for a limited and ever changing set of high paying jobs

• The lucrative job of this decade will not be the lucrative job of the next

• It is easy to become complacent

How to be successful

• Do what you love• Build a network• Start your savings today so you can be financially

independent (Retire)• Save one years worth of expenses• Adjust you standard of living• Goal – Have job offers come your way when you do not

need them• Understand that your learning starts the day you graduate,

it does not end

Useful Resources• The Cost Of Waiting - demonstrates the cost of waiting to save for

retirement• JoelOnSoftware.com - blog on all things software• OcambOnConsulting.com – My Blog• NeverEat Alone – Book on Networking• Agilewithoutdogma.com – my new Wiki about Agile in the real world• Mountaingoatsoftware.com - reference on Scrum and Agile by Mike

Cohn• RandsInRepose.com - light hearted and irreverent look and working

with people• Scrum in 10 Minutes – Fast paced introduction of Scrum

Modern application architecture – options and tradeoffs

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