Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Workflow.Activities/LocalService/CorrelationResolver.cs

@@ -0,0 +1,463 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+#region Using directives
+
+using System;
+using System.Diagnostics;
+using System.Collections.Generic;
+using System.Text;
+using System.Reflection;
+using System.Runtime.Serialization;
+using System.Workflow.ComponentModel;
+using System.Runtime.Remoting;
+using System.Runtime.Remoting.Messaging;
+using System.Workflow.Runtime;
+using System.Xml;
+
+#endregion
+
+namespace System.Workflow.Activities
+{
+    internal static class CorrelationResolver
+    {
+        static Dictionary<Type, CorrelationMethodResolver> cachedTypeResolver = new Dictionary<Type, CorrelationMethodResolver>();
+        static object mutex = new object();
+
+        internal static bool IsInitializingMember(Type interfaceType, string memberName, object[] methodArgs)
+        {
+            if (interfaceType == null)
+                throw new ArgumentNullException("interfaceType");
+            if (memberName == null)
+                throw new ArgumentNullException("memberName");
+            if (memberName.Length == 0)
+                throw new ArgumentException(SR.GetString(SR.Error_EventNameMissing));
+
+            ICorrelationProvider correlationProvider = CorrelationResolver.GetCorrelationProvider(interfaceType);
+            return correlationProvider.IsInitializingMember(interfaceType, memberName, methodArgs);
+        }
+
+        internal static ICollection<CorrelationProperty> ResolveCorrelationValues(Type interfaceType, string eventName, object[] eventArgs, bool provideInitializerTokens)
+        {
+            if (interfaceType == null)
+                throw new ArgumentNullException("interfaceType");
+            if (eventName == null)
+                throw new ArgumentNullException("eventName");
+            if (eventName.Length == 0)
+                throw new ArgumentException(SR.GetString(SR.Error_EventNameMissing));
+
+            ICorrelationProvider correlationProvider = CorrelationResolver.GetCorrelationProvider(interfaceType);
+            return correlationProvider.ResolveCorrelationPropertyValues(interfaceType, eventName, eventArgs, provideInitializerTokens);
+        }
+
+        internal static ICorrelationProvider GetCorrelationProvider(Type interfaceType)
+        {
+            CorrelationMethodResolver resolver = GetResolver(interfaceType);
+            return resolver.CorrelationProvider;
+        }
+
+        private static CorrelationMethodResolver GetResolver(Type interfaceType)
+        {
+            CorrelationMethodResolver resolver = null;
+            cachedTypeResolver.TryGetValue(interfaceType, out resolver);
+            if (resolver == null)
+            {
+                lock (mutex)
+                {
+                    cachedTypeResolver.TryGetValue(interfaceType, out resolver);
+                    if (resolver == null)
+                    {
+                        resolver = new CorrelationMethodResolver(interfaceType);
+                        cachedTypeResolver.Add(interfaceType, resolver);
+                    }
+                }
+            }
+            return resolver;
+        }
+    }
+
+    internal sealed class CorrelationMethodResolver
+    {
+        Type interfaceType;
+
+        // a correlation provider for each interface type
+        ICorrelationProvider correlationProvider;
+        object corrProviderSync = new object();
+
+        internal CorrelationMethodResolver(Type interfaceType)
+        {
+            this.interfaceType = interfaceType;
+        }
+
+        internal ICorrelationProvider CorrelationProvider
+        {
+            get
+            {
+                if (this.correlationProvider == null)
+                {
+                    lock (this.corrProviderSync)
+                    {
+                        if (this.correlationProvider == null)
+                        {
+                            ICorrelationProvider provider = null;
+                            object[] corrProviderAttribs = this.interfaceType.GetCustomAttributes(typeof(CorrelationProviderAttribute), true);
+                            if (corrProviderAttribs.Length == 0)
+                            {
+                                corrProviderAttribs = this.interfaceType.GetCustomAttributes(typeof(ExternalDataExchangeAttribute), true);
+                                object[] corrParameterAttribs = this.interfaceType.GetCustomAttributes(typeof(CorrelationParameterAttribute), true);
+                                if (corrProviderAttribs.Length != 0 && corrParameterAttribs.Length != 0)
+                                {
+                                    // no provider specified but it is a data exchange correlation service 
+                                    // hence use our default correlation
+                                    provider = new DefaultCorrelationProvider(this.interfaceType);
+                                }
+                                else
+                                {
+                                    // opaque interface with no correlation
+                                    provider = new NonCorrelatedProvider();
+                                }
+                            }
+                            else
+                            {
+                                CorrelationProviderAttribute cpattrib = corrProviderAttribs[0] as CorrelationProviderAttribute;
+                                Type providerType = cpattrib.CorrelationProviderType;
+                                provider = Activator.CreateInstance(providerType) as ICorrelationProvider;
+                            }
+
+                            System.Threading.Thread.MemoryBarrier();
+                            this.correlationProvider = provider;
+                        }
+                    }
+                }
+
+                return this.correlationProvider;
+            }
+        }
+    }
+
+    internal sealed class CorrelationPropertyValue
+    {
+        string name;
+        string locationPath;
+        int signaturePosition;
+
+        internal CorrelationPropertyValue(string name, string locationPath, int signaturePosition)
+        {
+            this.name = name;
+            this.locationPath = locationPath;
+            this.signaturePosition = signaturePosition;
+        }
+
+        internal object GetValue(object[] args)
+        {
+            if (args.Length <= this.signaturePosition)
+                throw new ArgumentOutOfRangeException("args");
+
+            object arg = args[this.signaturePosition];
+            if (arg == null)
+                return arg;
+            Type type = arg.GetType();
+            object val = arg;
+            if (this.locationPath.Length != 0)
+            {
+                string[] split = locationPath.Split(new Char[] { '.' });
+                for (int i = 1; i < split.Length; i++)
+                {
+                    string s = split[i];
+                    if (null == arg)
+                        break;
+                    val = type.InvokeMember(s, BindingFlags.Public | BindingFlags.Instance | BindingFlags.GetField | BindingFlags.GetProperty, null, arg, null, null);
+
+                    MemberInfo[] mInfos = type.GetMember(s, BindingFlags.Public | BindingFlags.Instance | BindingFlags.GetField | BindingFlags.GetProperty);
+
+                    type = GetMemberType(mInfos[0]);
+                    arg = val;
+                }
+            }
+            return val;
+        }
+
+        internal string Name
+        {
+            get
+            {
+                return this.name;
+            }
+        }
+
+        private Type GetMemberType(MemberInfo mInfo)
+        {
+            Type type = null;
+            switch (mInfo.MemberType)
+            {
+                case MemberTypes.Field:
+                    type = ((FieldInfo)mInfo).FieldType;
+                    break;
+
+                case MemberTypes.Property:
+                    type = ((PropertyInfo)mInfo).PropertyType;
+                    break;
+
+                default:
+                    Debug.Assert(false, "locationPath points to something other than a Field/Property");
+                    return null;
+            }
+
+            return type;
+        }
+    }
+
+    internal sealed class DefaultCorrelationProvider : ICorrelationProvider
+    {
+        Type interfaceType;
+
+        // map of method name to correlation properties
+        Dictionary<string, CorrelationPropertyValue[]> cachedCorrelationProperties;
+        object cachedCorrelationPropertiesSync = new object();
+
+        // cached initializers
+        // map operation to bool flag to indicate events
+        Dictionary<string, bool> initializerCorrelationPropertys = null;
+        object initializerCorrelationPropertysSync = new object();
+
+        internal DefaultCorrelationProvider(Type interfaceType)
+        {
+            this.cachedCorrelationProperties = new Dictionary<string, CorrelationPropertyValue[]>();
+            this.interfaceType = interfaceType;
+        }
+
+        ICollection<CorrelationProperty> ICorrelationProvider.ResolveCorrelationPropertyValues(Type interfaceType, string methodName, object[] methodArgs, bool provideInitializerTokens)
+        {
+            CorrelationPropertyValue[] correlationProperties = null;
+
+            if (methodArgs == null || provideInitializerTokens)
+            {
+                return null; // no initializer specific token to return
+            }
+
+            this.cachedCorrelationProperties.TryGetValue(methodName, out correlationProperties);
+            if (correlationProperties == null)
+            {
+                lock (this.cachedCorrelationPropertiesSync)
+                {
+                    this.cachedCorrelationProperties.TryGetValue(methodName, out correlationProperties);
+                    if (correlationProperties == null)
+                    {
+                        correlationProperties = GetCorrelationProperties(interfaceType, methodName);
+                        this.cachedCorrelationProperties.Add(methodName, correlationProperties);
+                    }
+                }
+            }
+
+            List<CorrelationProperty> predicates = new List<CorrelationProperty>();
+            for (int i = 0; i < correlationProperties.Length; i++)
+            {
+                predicates.Add(new CorrelationProperty(correlationProperties[i].Name, correlationProperties[i].GetValue(methodArgs)));
+            }
+
+            return predicates;
+        }
+
+        private Dictionary<string, bool> InitializerCorrelationPropertys
+        {
+            get
+            {
+                if (this.initializerCorrelationPropertys == null)
+                {
+                    lock (this.initializerCorrelationPropertysSync)
+                    {
+                        if (this.initializerCorrelationPropertys == null)
+                        {
+                            Dictionary<string, bool> members = new Dictionary<string, bool>();
+                            // note this is separated out since we may need to distinguish between events & methods
+                            foreach (EventInfo member in this.interfaceType.GetEvents())
+                            {
+                                if ((member.GetCustomAttributes(typeof(CorrelationInitializerAttribute), true)).Length > 0)
+                                {
+                                    members.Add(member.Name, true);
+                                }
+                            }
+                            foreach (MethodInfo member in this.interfaceType.GetMethods())
+                            {
+                                if ((member.GetCustomAttributes(typeof(CorrelationInitializerAttribute), true)).Length > 0)
+                                {
+                                    members.Add(member.Name, false);
+                                }
+                            }
+
+                            this.initializerCorrelationPropertys = members;
+                        }
+                    }
+                }
+                return this.initializerCorrelationPropertys;
+            }
+        }
+
+        bool ICorrelationProvider.IsInitializingMember(Type interfaceType, string memberName, object[] methodArgs)
+        {
+            return InitializerCorrelationPropertys.ContainsKey(memberName);
+        }
+
+        private CorrelationPropertyValue[] GetCorrelationProperties(Type interfaceType, string methodName)
+        {
+            CorrelationPropertyValue[] correlationProperties = null;
+
+            if (interfaceType.GetCustomAttributes(typeof(ExternalDataExchangeAttribute), true).Length == 0)
+                throw new InvalidOperationException(SR.GetString(SR.Error_ExternalDataExchangeException, interfaceType.AssemblyQualifiedName));
+
+            List<Object> correlationParamAttributes = new List<Object>();
+            correlationParamAttributes.AddRange(GetCorrelationParameterAttributes(interfaceType));
+
+            if (correlationParamAttributes.Count == 0)
+                throw new InvalidOperationException(SR.GetString(SR.Error_CorrelationParameterException, interfaceType.AssemblyQualifiedName));
+
+            correlationProperties = new CorrelationPropertyValue[correlationParamAttributes.Count];
+
+            Dictionary<String, CorrelationAliasAttribute> corrAliases = null;
+            MethodInfo methodInfo = null;
+
+            GetMethodInfo(interfaceType, methodName, out methodInfo, out corrAliases);
+
+            if (methodInfo == null)
+            {
+                throw new MissingMethodException(interfaceType.AssemblyQualifiedName, methodName);
+            }
+
+            ParameterInfo[] parameters = methodInfo.GetParameters();
+
+            int i = 0;
+            foreach (CorrelationParameterAttribute paramAttribute in correlationParamAttributes)
+            {
+                String location = paramAttribute.Name;
+                CorrelationAliasAttribute aliasAttribute = GetMatchingCorrelationAlias(paramAttribute, corrAliases, correlationParamAttributes.Count == 1);
+
+                if (aliasAttribute != null)
+                    location = aliasAttribute.Path;
+
+                CorrelationPropertyValue value = GetCorrelationProperty(parameters, paramAttribute.Name, location);
+                if (value == null)
+                    throw new InvalidOperationException(SR.GetString(SR.Error_CorrelationParameterException, interfaceType.AssemblyQualifiedName, paramAttribute.Name, methodName));
+
+                correlationProperties[i++] = value;
+            }
+            return correlationProperties;
+        }
+
+        private CorrelationAliasAttribute GetMatchingCorrelationAlias(CorrelationParameterAttribute paramAttribute, Dictionary<String, CorrelationAliasAttribute> correlationAliases, bool defaultParameter)
+        {
+            CorrelationAliasAttribute corrAlias = null;
+
+            if (correlationAliases == null) return null;
+
+            if (defaultParameter)
+            {
+                if (correlationAliases.TryGetValue("", out corrAlias))
+                {
+                    return corrAlias;
+                }
+            }
+
+            correlationAliases.TryGetValue(paramAttribute.Name, out corrAlias);
+            return corrAlias;
+        }
+
+        private CorrelationPropertyValue GetCorrelationProperty(ParameterInfo[] parameters, String propertyName, String location)
+        {
+            string[] split = location.Split(new Char[] { '.' });
+
+            if (split.Length == 1 && parameters.Length == 2)
+            {
+                if (typeof(ExternalDataEventArgs).IsAssignableFrom(parameters[1].ParameterType))
+                {
+                    string aliasedLocation = "e." + location;
+                    return GetCorrelationProperty(parameters, propertyName, "e", aliasedLocation);
+                }
+
+            }
+            string parameterName = split[0];
+
+            return GetCorrelationProperty(parameters, propertyName, parameterName, location);
+        }
+
+        private void GetMethodInfo(Type interfaceType, string methodName, out MethodInfo methodInfo, out Dictionary<String, CorrelationAliasAttribute> correlationAliases)
+        {
+            correlationAliases = new Dictionary<String, CorrelationAliasAttribute>();
+            Object[] customAttrs = null;
+            methodInfo = null;
+            // check events
+            BindingFlags bindingFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
+            EventInfo eventInfo = interfaceType.GetEvent(methodName, bindingFlags);
+            if (eventInfo != null)
+            {
+                customAttrs = eventInfo.GetCustomAttributes(typeof(CorrelationAliasAttribute), true);
+                if (customAttrs == null || customAttrs.Length == 0)
+                {
+                    customAttrs = eventInfo.EventHandlerType.GetCustomAttributes(typeof(CorrelationAliasAttribute), true);
+                }
+                MethodInfo[] methInfo = eventInfo.EventHandlerType.GetMethods();
+                methodInfo = methInfo[0];
+            }
+            else
+            {
+                // check methods
+                methodInfo = interfaceType.GetMethod(methodName, bindingFlags);
+                if (methodInfo == null)
+                {
+                    throw new MissingMethodException(interfaceType.AssemblyQualifiedName, methodName);
+                }
+                customAttrs = methodInfo.GetCustomAttributes(typeof(CorrelationAliasAttribute), true);
+            }
+
+            foreach (CorrelationAliasAttribute aliasAttribute in customAttrs)
+            {
+                if (customAttrs.Length > 1)
+                {
+                    Debug.Assert(aliasAttribute.Name != null);
+                    if (aliasAttribute.Name == null)
+                        throw new ArgumentNullException("ParameterName");
+                }
+                correlationAliases.Add(aliasAttribute.Name == null ? "" : aliasAttribute.Name, aliasAttribute);
+            }
+        }
+
+        private CorrelationPropertyValue GetCorrelationProperty(ParameterInfo[] parameters, string propertyName, string parameterName, string location)
+        {
+            for (int j = 0; parameters != null && j < parameters.Length; j++)
+            {
+                ParameterInfo param = parameters[j];
+                if (param.Name == parameterName)
+                {
+                    // parameter match
+                    return new CorrelationPropertyValue(propertyName, location, param.Position);
+                }
+            }
+
+            return null;
+        }
+
+        private object[] GetCorrelationParameterAttributes(Type type)
+        {
+            return type.GetCustomAttributes(typeof(CorrelationParameterAttribute), true);
+        }
+    }
+
+    internal sealed class NonCorrelatedProvider : ICorrelationProvider
+    {
+        internal NonCorrelatedProvider()
+        {
+        }
+
+        ICollection<CorrelationProperty> ICorrelationProvider.ResolveCorrelationPropertyValues(Type interfaceType, string methodName, object[] methodArgs, bool provideInitializerTokens)
+        {
+            // non correlated 
+            // no values to return
+            return null;
+        }
+
+        bool ICorrelationProvider.IsInitializingMember(Type interfaceType, string memberName, object[] methodArgs)
+        {
+            return true;
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Activities/LocalService/CorrelationService.cs

