Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Activities.DurableInstancing/AssemblyInfo.cs

@@ -0,0 +1,30 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Security;
+using System;
+using System.Security.Permissions;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("3C5386D5-54BD-49dc-AFCC-A46EAE3545DB")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Revision and Build Numbers 
+// by using the '*' as shown below:
+// Friend assemblies
+
+// Partial Trust :

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/BinaryHeap.cs

@@ -0,0 +1,246 @@
+//----------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//----------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Diagnostics.CodeAnalysis;
+    using System.Runtime;
+
+    sealed class BinaryHeap<TKey, TValue> where TKey : IComparable<TKey>
+    {
+        const int defaultCapacity = 128;
+        readonly KeyValuePair<TKey, TValue> EmptyItem = new KeyValuePair<TKey, TValue>();
+        KeyValuePair<TKey, TValue>[] items;
+        int itemCount;
+
+        public BinaryHeap() :
+            this(defaultCapacity)
+        {
+        }
+
+        public BinaryHeap(int capacity)
+        {
+            Fx.Assert(capacity > 0, "Capacity must be a positive value.");
+            this.items = new KeyValuePair<TKey, TValue>[capacity];
+        }
+
+        public int Count
+        {
+            get { return this.itemCount; }
+        }
+
+        public bool IsEmpty
+        {
+            get { return this.itemCount == 0; }
+        }
+
+        public void Clear()
+        {
+            this.itemCount = 0;
+            this.items = new KeyValuePair<TKey, TValue>[defaultCapacity];
+        }
+
+        public bool Enqueue(TKey key, TValue item)
+        {
+            if (this.itemCount == this.items.Length)
+            {
+                ResizeItemStore(this.items.Length * 2);
+            }
+
+            this.items[this.itemCount++] = new KeyValuePair<TKey, TValue>(key, item);
+            int position = this.BubbleUp(this.itemCount - 1);
+
+            return (position == 0);
+        }
+
+        public KeyValuePair<TKey, TValue> Dequeue()
+        {
+            return Dequeue(true);
+        }
+
+        KeyValuePair<TKey, TValue> Dequeue(bool shrink)
+        {
+            Fx.Assert(this.itemCount > 0, "Cannot dequeue empty queue.");
+
+            KeyValuePair<TKey, TValue> result = items[0];
+
+            if (this.itemCount == 1)
+            {
+                this.itemCount = 0;
+                this.items[0] = this.EmptyItem;
+            }
+            else
+            {
+                --this.itemCount;
+                this.items[0] = this.items[itemCount];
+                this.items[itemCount] = this.EmptyItem;
+
+                // Keep the structure of the heap valid.
+                this.BubbleDown(0);
+            }
+
+            if (shrink)
+            {
+                ShrinkStore();
+            }
+
+            return result;
+        }
+
+        public KeyValuePair<TKey, TValue> Peek()
+        {
+            Fx.Assert(this.itemCount > 0, "Cannot peek at empty queue.");
+            return this.items[0];
+        }
+
+        [SuppressMessage(FxCop.Category.Design, "CA1006:DoNotNestGenericTypesInMemberSignatures",
+            Justification = "This is an internal only API.")]
+        [SuppressMessage(FxCop.Category.MSInternal, "CA908:UseApprovedGenericsForPrecompiledAssemblies")]
+        public ICollection<KeyValuePair<TKey, TValue>> RemoveAll(Predicate<KeyValuePair<TKey, TValue>> func)
+        {
+            ICollection<KeyValuePair<TKey, TValue>> result = new List<KeyValuePair<TKey, TValue>>();
+
+            for (int position = 0; position < this.itemCount; position++)
+            {
+                while (func(this.items[position]) && position < this.itemCount)
+                {
+                    result.Add(this.items[position]);
+
+                    int lastItem = this.itemCount - 1;
+
+                    while (func(this.items[lastItem]) && position < lastItem)
+                    {
+                        result.Add(this.items[lastItem]);
+                        this.items[lastItem] = EmptyItem;
+                        --lastItem;
+                    }
+
+                    this.items[position] = this.items[lastItem];
+                    this.items[lastItem] = EmptyItem;
+                    this.itemCount = lastItem;
+
+                    if (position < lastItem)
+                    {
+                        this.BubbleDown(this.BubbleUp(position));
+                    }
+                }
+            }
+
+            this.ShrinkStore();
+
+            return result;
+        }
+
+        void ShrinkStore()
+        {
+            // If we are under half capacity and above default capacity size down.
+            if (this.items.Length > defaultCapacity && this.itemCount < (this.items.Length >> 1))
+            {
+                int newSize = Math.Max(
+                    defaultCapacity, (((this.itemCount / defaultCapacity) + 1) * defaultCapacity));
+
+                this.ResizeItemStore(newSize);
+            }
+        }
+
+        [SuppressMessage("Microsoft.MSInternal", "CA908:UseApprovedGenericsForPrecompiledAssemblies")]
+        [SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures",
+            Justification = "This is an internal only API.")]
+        public ICollection<KeyValuePair<TKey, TValue>> TakeWhile(Predicate<TKey> func)
+        {
+            ICollection<KeyValuePair<TKey, TValue>> result = new List<KeyValuePair<TKey, TValue>>();
+
+            while (!this.IsEmpty && func(this.Peek().Key))
+            {
+                result.Add(this.Dequeue(false));
+            }
+
+            ShrinkStore();
+
+            return result;
+        }
+
+        void ResizeItemStore(int newSize)
+        {
+            Fx.Assert(itemCount < newSize, "Shrinking now will lose data.");
+            Fx.Assert(defaultCapacity <= newSize, "Can not shrink below the default capacity.");
+
+            KeyValuePair<TKey, TValue>[] temp = new KeyValuePair<TKey, TValue>[newSize];
+
+            Array.Copy(this.items, 0, temp, 0, this.itemCount);
+
+            this.items = temp;
+        }
+
+        void BubbleDown(int startIndex)
+        {
+            int currentPosition = startIndex;
+            int swapPosition = startIndex;
+
+            while (true)
+            {
+                int leftChildPosition = (currentPosition << 1) + 1;
+                int rightChildPosition = leftChildPosition + 1;
+
+                if (leftChildPosition < itemCount)
+                {
+                    if (this.items[currentPosition].Key.CompareTo(this.items[leftChildPosition].Key) > 0)
+                    {
+                        swapPosition = leftChildPosition;
+                    }
+                }
+                else
+                {
+                    break;
+                }
+
+                if (rightChildPosition < itemCount)
+                {
+                    if (this.items[swapPosition].Key.CompareTo(this.items[rightChildPosition].Key) > 0)
+                    {
+                        swapPosition = rightChildPosition;
+                    }
+                }
+
+                if (currentPosition != swapPosition)
+                {
+                    KeyValuePair<TKey, TValue> temp = this.items[currentPosition];
+                    this.items[currentPosition] = this.items[swapPosition];
+                    this.items[swapPosition] = temp;
+                }
+                else
+                {
+                    break;
+                }
+
+                currentPosition = swapPosition;
+            }
+        }
+
+        int BubbleUp(int startIndex)
+        {
+            while (startIndex > 0)
+            {
+                int parent = (startIndex - 1) >> 1;
+
+                if (this.items[parent].Key.CompareTo(this.items[startIndex].Key) > 0)
+                {
+                    KeyValuePair<TKey, TValue> temp = this.items[startIndex];
+                    this.items[startIndex] = this.items[parent];
+                    this.items[parent] = temp;
+                }
+                else
+                {
+                    break;
+                }
+
+                startIndex = parent;
+            }
+
+            return startIndex;
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/CommandResult.cs

