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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Activities / Executors / InboundActivityHelper.cs / 1305376 / InboundActivityHelper.cs
#region Using directives using System; using System.Diagnostics; using System.Collections.Generic; using System.Text; using System.Reflection; using System.Runtime.Remoting; using System.Runtime.Remoting.Messaging; using System.Workflow.Runtime.Hosting; using System.Workflow.ComponentModel; using System.Workflow.Runtime; #endregion namespace System.Workflow.Activities { internal static class InboundActivityHelper { internal static ActivityExecutionStatus ExecuteForActivity(HandleExternalEventActivity activity, ActivityExecutionContext context, Type interfaceType, string operation, out object[] args) { WorkflowQueuingService queueSvcs = (WorkflowQueuingService)context.GetService(typeof(WorkflowQueuingService)); args = null; IComparable queueName = CorrelationService.ResolveQueueName(activity, interfaceType, operation); if (queueName != null) { WorkflowQueue queue; object message = DequeueMessage(queueName, queueSvcs,activity, out queue); CorrelationService.UninitializeFollowers(interfaceType, operation, queue); if (message != null) { args = ProcessEvent(activity, context, message, interfaceType, operation); return ActivityExecutionStatus.Closed; } } return ActivityExecutionStatus.Executing; } internal static object DequeueMessage(IComparable queueId, WorkflowQueuingService queueSvcs, Activity activity, out WorkflowQueue queue) { object message = null; queue = queueSvcs.GetWorkflowQueue(queueId); if (queue.Count != 0) { message = queue.Dequeue(); if (message == null) throw new ArgumentException(SR.GetString(SR.Error_InvalidEventMessage, activity.QualifiedName)); } return message; } private static object[] ProcessEvent(HandleExternalEventActivity activity, ActivityExecutionContext context, object msg, Type interfaceType, string operation) { IMethodMessage message = msg as IMethodMessage; if (message == null) { Exception excp = msg as Exception; if (excp != null) throw excp; throw new InvalidOperationException(SR.GetString(SR.Error_InvalidLocalServiceMessage)); } CorrelationService.InvalidateCorrelationToken(activity, interfaceType, operation, message.Args); IdentityContextData identityData = (IdentityContextData)message.LogicalCallContext.GetData(IdentityContextData.IdentityContext); ValidateRoles(activity, identityData.Identity); if (ProcessEventParameters(activity.ParameterBindings, message, interfaceType, operation)) return message.Args; return null; } private static bool ProcessEventParameters(WorkflowParameterBindingCollection parameters, IMethodMessage message, Type interfaceType, string operation) { bool isKnownSignature = false; if (parameters == null) return isKnownSignature; EventInfo eventInfo = interfaceType.GetEvent(operation); MethodInfo methodInfo = eventInfo.EventHandlerType.GetMethod("Invoke"); int index = 0; foreach (ParameterInfo formalParameter in methodInfo.GetParameters()) { if ((typeof(ExternalDataEventArgs).IsAssignableFrom(formalParameter.ParameterType))) { if (index == 1) isKnownSignature = true; } if (parameters.Contains(formalParameter.Name)) { WorkflowParameterBinding binding = parameters[formalParameter.Name]; binding.Value = message.Args[index]; } index++; } return isKnownSignature; } internal static void ValidateRoles(Activity activity, string identity) { DependencyProperty dependencyProperty = DependencyProperty.FromName("Roles", activity.GetType().BaseType); if (dependencyProperty == null) dependencyProperty = DependencyProperty.FromName("Roles", activity.GetType()); if (dependencyProperty == null) return; ActivityBind rolesBind = activity.GetBinding(dependencyProperty) as ActivityBind; if (rolesBind == null) return; WorkflowRoleCollection roles = rolesBind.GetRuntimeValue(activity) as WorkflowRoleCollection; if (roles == null) return; if (!roles.IncludesIdentity(identity)) throw new WorkflowAuthorizationException(activity.Name, identity); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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