@@ -0,0 +1,308 @@
+#region Using directives
+
+using System;
+using System.Diagnostics;
+using System.Collections.Generic;
+using System.Collections;
+using System.Reflection;
+using System.Runtime.Serialization;
+using System.Workflow.ComponentModel;
+using System.Workflow.Runtime;
+using System.Workflow.Runtime.Hosting;
+using System.Runtime.Remoting.Messaging;
+using System.Xml;
+using System.Globalization;
+
+#endregion
+
+namespace System.Workflow.Activities
+{
+    internal interface ICorrelationProvider
+    {
+        ICollection<CorrelationProperty> ResolveCorrelationPropertyValues(Type interfaceType, string memberName, object[] methodArgs, bool provideInitializerTokens);
+        bool IsInitializingMember(Type interfaceType, string memberName, object[] methodArgs);
+    }
+
+    [AttributeUsageAttribute(AttributeTargets.Interface | AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
+    internal sealed class CorrelationProviderAttribute : Attribute
+    {
+        private Type correlationProviderType;
+
+        internal CorrelationProviderAttribute(Type correlationProviderType)
+        {
+            this.correlationProviderType = correlationProviderType;
+        }
+
+        internal Type CorrelationProviderType
+        {
+            get
+            {
+                return this.correlationProviderType;
+            }
+        }
+    }
+
+    internal static class CorrelationService
+    {
+        internal static void Initialize(IServiceProvider context, Activity activity, Type interfaceType, string methodName, Guid instanceId)
+        {
+            if (activity == null)
+                throw new ArgumentNullException("activity");
+            if (interfaceType == null)
+                throw new ArgumentNullException("interfaceType");
+            if (methodName == null)
+                throw new ArgumentNullException("methodName");
+
+            Subscribe(context, activity, interfaceType, methodName, null, instanceId);
+            InitializeFollowers(context, interfaceType, methodName);
+        }
+
+        internal static bool Subscribe(IServiceProvider context, Activity activity, Type interfaceType, string methodName, IActivityEventListener<QueueEventArgs> eventListener, Guid instanceId)
+        {
+            if (activity == null)
+                throw new ArgumentNullException("activity");
+            if (interfaceType == null)
+                throw new ArgumentNullException("interfaceType");
+            if (methodName == null)
+                throw new ArgumentNullException("methodName");
+
+            WorkflowQueuingService queueService = (WorkflowQueuingService)context.GetService(typeof(WorkflowQueuingService));
+            IComparable queueName = ResolveQueueName(activity, interfaceType, methodName);
+            if (queueName != null)
+            {
+                // initializer
+                WorkflowQueue queue = null;
+                if (queueService.Exists(queueName))
+                {
+                    queue = queueService.GetWorkflowQueue(queueName);
+                    queue.Enabled = true;
+                }
+                else
+                {
+                    queue = queueService.CreateWorkflowQueue(queueName, true);
+                }
+
+                if (eventListener != null)
+                {
+                    queue.RegisterForQueueItemAvailable(eventListener, activity.QualifiedName);
+                    WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "CorrelationService: activity '{0}' subscribing to QueueItemAvailable", activity.QualifiedName);
+                    return true;
+                }
+                return false;
+            }
+
+            SubscribeForCorrelationTokenInvalidation(activity, interfaceType, methodName, eventListener, instanceId);
+            return false;
+        }
+
+        internal static bool Unsubscribe(IServiceProvider context, Activity activity, Type interfaceType, string methodName, IActivityEventListener<QueueEventArgs> eventListener)
+        {
+            if (activity == null)
+                throw new ArgumentException("activity");
+            if (interfaceType == null)
+                throw new ArgumentNullException("interfaceType");
+            if (methodName == null)
+                throw new ArgumentNullException("methodName");
+
+            WorkflowQueuingService queueService = (WorkflowQueuingService)context.GetService(typeof(WorkflowQueuingService));
+            IComparable queueName = ResolveQueueName(activity, interfaceType, methodName);
+            if (queueName != null)
+            {
+                if (queueService.Exists(queueName))
+                {
+                    queueService.GetWorkflowQueue(queueName).UnregisterForQueueItemAvailable(eventListener);
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        internal static IComparable ResolveQueueName(Activity activity, Type interfaceType, string methodName)
+        {
+            if (activity == null)
+                throw new ArgumentNullException("activity");
+            if (interfaceType == null)
+                throw new ArgumentNullException("interfaceType");
+            if (methodName == null)
+                throw new ArgumentNullException("methodName");
+
+            // resolver will check for an explicit correlation provider, 
+            // if none present this will return an uncorrelated provider.
+            // note, an uncorrelated methodName will always be an initializer
+            if (CorrelationResolver.IsInitializingMember(interfaceType, methodName, null))
+            {
+                ICollection<CorrelationProperty> corrvalues = CorrelationResolver.ResolveCorrelationValues(interfaceType, methodName, null, true);
+                return new EventQueueName(interfaceType, methodName, corrvalues);
+            }
+
+            CorrelationToken reference = GetCorrelationToken(activity);
+            if (!reference.Initialized)
+                return null;
+
+            return new EventQueueName(interfaceType, methodName, reference.Properties);
+        }
+
+        internal static void InvalidateCorrelationToken(Activity activity, Type interfaceType, string methodName, object[] messageArgs)
+        {
+            object correlationProvider = CorrelationResolver.GetCorrelationProvider(interfaceType);
+            if (correlationProvider is NonCorrelatedProvider)
+                return;
+
+            CorrelationToken reference = GetCorrelationToken(activity);
+            ICollection<CorrelationProperty> correlationvalues = CorrelationResolver.ResolveCorrelationValues(interfaceType, methodName, messageArgs, false);
+
+            if (!CorrelationResolver.IsInitializingMember(interfaceType, methodName, messageArgs))
+            {
+                if (!reference.Initialized)
+                    throw new InvalidOperationException(SR.GetString(SR.Error_CorrelationNotInitialized, reference.Name, activity.QualifiedName));
+                ValidateCorrelation(reference.Properties, correlationvalues, reference.Name, activity);
+                return;
+            }
+
+            // invalidate correlation token if methodName is an initializer
+            reference.Initialize(activity, correlationvalues);
+        }
+
+        private static CorrelationToken GetCorrelationToken(Activity activity)
+        {
+            DependencyProperty dependencyProperty = DependencyProperty.FromName("CorrelationToken", activity.GetType());
+            if (dependencyProperty == null)
+                dependencyProperty = DependencyProperty.FromName("CorrelationToken", activity.GetType().BaseType);
+            CorrelationToken reference = activity.GetValue(dependencyProperty) as CorrelationToken;
+            if (reference == null)
+                throw new InvalidOperationException(SR.GetString(SR.Error_CorrelationTokenMissing, activity.Name));
+
+            CorrelationToken correlator = CorrelationTokenCollection.GetCorrelationToken(activity, reference.Name, reference.OwnerActivityName);
+            if (correlator == null)
+                throw new InvalidOperationException(SR.GetString(SR.Error_CorrelationTokenMissing, activity.Name));
+
+            return correlator;
+        }
+
+        private static void ValidateCorrelation(ICollection<CorrelationProperty> initializerProperties, ICollection<CorrelationProperty> followerProperties, string memberName, Activity activity)
+        {
+            if (followerProperties == null && initializerProperties == null)
+                return;
+
+            if (followerProperties == null || initializerProperties == null)
+                throw new InvalidOperationException(SR.GetString(SR.Error_CorrelationViolationException, memberName, activity.QualifiedName));
+
+            if (initializerProperties.Count != followerProperties.Count)
+                throw new InvalidOperationException(SR.GetString(SR.Error_CorrelationViolationException, memberName, activity.QualifiedName));
+
+            IEnumerator<CorrelationProperty> initializerValues = initializerProperties.GetEnumerator();
+            IEnumerator<CorrelationProperty> followerValues = followerProperties.GetEnumerator();
+            while (initializerValues.MoveNext() && followerValues.MoveNext())
+            {
+                IComparable initializerValue = initializerValues.Current.Value as IComparable;
+                object followerValue = followerValues.Current.Value;
+
+                // Bug DevDiv2\DevDiv 552322 - http://vstfdevdiv.redmond.corp.microsoft.com:8080/DevDiv2/DevDiv/_workitems#_a=edit&id=552322
+                // Reflection does not guarantee ordering, so the two collections (arrays) of
+                // CorrelationProperties may not be in the same order, based on Name. So we need to check all the
+                // elements of the followerProperties for the Name of the current initializerValue.
+                // The collections MIGHT be in the same order. Before searching the followerProperties collection for an element with a matching
+                // name, see if the current element in the initializerValues and followerValues enumerators have a matching name.
+                // If they do match, just fall thru because followerValue is already set to followerValues.Current.Value;
+                if (!initializerValues.Current.Name.Equals(followerValues.Current.Name, StringComparison.OrdinalIgnoreCase))
+                {
+                    CorrelationProperty followerProperty = null;
+                    IEnumerator<CorrelationProperty> followerEnumerator = followerProperties.GetEnumerator();
+                    while (followerEnumerator.MoveNext())
+                    {
+                        // We don't need to be concerned with culture here because the names we are comparing
+                        // are parameter names on methods in an interface.
+                        if (initializerValues.Current.Name.Equals(followerEnumerator.Current.Name, StringComparison.OrdinalIgnoreCase))
+                        {
+                            // We found a matching Name in the follower collection.
+                            // Saving the followerProperty rather than followerEnumerator.Current.Value here
+                            // because the latter could be null and still be correct. I need something
+                            // that indicates that we actually found a matching CorrelationProperty in the
+                            // collection. So instead of having a separate bool, I just have a reference
+                            // to the matching CorrelationProperty.
+                            followerProperty = followerEnumerator.Current;
+                            break;
+                        }
+                        // If we get here, the name of the parameter doesn't match, so just move to the next element in the 
+                        // followerEnumerator.
+                    }
+                    // If we found a followerProperty with a matching name, use it.
+                    // In the highly, possibly impossible, event that we didn't find an element in the
+                    // followerProperties collection with a matching name, we fall thru with
+                    // followerValue = followerValues.Current.Value, which is exactly what the previous
+                    // code had, and we act just like we did before.
+                    if (followerProperty != null)
+                    {
+                        followerValue = followerProperty.Value;
+                    }
+                }
+
+                if (initializerValue != null && (initializerValue.CompareTo(followerValue) != 0))
+                    throw new InvalidOperationException(SR.GetString(SR.Error_CorrelationViolationException, memberName, activity.QualifiedName));
+                else if (initializerValues.Current.Value == null && followerValue == null)
+                    return;
+                else if (initializerValue == null && followerValue != null && !followerValue.Equals(initializerValues.Current.Value))
+                    throw new InvalidOperationException(SR.GetString(SR.Error_CorrelationViolationException, memberName, activity.QualifiedName));
+            }
+        }
+
+        private static void SubscribeForCorrelationTokenInvalidation(Activity activity, Type interfaceType, string followermethodName, IActivityEventListener<QueueEventArgs> eventListener, Guid instanceId)
+        {
+            CorrelationToken reference = GetCorrelationToken(activity);
+            CorrelationTokenInvalidatedHandler dataChangeEventListener = new CorrelationTokenInvalidatedHandler(interfaceType, followermethodName, eventListener, instanceId);
+            reference.SubscribeForCorrelationTokenInitializedEvent(activity, dataChangeEventListener);
+        }
+
+        private static void InitializeFollowers(IServiceProvider context, Type interfaceType, string followermethodName)
+        {
+            if (CorrelationResolver.IsInitializingMember(interfaceType, followermethodName, null))
+                return;
+
+            EventInfo[] events = interfaceType.GetEvents();
+            foreach (EventInfo e in events)
+            {
+                CreateFollowerEntry(context, interfaceType, followermethodName, e.Name);
+            }
+        }
+
+        private static void CreateFollowerEntry(IServiceProvider context, Type interfaceType, string followermethodName, string initializermethodName)
+        {
+            if (!CorrelationResolver.IsInitializingMember(interfaceType, initializermethodName, null))
+                return;
+
+            WorkflowQueuingService queueSvcs = (WorkflowQueuingService)context.GetService(typeof(WorkflowQueuingService));
+            FollowerQueueCreator follower = new FollowerQueueCreator(followermethodName);
+            WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "Creating follower {0} on initializer {1}", interfaceType.Name + followermethodName, interfaceType.Name + initializermethodName);
+
+            ICollection<CorrelationProperty> corrValues = CorrelationResolver.ResolveCorrelationValues(interfaceType, initializermethodName, null, true);
+            EventQueueName key = new EventQueueName(interfaceType, initializermethodName, corrValues);
+            WorkflowQueue initializerQueue = null;
+            if (queueSvcs.Exists(key))
+            {
+                initializerQueue = queueSvcs.GetWorkflowQueue(key);
+            }
+            else
+            {
+                // traversed follower before initializer
+                initializerQueue = queueSvcs.CreateWorkflowQueue(key, true);
+                initializerQueue.Enabled = false;
+            }
+
+            initializerQueue.RegisterForQueueItemArrived(follower);
+        }
+
+        internal static void UninitializeFollowers(Type interfaceType, string initializer, WorkflowQueue initializerQueue)
+        {
+            if (!CorrelationResolver.IsInitializingMember(interfaceType, initializer, null))
+                return;
+
+            EventInfo[] events = interfaceType.GetEvents();
+            foreach (EventInfo e in events)
+            {
+                string follower = e.Name;
+                if (!CorrelationResolver.IsInitializingMember(interfaceType, e.Name, null))
+                    initializerQueue.UnregisterForQueueItemArrived(new FollowerQueueCreator(follower));
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Activities/LocalService/CorrelationTokenInvalidatedHandler.cs

