mcs/class/referencesource/System.ServiceModel/System/ServiceModel/Dispatcher/OperationInvokerBehavior.cs

   1 //-----------------------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //-----------------------------------------------------------------------------
   4
   5 namespace System.ServiceModel.Dispatcher
   6 {
   7     using System.Collections.Generic;
   8     using System.ServiceModel.Channels;
   9     using System.ServiceModel.Description;
  10
  11     class OperationInvokerBehavior : IOperationBehavior
  12     {
  13         public OperationInvokerBehavior()
  14         {
  15         }
  16
  17         void IOperationBehavior.Validate(OperationDescription description)
  18         {
  19         }
  20
  21         void IOperationBehavior.AddBindingParameters(OperationDescription description, BindingParameterCollection parameters)
  22         {
  23         }
  24
  25         void IOperationBehavior.ApplyDispatchBehavior(OperationDescription description, DispatchOperation dispatch)
  26         {
  27             if (dispatch == null)
  28             {
  29                 throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("dispatch");
  30             }
  31             if (description == null)
  32             {
  33                 throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("description");
  34             }
  35
  36             if (description.TaskMethod != null)
  37             {
  38                 dispatch.Invoker = new TaskMethodInvoker(description.TaskMethod, description.TaskTResult);
  39             }
  40             else if (description.SyncMethod != null)
  41             {
  42                 if (description.BeginMethod != null)
  43                 {
  44                     // both sync and async methods are present on the contract, check the preference
  45                     OperationBehaviorAttribute operationBehaviorAttribue = description.Behaviors.Find<OperationBehaviorAttribute>();
  46                     if ((operationBehaviorAttribue != null) && operationBehaviorAttribue.PreferAsyncInvocation)
  47                     {
  48                         dispatch.Invoker = new AsyncMethodInvoker(description.BeginMethod, description.EndMethod);
  49                     }
  50                     else
  51                     {
  52                         dispatch.Invoker = new SyncMethodInvoker(description.SyncMethod);
  53                     }
  54                 }
  55                 else
  56                 {
  57                     // only sync method is present on the contract
  58                     dispatch.Invoker = new SyncMethodInvoker(description.SyncMethod);
  59                 }
  60             }
  61             else
  62             {
  63                 if (description.BeginMethod != null)
  64                 {
  65                     // only async method is present on the contract
  66                     dispatch.Invoker = new AsyncMethodInvoker(description.BeginMethod, description.EndMethod);
  67                 }
  68             }
  69         }
  70
  71         void IOperationBehavior.ApplyClientBehavior(OperationDescription description, ClientOperation proxy)
  72         {
  73         }
  74     }
  75 }