@@ -0,0 +1,26 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    enum CommandResult
+    {
+        Success = 0,
+        InstanceNotFound = 1,
+        InstanceLockNotAcquired = 2,
+        KeyAlreadyExists = 3,
+        KeyNotFound = 4,
+        InstanceAlreadyExists = 5,
+        InstanceLockLost = 6,
+        InstanceCompleted = 7,
+        KeyDisassociated = 8,
+        StaleInstanceVersion = 10,
+        HostLockExpired = 11,
+        HostLockNotFound = 12,
+        CleanupInProgress = 13,
+        InstanceAlreadyLockedToOwner = 14,
+        IdentityNotFound = 15,
+        Unknown = 99
+    };
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/CorrelationKey.cs

@@ -0,0 +1,98 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Globalization;
+    using System.Linq;
+    using System.Runtime;
+    using System.Xml;
+    using System.Xml.Linq;
+    using System.Xml.Serialization;
+    using System.Runtime.DurableInstancing;
+
+    sealed class CorrelationKey
+    {
+        public CorrelationKey(Guid keyId) 
+            : this(keyId, null, InstanceEncodingOption.None)
+        {
+        }
+
+        public CorrelationKey(Guid keyId, IDictionary<XName, InstanceValue> keyMetadata, InstanceEncodingOption encodingOption)
+        {
+            this.KeyId = keyId;
+            this.BinaryData = SerializationUtilities.SerializeKeyMetadata(keyMetadata, encodingOption);
+        }
+
+        public Guid KeyId
+        {
+            get;
+            set;
+        }
+
+        public long StartPosition
+        {
+            get;
+            set;
+        }
+
+        public ArraySegment<byte> BinaryData
+        {
+            get;
+            set;
+        }
+
+        public void SerializeToXmlElement(XmlWriter xmlWriter)
+        {
+            xmlWriter.WriteStartElement("CorrelationKey");
+            xmlWriter.WriteAttributeString("KeyId", this.KeyId.ToString());
+
+            if (this.BinaryData.Array != null)
+            {
+                xmlWriter.WriteAttributeString("StartPosition", this.StartPosition.ToString(CultureInfo.InvariantCulture));
+                xmlWriter.WriteAttributeString("BinaryLength", this.BinaryData.Count.ToString(CultureInfo.InvariantCulture));
+            }
+
+            xmlWriter.WriteEndElement();
+        }
+
+        public static List<CorrelationKey> BuildKeyList(ICollection<Guid> keys)
+        {
+            List<CorrelationKey> result = null;
+
+            if (keys != null)
+            {
+                result = new List<CorrelationKey>(keys.Count);
+
+                foreach (Guid guid in keys)
+                {
+                    result.Add(new CorrelationKey(guid));
+                }
+            }
+            else
+            {
+                result = new List<CorrelationKey>();
+            }
+
+            return result;
+        }
+
+        public static List<CorrelationKey> BuildKeyList(IDictionary<Guid, IDictionary<XName, InstanceValue>> keys, InstanceEncodingOption encodingOption)
+        {
+            List<CorrelationKey> result = new List<CorrelationKey>();
+
+            if (keys != null)
+            {
+                foreach (KeyValuePair<Guid, IDictionary<XName, InstanceValue>> keyValuePair in keys)
+                {
+                    result.Add(new CorrelationKey(keyValuePair.Key, keyValuePair.Value, encodingOption));
+                }
+            }
+
+            return result;
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/CreateWorkflowOwnerAsyncResult.cs