@@ -0,0 +1,133 @@
+using System;
+using System.Diagnostics;
+using System.Collections.Generic;
+using System.Collections;
+using System.Reflection;
+using System.Runtime.Serialization;
+using System.Workflow.ComponentModel;
+using System.Workflow.Runtime;
+using System.Workflow.Runtime.Hosting;
+
+namespace System.Workflow.Activities
+{
+    [Serializable]
+    internal sealed class CorrelationTokenInvalidatedHandler : IActivityEventListener<CorrelationTokenEventArgs>
+    {
+        IActivityEventListener<QueueEventArgs> eventHandler;
+        EventQueueName queueName;
+        Guid subscriptionId;
+        Guid instanceId;
+
+        bool queueCreator;
+        Type interfaceType;
+        string followerOperation;
+
+        internal CorrelationTokenInvalidatedHandler(Type interfaceType, string operation, IActivityEventListener<QueueEventArgs> eventHandler, Guid instanceId)
+        {
+            this.eventHandler = eventHandler;
+            this.interfaceType = interfaceType;
+            this.followerOperation = operation;
+            this.instanceId = instanceId;
+        }
+
+        #region IActivityEventListener<CorrelationTokenEventArgs> Members
+        void IActivityEventListener<CorrelationTokenEventArgs>.OnEvent(object sender, CorrelationTokenEventArgs dataChangeEventArgs)
+        {
+            if (sender == null)
+                throw new ArgumentException("sender");
+            if (dataChangeEventArgs == null)
+                throw new ArgumentException("dataChangeEventArgs");
+
+            ActivityExecutionContext context = sender as ActivityExecutionContext;
+            Activity activity = context.Activity;
+
+            ICollection<CorrelationProperty> correlationValues = dataChangeEventArgs.CorrelationToken.Properties;
+            if (dataChangeEventArgs.IsInitializing)
+            {
+                CreateSubscription(this.instanceId, context, correlationValues);
+                return;
+            }
+
+            if (queueName != null)
+            {
+                if (!CorrelationResolver.IsInitializingMember(queueName.InterfaceType, queueName.MethodName,
+                    correlationValues == null ? null : new object[] { correlationValues }))
+                {
+                    DeleteSubscription(context);
+                }
+            }
+
+            dataChangeEventArgs.CorrelationToken.UnsubscribeFromCorrelationTokenInitializedEvent(activity, this);
+        }
+        #endregion
+
+        private void CreateSubscription(Guid instanceId, ActivityExecutionContext context, ICollection<CorrelationProperty> correlationValues)
+        {
+            WorkflowQueuingService queueSvcs = context.GetService<WorkflowQueuingService>();
+            EventQueueName queueId = new EventQueueName(this.interfaceType, this.followerOperation, correlationValues);
+
+            WorkflowQueue workflowQueue = null;
+            if (!queueSvcs.Exists(queueId))
+            {
+                WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "CorrelationTokenInvalidatedHandler: creating q {0} ", queueId.GetHashCode());
+                workflowQueue = queueSvcs.CreateWorkflowQueue(queueId, true);
+                queueCreator = true;
+            }
+            else
+            {
+                workflowQueue = queueSvcs.GetWorkflowQueue(queueId);
+            }
+
+            if (this.eventHandler != null)
+            {
+                workflowQueue.RegisterForQueueItemAvailable(this.eventHandler);
+            }
+
+            WorkflowSubscriptionService subscriptionService = (WorkflowSubscriptionService)context.GetService(typeof(WorkflowSubscriptionService));
+
+            MessageEventSubscription subscription = new MessageEventSubscription(queueId, instanceId);
+            this.queueName = queueId;
+            this.subscriptionId = subscription.SubscriptionId;
+            subscription.InterfaceType = this.interfaceType;
+            subscription.MethodName = this.followerOperation;
+
+            this.interfaceType = null;
+            this.followerOperation = null;
+
+            if (correlationValues != null)
+            {
+                foreach (CorrelationProperty property in correlationValues)
+                {
+                    subscription.CorrelationProperties.Add(property);
+                }
+            }
+
+            if (this.eventHandler != null)
+                return;
+
+            if (subscriptionService == null)
+                return;
+            subscriptionService.CreateSubscription(subscription);
+        }
+
+        private void DeleteSubscription(ActivityExecutionContext context)
+        {
+            if (this.queueName == null)
+                return;
+
+            WorkflowQueuingService queueSvcs = context.GetService<WorkflowQueuingService>();
+            if (queueCreator)
+                queueSvcs.DeleteWorkflowQueue(this.queueName);
+
+            if (this.eventHandler != null)
+                return;
+
+            WorkflowSubscriptionService subscriptionService = context.GetService<WorkflowSubscriptionService>();
+            if (subscriptionService != null)
+                subscriptionService.DeleteSubscription(this.subscriptionId);
+
+            WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "CorrelationTokenInvalidatedHandler subscription deleted SubId {0} QueueId {1}", this.subscriptionId, this.queueName);
+        }
+
+    }
+}

