Windows Workflow Foundation Mike Taulty Developer & Platform Group Microsoft Ltd

Intro: WinFX

What’s WinFX? Managed API for the Windows platform Extends the.NET Framework V2.0 First ships at the time of Windows Vista (2006) Included in Windows Vista Available on Windows XP Sp 2 and Server 2003 Following a Community Technology Preview Cycle Latest is the February CTP

WinFX Themes WinFX

Intro: Windows Workflow Foundation

Windows Workflow Foundation Single framework for Workflow on Windows Extensible Both human and system Workflow Supports long-running and stateful Workflows

Activies – Workflow Building Blocks Activities are classes Basic Activities or Composite Activities A workflow is a composite activity public string SourceFile; public string DestFile; override Execute() { File.Copy(SourceFile, DestFile); }

Styles of Workflow

The Workflow Framework (or “What’s in the box?”) RuntimeDesigner Base Activities Runtime Services

Framework: Workflow Runtime

Demo Framework: Hosting the Runtime

Framework: Workflow Designer Hosted in Visual Studio 2005 Hosted in your application for end-users Supports theming in both VS and non-VS environments

Demo Framework: Using/Hosting the Designer

Framework: Base Activity Library Pre-built set of building block activities CompositeBasic

Demo Framework: Using the Base Activity Library

Framework: Runtime Services Runtime uses services PersistenceSchedulingTrackingTransactions Defaults in the box for most services Pluggable – add your own

Demo Framework: Plugging in Runtime Services

Building Activities

Activities: Component Model Activity is at the centre of a component model

Activities: Lifecycle Activities have a lifecycle

Demo Activities: Building custom activities

Other things to know about…

Host/Workflow Communication ILoanNotify { GetLoanApproval(); event LoanApproved; } class Notifier : ILoanNotify { }

Demo Host/Workflow Communication

State Machine Workflows State Start Wait for X Wait for Y Wait for Z State Wait for A Wait for B Terminate Activity Transition

Demo State Machine Workflows

Applying Rule-Based Policies Data Policy (RuleSet) Rule: If PRICE then Rule: If … then Priority: 1 Priority: 2 Priority: 3 Priority: 4 Priority: 5 Price: 200 Change

Demo Rule based policies

Transaction Scope Book Flight Working with Transactions Transaction Scope Book Hotel Error! Commit happens here Compensation Cancel Hotel

Demo Working with Transactions

Modifying Running Instances Running Workflow instance can be modified Logic changed Activities added/removed Runtime managed Change

Demo Modifying Workflow Instances

Resources MSDN Developer Centre Windows Workflow Site UK Community Resources MSDN Nugget Videos topics

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