@@ -0,0 +1,178 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System.Activities.Persistence;
+    using System.Collections.Generic;
+    using System.Collections.ObjectModel;
+    using System.Data;
+    using System.Data.SqlClient;
+    using System.Globalization;
+    using System.Linq;
+    using System.Runtime;
+    using System.Runtime.DurableInstancing;
+    using System.Security.Cryptography;
+    using System.Text;
+    using System.Transactions;
+    using System.Xml.Linq;
+
+    sealed class CreateWorkflowOwnerAsyncResult : WorkflowOwnerAsyncResult
+    {
+        static readonly string commandText = string.Format(CultureInfo.InvariantCulture, "{0}.[CreateLockOwner]", SqlWorkflowInstanceStoreConstants.DefaultSchema);
+        bool fireActivatableInstancesEvent;
+        bool fireRunnableInstancesEvent;
+        Guid lockOwnerId;
+
+        public CreateWorkflowOwnerAsyncResult
+            (
+            InstancePersistenceContext context,
+            InstancePersistenceCommand command,
+            SqlWorkflowInstanceStore store,
+            SqlWorkflowInstanceStoreLock storeLock,
+            Transaction currentTransaction,
+            TimeSpan timeout,
+            AsyncCallback callback,
+            object state
+            ) :
+            base(context, command, store, storeLock, currentTransaction, timeout, callback, state)
+        {
+        }
+
+        protected override string ConnectionString
+        {
+            get
+            {
+                // by making CreateWorkflowOwnerAsyncResult to use the same Connection Pool as the PersistenceTasks(LockRenewalTask, etc),
+                // we can prevent unbound bloating of new threads created for task dispatching blocked on the busy Connection Pool.
+                // If the Connection Pool is too busy to handle pending tasks, then any incoming CreateWorkflowOwnerAsyncResult will also block on the Connection Pool too.
+                SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder(base.Store.CachedConnectionString);
+                builder.ApplicationName = SqlWorkflowInstanceStore.CommonConnectionPoolName;
+                return builder.ToString();
+            }
+        }
+
+        protected override void GenerateSqlCommand(SqlCommand sqlCommand)
+        {
+            base.GenerateSqlCommand(sqlCommand);
+
+            if (base.StoreLock.IsValid)
+            {
+                throw FxTrace.Exception.AsError(new InstancePersistenceCommandException(SR.MultipleLockOwnersNotSupported));
+            }
+
+            bool withIdentity;
+            IDictionary<XName, InstanceValue> commandMetadata = GetCommandMetadata(out withIdentity);
+            SqlParameterCollection parameters = sqlCommand.Parameters;
+            double lockTimeout = base.Store.BufferedHostLockRenewalPeriod.TotalSeconds;
+            this.lockOwnerId = Guid.NewGuid();
+            ExtractWorkflowHostType(commandMetadata);
+
+            InstanceValue instanceValue;
+            if (commandMetadata.TryGetValue(PersistenceMetadataNamespace.ActivationType, out instanceValue))
+            {
+                if (withIdentity)
+                {
+                    throw FxTrace.Exception.AsError(new InstancePersistenceCommandException(SR.IdentityNotSupportedWithActivation));
+                }
+                if (!PersistenceMetadataNamespace.ActivationTypes.WAS.Equals(instanceValue.Value))
+                {
+                    throw FxTrace.Exception.AsError(new InstancePersistenceCommandException(SR.NonWASActivationNotSupported));
+                }
+                this.fireActivatableInstancesEvent = true;
+            }
+
+            ArraySegment<byte>[] properties = SerializationUtilities.SerializePropertyBag(commandMetadata, base.Store.InstanceEncodingOption);
+
+            parameters.Add(new SqlParameter { ParameterName = "@lockTimeout", SqlDbType = SqlDbType.Int, Value = lockTimeout });
+            parameters.Add(new SqlParameter { ParameterName = "@lockOwnerId", SqlDbType = SqlDbType.UniqueIdentifier, Value = this.lockOwnerId });
+            parameters.Add(new SqlParameter { ParameterName = "@workflowHostType", SqlDbType = SqlDbType.UniqueIdentifier, Value = (base.Store.WorkflowHostType != Guid.Empty) ? base.Store.WorkflowHostType : (object) DBNull.Value });
+            parameters.Add(new SqlParameter { ParameterName = "@enqueueCommand", SqlDbType = SqlDbType.Bit, Value = base.Store.EnqueueRunCommands });
+            parameters.Add(new SqlParameter { ParameterName = "@deleteInstanceOnCompletion", SqlDbType = SqlDbType.Bit, Value = (base.Store.InstanceCompletionAction == InstanceCompletionAction.DeleteAll) });
+            parameters.Add(new SqlParameter { ParameterName = "@primitiveLockOwnerData", SqlDbType = SqlDbType.VarBinary, Size = properties[0].Count, Value = (object)(properties[0].Array) ?? DBNull.Value });
+            parameters.Add(new SqlParameter { ParameterName = "@complexLockOwnerData", SqlDbType = SqlDbType.VarBinary, Size = properties[1].Count, Value = (object)(properties[1].Array) ?? DBNull.Value });
+            parameters.Add(new SqlParameter { ParameterName = "@writeOnlyPrimitiveLockOwnerData", SqlDbType = SqlDbType.VarBinary, Size = properties[2].Count, Value = (object)(properties[2].Array) ?? DBNull.Value });
+            parameters.Add(new SqlParameter { ParameterName = "@writeOnlyComplexLockOwnerData", SqlDbType = SqlDbType.VarBinary, Size = properties[3].Count, Value = (object)(properties[3].Array) ?? DBNull.Value });
+            parameters.Add(new SqlParameter { ParameterName = "@encodingOption", SqlDbType = SqlDbType.TinyInt, Value = base.Store.InstanceEncodingOption });
+            parameters.Add(new SqlParameter { ParameterName = "@machineName", SqlDbType = SqlDbType.NVarChar, Value = SqlWorkflowInstanceStoreConstants.MachineName });
+
+            if (withIdentity)
+            {
+                Fx.Assert(base.Store.DatabaseVersion >= StoreUtilities.Version45, "Should never get here if the db version isn't 4.5 or higher");
+
+                string identityMetadataXml = SerializationUtilities.GetIdentityMetadataXml(base.InstancePersistenceCommand);
+                parameters.Add(new SqlParameter { ParameterName = "@identityMetadata", SqlDbType = SqlDbType.Xml, Value = identityMetadataXml });
+            }
+        }
+
+        protected override string GetSqlCommandText()
+        {
+            return CreateWorkflowOwnerAsyncResult.commandText;
+        }
+
+        protected override CommandType GetSqlCommandType()
+        {
+            return CommandType.StoredProcedure;
+        }
+
+        protected override Exception ProcessSqlResult(SqlDataReader reader)
+        {
+            Exception exception = StoreUtilities.GetNextResultSet(this.InstancePersistenceCommand.Name, reader);
+
+            if (exception == null)
+            {
+                base.InstancePersistenceContext.BindInstanceOwner(this.lockOwnerId, this.lockOwnerId);
+                long surrogateLockOwnerId = reader.GetInt64(1);
+
+                // Activatable takes precendence over Runnable.  (Activation owners cannot run instances.)
+                if (this.fireActivatableInstancesEvent)
+                {
+                    base.InstancePersistenceContext.BindEvent(HasActivatableWorkflowEvent.Value);
+                }
+                else if (this.fireRunnableInstancesEvent)
+                {
+                    base.InstancePersistenceContext.BindEvent(HasRunnableWorkflowEvent.Value);
+                }
+
+                base.StoreLock.MarkInstanceOwnerCreated(this.lockOwnerId, surrogateLockOwnerId, base.InstancePersistenceContext.InstanceHandle, this.fireRunnableInstancesEvent, this.fireActivatableInstancesEvent);
+            }
+
+            return exception;
+        }
+
+        void ExtractWorkflowHostType(IDictionary<XName, InstanceValue> commandMetadata)
+        {
+            InstanceValue instanceValue;
+            if (commandMetadata.TryGetValue(WorkflowNamespace.WorkflowHostType, out instanceValue))
+            {
+                XName workflowHostType = instanceValue.Value as XName;
+
+                if (workflowHostType == null)
+                {
+                    throw FxTrace.Exception.AsError(new InstancePersistenceCommandException(SR.InvalidMetadataValue(WorkflowNamespace.WorkflowHostType, typeof(XName).Name)));
+                }
+
+                byte[] workflowHostTypeBuffer = Encoding.Unicode.GetBytes(workflowHostType.ToString());
+                base.Store.WorkflowHostType = new Guid(HashHelper.ComputeHash(workflowHostTypeBuffer));
+                this.fireRunnableInstancesEvent = true;
+            }
+        }
+
+        IDictionary<XName, InstanceValue> GetCommandMetadata(out bool withIdentity)
+        {
+            CreateWorkflowOwnerWithIdentityCommand createOwnerWithIdentityCommand = base.InstancePersistenceCommand as CreateWorkflowOwnerWithIdentityCommand;
+            if (createOwnerWithIdentityCommand != null)
+            {
+                withIdentity = true;
+                return createOwnerWithIdentityCommand.InstanceOwnerMetadata;
+            }
+            else
+            {
+                CreateWorkflowOwnerCommand createOwnerCommand = (CreateWorkflowOwnerCommand)base.InstancePersistenceCommand;
+                withIdentity = false;
+                return createOwnerCommand.InstanceOwnerMetadata;
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/DefaultObjectSerializer.cs