mcs/class/referencesource/System.Workflow.Activities/LocalService/CorrelationTokenTypeConvertor.cs

@@ -0,0 +1,160 @@
+using System;
+using System.Xml;
+using System.ComponentModel;
+using System.ComponentModel.Design;
+using System.ComponentModel.Design.Serialization;
+using System.Reflection;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.Diagnostics;
+using System.Runtime.Serialization;
+using System.Workflow.ComponentModel;
+using System.Workflow.ComponentModel.Design;
+using System.Workflow.ComponentModel.Serialization;
+using System.Workflow.Runtime;
+using System.Globalization;
+
+namespace System.Workflow.Activities
+{
+    internal sealed class CorrelationTokenTypeConverter : ExpandableObjectConverter
+    {
+        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
+        {
+            return (sourceType == typeof(string));
+        }
+
+        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
+        {
+            return (destinationType == typeof(string));
+        }
+
+        public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value)
+        {
+            object convertedValue = null;
+            string correlatorName = value as String;
+            if (!String.IsNullOrEmpty(correlatorName))
+            {
+                foreach (object obj in GetStandardValues(context))
+                {
+                    CorrelationToken correlator = obj as CorrelationToken;
+                    if (correlator != null && correlator.Name == correlatorName)
+                    {
+                        convertedValue = correlator;
+                        break;
+                    }
+                }
+
+                if (convertedValue == null)
+                    convertedValue = new CorrelationToken(correlatorName);
+            }
+
+            return convertedValue;
+        }
+
+        public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
+        {
+            object convertedValue = null;
+            CorrelationToken correlator = value as CorrelationToken;
+            if (destinationType == typeof(string) && correlator != null)
+                convertedValue = correlator.Name;
+            return convertedValue;
+        }
+
+        public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context)
+        {
+            ArrayList values = new ArrayList();
+            Activity activity = context.Instance as Activity;
+            if (activity != null)
+            {
+                foreach (Activity preceedingActivity in GetPreceedingActivities(activity))
+                {
+                    PropertyDescriptor correlatorProperty = TypeDescriptor.GetProperties(preceedingActivity)["CorrelationToken"] as PropertyDescriptor;
+                    if (correlatorProperty != null)
+                    {
+                        CorrelationToken correlator = correlatorProperty.GetValue(preceedingActivity) as CorrelationToken;
+                        if (correlator != null && !values.Contains(correlator))
+                            values.Add(correlator);
+                    }
+                }
+            }
+            return new StandardValuesCollection(values);
+        }
+
+        public override bool GetStandardValuesSupported(ITypeDescriptorContext context)
+        {
+            return true;
+        }
+
+        public override bool GetStandardValuesExclusive(ITypeDescriptorContext context)
+        {
+            return false;
+        }
+
+        public override PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context, object value, Attribute[] attributes)
+        {
+            PropertyDescriptorCollection properties = base.GetProperties(context, value, attributes);
+            ArrayList props = new ArrayList(properties);
+            return new PropertyDescriptorCollection((PropertyDescriptor[])props.ToArray(typeof(PropertyDescriptor)));
+        }
+
+        // 
+        private IEnumerable GetPreceedingActivities(Activity startActivity)
+        {
+            Activity currentActivity = null;
+            Stack<Activity> activityStack = new Stack<Activity>();
+            activityStack.Push(startActivity);
+
+            while ((currentActivity = activityStack.Pop()) != null)
+            {
+                if (currentActivity.Parent != null)
+                {
+                    foreach (Activity siblingActivity in currentActivity.Parent.Activities)
+                    {
+                        if (siblingActivity == currentActivity)
+                            break;
+
+                        if (siblingActivity.Enabled)
+                        {
+                            if (siblingActivity is CompositeActivity)
+                            {
+                                foreach (Activity containedActivity in GetContainedActivities((CompositeActivity)siblingActivity))
+                                    yield return containedActivity;
+                            }
+                            else
+                            {
+                                yield return siblingActivity;
+                            }
+                        }
+                    }
+                }
+                activityStack.Push(currentActivity.Parent);
+            }
+            yield break;
+        }
+
+        private IEnumerable GetContainedActivities(CompositeActivity activity)
+        {
+            if (!activity.Enabled)
+                yield break;
+
+            foreach (Activity containedActivity in activity.Activities)
+            {
+                if (containedActivity is CompositeActivity)
+                {
+                    foreach (Activity nestedActivity in GetContainedActivities((CompositeActivity)containedActivity))
+                    {
+                        if (nestedActivity.Enabled)
+                            yield return nestedActivity;
+                    }
+                }
+                else
+                {
+                    if (containedActivity.Enabled)
+                        yield return containedActivity;
+                }
+            }
+            yield break;
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Activities/LocalService/DataExchangeServiceBinder.cs

@@ -0,0 +1,117 @@
+
+using System;
+using System.Diagnostics;
+using System.Collections;
+using System.Collections.Generic;
+using System.Text;
+using System.Reflection;
+using System.Runtime.Serialization;
+using System.Runtime.Remoting;
+using System.Runtime.Remoting.Messaging;
+using System.Runtime.Remoting.Proxies;
+using System.Workflow.ComponentModel;
+using System.Workflow.Runtime;
+using System.Workflow.Runtime.Hosting;
+using System.Security.Permissions;
+using System.Globalization;
+
+
+namespace System.Workflow.Activities
+{
+    internal sealed class ExternalDataExchangeBinder : Binder
+    {
+        Binder defltBinder;
+
+        internal ExternalDataExchangeBinder()
+        {
+            defltBinder = Type.DefaultBinder;
+        }
+
+        public override MethodBase BindToMethod(BindingFlags bindingAttr,
+                                                MethodBase[] match,
+                                                ref object[] args,
+                                                ParameterModifier[] modifiers,
+                                                System.Globalization.CultureInfo culture,
+                                                string[] names,
+                                                out object state)
+        {
+            Object[] argsCopy = new Object[args.Length];
+            args.CopyTo(argsCopy, 0);
+            state = null;
+
+            try
+            {
+                return defltBinder.BindToMethod(bindingAttr, match, ref args, modifiers, culture, names, out state);
+            }
+            catch (MissingMethodException) //5% case where when passed null for params.
+            {
+
+                if (match != null && match.Length != 0)
+                {
+                    for (int i = 0; i < match.Length; ++i)
+                    {
+                        ParameterInfo[] methodParams = match[i].GetParameters();
+
+                        if (methodParams.Length == argsCopy.Length)
+                        {
+                            for (int j = 0; j < methodParams.Length; ++j)
+                            {
+                                if (!methodParams[j].ParameterType.IsInstanceOfType(argsCopy[j]))
+                                {
+                                    if (!(methodParams[j].ParameterType.IsArray && argsCopy[j] == null))
+                                        break;
+                                }
+
+                                if (j + 1 == methodParams.Length)
+                                    return match[i];
+                            }
+                        }
+                    }
+                }
+            }
+
+            return null;
+        }
+
+        public override FieldInfo BindToField(BindingFlags bindingAttr,
+                                               FieldInfo[] match,
+                                               object value,
+                                               CultureInfo culture)
+        {
+            return defltBinder.BindToField(bindingAttr, match, value, culture);
+        }
+
+        public override MethodBase SelectMethod(BindingFlags bindingAttr,
+                                                MethodBase[] match,
+                                                Type[] types,
+                                                ParameterModifier[] modifiers)
+        {
+            return defltBinder.SelectMethod(bindingAttr, match, types, modifiers);
+        }
+
+        public override PropertyInfo SelectProperty(BindingFlags bindingAttr,
+                                                    PropertyInfo[] match,
+                                                    Type returnType,
+                                                    Type[] indexes,
+                                                    ParameterModifier[] modifiers
+        )
+        {
+            return defltBinder.SelectProperty(bindingAttr, match, returnType, indexes, modifiers);
+        }
+
+        public override object ChangeType(object value,
+                                          Type type,
+                                          CultureInfo culture
+        )
+        {
+            return defltBinder.ChangeType(value, type, culture);
+        }
+
+        public override void ReorderArgumentArray(ref object[] args,
+                                                  object state
+        )
+        {
+            defltBinder.ReorderArgumentArray(ref args, state);
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Activities/LocalService/ExternalDataExchangeService.cs

