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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Dispatcher
{
using System.Collections.ObjectModel;
using System.ServiceModel.Channels;
using System.ServiceModel;
using System.ServiceModel.Description;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.ServiceModel.Transactions;
class TransactionValidationBehavior : IEndpointBehavior, IServiceBehavior
{
static TransactionValidationBehavior instance;
internal static TransactionValidationBehavior Instance
{
get
{
if (instance == null)
instance = new TransactionValidationBehavior();
return instance;
}
}
TransactionValidationBehavior() { }
void ValidateTransactionFlowRequired(string resource, string name, ServiceEndpoint endpoint)
{
bool anOperationRequiresTxFlow = false;
for (int i = 0; i < endpoint.Contract.Operations.Count; i++)
{
OperationDescription operationDescription = endpoint.Contract.Operations[i];
TransactionFlowAttribute transactionFlow = operationDescription.Behaviors.Find<TransactionFlowAttribute>();
if (transactionFlow != null && transactionFlow.Transactions == TransactionFlowOption.Mandatory)
{
anOperationRequiresTxFlow = true;
break;
}
}
if (anOperationRequiresTxFlow)
{
CustomBinding binding = new CustomBinding(endpoint.Binding);
TransactionFlowBindingElement transactionFlowBindingElement =
binding.Elements.Find<TransactionFlowBindingElement>();
if (transactionFlowBindingElement == null || !transactionFlowBindingElement.Transactions)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
String.Format(Globalization.CultureInfo.CurrentCulture, SR.GetString(resource), name, binding.Name)));
}
}
}
void IEndpointBehavior.Validate(ServiceEndpoint serviceEndpoint)
{
if (serviceEndpoint == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("serviceEndpoint");
ValidateTransactionFlowRequired(SR.ChannelHasAtLeastOneOperationWithTransactionFlowEnabled,
serviceEndpoint.Contract.Name,
serviceEndpoint);
EnsureNoOneWayTransactions(serviceEndpoint);
ValidateNoMSMQandTransactionFlow(serviceEndpoint);
ValidateCallbackBehaviorAttributeWithNoScopeRequired(serviceEndpoint);
OperationDescription autoCompleteFalseOperation = GetAutoCompleteFalseOperation(serviceEndpoint);
if (autoCompleteFalseOperation != null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
SR.GetString(SR.SFxTransactionAutoCompleteFalseOnCallbackContract, autoCompleteFalseOperation.Name, serviceEndpoint.Contract.Name)));
}
}
void ValidateCallbackBehaviorAttributeWithNoScopeRequired(ServiceEndpoint endpoint)
{
// If the endpoint has no operations with TransactionScopeRequired=true, disallow any
// transaction-related properties on the CallbackBehaviorAttribute
if (!HasTransactedOperations(endpoint))
{
CallbackBehaviorAttribute attribute = endpoint.Behaviors.Find<CallbackBehaviorAttribute>();
if (attribute != null)
{
if (attribute.TransactionTimeoutSet)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
SR.GetString(SR.SFxTransactionTransactionTimeoutNeedsScope, endpoint.Contract.Name)));
}
if (attribute.IsolationLevelSet)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
SR.GetString(SR.SFxTransactionIsolationLevelNeedsScope, endpoint.Contract.Name)));
}
}
}
}
void IEndpointBehavior.AddBindingParameters(ServiceEndpoint serviceEndpoint, BindingParameterCollection bindingParameters)
{
}
void IEndpointBehavior.ApplyDispatchBehavior(ServiceEndpoint serviceEndpoint, EndpointDispatcher endpointDispatcher)
{
}
void IEndpointBehavior.ApplyClientBehavior(ServiceEndpoint serviceEndpoint, ClientRuntime behavior)
{
}
void IServiceBehavior.AddBindingParameters(ServiceDescription description, ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints, BindingParameterCollection parameters)
{
}
void IServiceBehavior.ApplyDispatchBehavior(ServiceDescription service, ServiceHostBase serviceHostBase)
