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//----------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------
namespace System.ServiceModel.Activities
{
using System.Activities;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Runtime;
using System.ServiceModel.Channels;
using System.ServiceModel.Dispatcher;
using SR2 = System.ServiceModel.Activities.SR;
using System.Runtime.DurableInstancing;
using System.Xml.Linq;
class ToReply : NativeActivity
{
IDispatchMessageFormatter formatter;
IDispatchFaultFormatter faultFormatter;
Collection<InArgument> parameters;
public IDispatchMessageFormatter Formatter
{
get
{
return this.formatter;
}
set
{
this.formatter = value;
ValidateFormatters();
}
}
public IDispatchFaultFormatter FaultFormatter
{
get
{
return this.faultFormatter;
}
set
{
this.faultFormatter = value;
ValidateFormatters();
}
}
public bool IncludeExceptionDetailInFaults
{
get;
set;
}
public InArgument Result
{
get;
set;
}
public Collection<InArgument> Parameters
{
get
{
if (this.parameters == null)
{
this.parameters = new Collection<InArgument>();
}
return this.parameters;
}
}
//CorrelationHandle is required to get the message version from the InternalReceivedMessage
public InArgument<CorrelationHandle> CorrelatesWith
{
get;
set;
}
public OutArgument<Message> Message
{
get;
set;
}
protected override void CacheMetadata(NativeActivityMetadata metadata)
{
if (this.Result != null)
{
RuntimeArgument resultArgument = new RuntimeArgument(Constants.Result, this.Result.ArgumentType, ArgumentDirection.In);
metadata.Bind(this.Result, resultArgument);
metadata.AddArgument(resultArgument);
}
if (this.parameters != null)
{
int count = 0;
foreach (InArgument parameter in this.parameters)
{
RuntimeArgument parameterArgument = new RuntimeArgument(Constants.Parameter + count++, parameter.ArgumentType, ArgumentDirection.In);
metadata.Bind(parameter, parameterArgument);
metadata.AddArgument(parameterArgument);
}
}
RuntimeArgument messageArgument = new RuntimeArgument(Constants.Message, Constants.MessageType, ArgumentDirection.Out, true);
if (this.Message == null)
{
this.Message = new OutArgument<Message>();
}
metadata.Bind(this.Message, messageArgument);
metadata.AddArgument(messageArgument);
RuntimeArgument correlatesWithArgument = new RuntimeArgument(Constants.CorrelatesWith, Constants.CorrelationHandleType, ArgumentDirection.In);
if (this.CorrelatesWith == null)
{
this.CorrelatesWith = new InArgument<CorrelationHandle>();
}
metadata.Bind(this.CorrelatesWith, correlatesWithArgument);
metadata.AddArgument(correlatesWithArgument);
}
protected override void Execute(NativeActivityContext context)
{
MessageVersion version;
SendReceiveExtension sendReceiveExtension = context.GetExtension<SendReceiveExtension>();
if (sendReceiveExtension != null)
{
HostSettings hostSettings = sendReceiveExtension.HostSettings;
this.IncludeExceptionDetailInFaults = hostSettings.IncludeExceptionDetailInFaults;
}
CorrelationHandle correlatesWith = (this.CorrelatesWith == null) ? null : this.CorrelatesWith.Get(context);
if (correlatesWith == null)
{
correlatesWith = context.Properties.Find(CorrelationHandle.StaticExecutionPropertyName) as CorrelationHandle;
}
CorrelationResponseContext responseContext;
if (correlatesWith != null)
{
if (sendReceiveExtension != null)
{
if (!this.TryGetMessageVersion(correlatesWith.InstanceKey, out version))
{
throw FxTrace.Exception.AsError(new InvalidOperationException(SR2.MessageVersionInformationNotFound));
}
}
else if (correlatesWith.TryAcquireResponseContext(context, out responseContext))
{
//Register the ResponseContext so that InternalSendMessage can access it.