@@ -0,0 +1,381 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+using System;
+using System.Diagnostics;
+using System.Collections;
+using System.Collections.ObjectModel;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.Reflection;
+using System.Workflow.ComponentModel;
+using System.Workflow.Runtime;
+using System.Workflow.Runtime.Configuration;
+using System.Workflow.Runtime.Hosting;
+using System.Runtime.Serialization;
+using System.Globalization;
+using System.Threading;
+using System.Runtime.Serialization.Formatters.Binary;
+using System.Configuration;
+
+namespace System.Workflow.Activities
+{
+    internal interface IDeliverMessage
+    {
+        object[] PrepareEventArgsArray(object sender, ExternalDataEventArgs eventArgs, out object workItem, out IPendingWork workHandler);
+        void DeliverMessage(ExternalDataEventArgs eventArgs, IComparable queueName, object message, object workItem, IPendingWork workHandler);
+    }
+
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public class ExternalDataExchangeServiceSection : ConfigurationSection
+    {
+        private const string _services = "Services";
+
+        /// <summary> The providers to be instantiated by the service container. </summary>
+        [ConfigurationProperty(_services, DefaultValue = null)]
+        public WorkflowRuntimeServiceElementCollection Services
+        {
+            get
+            {
+                return (WorkflowRuntimeServiceElementCollection)base[_services];
+            }
+        }
+    }
+
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public class ExternalDataExchangeService : WorkflowRuntimeService
+    {
+        Dictionary<int, WorkflowMessageEventHandler> eventHandlers = null;
+        object handlersLock = new object();
+        private const string configurationSectionAttributeName = "ConfigurationSection";
+        ExternalDataExchangeServiceSection settings = null;
+        IDeliverMessage enqueueMessageWrapper = null;
+        List<object> services;
+        object servicesLock = new object();
+
+        public ExternalDataExchangeService()
+        {
+            this.eventHandlers = new Dictionary<int, WorkflowMessageEventHandler>();
+            this.services = new List<object>();
+            this.enqueueMessageWrapper = new EnqueueMessageWrapper(this);
+        }
+
+        public ExternalDataExchangeService(string configSectionName)
+            : this()
+        {
+            if (configSectionName == null)
+                throw new ArgumentNullException("configSectionName");
+
+            settings = ConfigurationManager.GetSection(configSectionName) as ExternalDataExchangeServiceSection;
+            if (settings == null)
+                throw new ArgumentException(String.Format(CultureInfo.CurrentCulture,
+                    SR.GetString(SR.Error_ConfigurationSectionNotFound), configSectionName));
+        }
+
+        public ExternalDataExchangeService(NameValueCollection parameters)
+            : this()
+        {
+            if (parameters == null)
+                throw new ArgumentNullException("parameters");
+            string configurationSectionName = null;
+
+            foreach (string key in parameters.Keys)
+            {
+                if (key.Equals(configurationSectionAttributeName, StringComparison.OrdinalIgnoreCase))
+                {
+                    configurationSectionName = parameters[key];
+                }
+                else
+                {
+                    throw new ArgumentException(
+                        String.Format(Thread.CurrentThread.CurrentCulture, SR.GetString(SR.Error_UnknownConfigurationParameter), key), "parameters");
+                }
+            }
+            if (configurationSectionName != null)
+            {
+                settings = ConfigurationManager.GetSection(configurationSectionName) as ExternalDataExchangeServiceSection;
+                if (settings == null)
+                    throw new ArgumentException(String.Format(CultureInfo.CurrentCulture,
+                        SR.GetString(SR.Error_ConfigurationSectionNotFound), configurationSectionName));
+            }
+
+        }
+
+        public ExternalDataExchangeService(ExternalDataExchangeServiceSection settings)
+            : this()
+        {
+            if (settings == null)
+                throw new ArgumentNullException("settings");
+
+            this.settings = settings;
+        }
+
+        internal ReadOnlyCollection<object> GetAllServices()
+        {
+            ReadOnlyCollection<object> collection;
+            lock (this.servicesLock)
+            {
+                collection = this.services.AsReadOnly();
+            }
+
+            return collection;
+        }
+
+        protected override void Start()
+        {
+            if (settings != null)
+            {
+                foreach (WorkflowRuntimeServiceElement service in settings.Services)
+                {
+                    AddService(ServiceFromSettings(service));
+                }
+            }
+
+            if (this.Runtime != null)
+            {
+                base.Start();
+            }
+        }
+
+        internal void SetEnqueueMessageWrapper(IDeliverMessage wrapper)
+        {
+            this.enqueueMessageWrapper = wrapper;
+            foreach (WorkflowMessageEventHandler eventHandler in this.eventHandlers.Values)
+            {
+                eventHandler.EnqueueWrapper = wrapper;
+            }
+        }
+
+        // Todo: This is duplicate of code in WorkflowRuntime
+        internal object ServiceFromSettings(WorkflowRuntimeServiceElement serviceSettings)
+        {
+            object service = null;
+
+            Type t = Type.GetType(serviceSettings.Type, true);
+
+            ConstructorInfo serviceProviderAndSettingsConstructor = null;
+            ConstructorInfo serviceProviderConstructor = null;
+            ConstructorInfo settingsConstructor = null;
+
+            foreach (ConstructorInfo ci in t.GetConstructors())
+            {
+                ParameterInfo[] pi = ci.GetParameters();
+                if (pi.Length == 1)
+                {
+                    if (typeof(IServiceProvider).IsAssignableFrom(pi[0].ParameterType))
+                    {
+                        serviceProviderConstructor = ci;
+                    }
+                    else if (typeof(NameValueCollection).IsAssignableFrom(pi[0].ParameterType))
+                    {
+                        settingsConstructor = ci;
+                    }
+                }
+                else if (pi.Length == 2)
+                {
+                    if (typeof(IServiceProvider).IsAssignableFrom(pi[0].ParameterType)
+                        && typeof(NameValueCollection).IsAssignableFrom(pi[1].ParameterType))
+                    {
+                        serviceProviderAndSettingsConstructor = ci;
+                        break;
+                    }
+                }
+            }
+
+            if (serviceProviderAndSettingsConstructor != null)
+            {
+                service = serviceProviderAndSettingsConstructor.Invoke(
+                    new object[] { Runtime, serviceSettings.Parameters });
+            }
+            else if (serviceProviderConstructor != null)
+            {
+                service = serviceProviderConstructor.Invoke(new object[] { Runtime });
+            }
+            else if (settingsConstructor != null)
+            {
+                service = settingsConstructor.Invoke(new object[] { serviceSettings.Parameters });
+            }
+            else
+            {
+                service = Activator.CreateInstance(t);
+            }
+            return service;
+        }
+
+        public virtual void AddService(object service)
+        {
+            if (service == null)
+                throw new ArgumentNullException("service");
+
+            InterceptService(service, true);
+            if (this.Runtime != null)
+            {
+                this.Runtime.AddService(service);
+            }
+            else
+            {
+                lock (this.servicesLock)
+                {
+                    this.services.Add(service);
+                }
+            }
+        }
+
+        public virtual void RemoveService(object service)
+        {
+            if (service == null)
+                throw new ArgumentNullException("service");
+
+            InterceptService(service, false);
+            if (this.Runtime != null)
+            {
+                this.Runtime.RemoveService(service);
+            }
+            else
+            {
+                lock (this.servicesLock)
+                {
+                    this.services.Remove(service);
+                }
+            }
+        }
+
+        public virtual object GetService(Type serviceType)
+        {
+            if (serviceType == null)
+                throw new ArgumentNullException("serviceType");
+
+            if (this.Runtime != null)
+            {
+                return this.Runtime.GetService(serviceType);
+            }
+            else
+            {
+                lock (this.servicesLock)
+                {
+                    foreach (object service in this.services)
+                    {
+                        if (serviceType.IsAssignableFrom(service.GetType()))
+                        {
+                            return service;
+                        }
+                    }
+
+                    return null;
+                }
+            }
+        }
+
+        internal void InterceptService(object service, bool add)
+        {
+            bool isDataExchangeService = false;
+            Type[] interfaceTypes = service.GetType().GetInterfaces();
+            foreach (Type type in interfaceTypes)
+            {
+                object[] attributes = type.GetCustomAttributes(typeof(ExternalDataExchangeAttribute), false);
+                if (attributes.Length == 0)
+                    continue;
+
+                if (this.Runtime != null && this.Runtime.GetService(type) != null && add)
+                    throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, SR.GetString(SR.Error_ExternalDataExchangeServiceExists), type));
+
+                isDataExchangeService = true;
+                EventInfo[] events = type.GetEvents();
+                if (events == null)
+                    continue;
+
+                foreach (EventInfo e in events)
+                {
+                    WorkflowMessageEventHandler handler = null;
+                    int hash = type.GetHashCode() ^ e.Name.GetHashCode();
+                    lock (handlersLock)
+                    {
+                        if (!this.eventHandlers.ContainsKey(hash))
+                        {
+                            handler = new WorkflowMessageEventHandler(type, e, this.enqueueMessageWrapper);
+                            this.eventHandlers.Add(hash, handler);
+                        }
+                        else
+                        {
+                            handler = this.eventHandlers[hash];
+                        }
+                    }
+                    AddRemove(service, handler.Delegate, add, e.Name);
+                }
+            }
+            if (!isDataExchangeService)
+                throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, SR.GetString(SR.Error_ServiceMissingExternalDataExchangeInterface)));
+        }
+
+        private void AddRemove(object addedservice, Delegate delg, bool add, string eventName)
+        {
+            try
+            {
+                string eventAction;
+                if (add)
+                    eventAction = "add_" + eventName;
+                else
+                    eventAction = "remove_" + eventName;
+
+                Type serviceType = addedservice.GetType();
+                if (delg != null)
+                {
+                    // add or remove interception handler
+                    object[] del = { delg };
+                    serviceType.InvokeMember(eventAction, BindingFlags.InvokeMethod, null, addedservice, del, null);
+                }
+            }
+            catch (Exception e)
+            {
+                if (IsIrrecoverableException(e))
+                {
+                    throw;
+                }
+                // cannot intercept this event
+            }
+        }
+
+        internal static bool IsIrrecoverableException(Exception e)
+        {
+            return ((e is OutOfMemoryException) ||
+                    (e is StackOverflowException) ||
+                    (e is ThreadInterruptedException) ||
+                    (e is ThreadAbortException));
+        }
+
+        class EnqueueMessageWrapper : IDeliverMessage
+        {
+            ExternalDataExchangeService eds;
+
+            public EnqueueMessageWrapper(ExternalDataExchangeService eds)
+            {
+                this.eds = eds;
+            }
+
+            public object[] PrepareEventArgsArray(object sender, ExternalDataEventArgs eventArgs, out object workItem, out IPendingWork workHandler)
+            {
+                // remove the batch items from the event args, only the runtime needs this data
+                // and it is not necessarily serializable.
+                workItem = eventArgs.WorkItem;
+                eventArgs.WorkItem = null;
+                workHandler = eventArgs.WorkHandler;
+                eventArgs.WorkHandler = null;
+
+                return new object[] { sender, eventArgs };
+            }
+            public void DeliverMessage(ExternalDataEventArgs eventArgs, IComparable queueName, object message, object workItem, IPendingWork workHandler)
+            {
+                WorkflowInstance workflowInstance = this.eds.Runtime.GetWorkflow(eventArgs.InstanceId);
+                if (eventArgs.WaitForIdle)
+                {
+                    workflowInstance.EnqueueItemOnIdle(queueName, message, workHandler, workItem);
+                }
+                else
+                {
+                    workflowInstance.EnqueueItem(queueName, message, workHandler, workItem);
+                }
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Activities/LocalService/FollowerQueueCreator.cs