{
}
void IServiceBehavior.Validate(ServiceDescription service, ServiceHostBase serviceHostBase)
{
if (service == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("service");
ValidateNotConcurrentWhenReleaseServiceInstanceOnTxComplete(service);
bool singleThreaded = IsSingleThreaded(service);
for (int i = 0; i < service.Endpoints.Count; i++)
{
ServiceEndpoint endpoint = service.Endpoints[i];
ValidateTransactionFlowRequired(SR.ServiceHasAtLeastOneOperationWithTransactionFlowEnabled,
service.Name,
endpoint);
EnsureNoOneWayTransactions(endpoint);
ValidateNoMSMQandTransactionFlow(endpoint);
ContractDescription contract = endpoint.Contract;
for (int j = 0; j < contract.Operations.Count; j++)
{
OperationDescription operation = contract.Operations[j];
ValidateScopeRequiredAndAutoComplete(operation, singleThreaded, contract.Name);
}
ValidateAutoCompleteFalseRequirements(service, endpoint);
}
ValidateServiceBehaviorAttributeWithNoScopeRequired(service);
ValidateTransactionAutoCompleteOnSessionCloseHasSession(service);
}
void ValidateAutoCompleteFalseRequirements(ServiceDescription service, ServiceEndpoint endpoint)
{
OperationDescription autoCompleteFalseOperation = GetAutoCompleteFalseOperation(endpoint);
if (autoCompleteFalseOperation != null)
{
// Does the service have InstanceContextMode.PerSession or Shareable?
ServiceBehaviorAttribute serviceBehavior = service.Behaviors.Find<ServiceBehaviorAttribute>();
if (serviceBehavior != null)
{
InstanceContextMode instanceMode = serviceBehavior.InstanceContextMode;
if (instanceMode != InstanceContextMode.PerSession)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
SR.GetString(SR.SFxTransactionAutoCompleteFalseAndInstanceContextMode,
endpoint.Contract.Name, autoCompleteFalseOperation.Name)));
}
}
// Does the binding support sessions?
if (!autoCompleteFalseOperation.IsInsideTransactedReceiveScope)
{
if (!RequiresSessions(endpoint))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
SR.GetString(SR.SFxTransactionAutoCompleteFalseAndSupportsSession,
endpoint.Contract.Name, autoCompleteFalseOperation.Name)));
}
}
}
}
OperationDescription GetAutoCompleteFalseOperation(ServiceEndpoint endpoint)
{
foreach (OperationDescription operation in endpoint.Contract.Operations)
{
if (!IsAutoComplete(operation))
{
return operation;
}
}
return null;
}
void ValidateTransactionAutoCompleteOnSessionCloseHasSession(ServiceDescription service)
{
ServiceBehaviorAttribute serviceBehavior = service.Behaviors.Find<ServiceBehaviorAttribute>();
if (serviceBehavior != null)
{
InstanceContextMode instanceMode = serviceBehavior.InstanceContextMode;
if (serviceBehavior.TransactionAutoCompleteOnSessionClose &&
instanceMode != InstanceContextMode.PerSession)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
SR.GetString(SR.SFxTransactionAutoCompleteOnSessionCloseNoSession, service.Name)));
}
}
}
void ValidateServiceBehaviorAttributeWithNoScopeRequired(ServiceDescription service)
{
// If the service has no operations with TransactionScopeRequired=true, disallow any
// transaction-related properties on the ServiceBehaviorAttribute
if (!HasTransactedOperations(service))
{
ServiceBehaviorAttribute attribute = service.Behaviors.Find<ServiceBehaviorAttribute>();
if (attribute != null)
{
if (attribute.TransactionTimeoutSet)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
SR.GetString(SR.SFxTransactionTransactionTimeoutNeedsScope, service.Name)));
}
if (attribute.IsolationLevelSet)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
SR.GetString(SR.SFxTransactionIsolationLevelNeedsScope, service.Name)));
}
if (attribute.ReleaseServiceInstanceOnTransactionCompleteSet)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
SR.GetString(SR.SFxTransactionReleaseServiceInstanceOnTransactionCompleteNeedsScope, service.Name)));