if (!correlatesWith.TryRegisterResponseContext(context, responseContext))
{
throw FxTrace.Exception.AsError(new InvalidOperationException(SR2.ResponseContextIsNotNull));
}
//Use the same MessageVersion as the incoming message that is retrieved using CorrelatonHandle
version = responseContext.MessageVersion;
}
else
{
throw FxTrace.Exception.AsError(new InvalidOperationException(SR2.CorrelationResponseContextShouldNotBeNull));
}
}
else
{
throw FxTrace.Exception.AsError(new InvalidOperationException(SR2.CorrelationResponseContextShouldNotBeNull));
}
Fx.Assert((this.Formatter == null && this.FaultFormatter != null) ||
(this.Formatter != null && this.FaultFormatter == null),
"OperationFormatter and FaultFormatter cannot be both null or both set!");
if (this.FaultFormatter != null)
{
Fx.Assert(this.parameters.Count == 1, "Exception should be the only parameter!");
Exception exception = this.parameters[0].Get(context) as Exception;
Fx.Assert(exception != null, "InArgument must be an Exception!");
MessageFault messageFault;
string action;
FaultException faultException = exception as FaultException;
if (faultException != null)
{
// This is an expected fault
// Reproduce logic from ErrorBehavior.InitializeFault
messageFault = this.FaultFormatter.Serialize(faultException, out action);
if (action == null)
{
action = version.Addressing.DefaultFaultAction;
}
}
else
{
// This is an unexpected fault
// Reproduce logic from ErrorBehavior.ProvideFaultOfLastResort
FaultCode code = new FaultCode(FaultCodeConstants.Codes.InternalServiceFault, FaultCodeConstants.Namespaces.NetDispatch);
code = FaultCode.CreateReceiverFaultCode(code);
action = FaultCodeConstants.Actions.NetDispatcher;
if (this.IncludeExceptionDetailInFaults)
{
messageFault = MessageFault.CreateFault(code,
new FaultReason(new FaultReasonText(exception.Message, CultureInfo.CurrentCulture)),
new ExceptionDetail(exception));
}
else
{
messageFault = MessageFault.CreateFault(code,
new FaultReason(new FaultReasonText(SR2.InternalServerError, CultureInfo.CurrentCulture)));
}
}
if (messageFault == null)
{
throw FxTrace.Exception.AsError(new InvalidOperationException(SR2.CannotCreateMessageFault));
}
else
{
Message outMessage = System.ServiceModel.Channels.Message.CreateMessage(version, messageFault, action);
this.Message.Set(context, outMessage);
}
}
else
{
object[] inObjects;
if (this.parameters != null)
{
inObjects = new object[this.parameters.Count];
for (int i = 0; i < this.parameters.Count; i++)
{
Fx.Assert(this.Parameters[i] != null, "Parameter cannot be null");
inObjects[i] = this.parameters[i].Get(context);
}
}
else
{
inObjects = Constants.EmptyArray;
}
object returnValue = null;
if (this.Result != null)
{
returnValue = this.Result.Get(context);
}
Message outMessage = this.Formatter.SerializeReply(version, inObjects, returnValue);
this.Message.Set(context, outMessage);
}
}
bool TryGetMessageVersion(InstanceKey instanceKey, out MessageVersion version)
{
Fx.Assert(instanceKey != null, "Expect a valid instanceKey here");
version = MessageVersion.None;
if (instanceKey != null)
{
InstanceValue messageVersionValue;
if (instanceKey.Metadata.TryGetValue(WorkflowServiceNamespace.MessageVersionForReplies, out messageVersionValue))
{
version = (MessageVersion)messageVersionValue.Value;
return true;
}
}
return false;
}
void ValidateFormatters()
{
if (this.Formatter == null && this.FaultFormatter == null)
{
throw FxTrace.Exception.AsError(new ValidationException(SR2.OperationFormatterAndFaultFormatterNotSet));
}
if (this.Formatter != null && this.FaultFormatter != null)
{
throw FxTrace.Exception.AsError(new ValidationException(SR2.OperationFormatterAndFaultFormatterIncorrectlySet));
}
}
}
}
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