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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Dispatcher
{
using System;
using System.Diagnostics.CodeAnalysis;
using System.Runtime;
using System.ServiceModel.Description;
using System.ServiceModel.Diagnostics;
class ServiceOperationInvoker : IOperationInvoker
{
bool canCreateInstance;
bool completesInstance;
bool contractCausesSave;
IOperationInvoker innerInvoker;
public ServiceOperationInvoker(IOperationInvoker innerInvoker, bool completesInstance, bool canCreateInstance, bool contractCausesSave)
{
if (innerInvoker == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("innerInvoker");
}
this.innerInvoker = innerInvoker;
this.completesInstance = completesInstance;
this.canCreateInstance = canCreateInstance;
this.contractCausesSave = contractCausesSave;
}
public bool IsSynchronous
{
get { return this.innerInvoker.IsSynchronous; }
}
public object[] AllocateInputs()
{
return this.innerInvoker.AllocateInputs();
}
public object Invoke(object instance, object[] inputs, out object[] outputs)
{
if (instance == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("instance");
}
ServiceDurableInstance durableInstance = instance as ServiceDurableInstance;
if (durableInstance == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new InvalidOperationException(
SR2.GetString(SR2.InvokeCalledWithWrongType, typeof(DurableServiceAttribute).Name)));
}
object serviceInstance = durableInstance.StartOperation(this.canCreateInstance);
Exception operationException = null;
bool failFast = false;
try
{
return this.innerInvoker.Invoke(serviceInstance, inputs, out outputs);
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
failFast = true;
throw;
}
operationException = e;
ServiceErrorHandler.MarkException(e);
throw;
}
finally
{
if (!failFast)
{
durableInstance.FinishOperation(this.completesInstance, this.contractCausesSave, operationException);
}
}
}
public IAsyncResult InvokeBegin(object instance, object[] inputs, AsyncCallback callback, object state)
{
if (instance == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("instance");
}
ServiceDurableInstance durableInstance = instance as ServiceDurableInstance;
if (durableInstance == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new InvalidOperationException(
SR2.GetString(SR2.InvokeCalledWithWrongType, typeof(DurableServiceAttribute).Name)));
}
return new InvokeAsyncResult(durableInstance, inputs, this, this.canCreateInstance, callback, state);
}
public object InvokeEnd(object instance, out object[] outputs, IAsyncResult result)
{
return InvokeAsyncResult.End(out outputs, result);
}
public class InvokeAsyncResult : AsyncResult
{
static AsyncCallback finishCallback = Fx.ThunkCallback(new AsyncCallback(FinishComplete));
static AsyncCallback invokeCallback = Fx.ThunkCallback(new AsyncCallback(InvokeComplete));
static AsyncCallback startCallback = Fx.ThunkCallback(new AsyncCallback(StartComplete));
Exception completionException;
ServiceDurableInstance durableInstance;
object[] inputs;
ServiceOperationInvoker invoker;
OperationContext operationContext;
object[] outputs;
object returnValue;
object serviceInstance;
public InvokeAsyncResult(ServiceDurableInstance instance, object[] inputs, ServiceOperationInvoker invoker, bool canCreateInstance, AsyncCallback callback, object state)
: base(callback, state)
{
this.invoker = invoker;
this.inputs = inputs;
this.durableInstance = instance;
this.operationContext = OperationContext.Current;
IAsyncResult result = this.durableInstance.BeginStartOperation(canCreateInstance, startCallback, this);
if (result.CompletedSynchronously)
{
this.serviceInstance = this.durableInstance.EndStartOperation(result);
if (DoInvoke())
{
Complete(true, this.completionException);
}
}
}
public static object End(out object[] outputs, IAsyncResult result)
{
InvokeAsyncResult invokeResult = AsyncResult.End<InvokeAsyncResult>(result);
outputs = invokeResult.outputs;
return invokeResult.returnValue;
}
// We pass the exception to another thread
[SuppressMessage("Reliability", "Reliability104")]
[SuppressMessage("Microsoft.Design", "CA1031")]
static void FinishComplete(IAsyncResult result)
{
if (result.CompletedSynchronously)
{
return;
}
InvokeAsyncResult invokeResult = result.AsyncState as InvokeAsyncResult;
Fx.Assert(invokeResult != null, "Async state should have been of type InvokeAsyncResult.");
try
{
invokeResult.durableInstance.EndFinishOperation(result);
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
invokeResult.completionException = e;
}
invokeResult.Complete(false, invokeResult.completionException);
}
// We pass the exception to another thread
[SuppressMessage("Reliability", "Reliability104")]
[SuppressMessage("Microsoft.Design", "CA1031")]
static void InvokeComplete(IAsyncResult resultParameter)
{
if (resultParameter.CompletedSynchronously)
{
return;
}
InvokeAsyncResult invokeResult = resultParameter.AsyncState as InvokeAsyncResult;
Fx.Assert(invokeResult != null,
"Async state should have been of type InvokeAsyncResult.");
try
{
invokeResult.returnValue = invokeResult.invoker.innerInvoker.InvokeEnd(invokeResult.serviceInstance, out invokeResult.outputs, resultParameter);
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
ServiceErrorHandler.MarkException(e);
invokeResult.completionException = e;
}
finally
{
if (invokeResult.DoFinish())
{
invokeResult.Complete(false, invokeResult.completionException);
}
}
}
// We pass the exception to another thread
[SuppressMessage("Reliability", "Reliability104")]
[SuppressMessage("Microsoft.Design", "CA1031")]
static void StartComplete(IAsyncResult resultParameter)
{
if (resultParameter.CompletedSynchronously)
{
return;
}
InvokeAsyncResult invokeResult = resultParameter.AsyncState as InvokeAsyncResult;
Fx.Assert(invokeResult != null,
"Async state should have been of type InvokeAsyncResult.");
try
{
invokeResult.serviceInstance = invokeResult.durableInstance.EndStartOperation(resultParameter);
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
invokeResult.Complete(false, e);
return;
}
if (invokeResult.DoInvoke())
{
invokeResult.Complete(false, invokeResult.completionException);
}
}
// We pass the exception to another thread
[SuppressMessage("Reliability", "Reliability104")]
[SuppressMessage("Microsoft.Design", "CA1031")]
bool DoFinish()
{
try
{
IAsyncResult result = this.durableInstance.BeginFinishOperation(this.invoker.completesInstance, this.invoker.contractCausesSave, this.completionException, finishCallback, this);
if (result.CompletedSynchronously)
{
this.durableInstance.EndFinishOperation(result);
return true;
}
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
this.completionException = e;
return true;
}
return false;
}
// We pass the exception to another thread
[SuppressMessage("Reliability", "Reliability104")]
[SuppressMessage("Microsoft.Design", "CA1031")]
bool DoInvoke()
{
bool finishNow = false;
try
{
IAsyncResult result = null;
using (OperationContextScope operationScope = new OperationContextScope(this.operationContext))
{
result = this.invoker.innerInvoker.InvokeBegin(this.serviceInstance, this.inputs, invokeCallback, this);
}
if (result.CompletedSynchronously)
{
this.returnValue = this.invoker.innerInvoker.InvokeEnd(this.serviceInstance, out this.outputs, result);
finishNow = true;
}
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
ServiceErrorHandler.MarkException(e);
this.completionException = e;
finishNow = true;
}
if (finishNow)
{
if (DoFinish())
{
return true;
}
}
return false;
}
}
}
}
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