@@ -0,0 +1,113 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System;
+    using System.Collections;
+    using System.Collections.Generic;
+    using System.IO;
+    using System.Runtime.Serialization;
+    using System.Xml;
+    using System.Xml.Linq;
+    using System.Xml.Serialization;
+
+    class DefaultObjectSerializer : IObjectSerializer
+    {
+        NetDataContractSerializer serializer;
+
+        public DefaultObjectSerializer()
+        {
+            this.serializer = new NetDataContractSerializer();
+        }
+
+        public Dictionary<XName, object> DeserializePropertyBag(byte[] serializedValue)
+        {
+            using (MemoryStream memoryStream = new MemoryStream(serializedValue))
+            {
+                return this.DeserializePropertyBag(memoryStream);
+            }
+        }
+
+        public object DeserializeValue(byte[] serializedValue)
+        {
+            using (MemoryStream memoryStream = new MemoryStream(serializedValue))
+            {
+                return this.DeserializeValue(memoryStream);
+            }
+        }
+
+        public ArraySegment<byte> SerializePropertyBag(Dictionary<XName, object> value)
+        {
+            using (MemoryStream memoryStream = new MemoryStream(4096))
+            {
+                this.SerializePropertyBag(memoryStream, value);
+                return new ArraySegment<byte>(memoryStream.GetBuffer(), 0, Convert.ToInt32(memoryStream.Length));
+            }
+        }
+
+        public ArraySegment<byte> SerializeValue(object value)
+        {
+            using (MemoryStream memoryStream = new MemoryStream(4096))
+            {
+                this.SerializeValue(memoryStream, value);
+                return new ArraySegment<byte>(memoryStream.GetBuffer(), 0, Convert.ToInt32(memoryStream.Length));
+            }
+        }
+
+        protected virtual Dictionary<XName, object> DeserializePropertyBag(Stream stream)
+        {
+            using (XmlDictionaryReader dictionaryReader = XmlDictionaryReader.CreateBinaryReader(stream, XmlDictionaryReaderQuotas.Max))
+            {
+                Dictionary<XName, object> propertyBag = new Dictionary<XName, object>();
+
+                if (dictionaryReader.ReadToDescendant("Property"))
+                {
+                    do
+                    {
+                        dictionaryReader.Read();
+                        KeyValuePair<XName, object> property = (KeyValuePair<XName, object>) this.serializer.ReadObject(dictionaryReader);
+                        propertyBag.Add(property.Key, property.Value);
+                    }
+                    while (dictionaryReader.ReadToNextSibling("Property"));
+                }
+
+                return propertyBag;
+            }
+        }
+
+        protected virtual object DeserializeValue(Stream stream)
+        {
+            using (XmlDictionaryReader dictionaryReader = XmlDictionaryReader.CreateBinaryReader(stream, XmlDictionaryReaderQuotas.Max))
+            {
+                return this.serializer.ReadObject(dictionaryReader);
+            }
+        }
+
+        protected virtual void SerializePropertyBag(Stream stream, Dictionary<XName, object> propertyBag)
+        {
+            using (XmlDictionaryWriter dictionaryWriter = XmlDictionaryWriter.CreateBinaryWriter(stream, null, null, false))
+            {
+                dictionaryWriter.WriteStartElement("Properties");
+
+                foreach (KeyValuePair<XName, object> property in propertyBag)
+                {
+                    dictionaryWriter.WriteStartElement("Property");
+                    this.serializer.WriteObject(dictionaryWriter, property);
+                    dictionaryWriter.WriteEndElement();
+                }
+
+                dictionaryWriter.WriteEndElement();
+            }
+        }
+
+        protected virtual void SerializeValue(Stream stream, object value)
+        {
+            using (XmlDictionaryWriter dictionaryWriter = XmlDictionaryWriter.CreateBinaryWriter(stream, null, null, false))
+            {
+                this.serializer.WriteObject(dictionaryWriter, value);
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/DeleteWorkflowOwnerAsyncResult.cs