@@ -0,0 +1,70 @@
+#region Using directives
+
+using System;
+using System.Diagnostics;
+using System.Collections.Generic;
+using System.Collections;
+using System.Reflection;
+using System.Runtime.Serialization;
+using System.Workflow.ComponentModel;
+using System.Workflow.Runtime;
+using System.Workflow.Runtime.Hosting;
+using System.Runtime.Remoting.Messaging;
+
+#endregion
+
+namespace System.Workflow.Activities
+{
+    [Serializable]
+    internal sealed class FollowerQueueCreator : IActivityEventListener<QueueEventArgs>
+    {
+        string followerOperation;
+        object sync = new object();
+
+        internal FollowerQueueCreator(string operation)
+        {
+            this.followerOperation = operation;
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj == null)
+                return false;
+            FollowerQueueCreator equalsObject = obj as FollowerQueueCreator;
+            if (this.followerOperation == equalsObject.followerOperation)
+                return true;
+            return false;
+        }
+        public override int GetHashCode()
+        {
+            return this.followerOperation.GetHashCode();
+        }
+
+        #region IActivityEventListener<QueueEventArgs> Members
+
+        void IActivityEventListener<QueueEventArgs>.OnEvent(object sender, QueueEventArgs args)
+        {
+            lock (sync)
+            {
+                WorkflowQueue queue = (WorkflowQueue)sender;
+
+                // create the queue after extracting the correlation values from the message
+                EventQueueName staticId = (EventQueueName)queue.QueueName;
+                WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "FollowerQueueCreator: initialized on operation {0} for follower {1}", staticId.InterfaceType.Name + staticId.MethodName, this.followerOperation);
+
+                IMethodMessage message = queue.Peek() as IMethodMessage;
+
+                ICollection<CorrelationProperty> corrValues = CorrelationResolver.ResolveCorrelationValues(staticId.InterfaceType, staticId.MethodName, message.Args, false);
+
+                EventQueueName queueName = new EventQueueName(staticId.InterfaceType, this.followerOperation, corrValues);
+                if (!queue.QueuingService.Exists(queueName))
+                {
+                    WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "FollowerQueueCreator::CreateQueue creating q {0}", queueName.GetHashCode());
+                    queue.QueuingService.CreateWorkflowQueue(queueName, true);
+                }
+            }
+        }
+
+        #endregion
+    }
+}

mcs/class/referencesource/System.Workflow.Activities/LocalService/FollowerQueueCreator.cs.back

@@ -0,0 +1,70 @@
+#region Using directives
+
+using System;
+using System.Diagnostics;
+using System.Collections.Generic;
+using System.Collections;
+using System.Reflection;
+using System.Runtime.Serialization;
+using System.Workflow.ComponentModel;
+using System.Workflow.Runtime;
+using System.Workflow.Runtime.Hosting;
+using System.Runtime.Remoting.Messaging;
+
+#endregion
+
+namespace System.Workflow.Activities
+{
+    [Serializable]
+    internal sealed class FollowerQueueCreator : IActivityEventListener<QueueEventArgs>
+    {
+        string followerOperation;
+        object [....] = new object();
+
+        internal FollowerQueueCreator(string operation)
+        {
+            this.followerOperation = operation;
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj == null)
+                return false;
+            FollowerQueueCreator equalsObject = obj as FollowerQueueCreator;
+            if (this.followerOperation == equalsObject.followerOperation)
+                return true;
+            return false;
+        }
+        public override int GetHashCode()
+        {
+            return this.followerOperation.GetHashCode();
+        }
+
+        #region IActivityEventListener<QueueEventArgs> Members
+
+        void IActivityEventListener<QueueEventArgs>.OnEvent(object sender, QueueEventArgs args)
+        {
+            lock ([....])
+            {
+                WorkflowQueue queue = (WorkflowQueue)sender;
+
+                // create the queue after extracting the correlation values from the message
+                EventQueueName staticId = (EventQueueName)queue.QueueName;
+                WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "FollowerQueueCreator: initialized on operation {0} for follower {1}", staticId.InterfaceType.Name + staticId.MethodName, this.followerOperation);
+
+                IMethodMessage message = queue.Peek() as IMethodMessage;
+
+                ICollection<CorrelationProperty> corrValues = CorrelationResolver.ResolveCorrelationValues(staticId.InterfaceType, staticId.MethodName, message.Args, false);
+
+                EventQueueName queueName = new EventQueueName(staticId.InterfaceType, this.followerOperation, corrValues);
+                if (!queue.QueuingService.Exists(queueName))
+                {
+                    WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "FollowerQueueCreator::CreateQueue creating q {0}", queueName.GetHashCode());
+                    queue.QueuingService.CreateWorkflowQueue(queueName, true);
+                }
+            }
+        }
+
+        #endregion
+    }
+}

mcs/class/referencesource/System.Workflow.Activities/LocalService/LogicalCallContext.cs

@@ -0,0 +1,54 @@
+#region Using directives
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Runtime.Remoting.Messaging;
+using System.Runtime.Serialization;
+using System.Security;
+using System.Security.Permissions;
+using System.Security.Principal;
+#endregion
+
+namespace System.Workflow.Activities
+{
+    [Serializable]
+    internal sealed class IdentityContextData : ILogicalThreadAffinative, ISerializable
+    {
+        internal const string IdentityContext = "__identitycontext__";
+        
+        String identity;
+
+        internal IdentityContextData(String identity)
+        {
+            this.identity = identity;
+        }
+
+        private IdentityContextData(SerializationInfo info, StreamingContext context)
+        {
+            SerializationInfoEnumerator enumerator = info.GetEnumerator();
+            while (enumerator.MoveNext())
+            {
+                if (enumerator.Name.Equals("identity"))
+                {
+                    this.identity = (String)enumerator.Value;
+                }
+            }
+        }
+
+        [SecurityPermission( SecurityAction.Demand, SerializationFormatter = true)]
+        void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
+        {
+            if (this.identity != null)
+                info.AddValue("identity", identity.ToString());
+        }
+
+        internal String Identity
+        {
+            get
+            {
+                return identity;
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Activities/LocalService/MessageEventSubscriptionService.cs

@@ -0,0 +1,129 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Workflow.ComponentModel;
+using System.Workflow.Runtime;
+using System.Workflow.Runtime.Hosting;
+
+namespace System.Workflow.Activities
+{
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public abstract class WorkflowSubscriptionService
+    {
+        public abstract void CreateSubscription(MessageEventSubscription subscription);
+        public abstract void DeleteSubscription(Guid subscriptionId);
+    }
+
+    [Serializable]
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public class MessageEventSubscription
+    {
+        Type interfaceType;
+        String operation;
+        List<CorrelationProperty> predicates;
+        Guid subscriptionId;
+        Guid workflowInstanceId;
+        IComparable queueName;
+
+        protected MessageEventSubscription()
+        {
+
+        }
+
+        public MessageEventSubscription(IComparable queueName, Guid instanceId)
+            : this(queueName, instanceId, Guid.NewGuid())
+        {
+
+        }
+
+        public MessageEventSubscription(IComparable queueName, Guid instanceId, Guid subscriptionId)
+            : this(queueName, instanceId, null, null, subscriptionId)
+        {
+
+        }
+
+        public MessageEventSubscription(IComparable queueName, Guid subscriptionId, Type interfaceType, String operation)
+            : this(queueName, Guid.Empty, interfaceType, operation, subscriptionId)
+        {
+
+        }
+
+        public MessageEventSubscription(IComparable queueName, Guid instanceId, Type interfaceType, String operation, Guid subscriptionId)
+        {
+            this.queueName = queueName;
+            this.workflowInstanceId = instanceId;
+            this.subscriptionId = subscriptionId;
+            this.interfaceType = interfaceType;
+            this.operation = operation;
+            this.predicates = new List<CorrelationProperty>();
+        }
+
+        public virtual Type InterfaceType
+        {
+            get
+            {
+                return this.interfaceType;
+            }
+            set
+            {
+                this.interfaceType = value;
+            }
+        }
+
+        public virtual String MethodName
+        {
+            get
+            {
+                return this.operation;
+            }
+            set
+            {
+                this.operation = value;
+            }
+        }
+
+        public virtual ICollection<CorrelationProperty> CorrelationProperties
+        {
+            get
+            {
+                return this.predicates;
+            }
+        }
+
+        //A Unique id for this subscription. It is needed because
+        //QueueName is not always guaranteed to be Unique.
+        //Needed in case of Multiple Subscription on Same Queue
+        public virtual Guid SubscriptionId
+        {
+            get
+            {
+                return this.subscriptionId;
+            }
+        }
+
+        public virtual IComparable QueueName
+        {
+            get
+            {
+                return this.queueName;
+            }
+            protected set
+            {
+                this.queueName = value;
+            }
+        }
+
+        public virtual Guid WorkflowInstanceId
+        {
+            get
+            {
+                return this.workflowInstanceId;
+            }
+        }
+
+    }
+
+}

mcs/class/referencesource/System.Workflow.Activities/LocalService/MessageQueueKey.cs

