Windows 8 applications with Azure

backendsMihai TataranGeneral Manager, AvaelgoMicrosoft Most Valuable Professional

Objectives

• Understand the basic principles to develop a Windows 8 application, with an Windows Azure (Mobile Services) backend

Agenda

• Modern UI applications• HTML5, WinJS, Controls• Windows 8 Platform• Windows Azure introduction• Windows Azure Mobile Services

HTML 5 and Javascript• HTML5• Indexed DB• App Cache• Web Workers• Canvas• SVG• FormData

• CSS3 animations & transitions

• XHR• FileAPI• Web Sockets• Geolocation• PostMessage

Modern UI apps

• Only the HTML5 DOCTYPE• Single window• All the device’s screen• Access to Windows Runtime

Modern UI apps: runtimeC:\Program Files\ Applications\...

HTML

CSS

JavaScript

Resources

Manifest App Container

HTML Host Process

App Code

App p

ack

age

Runnin

g a

pp

WinJS

• The library for Modern UI style apps• Matches the Windows Modern UI design style• Designed for touch as well as traditional input• Scales across form factors

UI Controls• Designed for touch, mouse, keyboard

• Everyday widgets

• Text editing

• Scrolling content

• Presenting data

• Commanding surfaces

Process states

Running Suspendedsuspending

Terminated

Low memory

Core runs

No code runs

No process

resuming

App has 5s to work after suspend

message App is not notified when

terminated

App is notified when resumed

Applaunch

Splash screen Code runs

Suspend state• No CPU, Disk or Network consumed• All threads are suspended• Apps remain in memory• Apps instantly resumed from suspend when brought

to foreground

• Exception: Background tasks

Termination

• System needs more memory• User switch occurs• System shutdown• Apps crash

• Application is not notified

Saving state

• sessionState in WinJS•Windows.Storage.ApplicationData to save application state

Saving / restoring state

Scenario You should….User is using your App Save user data incrementally

App switched away from (Suspending)

Save where the user is – what screen they are on, for example

Not running App launched by user (Activated)

Bring the user back and restore their session as if they never left

Suspended App launched by user (Resuming)

Do nothing

Charms

• Some kind of Start Bar• Ideal manner to use device’s settings• Or any other app specific settings

Share contracts

• Predefined contracts in Metro

Source App Target AppData Package

Demo

• Win 8 Apps

Agenda

• Modern UI applications• HTML5, WinJS, Controls• Windows 8 Platform• Windows Azure introduction• Windows Azure Mobile Services

Windows Azure introduction

• The cloud platform offered by Microsoft• Infrastructure as a Service• Platform as a Service• Run websites and applications in the cloud• Run (backend) web services in the cloud

• Storage: tables, blobs, etc.• SQL Database

What is Windows Azure Mobile Services?

Data

Notifications

Auth

Server Logic

Scale

Logging

Diagnostics

Demo

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