@@ -0,0 +1,65 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System.Data;
+    using System.Data.SqlClient;
+    using System.Globalization;
+    using System.Runtime.DurableInstancing;
+    using System.Transactions;
+
+    sealed class DeleteWorkflowOwnerAsyncResult : WorkflowOwnerAsyncResult
+    {
+        static string commandText = string.Format(CultureInfo.InvariantCulture, "{0}.[DeleteLockOwner]", SqlWorkflowInstanceStoreConstants.DefaultSchema);
+        long surrogateLockOwnerId;
+
+        public DeleteWorkflowOwnerAsyncResult
+            (
+            InstancePersistenceContext context,
+            InstancePersistenceCommand command,
+            SqlWorkflowInstanceStore store,
+            SqlWorkflowInstanceStoreLock storeLock,
+            Transaction currentTransaction,
+            TimeSpan timeout,
+            AsyncCallback callback,
+            object state
+            ) :
+            base(context, command, store, storeLock, currentTransaction, timeout, callback, state)
+        {
+        }
+
+        protected override void GenerateSqlCommand(SqlCommand sqlCommand)
+        {
+            base.GenerateSqlCommand(sqlCommand);
+            this.surrogateLockOwnerId = base.StoreLock.SurrogateLockOwnerId;
+            sqlCommand.Parameters.Add(new SqlParameter { ParameterName = "@surrogateLockOwnerId", SqlDbType = SqlDbType.BigInt, Value = this.surrogateLockOwnerId });
+        }
+
+        protected override string GetSqlCommandText()
+        {
+            return DeleteWorkflowOwnerAsyncResult.commandText;
+        }
+
+        protected override CommandType GetSqlCommandType()
+        {
+            return CommandType.StoredProcedure;
+        }
+
+        protected override Exception ProcessSqlResult(SqlDataReader reader)
+        {
+            Exception exception = null;
+
+            exception = StoreUtilities.CheckRemainingResultSetForErrors(base.InstancePersistenceCommand.Name, reader);
+
+            if (exception == null)
+            {
+                base.InstancePersistenceContext.InstanceHandle.Free();
+                base.StoreLock.MarkInstanceOwnerLost(this.surrogateLockOwnerId, true);
+            }
+
+            return exception;
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/DeletedMetadataValue.cs