@@ -0,0 +1,278 @@
+#pragma warning disable 1634, 1691
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+using System;
+using System.Text;
+using System.Workflow.ComponentModel;
+using System.Collections;
+using System.Collections.Generic;
+using System.Workflow.Runtime;
+
+namespace System.Workflow.Activities
+{
+    [Serializable]
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public sealed class EventQueueName : IComparable
+    {
+        Type interfaceType;
+        string operation;
+        CorrelationProperty[] correlationValues;
+        string activityId;
+
+        [NonSerialized]
+        string assemblyQualifiedName;
+
+        [NonSerialized]
+        String stringifiedKey;
+
+        private string AssemblyQualifiedName
+        {
+            get
+            {
+                if (assemblyQualifiedName == null)
+                {
+                    assemblyQualifiedName = this.interfaceType.AssemblyQualifiedName;
+                }
+                return assemblyQualifiedName;
+            }
+        }
+
+
+        public EventQueueName(Type interfaceType, string operation)
+        {
+            if (interfaceType == null)
+                throw new ArgumentNullException("interfaceType");
+            if (operation == null)
+                throw new ArgumentNullException("operation");
+
+            this.interfaceType = interfaceType;
+            this.operation = operation;
+        }
+
+        public EventQueueName(Type interfaceType, string operation, ICollection<CorrelationProperty> propertyValues)
+            : this(interfaceType, operation)
+        {
+            if (propertyValues != null)
+            {
+                this.correlationValues = new CorrelationProperty[propertyValues.Count];
+                propertyValues.CopyTo(this.correlationValues, 0);
+            }
+        }
+
+        internal EventQueueName(Type interfaceType, string operation, string activityId)
+            : this(interfaceType, operation)
+        {
+            this.activityId = activityId;
+        }
+
+        // properties
+        public Type InterfaceType
+        {
+            get
+            {
+                return this.interfaceType;
+            }
+        }
+
+        public string MethodName
+        {
+            get
+            {
+                return this.operation;
+            }
+        }
+
+        public CorrelationProperty[] GetCorrelationValues()
+        {
+            return this.correlationValues;
+        }
+
+        public int CompareTo(Object toCompare)
+        {
+            if (toCompare is EventQueueName)
+                return this.CompareTo(toCompare as EventQueueName);
+            else
+                return -1;
+        }
+
+        // IComparable implementation
+        public int CompareTo(EventQueueName eventQueueName)
+        {
+            if (eventQueueName == null)
+                return -1;
+
+            // compare operation
+            int compared = StringComparer.Ordinal.Compare(this.MethodName, eventQueueName.MethodName);
+
+            if (compared == 0)
+            {
+                // compare type names
+#pragma warning disable 56506
+                compared = StringComparer.Ordinal.Compare(AssemblyQualifiedName, eventQueueName.AssemblyQualifiedName);
+#pragma warning restore 56506
+
+                if (compared == 0)
+                {
+                    if (this.correlationValues != null)
+                    {
+                        compared = (eventQueueName.correlationValues != null) ? (this.correlationValues.Length - eventQueueName.correlationValues.Length) : -1;
+
+                        if (compared == 0)
+                        {
+                            // compare correlation values
+                            for (int i = 0; i < this.correlationValues.Length; i++)
+                            {
+                                if (this.correlationValues[i] == null || eventQueueName.correlationValues[i] == null)
+                                {
+                                    compared = -1;
+                                    break; // match failed
+                                }
+
+                                object leftValue = this.correlationValues[i].Value;
+                                object rightValue = FindCorrelationValue(this.correlationValues[i].Name, eventQueueName.correlationValues);
+
+#pragma warning suppress 56506
+                                if (leftValue == null && rightValue == null)
+                                {
+                                    continue;
+                                }
+
+                                // do the explicit equals check
+                                if (leftValue != null)
+                                {
+                                    IComparable comparable = leftValue as IComparable;
+                                    if (comparable != null)
+                                    {
+                                        compared = comparable.CompareTo(rightValue);
+                                        if (compared != 0)
+                                        {
+                                            break; // match failed
+                                        }
+                                    }
+                                    else if ((!leftValue.Equals(rightValue)))
+                                    {
+                                        compared = -1;
+                                        break; // match failed
+                                    }
+                                }
+                                else
+                                {
+                                    compared = -1;
+                                    break; // match failed
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            return compared;
+        }
+
+        public override bool Equals(object obj)
+        {
+            EventQueueName k = obj as EventQueueName;
+            //Without the cast we end up in op_Equality below
+            if ((object)k == null)
+                return false;
+
+            return 0 == CompareTo(k);
+        }
+
+        public static bool operator ==(EventQueueName queueKey1, EventQueueName queueKey2)
+        {
+            bool equality = false;
+
+            if ((object)queueKey1 != null)
+            {
+                if ((object)queueKey2 != null)
+                {
+                    equality = (0 == queueKey1.CompareTo(queueKey2));
+                }
+            }
+            else if ((object)queueKey2 == null)
+            {
+                equality = true;
+            }
+
+            return equality;
+        }
+
+        public static bool operator !=(EventQueueName queueKey1, EventQueueName queueKey2)
+        {
+            return !(queueKey1 == queueKey2);
+        }
+
+        public static bool operator <(EventQueueName queueKey1, EventQueueName queueKey2)
+        {
+            if (queueKey1 == null)
+                throw new ArgumentNullException("queueKey1");
+
+            if (queueKey2 == null)
+                throw new ArgumentNullException("queueKey2");
+
+            return (queueKey1.CompareTo(queueKey2) < 0);
+        }
+
+        public static bool operator >(EventQueueName queueKey1, EventQueueName queueKey2)
+        {
+            if (queueKey1 == null)
+                throw new ArgumentNullException("queueKey1");
+
+            if (queueKey2 == null)
+                throw new ArgumentNullException("queueKey2");
+
+            return (queueKey1.CompareTo(queueKey2) > 0);
+        }
+
+        public override int GetHashCode()
+        {
+            if (String.IsNullOrEmpty(this.activityId))
+                return (AssemblyQualifiedName.GetHashCode() ^ this.operation.GetHashCode());
+
+            return (AssemblyQualifiedName.GetHashCode() ^ this.operation.GetHashCode() ^ this.activityId.GetHashCode());
+        }
+
+        public override string ToString()
+        {
+            if (stringifiedKey == null)
+            {
+                StringBuilder stringBuilder = new StringBuilder();
+
+                stringBuilder.AppendLine("Message Properties");
+                stringBuilder.AppendLine("Interface Type:" + this.interfaceType.ToString());
+                stringBuilder.AppendLine("Method Name:" + this.operation.ToString());
+                stringBuilder.AppendLine("CorrelationValues:");
+
+                if (correlationValues != null)
+                {
+                    foreach (CorrelationProperty pred in correlationValues)
+                    {
+                        if (pred != null && pred.Value != null)
+                            stringBuilder.AppendLine(pred.Value.ToString());
+                    }
+                }
+
+                stringifiedKey = stringBuilder.ToString();
+            }
+
+            return stringifiedKey;
+        }
+
+        object FindCorrelationValue(string name, CorrelationProperty[] correlationValues)
+        {
+            object value = null;
+            foreach (CorrelationProperty property in correlationValues)
+            {
+                if (property != null && property.Name == name)
+                {
+                    value = property.Value;
+                    break;
+                }
+            }
+
+            return value;
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Activities/LocalService/MethodMessage.cs

@@ -0,0 +1,342 @@
+#pragma warning disable 1634, 1691
+using System;
+using System.Diagnostics;
+using System.Collections;
+using System.Runtime.Serialization;
+using System.Runtime.Serialization.Formatters.Binary;
+using System.Collections.Generic;
+using System.Reflection;
+using System.Runtime.Remoting.Messaging;
+using System.Workflow.Runtime;
+using System.Security.Principal;
+using System.Threading;
+using System.Globalization;
+
+namespace System.Workflow.Activities
+{
+    internal interface IMethodResponseMessage
+    {
+        void SendResponse(ICollection outArgs);
+        void SendException(Exception exception);
+        Exception Exception { get; }
+        ICollection OutArgs { get; }
+    }
+
+    [Serializable]
+    internal sealed class MethodMessage : IMethodMessage, IMethodResponseMessage
+    {
+        [NonSerialized]
+        Type interfaceType;
+        [NonSerialized]
+        string methodName;
+        [NonSerialized]
+        object[] args;
+        [NonSerialized]
+        ManualResetEvent returnValueSignalEvent;
+
+        object[] clonedArgs;
+        LogicalCallContext callContext;
+
+        ICollection outArgs;
+        Exception exception;
+
+        [NonSerialized]
+        bool responseSet = false;
+
+        Guid callbackCookie;
+
+        [NonSerialized]
+        MethodMessage previousMessage = null;
+
+        static Dictionary<Guid, MethodMessage> staticMethodMessageMap = new Dictionary<Guid, MethodMessage>();
+        static Object syncRoot = new Object();
+
+        internal MethodMessage(Type interfaceType, string methodName,
+                               object[] args, String identity) :
+            this(interfaceType, methodName, args, identity, false)
+        {
+
+        }
+
+        internal MethodMessage(Type interfaceType, string methodName,
+                               object[] args, String identity, bool responseRequired)
+        {
+            this.interfaceType = interfaceType;
+            this.methodName = methodName;
+            this.args = args;
+            callContext = GetLogicalCallContext();
+
+            if (responseRequired)
+                returnValueSignalEvent = new ManualResetEvent(false);
+
+            PopulateIdentity(callContext, identity);
+            Clone();
+        }
+
+
+
+        [OnSerializing]
+        void OnSerializing(StreamingContext context)
+        {
+            if (returnValueSignalEvent != null && !responseSet)
+            {
+                callbackCookie = Guid.NewGuid();
+
+                lock (syncRoot)
+                {
+                    staticMethodMessageMap.Add(callbackCookie, previousMessage ?? this);
+                }
+            }
+        }
+
+        [OnDeserialized]
+        void OnDeserialized(StreamingContext context)
+        {
+            if (callbackCookie != Guid.Empty)
+            {
+                lock (syncRoot)
+                {
+                    if (staticMethodMessageMap.TryGetValue(callbackCookie, out previousMessage))
+                        staticMethodMessageMap.Remove(callbackCookie);
+                }
+
+                if (previousMessage != null)
+                {
+                    this.responseSet = previousMessage.responseSet;
+                    this.returnValueSignalEvent = previousMessage.returnValueSignalEvent;
+                }
+            }
+
+            callbackCookie = Guid.Empty;
+        }
+
+        string IMethodMessage.GetArgName(int index)
+        {
+            throw new NotImplementedException();
+        }
+
+        object IMethodMessage.GetArg(int argNum)
+        {
+            return this.clonedArgs[argNum];
+        }
+
+        string IMethodMessage.Uri
+        {
+#pragma warning disable 56503
+            // not implemented
+            get { throw new NotImplementedException(); }
+#pragma warning restore 56503
+        }
+
+        string IMethodMessage.MethodName
+        {
+            get { return this.methodName; }
+        }
+
+        string IMethodMessage.TypeName
+        {
+            get
+            {
+                return (this.interfaceType.ToString());
+            }
+        }
+
+        object IMethodMessage.MethodSignature
+        {
+#pragma warning disable 56503
+            get { throw new NotImplementedException(); }
+#pragma warning restore 56503
+        }
+
+        object[] IMethodMessage.Args
+        {
+            get
+            {
+                return this.clonedArgs;
+            }
+        }
+
+        object Clone()
+        {
+            object[] clones = new object[this.args.Length];
+
+            for (int i = 0; i < this.args.Length; i++)
+            {
+                clones[i] = Clone(this.args[i]);
+            }
+            this.clonedArgs = clones;
+            return clones;
+        }
+
+        object Clone(object source)
+        {
+            if (source == null || source.GetType().IsValueType)
+                return source;
+
+            ICloneable clone = source as ICloneable;
+            if (clone != null)
+                return clone.Clone();
+
+            BinaryFormatter formatter = new BinaryFormatter();
+            System.IO.MemoryStream stream = new System.IO.MemoryStream(1024);
+            try
+            {
+                formatter.Serialize(stream, source);
+            }
+            catch (SerializationException e)
+            {
+                throw new InvalidOperationException(SR.GetString(SR.Error_EventArgumentSerializationException), e);
+            }
+            stream.Position = 0;
+            object cloned = formatter.Deserialize(stream);
+            return cloned;
+        }
+
+        int IMethodMessage.ArgCount
+        {
+            get { return this.clonedArgs.Length; }
+        }
+
+        bool IMethodMessage.HasVarArgs
+        {
+#pragma warning disable 56503
+            get { throw new NotImplementedException(); }
+#pragma warning restore 56503
+        }
+
+        LogicalCallContext IMethodMessage.LogicalCallContext
+        {
+            get { return callContext; }
+        }
+
+        MethodBase IMethodMessage.MethodBase
+        {
+#pragma warning disable 56503
+            get { throw new NotImplementedException(); }
+#pragma warning restore 56503
+        }
+
+        IDictionary System.Runtime.Remoting.Messaging.IMessage.Properties
+        {
+#pragma warning disable 56503
+            get { throw new NotImplementedException(); }
+#pragma warning restore 56503
+        }
+
+        void PopulateIdentity(LogicalCallContext callContext, String identity)
+        {
+            callContext.SetData(IdentityContextData.IdentityContext, new IdentityContextData(identity));
+        }
+
+        static LogicalCallContext singletonCallContext;
+        static Object syncObject = new Object();
+
+        static LogicalCallContext GetLogicalCallContext()
+        {
+            lock (syncObject)
+            {
+                if (singletonCallContext == null)
+                {
+                    CallContextProxy contextProxy = new CallContextProxy(typeof(IDisposable));
+                    IDisposable disposable = (IDisposable)contextProxy.GetTransparentProxy();
+                    disposable.Dispose();
+                    singletonCallContext = contextProxy.CallContext;
+                }
+                return singletonCallContext.Clone() as LogicalCallContext;
+            }
+        }
+
+        #region IMethodResponseMessage implementation
+
+        internal IMethodResponseMessage WaitForResponseMessage()
+        {
+            // todo wait for certain timeout
+            this.returnValueSignalEvent.WaitOne();
+            this.returnValueSignalEvent = null;
+            return this;
+        }
+
+        public void SendResponse(ICollection outArgs)
+        {
+            if (this.returnValueSignalEvent == null)
+                throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, SR.GetString(SR.Error_WorkflowInstanceDehydratedBeforeSendingResponse)));
+
+            if (!this.responseSet)
+            {
+                this.OutArgs = outArgs;
+                this.returnValueSignalEvent.Set();
+                this.responseSet = true;
+            }
+        }
+
+        public void SendException(Exception exception)
+        {
+            if (this.returnValueSignalEvent == null)
+                throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, SR.GetString(SR.Error_WorkflowInstanceDehydratedBeforeSendingResponse)));
+
+            if (!this.responseSet)
+            {
+                this.Exception = exception;
+                this.returnValueSignalEvent.Set();
+                this.responseSet = true;
+            }
+        }
+
+        public Exception Exception
+        {
+            get
+            {
+                return this.exception;
+            }
+            private set
+            {
+                if (previousMessage != null)
+                    previousMessage.Exception = value;
+
+                this.exception = value;
+            }
+        }
+
+        public ICollection OutArgs
+        {
+            get
+            {
+                return this.outArgs;
+            }
+            private set
+            {
+                if (previousMessage != null)
+                    previousMessage.OutArgs = value;
+
+                this.outArgs = value;
+            }
+        }
+        #endregion
+
+        private sealed class CallContextProxy : System.Runtime.Remoting.Proxies.RealProxy
+        {
+            LogicalCallContext callContext;
+
+            internal LogicalCallContext CallContext
+            {
+                get
+                {
+                    return callContext;
+                }
+            }
+
+            internal CallContextProxy(Type proxiedType)
+                : base(proxiedType)
+            {
+
+            }
+
+            public override System.Runtime.Remoting.Messaging.IMessage Invoke(System.Runtime.Remoting.Messaging.IMessage msg)
+            {
+                IMethodCallMessage methodCallMessage = msg as IMethodCallMessage;
+                this.callContext = methodCallMessage.LogicalCallContext.Clone() as LogicalCallContext;
+                return new ReturnMessage(null, null, 0, methodCallMessage.LogicalCallContext, methodCallMessage);
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Activities/LocalService/WorkflowMessageEventArgs.cs

