sdk/samples/all in on code/Visual Studio 2010/CSWF4ServiceHostFactory/ReadMe.txt

   1 =============================================================================
   2         WF4/WCF APPLICATION : CSWF4ServiceHostFactory
   3 =============================================================================
   4 /////////////////////////////////////////////////////////////////////////////
   5 Use:
   6
   7 By using WorkflowServiceHost class, we can create a WF4 service host in code.
   8 The advantage of using WorkflowServiceHost is that we can add our own workflow
   9 extensions, tracking participant and persistence store.
  10
  11 So question is: can we use our own WorkflowServiceHost in IIS7 like we did in
  12 the console application? This sample is for answering this question.
  13
  14 To run the sample:
  15 1. Open CSWF4ServiceHostFactory.sln with Visual Studio 2010
  16 2. Press Ctrl+F5.
  17
  18
  19 /////////////////////////////////////////////////////////////////////////////
  20 Prerequisite
  21
  22 1. Visual Studio 2010
  23 2. .NET Framework 4.0
  24 3. Sql Server
  25
  26
  27 /////////////////////////////////////////////////////////////////////////////
  28 Creation:
  29
  30 1.Create a Workflow Service project named CSWF4ServiceHostFactory.
  31 2.Add assembly references to:
  32   System.Workflow.Runtime
  33   System.Workflow.Activities
  34   System.ServiceModel.Activation
  35   System.Configuration
  36   System.Activities.DurableInstancing
  37   System.Runtime.DurableInstancing
  38 3.Setup WF4 sql persistence store.
  39   http://msdn.microsoft.com/en-us/library/ee395773.aspx
  40   name the persistence database:WF4PersistenceDB.
  41 4.add the following configuration to web.config file right under <configuration> node.
  42         <appSettings>
  43            <add key="SqlWF4PersistenceConnectionString"
  44                         value="Data Source=.\sqlexpress;Initial Catalog=WF4PersistenceDB;Integrated Security=True" />
  45         </appSettings>
  46 5.Create a code file named MyServiceHostFactory.cs
  47         using System;
  48         using System.Collections.Generic;
  49         using System.Workflow.Activities;
  50         using System.Activities;
  51         using System.Workflow.Runtime;
  52         using System.ServiceModel.Activities.Activation;
  53         using System.ServiceModel.Activities;
  54         using System.ServiceModel.Description;
  55         using System.Activities.DurableInstancing;
  56         using System.Configuration;
  57
  58         namespace CSWF4ServiceHostFactory
  59         {
  60                 public class MyServiceHostFactory :
  61                                 System.ServiceModel.Activities.Activation.WorkflowServiceHostFactory
  62                 {
  63                         protected override WorkflowServiceHost CreateWorkflowServiceHost(WorkflowService service,
  64                                                                                                                                                          Uri[] baseAddresses)
  65                         {
  66                                 WorkflowServiceHost host =
  67                                         base.CreateWorkflowServiceHost(service, baseAddresses);
  68                                 string connectionString =
  69                                         ConfigurationManager.AppSettings["SqlWF4PersistenceConnectionString"].ToString();
  70                                 SqlWorkflowInstanceStore instanceStore =
  71                                         new SqlWorkflowInstanceStore(connectionString);
  72                                 instanceStore.InstanceCompletionAction =
  73                                         InstanceCompletionAction.DeleteNothing;
  74                                 host.DurableInstancingOptions.InstanceStore = instanceStore;
  75                                 return host;
  76                         }
  77                 }
  78         }
  79
  80 6.Open web.config file and add a ServiceHostingEnvironment node under the
  81   System.serviceModel.
  82         <serviceHostingEnvironment multipleSiteBindingsEnabled="true">
  83                 <serviceActivations>
  84                         <add relativeAddress="~/Service1.xamlx"
  85                                                 service="Service1.xamlx"
  86                                                 factory="CSWF4ServiceHostFactory.MyServiceHostFactory"/>
  87                 </serviceActivations>
  88         </serviceHostingEnvironment>
  89 7.Open the default created Service1.xaml, select SendResponse activity
  90   check its PersistBeforeSend property.
  91 8.Build the project and then create a IIS7 WebSite(Framework 4.0), map the physical path
  92   to the project path.
  93   Note: To prevent that the default Application Pool identity have no permission to access the
  94   Web.config file and database, you can try shift the identity to LocalSystem.
  95 9.Call Service1.xamlx. you can call it in WcfTestClient.exe.（usually, you can
  96   find WcfTestClient.exe in C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE）
  97
  98
  99 /////////////////////////////////////////////////////////////////////////////
 100 Reference:
 101
 102 http://xhinker.com/post/WF4Create-Your-Own-ServiceHostFactory.aspx