@@ -0,0 +1,11 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    [Serializable]
+    struct DeletedMetadataValue
+    {
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/DetectActivatableWorkflowsAsyncResult.cs

@@ -0,0 +1,81 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System.Data;
+    using System.Data.SqlClient;
+    using System.Globalization;
+    using System.Runtime.DurableInstancing;
+    using System.Transactions;
+    using System.Xml.Linq;
+    using System.Runtime;
+
+    class DetectActivatableWorkflowsAsyncResult : SqlWorkflowInstanceStoreAsyncResult
+    {
+        static readonly string commandText = string.Format(CultureInfo.InvariantCulture, "{0}.[GetActivatableWorkflowsActivationParameters]", SqlWorkflowInstanceStoreConstants.DefaultSchema);
+
+        public DetectActivatableWorkflowsAsyncResult
+            (
+            InstancePersistenceContext context,
+            InstancePersistenceCommand command,
+            SqlWorkflowInstanceStore store,
+            SqlWorkflowInstanceStoreLock storeLock,
+            Transaction currentTransaction,
+            TimeSpan timeout,
+            AsyncCallback callback,
+            object state
+            ) :
+            base(context, command, store, storeLock, currentTransaction, timeout, callback, state)
+        {
+        }
+
+        protected override string ConnectionString
+        {
+            get
+            {
+                SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder(base.Store.CachedConnectionString);
+                builder.ApplicationName = SqlWorkflowInstanceStore.CommonConnectionPoolName;
+                return builder.ToString();
+            }
+        }
+
+        protected override void GenerateSqlCommand(SqlCommand sqlCommand)
+        {
+            sqlCommand.Parameters.Add(new SqlParameter { ParameterName = "@machineName", SqlDbType = SqlDbType.NVarChar, Value = SqlWorkflowInstanceStoreConstants.MachineName });
+        }
+
+        protected override string GetSqlCommandText()
+        {
+            return DetectActivatableWorkflowsAsyncResult.commandText;
+        }
+
+        protected override CommandType GetSqlCommandType()
+        {
+            return CommandType.StoredProcedure;
+        }
+
+        protected override Exception ProcessSqlResult(SqlDataReader reader)
+        {
+            Exception exception = StoreUtilities.GetNextResultSet(base.InstancePersistenceCommand.Name, reader);
+            if (exception == null)
+            {
+                bool signalEvent = false;
+                reader.NextResult();
+                signalEvent = reader.Read(); //The result set contains activatable workflows
+
+                if (signalEvent)
+                {
+                    base.Store.UpdateEventStatus(true, HasActivatableWorkflowEvent.Value);
+                }
+                else
+                {
+                    base.Store.UpdateEventStatus(false, HasActivatableWorkflowEvent.Value);
+                    base.StoreLock.InstanceDetectionTask.ResetTimer(false);
+                }
+            }
+            return exception;
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/DetectActivatableWorkflowsCommand.cs

@@ -0,0 +1,16 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System.Runtime.DurableInstancing;
+
+    sealed class DetectActivatableWorkflowsCommand : InstancePersistenceCommand
+    {
+        public DetectActivatableWorkflowsCommand() :
+            base(SqlWorkflowInstanceStoreConstants.DurableInstancingNamespace.GetName("DetectActivatableWorkflows"))
+        {
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/DetectActivatableWorkflowsTask.cs

@@ -0,0 +1,36 @@
+//----------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//----------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System;
+    using System.Runtime.DurableInstancing;
+
+    class DetectActivatableWorkflowsTask : PersistenceTask
+    {
+        public DetectActivatableWorkflowsTask(SqlWorkflowInstanceStore store, SqlWorkflowInstanceStoreLock storeLock, TimeSpan taskInterval)
+            : base(store, storeLock, new DetectActivatableWorkflowsCommand(), taskInterval, SqlWorkflowInstanceStoreConstants.DefaultTaskTimeout, false)
+        {
+        }
+
+        public override void ResetTimer(bool fireImmediately, TimeSpan? taskIntervalOverride)
+        {
+            InstanceOwner instanceOwner;
+            if (base.Store.FindEvent(HasActivatableWorkflowEvent.Value, out instanceOwner) != null)
+            {
+                base.ResetTimer(fireImmediately, taskIntervalOverride);
+            }
+        }
+
+        protected override void HandleError(Exception exception)
+        {
+            if (TD.RunnableInstancesDetectionErrorIsEnabled())
+            {
+                TD.RunnableInstancesDetectionError(exception);
+            }
+
+            this.ResetTimer(false);
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/DetectRunnableInstancesAsyncResult.cs

