Requiring transaction flow
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The Client/Service mode requires the use of a transaction-aware binding with transaction flow enabled, and yet this is not enforced by WCF at the service load time
[AttributeUsage(AttributeTargets.Class)]
public class BindingRequirementAttribute : Attribute,IServiceBehavior
{
public bool TransactionFlowEnabled //Default is false
{get;set;}
//More members
}
The BindingRequirementAttribute:
[AttributeUsage(AttributeTargets.Class)]
public class BindingRequirementAttribute : Attribute,IServiceBehavior
{
public bool TFEnabled
{get;set;}
void IServiceBehavior.Validate(ServiceDescription description,
ServiceHostBase host)
{
if(TFEnabled == false)
{
return;
}
foreach(ServiceEndpoint endpoint in description.Endpoints)
{
Exception exception = new InvalidOperationException(...);
foreach(OperationDescription operation in endpoint.Contract.Operations)
{
foreach(IOperationBehavior behavior in operation.Behaviors)
{
if(behavior is TransactionFlowAttribute)
{
TransactionFlowAttribute TFattribute =
behavior as TransactionFlowTFattribute;
if(TFattribute.Transactions == TransactionFlowOption.Allowed)
{
if(endpoint.Binding is NetTcpBinding)
{
NetTcpBinding tcpBinding =
endpoint.Binding as NetTcpBinding;
if(tcpBinding.TransactionFlow == false)
{
throw exception;
}
break;
}
... //Similar checks for the rest of the transaction-aware
//bindings
throw new InvalidOperationException(...);
}
}
}
}
}
}
void IServiceBehavior.AddBindingParameters(...)
{}
void IServiceBehavior.ApplyDispatchBehavior(...)
{}
}
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