}
if (attribute.TransactionAutoCompleteOnSessionCloseSet)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
SR.GetString(SR.SFxTransactionTransactionAutoCompleteOnSessionCloseNeedsScope, service.Name)));
}
}
}
}
void EnsureNoOneWayTransactions(ServiceEndpoint endpoint)
{
CustomBinding binding = new CustomBinding(endpoint.Binding);
TransactionFlowBindingElement txFlowBindingElement = binding.Elements.Find<TransactionFlowBindingElement>();
if (txFlowBindingElement != null)
{
for (int i = 0; i < endpoint.Contract.Operations.Count; i++)
{
OperationDescription operation = endpoint.Contract.Operations[i];
if (operation.IsOneWay)
{
TransactionFlowAttribute tfbp = operation.Behaviors.Find<TransactionFlowAttribute>();
TransactionFlowOption transactions;
if (tfbp != null)
{
transactions = tfbp.Transactions;
}
else
{
transactions = TransactionFlowOption.NotAllowed;
}
if (TransactionFlowOptionHelper.AllowedOrRequired(transactions))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
SR.GetString(SR.SFxOneWayAndTransactionsIncompatible, endpoint.Contract.Name, operation.Name)));
}
}
}
}
}
bool HasTransactedOperations(ServiceDescription service)
{
for (int i = 0; i < service.Endpoints.Count; i++)
{
if (HasTransactedOperations(service.Endpoints[i]))
{
return true;
}
}
return false;
}
bool HasTransactedOperations(ServiceEndpoint endpoint)
{
for (int j = 0; j < endpoint.Contract.Operations.Count; j++)
{
OperationDescription operation = endpoint.Contract.Operations[j];
OperationBehaviorAttribute attribute = operation.Behaviors.Find<OperationBehaviorAttribute>();
if (attribute != null && attribute.TransactionScopeRequired)
{
return true;
}
}
return false;
}
bool IsSingleThreaded(ServiceDescription service)
{
ServiceBehaviorAttribute attribute = service.Behaviors.Find<ServiceBehaviorAttribute>();
if (attribute != null)
{
return (attribute.ConcurrencyMode == ConcurrencyMode.Single);
}
// The default is ConcurrencyMode.Single
return true;
}
bool IsAutoComplete(OperationDescription operation)
{
OperationBehaviorAttribute attribute = operation.Behaviors.Find<OperationBehaviorAttribute>();
if (attribute != null)
{
return attribute.TransactionAutoComplete;
}
// The default is TransactionAutoComplete=true
return true;
}
bool RequiresSessions(ServiceEndpoint endpoint)
{
return endpoint.Contract.SessionMode == SessionMode.Required;
}
void ValidateScopeRequiredAndAutoComplete(OperationDescription operation,
bool singleThreaded,
string contractName)
{
OperationBehaviorAttribute attribute = operation.Behaviors.Find<OperationBehaviorAttribute>();
if (attribute != null)
{
if (!singleThreaded && !attribute.TransactionAutoComplete)
{
string id = SR.SFxTransactionNonConcurrentOrAutoComplete2;
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
SR.GetString(id, contractName, operation.Name)));
}
}
}
void ValidateNoMSMQandTransactionFlow(ServiceEndpoint endpoint)
{
BindingElementCollection bindingElements = endpoint.Binding.CreateBindingElements();
if (bindingElements.Find<TransactionFlowBindingElement>() != null &&
bindingElements.Find<MsmqTransportBindingElement>() != null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(
SR.GetString(SR.SFxTransactionFlowAndMSMQ, endpoint.Address.Uri.AbsoluteUri)));
}
}
void ValidateNotConcurrentWhenReleaseServiceInstanceOnTxComplete(ServiceDescription service)
{
ServiceBehaviorAttribute attribute = service.Behaviors.Find<ServiceBehaviorAttribute>();
if (attribute != null && HasTransactedOperations(service))
{
if (attribute.ReleaseServiceInstanceOnTransactionComplete && !IsSingleThreaded(service))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new InvalidOperationException(SR.GetString(
SR.SFxTransactionNonConcurrentOrReleaseServiceInstanceOnTxComplete, service.Name)));
}
}
}
}
}
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