@@ -0,0 +1,100 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System.Data;
+    using System.Data.SqlClient;
+    using System.Globalization;
+    using System.Runtime.DurableInstancing;
+    using System.Transactions;
+    using System.Xml.Linq;
+    using System.Runtime;
+
+    sealed class DetectRunnableInstancesAsyncResult : SqlWorkflowInstanceStoreAsyncResult
+    {
+        static readonly string commandText = string.Format(CultureInfo.InvariantCulture, "{0}.[DetectRunnableInstances]", SqlWorkflowInstanceStoreConstants.DefaultSchema);
+
+        public DetectRunnableInstancesAsyncResult
+            (
+            InstancePersistenceContext context,
+            InstancePersistenceCommand command,
+            SqlWorkflowInstanceStore store,
+            SqlWorkflowInstanceStoreLock storeLock,
+            Transaction currentTransaction,
+            TimeSpan timeout,
+            AsyncCallback callback,
+            object state
+            ) :
+            base(context, command, store, storeLock, currentTransaction, timeout, callback, state)
+        {
+        }
+
+        protected override string ConnectionString
+        {
+            get
+            {
+                SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder(base.Store.CachedConnectionString);
+                builder.ApplicationName = SqlWorkflowInstanceStore.CommonConnectionPoolName;
+                return builder.ToString();
+            }
+        }
+
+        protected override void GenerateSqlCommand(SqlCommand sqlCommand)
+        {
+            sqlCommand.Parameters.Add(new SqlParameter { ParameterName = "@workflowHostType", SqlDbType = SqlDbType.UniqueIdentifier, Value = base.Store.WorkflowHostType });
+            if (base.Store.DatabaseVersion >= StoreUtilities.Version45)
+            {
+                sqlCommand.Parameters.Add(new SqlParameter { ParameterName = "@surrogateLockOwnerId", SqlDbType = SqlDbType.BigInt, Value = base.StoreLock.SurrogateLockOwnerId });
+            }
+        }
+
+        protected override string GetSqlCommandText()
+        {
+            return DetectRunnableInstancesAsyncResult.commandText;
+        }
+
+        protected override CommandType GetSqlCommandType()
+        {
+            return CommandType.StoredProcedure;
+        }
+
+        protected override Exception ProcessSqlResult(SqlDataReader reader)
+        {
+            Exception exception = StoreUtilities.GetNextResultSet(base.InstancePersistenceCommand.Name, reader);
+            if (exception == null)
+            {
+                bool instancesExist = !reader.IsDBNull(1);
+                TimeSpan? timeTillNextPoll = null;
+                bool instancesReadyToRun = false;
+
+                if (instancesExist)
+                {
+                    DateTime expirationTime = reader.GetDateTime(1);
+                    DateTime utcNow = reader.GetDateTime(2);
+
+                    if (expirationTime <= utcNow)
+                    {
+                        instancesReadyToRun = true;
+                    }
+                    else
+                    {
+                        timeTillNextPoll = expirationTime.Subtract(utcNow);
+                    }
+                }
+
+                if (instancesReadyToRun)
+                {
+                    base.Store.UpdateEventStatus(true, HasRunnableWorkflowEvent.Value);
+                }
+                else
+                {
+                    base.Store.UpdateEventStatus(false, HasRunnableWorkflowEvent.Value);
+                    base.StoreLock.InstanceDetectionTask.ResetTimer(false, timeTillNextPoll);
+                }
+            }
+            return exception;
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/DetectRunnableInstancesCommand.cs

@@ -0,0 +1,16 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System.Runtime.DurableInstancing;
+
+    sealed class DetectRunnableInstancesCommand : InstancePersistenceCommand
+    {
+        public DetectRunnableInstancesCommand() :
+            base(SqlWorkflowInstanceStoreConstants.DurableInstancingNamespace.GetName("DetectRunnableInstances"))
+        {
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/DetectRunnableInstancesTask.cs

@@ -0,0 +1,36 @@
+//----------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//----------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System;
+    using System.Runtime.DurableInstancing;
+
+    class DetectRunnableInstancesTask : PersistenceTask
+    {
+        public DetectRunnableInstancesTask(SqlWorkflowInstanceStore store, SqlWorkflowInstanceStoreLock storeLock, TimeSpan taskInterval)
+            : base(store, storeLock, new DetectRunnableInstancesCommand(), taskInterval, SqlWorkflowInstanceStoreConstants.DefaultTaskTimeout, false)
+        {
+        }
+
+        public override void ResetTimer(bool fireImmediately, TimeSpan? taskIntervalOverride)
+        {
+            InstanceOwner instanceOwner;
+            if (base.Store.FindEvent(HasRunnableWorkflowEvent.Value, out instanceOwner) != null)
+            {
+                base.ResetTimer(fireImmediately, taskIntervalOverride);
+            }
+        }
+
+        protected override void HandleError(Exception exception)
+        {
+            if (TD.RunnableInstancesDetectionErrorIsEnabled())
+            {
+                TD.RunnableInstancesDetectionError(exception);
+            }
+
+            this.ResetTimer(false);
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/ExtendLockAsyncResult.cs

