WorkflowOperationInvoker.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx35 / System.WorkflowServices / System / ServiceModel / Dispatcher / WorkflowOperationInvoker.cs / 1305376 / WorkflowOperationInvoker.cs
                        
                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------
namespace System.ServiceModel.Dispatcher
{ 
    using System.Diagnostics;
    using System.Reflection; 
    using System.Runtime; 
    using System.Security;
    using System.ServiceModel.Channels; 
    using System.ServiceModel.Description;
    using System.ServiceModel.Diagnostics;
    using System.Workflow.Runtime;
 
    class WorkflowOperationInvoker : IOperationInvoker
    { 
        static object[] emptyObjectArray = new object[0]; 
        bool canCreateInstance;
        DispatchRuntime dispatchRuntime; 
        int inParameterCount;
        bool isOneWay;
        OperationDescription operationDescription;
        ServiceAuthorizationManager serviceAuthorizationManager; 
        string staticQueueName;
        MethodInfo syncMethod; 
        WorkflowInstanceLifetimeManagerExtension workflowInstanceLifeTimeManager; 
        WorkflowRuntime workflowRuntime;
 
        public WorkflowOperationInvoker(OperationDescription operationDescription, WorkflowOperationBehavior workflowOperationBehavior,
            WorkflowRuntime workflowRuntime, DispatchRuntime dispatchRuntime)
        {
            if (operationDescription == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("operationDescription"); 
            } 

            if (workflowRuntime == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("workflowRuntime");
            }
 
            if (workflowOperationBehavior == null)
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("workflowOperationBehavior"); 
            }
 
            this.isOneWay = operationDescription.IsOneWay;

            if (operationDescription.BeginMethod != null)
            { 
                this.syncMethod = operationDescription.BeginMethod;
                inParameterCount = GetFlowedInParameterCount(operationDescription.BeginMethod.GetParameters()) - 2; 
            } 
            else
            { 
                this.syncMethod = operationDescription.SyncMethod;
                inParameterCount = GetFlowedInParameterCount(operationDescription.SyncMethod.GetParameters());
            }
 
            this.operationDescription = operationDescription;
            this.workflowRuntime = workflowRuntime; 
            this.canCreateInstance = workflowOperationBehavior.CanCreateInstance; 
            this.serviceAuthorizationManager = workflowOperationBehavior.ServiceAuthorizationManager;
            this.dispatchRuntime = dispatchRuntime; 
            staticQueueName = QueueNameHelper.Create(this.syncMethod.DeclaringType, operationDescription.Name);
        }

        public bool CanCreateInstance 
        {
            get { return this.canCreateInstance; } 
        } 

        public DispatchRuntime DispatchRuntime 
        {
            get { return this.dispatchRuntime; }
        }
 
        public WorkflowInstanceLifetimeManagerExtension InstanceLifetimeManager
        { 
            get 
            {
                if (this.workflowInstanceLifeTimeManager == null) 
                {
                    this.workflowInstanceLifeTimeManager = this.dispatchRuntime.ChannelDispatcher.Host.Extensions.Find();
                }
 
                return this.workflowInstanceLifeTimeManager;
            } 
        } 

        public bool IsOneWay 
        {
            get { return this.isOneWay; }
        }
 
        public bool IsSynchronous
        { 
            get { return false; } 
        }
 
        public string StaticQueueName
        {
            get { return this.staticQueueName; }
        } 

        public object[] AllocateInputs() 
        { 
            if (inParameterCount == 0)
            { 
                return emptyObjectArray;
            }
            return new object[inParameterCount];
        } 

        public object Invoke(object instance, object[] inputs, out object[] outputs) 
        { 
            throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotImplementedException());
        } 

        public IAsyncResult InvokeBegin(object instance, object[] inputs, AsyncCallback callback, object state)
        {
            long beginTime = 0; 

            if (PerformanceCounters.PerformanceCountersEnabled) 
            { 
                PerformanceCounters.MethodCalled(this.operationDescription.Name);
 
                try
                {
                    if (UnsafeNativeMethods.QueryPerformanceCounter(out beginTime) == 0)
                    { 
                        beginTime = -1;
                    } 
                } 
                catch (SecurityException exception)
                { 
                    if (DiagnosticUtility.ShouldTraceWarning)
                    {
                        DiagnosticUtility.ExceptionUtility.TraceHandledException(exception, TraceEventType.Warning);
                    } 
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SecurityException(SR.GetString("PartialTrustPerformanceCountersNotEnabled"), exception));
                } 
            } 