@@ -0,0 +1,176 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+#region Using directives
+
+using System;
+using System.Diagnostics;
+using System.Collections;
+using System.Reflection;
+using System.Runtime.Serialization;
+using System.Workflow.ComponentModel;
+using System.Workflow.Runtime;
+using System.Workflow.Runtime.Hosting;
+using System.Security.Principal;
+
+#endregion
+
+namespace System.Workflow.Activities
+{
+    [AttributeUsageAttribute(AttributeTargets.Interface, AllowMultiple = false, Inherited = false)]
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public sealed class ExternalDataExchangeAttribute : Attribute
+    {
+    }
+
+
+    [AttributeUsageAttribute(AttributeTargets.Event | AttributeTargets.Method, AllowMultiple = false)]
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public sealed class CorrelationInitializerAttribute : Attribute
+    {
+    }
+
+    [AttributeUsageAttribute(AttributeTargets.Interface, AllowMultiple = true)]
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public sealed class CorrelationParameterAttribute : Attribute
+    {
+        private string name = string.Empty;
+        public CorrelationParameterAttribute(string name)
+        {
+            this.name = name;
+        }
+
+        public string Name
+        {
+            get
+            {
+                return this.name;
+            }
+        }
+    }
+
+    [AttributeUsageAttribute(AttributeTargets.Delegate | AttributeTargets.Event | AttributeTargets.Method, AllowMultiple = true)]
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public sealed class CorrelationAliasAttribute : Attribute
+    {
+        private string path;
+        private string name;
+
+        public CorrelationAliasAttribute(String name, String path)
+        {
+            this.path = path;
+            this.name = name;
+        }
+
+        public String Name
+        {
+            get
+            {
+                return this.name;
+            }
+        }
+
+        public String Path
+        {
+            get
+            {
+                return path;
+            }
+        }
+    }
+
+    [Serializable]
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public class ExternalDataEventArgs : EventArgs
+    {
+        Guid instanceId;
+        object batchworkItem;
+        IPendingWork batchworkHandler;
+        String identity;
+        bool waitForIdle;
+
+        public ExternalDataEventArgs()
+            : this(Guid.Empty, null, null, false)
+        {
+        }
+
+        public ExternalDataEventArgs(Guid instanceId)
+            : this(instanceId, null, null, false)
+        {
+        }
+
+        public ExternalDataEventArgs(Guid instanceId, IPendingWork workHandler, object workItem, bool waitForIdle)
+        {
+            this.instanceId = instanceId;
+            this.batchworkHandler = workHandler;
+            this.batchworkItem = workItem;
+            this.waitForIdle = waitForIdle;
+        }
+
+        public ExternalDataEventArgs(Guid instanceId, IPendingWork workHandler, object workItem)
+            : this(instanceId, workHandler, workItem, false)
+        {
+        }
+
+        public Guid InstanceId
+        {
+            get
+            {
+                return this.instanceId;
+            }
+            set
+            {
+                this.instanceId = value;
+            }
+        }
+
+        public object WorkItem
+        {
+            get
+            {
+                return this.batchworkItem;
+            }
+            set
+            {
+                this.batchworkItem = value;
+            }
+        }
+
+        public IPendingWork WorkHandler
+        {
+            get
+            {
+                return this.batchworkHandler;
+            }
+            set
+            {
+                this.batchworkHandler = value;
+            }
+        }
+
+        public String Identity
+        {
+            get
+            {
+                return this.identity;
+            }
+            set
+            {
+                this.identity = value;
+            }
+        }
+
+        public bool WaitForIdle
+        {
+            get
+            {
+                return this.waitForIdle;
+            }
+            set
+            {
+                this.waitForIdle = value;
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Activities/LocalService/WorkflowMessageEventHandler.cs

@@ -0,0 +1,161 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+using System;
+using System.Diagnostics;
+using System.Collections;
+using System.Collections.Generic;
+using System.Reflection;
+using System.Workflow.ComponentModel;
+using System.Workflow.Runtime;
+using System.Workflow.Runtime.Hosting;
+using System.Security.Principal;
+using System.Runtime.Serialization;
+
+namespace System.Workflow.Activities
+{
+    [Serializable]
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public sealed class EventDeliveryFailedException : SystemException
+    {
+        public EventDeliveryFailedException()
+        {
+
+        }
+
+        public EventDeliveryFailedException(String message)
+            : base(message)
+        {
+
+        }
+
+        public EventDeliveryFailedException(String message, Exception innerException)
+            : base(message, innerException)
+        {
+
+        }
+
+        private EventDeliveryFailedException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+
+    [Serializable]
+    internal sealed class WorkflowMessageEventHandler
+    {
+        Type proxiedType;
+        string eventName;
+        [NonSerialized]
+        Type eventHandlerType;
+        [NonSerialized]
+        IDeliverMessage enqueueWrapper;
+
+        internal WorkflowMessageEventHandler(Type proxiedType, EventInfo eventInfo, IDeliverMessage enqueueWrapper)
+        {
+            this.proxiedType = proxiedType;
+            this.eventName = eventInfo.Name;
+            this.eventHandlerType = eventInfo.EventHandlerType;
+            this.enqueueWrapper = enqueueWrapper;
+        }
+
+        internal IDeliverMessage EnqueueWrapper
+        {
+            get
+            {
+                return this.enqueueWrapper;
+            }
+            set
+            {
+                if (value == null)
+                {
+                    throw new ArgumentNullException("value");
+                }
+                this.enqueueWrapper = value;
+            }
+        }
+
+        internal Delegate Delegate
+        {
+            get
+            {
+                MethodInfo interceptedHandler = this.eventHandlerType.GetMethod("Invoke");
+                ParameterInfo[] parameters = interceptedHandler.GetParameters();
+                bool isValidParameter = false;
+                if (parameters.Length == 2)
+                {
+                    if (parameters[1].ParameterType.IsSubclassOf(typeof(ExternalDataEventArgs))
+                        || parameters[1].ParameterType == (typeof(ExternalDataEventArgs)))
+                        isValidParameter = true;
+                }
+
+                if (isValidParameter)
+                {
+                    MethodInfo mHandler = typeof(WorkflowMessageEventHandler).GetMethod("EventHandler");
+                    return (Delegate)Activator.CreateInstance(eventHandlerType, new object[] { this, mHandler.MethodHandle.GetFunctionPointer() });
+                }
+
+                return null;
+            }
+        }
+
+        public void EventHandler(object sender, ExternalDataEventArgs eventArgs)
+        {
+            if (eventArgs == null)
+            {
+                throw new ArgumentNullException("eventArgs");
+            }
+
+            try
+            {
+                object workItem;
+                IPendingWork workHandler;
+                object[] args = this.enqueueWrapper.PrepareEventArgsArray(sender, eventArgs, out workItem, out workHandler);
+                EventQueueName key = GetKey(args);
+
+                String securityIdentifier = null;
+                if (eventArgs.Identity == null)
+                {
+                    IIdentity identity = System.Threading.Thread.CurrentPrincipal.Identity;
+                    WindowsIdentity windowsIdentity = identity as WindowsIdentity;
+                    if (windowsIdentity != null && windowsIdentity.User != null)
+                        securityIdentifier = windowsIdentity.User.Translate(typeof(NTAccount)).ToString();
+                    else if (identity != null)
+                        securityIdentifier = identity.Name;
+
+                    eventArgs.Identity = securityIdentifier;
+                }
+                else
+                {
+                    securityIdentifier = eventArgs.Identity;
+                }
+
+                MethodMessage message = new MethodMessage(this.proxiedType, this.eventName, args, securityIdentifier);
+
+                WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "Firing event {0} for instance {1}", this.eventName, eventArgs.InstanceId);
+
+                this.enqueueWrapper.DeliverMessage(eventArgs, key, message, workItem, workHandler);
+            }
+            catch (Exception e)
+            {
+                if (ExternalDataExchangeService.IsIrrecoverableException(e))
+                {
+                    throw;
+                }
+                else
+                {
+                    throw new EventDeliveryFailedException(SR.GetString(SR.Error_EventDeliveryFailedException, this.proxiedType, this.eventName, eventArgs.InstanceId), e);
+                }
+            }
+        }
+
+        private EventQueueName GetKey(object[] eventArgs)
+        {
+            bool provideInitializerTokens = CorrelationResolver.IsInitializingMember(this.proxiedType, this.eventName, eventArgs);
+
+            ICollection<CorrelationProperty> predicates = CorrelationResolver.ResolveCorrelationValues(this.proxiedType, this.eventName, eventArgs, provideInitializerTokens);
+            return new EventQueueName(this.proxiedType, this.eventName, predicates);
+        }
+    }
+}