Nuno Godinho
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apresentação do Nuno Godinho no evento RIAPT de dia 16 de Janeiro.
Transcript of Nuno Godinho
Agenda
Introduction
Recommended Pattern
Communications
Beyond the Browser
Extensibility
Q&A
About Me
Nuno Filipe Godinho
Independent Consultant
Mail: [email protected]
Blogs: http://pontonetpt.com/blogs/nunogodinho
http://xamlpt.com/blogs/nunogodinho
http://weblogs.asp.net/nunogodinho
http://msmvps.org/blogs/nunogodinho
Twitter: @NunoGodinho
Agenda
Introduction
Recommended Pattern
Communications
Beyond the Browser
Extensibility
Q&A
IntroductionProblem Statement
Problems◦ N-Tier
◦ Controls
◦ Rich Text Support
◦ Multi-language Support
◦ Customer Devices Interaction
◦ Communications
◦ Extensibility
◦ Offline Support
◦ Interoperability
IntroductionChallenges using N-Tier applications
LoB applications use data that needs to flow across tiers
Created and used through basic CRUD operations
In an internet application, there is a trust boundary between the client and the mid-tier server
Important to have a well defined and secured resources that are available to the client tier and also what operations are permitted
IntroductionChallenges using N-Tier applications
The validation needs to run on Client and On Server as well as on Mid-Tiers
Common validation across the tiers
Services that may be shared with other applications
IntroductionVision and Goals
Simplify RIA-style application development◦ n-tier is hard, and un-natural
◦ Focus on data-driven apps
Bring ASP.NET-style productivity to RIA development◦ Building blocks for data, security, etc.
◦ Focus on scenarios
IntroductionValue Propositions
Focus on data in an end-to-end manner
A unified story for client and server development
A prescriptive framework that targets key scenarios, and leads the common developer to a pit of success
IntroductionValue Propositions
Simplify application development across tiers and trust boundary ◦ Provides a set of tools to build the multiple tiers of an application
together
◦ Application logic remains aware of tier and trust boundaries
◦ Uses the end-to-end flow of data and metadata described earlier
◦ Code generation and shared code
Enhance the experience by providing multiple choices for sharing logic while respecting tier and trust boundaries
ApplicationBrowserRich Internet Application
DB
Service
Other Applications
IntroductionA Unified Story for Client and Server
Client is an extension of the server
A single logical application
Data Access
Layer
App
Logic
Services
HTMLPresentation
LogicNetwork
IntrodutionValue Propositions
Define and support a pattern for exposing a set of operations on resources
DomainService◦ Define a set of operations on resources
Framework and Tools◦ Collaborate to generate code for a corresponding client-tier
◦ Services for authentication and user settings can be used out-of-the box
IntroductionA Prescriptive Pattern
Rich Internet Application
DB
Services
Data Access
Layer
App
Logic
Presentation
LogicNetwork
Domain
Context
Domain
Service
Under the covers infrastructure
IntroductionA Single Pattern that Scales and Grows
Support for multiple presentation tiers and data access technologies
App
Logic
Databases
ADO.NET,
ORMs (LTS, EF, …)
CLR
Lists/Objects
Repository
(nHibernate, …)
Services
REST/SOAP
(Azure, …)SOAP,
XML,
JSON,
Binary
.NET Clients
Silverlight, WPF
Standards
Clients
JavaScript
Server
Rendering
HTML, SEO,
Printing, …
Services
WCF
Unit Test
Code
Line-of-Business Application
Agenda
Introduction
Recommended Pattern
Communications
Beyond the Browser
Extensibility
Q&A
Recommended Pattern
Recommended PatternMVVM
Why?◦ Separation of concerns
◦ Better Workflow between Developer and Designer
◦ Easier Testability
Why not MVC?◦ We need to have access to the Code-Behind and MVC doesn’t support
that, only Code-Behind Pattern does, but doesn’t delivers easy separation of concerns
Recommended PatternMVVM
Display data in Controls
UI Friendly Entities, UI State, Actions
Entities representing data
MVVM Implementation in Silverlight
Agenda
Introduction
Recommended Pattern
Communications
Beyond the Browser
Extensibility
Q&A
Interopwith other
Platforms & WS-*
ASMX & WSE
Attribute-Based
Programming
Enterprise Services
REST / HTTP Programming
HTTP Services
Message-Oriented
Programming
System.Messaging
ExtensibilityLocation
transparency
.NET Remoting
CommunicationUnified Programming Model
CommunicationsWindows Communication Foundation (WCF)
CommunicationsWCF RIA Services
Framework, tools and services with prescriptive pattern for n-tier applications
Data
Access
Layer
(DAL)
App
Logic
Database
View
Web
Service
App
Logic
Trust
Boundary
Client project
CommunicationsWCF RIA Services
Design-time view
Server project
Domain
Service
Data
Access
Layer
(DAL)
Entities
Solution (Application)
Views
Domain
Context
EntitiesBuild, reflect
& code-gen
Silverlight
CommunicationsRun-time view (entity lifecycle)
Web server
Domain
Service
Data
Access
Layer
(DAL)
Application
ViewsDomain
Context
LoadQuery
Entities
Results
Submit
Entities
Submit
Results
CommunicationsServices
Authentication
Roles
User profile
All integrate w/ ASP.NET infrastructure
WCF RIA Services
Agenda
Introduction
Recommended Pattern
Communications
Beyond the Browser
Extensibility
Q&A
Beyond the Browser
Out-of-Browser Applications
Trusted Applications
Beyond the BrowserOut-of-Browser – Already on Silverlight 3
Configuration Based
AppManifest.xml
Can be enabled in an existing application without rebuilding
Install option on its right-click menu
Can run without a network connection
You can implement network detection and provide offline
support when a connection is unavailable
Beyond the BrowserOut-of-Browser
Windowing API
WebBrowser control
HtmlBrush
Notification (aka. Toast)
Beyond the BrowserTrusted Applications
OOB with elevated privileges
COM Interop in Windows
File system access
Cross-domain networking access
Full keyboard support in Full-Screen Mode
Beyond the Browser
Agenda
Introduction
Recommended Pattern
Communications
Beyond the Browser
Extensibility
Q&A
Extensibility
Prism v2
MEF – Managed Extensibility Framework
ExtensibilityPrism v2
Prism is a set of options
Use what you want and ignore the rest◦ Example:
Choose Modules and Commanding, but ignore Event Aggregation and Regions
ExtensibilityPrism v2
Prism Technical Concepts
ExtensibilityMEF – Managed Extensibility Framework
A new library in Silverlight 4 for building applications that can be incrementally
extended.
ExtensibilityMEF – Managed Extensibility Framework
An Application is built of parts.
ExtensibilityMEF – Managed Extensibility Framework
Export it.
Import it.
Compose it.
ExtensibilityMEF – Managed Extensibility Framework
Export it - Metadata
Widget1
[ExportMetadata(“Location”,Location.Top)][Export(typeof(UserControl))]public class Widget1 : UserControl{
public string Message {get{return(string) Button.Content;}
set{Button.Content=value;}}
}
Export
ExtensibilityMEF – Managed Extensibility Framework
Import it - Metadata
MainPage
[Export(typeof(UserControl))]public class MainPage: UserControl{
[ImportMany(typeof(UserControl))]public IEnumerable<Lazy<UserControl, IWidgetMetadata> {
get;set;}
}
ImportMany
MEF – Managed Extensibility Framework
Agenda
Introduction
Recommended Pattern
Communications
Beyond the Browser
Extensibility
Q&A