            Authorize(); 

            WorkflowDurableInstance durableInstance = (WorkflowDurableInstance) instance;

            Fx.Assert(durableInstance.CurrentOperationInvocation == null, 
                "At the time WorkflowOperationInvoker.InvokeBegin is called, the WorkflowDurableInstance.CurrentOperationInvocation is expected to be null given the ConcurrencyMode.Single.");
 
            durableInstance.CurrentOperationInvocation = new WorkflowOperationAsyncResult( 
                this,
                durableInstance, 
                inputs,
                callback,
                state,
                beginTime); 

            return durableInstance.CurrentOperationInvocation; 
        } 

        public object InvokeEnd(object instance, out object[] outputs, IAsyncResult result) 
        {
            bool methodThrewException = false;

            if (result == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("result"); 
            } 

            WorkflowDurableInstance durableInstance = (WorkflowDurableInstance) instance; 
            WorkflowOperationAsyncResult asyncResult = (WorkflowOperationAsyncResult) result;

            Fx.Assert(durableInstance.CurrentOperationInvocation != null,
                "At the time WorkflowOperationInvoker.InvokeEnd is called, the WorkflowDurableInstance.CurrentOperationInvocation is expected to be present."); 

            try 
            { 
                return WorkflowOperationAsyncResult.End(asyncResult, out outputs);
            } 
            catch (FaultException)
            {
                methodThrewException = true;
                if (PerformanceCounters.PerformanceCountersEnabled) 
                {
                    PerformanceCounters.MethodReturnedFault(this.operationDescription.Name); 
                } 
                throw;
            } 
            catch (Exception e)
            {
                methodThrewException = true;
 
                if (Fx.IsFatal(e))
                { 
                    throw; 
                }
 
                if (PerformanceCounters.PerformanceCountersEnabled)
                {
                    PerformanceCounters.MethodReturnedError(this.operationDescription.Name);
                } 
                throw;
            } 
            finally 
            {
                durableInstance.CurrentOperationInvocation = null; 

                if (!methodThrewException)
                {
                    if (PerformanceCounters.PerformanceCountersEnabled) 
                    {
                        long currentTime = 0; 
                        long duration = 0; 

                        if ((asyncResult.BeginTime >= 0) && (UnsafeNativeMethods.QueryPerformanceCounter(out currentTime) != 0)) 
                        {
                            duration = currentTime - asyncResult.BeginTime;
                        }
                        PerformanceCounters.MethodReturnedSuccess(this.operationDescription.Name, duration); 
                    }
                } 
            } 
        }
 
        static int GetFlowedInParameterCount(System.Reflection.ParameterInfo[] parameterInfos)
        {
            int inputCount = 0;
 
            foreach (System.Reflection.ParameterInfo parameterInfo in parameterInfos)
            { 
                if (parameterInfo.IsOut) 
                {
                    if (parameterInfo.IsIn) 
                    {
                        ++inputCount;
                    }
                } 
                else
                { 
                    ++inputCount; 
                }
            } 
            return inputCount;
        }

        void Authorize() 
        {
            Fx.Assert(OperationContext.Current != null, "Not in service dispatch thread"); 
 
            if (this.serviceAuthorizationManager != null)
            { 
                if (!this.serviceAuthorizationManager.CheckAccess(OperationContext.Current))
                {
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(AuthorizationBehavior.CreateAccessDeniedFaultException());
                } 
            }
        } 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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WorkflowOperationInvoker.cs source code in C# .NET

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