@@ -0,0 +1,67 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System.Data;
+    using System.Data.SqlClient;
+    using System.Globalization;
+    using System.Runtime.DurableInstancing;
+    using System.Transactions;
+    using System.Xml.Linq;
+
+    sealed class ExtendLockAsyncResult : SqlWorkflowInstanceStoreAsyncResult
+    {
+        static readonly string commandText = string.Format(CultureInfo.InvariantCulture, "{0}.[ExtendLock]", SqlWorkflowInstanceStoreConstants.DefaultSchema);
+
+        public ExtendLockAsyncResult
+            (
+            InstancePersistenceContext context,
+            InstancePersistenceCommand command,
+            SqlWorkflowInstanceStore store,
+            SqlWorkflowInstanceStoreLock storeLock,
+            Transaction currentTransaction,
+            TimeSpan timeout, 
+            AsyncCallback callback, 
+            object state
+            ) :
+            base(context, command, store, storeLock, currentTransaction, timeout, int.MaxValue, callback, state)
+        {
+        }
+
+        protected override string ConnectionString
+        {
+            get
+            {
+                SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder(base.Store.CachedConnectionString);
+                builder.ApplicationName = SqlWorkflowInstanceStore.CommonConnectionPoolName;
+                return builder.ToString();
+            }
+        }
+
+        protected override void GenerateSqlCommand(SqlCommand sqlCommand)
+        {
+            long surrogateOwnerId = base.StoreLock.SurrogateLockOwnerId;
+            double lockTimeout = base.Store.BufferedHostLockRenewalPeriod.TotalSeconds;
+
+            sqlCommand.Parameters.Add(new SqlParameter { ParameterName = "@surrogateLockOwnerId", SqlDbType = SqlDbType.BigInt, Value = surrogateOwnerId });
+            sqlCommand.Parameters.Add(new SqlParameter { ParameterName = "@lockTimeout", SqlDbType = SqlDbType.Int, Value = lockTimeout });
+        }
+
+        protected override string GetSqlCommandText()
+        {
+            return ExtendLockAsyncResult.commandText;
+        }
+
+        protected override CommandType GetSqlCommandType()
+        {
+            return CommandType.StoredProcedure;
+        }
+
+        protected override Exception ProcessSqlResult(SqlDataReader reader)
+        {
+            return StoreUtilities.CheckRemainingResultSetForErrors(base.InstancePersistenceCommand.Name, reader);
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/ExtendLockCommand.cs

@@ -0,0 +1,16 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System.Runtime.DurableInstancing;
+
+    sealed class ExtendLockCommand : InstancePersistenceCommand
+    {
+        public ExtendLockCommand() :
+            base(SqlWorkflowInstanceStoreConstants.DurableInstancingNamespace.GetName("ExtendLock"))
+        {
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/GZipObjectSerializer.cs

@@ -0,0 +1,45 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System.Collections.Generic;
+    using System.IO;
+    using System.IO.Compression;
+    using System.Xml.Linq;
+
+    sealed class GZipObjectSerializer : DefaultObjectSerializer
+    {
+        protected override Dictionary<XName, object> DeserializePropertyBag(Stream stream)
+        {
+            using (GZipStream gzip = new GZipStream(stream, CompressionMode.Decompress, true))
+            {
+                return base.DeserializePropertyBag(gzip);
+            }
+        }
+        protected override object DeserializeValue(Stream stream)
+        {
+            using (GZipStream gzip = new GZipStream(stream, CompressionMode.Decompress, true))
+            {
+                return base.DeserializeValue(gzip);
+            }
+        }
+
+        protected override void SerializePropertyBag(Stream stream, Dictionary<XName, object> propertyBag)
+        {
+            using (GZipStream gzip = new GZipStream(stream, CompressionLevel.Fastest, true))
+            {
+                base.SerializePropertyBag(gzip, propertyBag);
+            }
+        }
+
+        protected override void SerializeValue(Stream stream, object value)
+        {
+            using (GZipStream gzip = new GZipStream(stream, CompressionLevel.Fastest, true))
+            {
+                base.SerializeValue(gzip, value);
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/ILoadRetryStrategy.cs

@@ -0,0 +1,13 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System;
+
+    interface ILoadRetryStrategy
+    {
+        TimeSpan RetryDelay(int retryAttempt);
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/IObjectSerializer.cs

@@ -0,0 +1,17 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System.Collections.Generic;
+    using System.Xml.Linq;
+
+    interface IObjectSerializer
+    {
+        object DeserializeValue(byte[] bytes);
+        Dictionary<XName, object> DeserializePropertyBag(byte[] bytes);
+        ArraySegment<byte> SerializeValue(object value);
+        ArraySegment<byte> SerializePropertyBag(Dictionary<XName, object> value);
+    }
+}

mcs/class/referencesource/System.Activities.DurableInstancing/System/Activities/DurableInstancing/InstanceAlreadyLockedToOwnerException.cs

@@ -0,0 +1,27 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities.DurableInstancing
+{
+    using System.Runtime.DurableInstancing;
+    using System.Runtime.Serialization;
+    using System.Security;
+    using System.Xml.Linq;
+
+    [Serializable]
+    class InstanceAlreadyLockedToOwnerException : InstancePersistenceCommandException
+    {
+        public InstanceAlreadyLockedToOwnerException(XName commandName, Guid instanceId, long instanceVersion)
+            : base(commandName, instanceId)
+        {
+            this.InstanceVersion = instanceVersion;
+        }
+
+        public long InstanceVersion
+        {
+            get;
+            private set;
+        }
+    }
+}