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//----------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------
namespace System.ServiceModel.Activities.Description
{
using System.Collections;
using System.Collections.Generic;
using System.Activities;
using System.Runtime;
using System.Runtime.Diagnostics;
using System.Runtime.DurableInstancing;
using System.ServiceModel.Activities.Dispatcher;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;
using System.ServiceModel.Diagnostics;
using System.ServiceModel.Dispatcher;
using System.Transactions;
class WorkflowOperationBehavior : IOperationBehavior
{
Bookmark bookmark;
public WorkflowOperationBehavior(Bookmark bookmark, bool canCreateInstance)
: this(canCreateInstance)
{
Fx.Assert(bookmark != null, "bookmark must not be null!");
this.bookmark = bookmark;
}
protected WorkflowOperationBehavior(bool canCreateInstance)
{
this.CanCreateInstance = canCreateInstance;
}
internal bool CanCreateInstance
{
get;
set;
}
public void AddBindingParameters(OperationDescription operationDescription, BindingParameterCollection bindingParameters)
{
}
public void ApplyClientBehavior(OperationDescription operationDescription, ClientOperation clientOperation)
{
}
public void ApplyDispatchBehavior(OperationDescription operationDescription, DispatchOperation dispatchOperation)
{
if (operationDescription == null)
{
throw FxTrace.Exception.ArgumentNull("operationDescription");
}
if (dispatchOperation == null)
{
throw FxTrace.Exception.ArgumentNull("dispatchOperation");
}
if (dispatchOperation.Parent == null
|| dispatchOperation.Parent.ChannelDispatcher == null
|| dispatchOperation.Parent.ChannelDispatcher.Host == null
|| dispatchOperation.Parent.ChannelDispatcher.Host.Description == null
|| dispatchOperation.Parent.ChannelDispatcher.Host.Description.Behaviors == null)
{
throw FxTrace.Exception.AsError(new InvalidOperationException(SR.DispatchOperationInInvalidState));
}
ServiceHostBase serviceHost = dispatchOperation.Parent.ChannelDispatcher.Host;
if (!(serviceHost is WorkflowServiceHost))
{
throw FxTrace.Exception.AsError(
new InvalidOperationException(SR.WorkflowBehaviorWithNonWorkflowHost(typeof(WorkflowOperationBehavior).Name)));
}
CorrelationKeyCalculator correlationKeyCalculator = null;
ServiceEndpoint endpoint = null;
foreach (ServiceEndpoint endpointToMatch in serviceHost.Description.Endpoints)
{
if (endpointToMatch.Id == dispatchOperation.Parent.EndpointDispatcher.Id)
{
endpoint = endpointToMatch;
break;
}
}
if (endpoint != null)
{
CorrelationQueryBehavior queryBehavior = endpoint.Behaviors.Find<CorrelationQueryBehavior>();
if (queryBehavior != null)
{
correlationKeyCalculator = queryBehavior.GetKeyCalculator();
}
}
dispatchOperation.Invoker = new WorkflowOperationInvoker(operationDescription,
endpoint, correlationKeyCalculator, this, serviceHost, dispatchOperation.Invoker);
}
public void Validate(OperationDescription operationDescription)
{
}
protected internal virtual Bookmark OnResolveBookmark(WorkflowOperationContext context, out BookmarkScope bookmarkScope, out object value)
{
Fx.Assert(this.bookmark != null, "bookmark must not be null!");
CorrelationMessageProperty correlationMessageProperty;
if (CorrelationMessageProperty.TryGet(context.OperationContext.IncomingMessageProperties, out correlationMessageProperty))
{
bookmarkScope = new BookmarkScope(correlationMessageProperty.CorrelationKey.Value);
}
else
{
bookmarkScope = BookmarkScope.Default;
}
value = context;
return this.bookmark;
}
//Invoker for workflowbased application endpoint operation
class WorkflowOperationInvoker : ControlOperationInvoker, IInstanceTransaction
{
bool performanceCountersEnabled;
bool propagateActivity;
bool isHostingEndpoint;
IOperationInvoker innerInvoker;
WorkflowOperationBehavior behavior;
bool isFirstReceiveOfTransactedReceiveScopeTree;
public WorkflowOperationInvoker(OperationDescription operationDescription, ServiceEndpoint endpoint,
CorrelationKeyCalculator keyCalculator, WorkflowOperationBehavior behavior, ServiceHostBase host, IOperationInvoker innerInvoker)
: base(operationDescription, endpoint, keyCalculator, host)
{
Fx.Assert(operationDescription != null, "Null OperationDescription");
Fx.Assert(behavior != null, "Null WorkflowOperationBehavior");
this.StaticBookmarkName = behavior.bookmark == null ? null : behavior.bookmark.Name;
this.behavior = behavior;
this.CanCreateInstance = behavior.CanCreateInstance;
this.performanceCountersEnabled = PerformanceCounters.PerformanceCountersEnabled;
this.propagateActivity = TraceUtility.ShouldPropagateActivity;
this.isHostingEndpoint = endpoint is WorkflowHostingEndpoint;
this.innerInvoker = innerInvoker;
this.isFirstReceiveOfTransactedReceiveScopeTree = operationDescription.IsFirstReceiveOfTransactedReceiveScopeTree;
}
public override object[] AllocateInputs()
{
if (this.isHostingEndpoint)
{
return this.innerInvoker.AllocateInputs();
}
// InternalReceiveMessage & InternalSendMessage is always MessageIn - MessageOut.
// Therefore we always need an array of size 1.
// DispatchOperationRuntime saves the request into this array in this case ( i.e., when DeserializeRequest is false)
return new object[1];
}
protected override IAsyncResult OnBeginServiceOperation(WorkflowServiceInstance workflowInstance, OperationContext operationContext,
object[] inputs, Transaction currentTransaction, IInvokeReceivedNotification notification, TimeSpan timeout, AsyncCallback callback, object state)
{
Fx.Assert(workflowInstance != null, "caller must verify");
Fx.Assert(inputs != null, "caller must verify");
return WorkflowOperationContext.BeginProcessRequest(workflowInstance, operationContext, this.OperationName, inputs,
this.performanceCountersEnabled, this.propagateActivity, currentTransaction, notification, this.behavior, this.endpoint, timeout, callback, state);
}
protected override object OnEndServiceOperation(WorkflowServiceInstance durableInstance, out object[] outputs, IAsyncResult result)
{
// InternalSendMessage always redirects the replyMessage into the returnValue
object returnValue = WorkflowOperationContext.EndProcessRequest(result, out outputs);
//we will just assert that outputs is always an empty array
Fx.Assert(this.isHostingEndpoint || outputs == null || outputs.Length == 0, "Workflow returned a non-empty out-arg");
return returnValue;
}
public Transaction GetTransactionForInstance(OperationContext operationContext)
{
Transaction tx = null;
// We are only going to go ask the PPD for the transaction if we are NOT the first
// Receive in a TransactedReceiveScope;
if (!this.isFirstReceiveOfTransactedReceiveScopeTree)
{
// We need to get the InstanceKey.
InstanceKey instanceKey;
ICollection<InstanceKey> additionalKeys;
this.GetInstanceKeys(operationContext, out instanceKey, out additionalKeys);
Fx.Assert((instanceKey != null) && (instanceKey.IsValid), "InstanceKey is null or invalid in GetInstanceTransaction");
tx = this.InstanceManager.PersistenceProviderDirectory.GetTransactionForInstance(instanceKey);
}
return tx;
}
}
}
}
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