//============================================================================================= //[SuppressMessage(FxCop.Category.Security, FxCop.Rule.AptcaMethodsShouldOnlyCallAptcaMethods, Justification = "We call PartialTrustHelpers.DemandForFullTrust().")] CoordinationService GetCoordinationService() { if (this.coordinationService == null) { lock (this.proxyLock) { if (this.coordinationService == null) { // The demand is not added now (in 4.5), to avoid a breaking change. To be considered in the next version. /* * // We demand full trust because CoordinationService is defined in a non-APTCA assembly and can call Environment.FailFast. * // It's recommended to not let partially trusted callers to bring down the process. * System.Runtime.PartialTrustHelpers.DemandForFullTrust(); */ try { CoordinationServiceConfiguration config = new CoordinationServiceConfiguration(); config.Mode = CoordinationServiceMode.Formatter; config.RemoteClientsEnabled = this.wsatConfig.RemoteActivationService(this.protocolVersion) != null; this.coordinationService = new CoordinationService(config, this.protocolVersion); } catch (MessagingInitializationException e) { DiagnosticUtility.TraceHandledException(e, TraceEventType.Error); throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new TransactionException(SR.GetString(SR.WsatMessagingInitializationFailed), e)); } } } } return(this.coordinationService); }
static byte[] CreateFixedPropagationToken() { if (fixedPropagationToken == null) { CommittableTransaction tx = new CommittableTransaction(); byte[] token = TransactionInterop.GetTransmitterPropagationToken(tx); // Don't abort the transaction. People notice this and do not like it. try { tx.Commit(); } catch (TransactionException e) { DiagnosticUtility.TraceHandledException(e, TraceEventType.Information); } Interlocked.CompareExchange <byte[]>(ref fixedPropagationToken, token, null); } byte[] tokenCopy = new byte[fixedPropagationToken.Length]; Array.Copy(fixedPropagationToken, tokenCopy, fixedPropagationToken.Length); return(tokenCopy); }
//============================================================================================= // The demand is not added now (in 4.5), to avoid a breaking change. To be considered in the next version. /* * // We demand full trust because we call ActivationProxy.Release(), which is defined in a non-APTCA assembly and can do Environment.FailFast. * // It's recommended to not let partially trusted callers to bring down the process. * // WSATs are not supported in partial trust, so customers should not be broken by this demand. * [PermissionSet(SecurityAction.Demand, Unrestricted = true)] */ void RefreshActivationProxy(EndpointAddress suggestedAddress) { // Pick an address in the following order... EndpointAddress address = suggestedAddress; if (address == null) { address = this.wsatConfig.LocalActivationService(this.protocolVersion); if (address == null) { address = this.wsatConfig.RemoteActivationService(this.protocolVersion); } } if (!(address != null)) { // tx processing requires failfast when state is inconsistent DiagnosticUtility.FailFast("Must have valid activation service address"); } lock (this.proxyLock) { ActivationProxy newProxy = CreateActivationProxy(address); if (this.activationProxy != null) { this.activationProxy.Release(); } this.activationProxy = newProxy; } }
//============================================================================================= // The demand is not added now (in 4.5), to avoid a breaking change. To be considered in the next version. /* * // We demand full trust because we use CreateCoordinationContext from a non-APTCA assembly and the CreateCoordinationContext constructor does an Environment.FailFast * // if the argument is invalid. It's recommended to not let partially trusted callers to bring down the process. * // WSATs are not supported in partial trust, so customers should not be broken by this demand. * [PermissionSet(SecurityAction.Demand, Unrestricted = true)] */ CoordinationContext CreateCoordinationContext(WsatTransactionInfo info) { CreateCoordinationContext cccMessage = new CreateCoordinationContext(this.protocolVersion); cccMessage.CurrentContext = info.Context; cccMessage.IssuedToken = info.IssuedToken; try { // This was necessary during some portions of WCF 1.0 development // It is probably not needed now. However, it seems conceptually // solid to separate this operation from the incoming app message as // much as possible. There have also been enough ServiceModel bugs in // this area that it does not seem wise to remove this at the moment // (2006/3/30, WCF 1.0 RC1 milestone) using (new OperationContextScope((OperationContext)null)) { return(Enlist(ref cccMessage).CoordinationContext); } } catch (WsatFaultException e) { DiagnosticUtility.TraceHandledException(e, TraceEventType.Error); throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new TransactionException(SR.GetString(SR.UnmarshalTransactionFaulted, e.Message), e)); } catch (WsatSendFailureException e) { DiagnosticUtility.TraceHandledException(e, TraceEventType.Error); throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new TransactionManagerCommunicationException(SR.GetString(SR.TMCommunicationError), e)); } }
//============================================================================================= void TryStartMsdtcService() { try { TransactionInterop.GetWhereabouts(); } catch (TransactionException e) { DiagnosticUtility.TraceHandledException(e, TraceEventType.Warning); } }
//============================================================================================= // The demand is not added now (in 4.5), to avoid a breaking change. To be considered in the next version. /* * [PermissionSet(SecurityAction.Demand, Unrestricted = true)] // because we call code from a non-APTCA assembly; WSATs are not supported in partial trust, so customers should not be broken by this demand */ ActivationProxy CreateActivationProxy(EndpointAddress address) { CoordinationService coordination = GetCoordinationService(); try { return(coordination.CreateActivationProxy(address, false)); } catch (CreateChannelFailureException e) { DiagnosticUtility.TraceHandledException(e, TraceEventType.Error); throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new TransactionException(SR.GetString(SR.WsatProxyCreationFailed), e)); } }
public Transaction UnmarshalTransaction(WsatTransactionInfo info) { if (info.Context.ProtocolVersion != this.protocolVersion) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new ArgumentException(SR.GetString(SR.InvalidWsatProtocolVersion))); } if (wsatConfig.OleTxUpgradeEnabled) { byte[] propToken = info.Context.PropagationToken; if (propToken != null) { try { return(OleTxTransactionInfo.UnmarshalPropagationToken(propToken)); } catch (TransactionException e) { DiagnosticUtility.TraceHandledException(e, TraceEventType.Warning); } // Fall back to WS-AT unmarshal if (DiagnosticUtility.ShouldTraceInformation) { TraceUtility.TraceEvent(TraceEventType.Information, TraceCode.TxFailedToNegotiateOleTx, SR.GetString(SR.TraceCodeTxFailedToNegotiateOleTx, info.Context.Identifier)); } } } // Optimization: if the context's registration service points to our local TM, we can // skip the CreateCoordinationContext step CoordinationContext localContext = info.Context; if (!this.wsatConfig.IsLocalRegistrationService(localContext.RegistrationService, this.protocolVersion)) { // Our WS-AT protocol service for the context's protocol version should be enabled if (!this.wsatConfig.IsProtocolServiceEnabled(this.protocolVersion)) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new TransactionException(SR.GetString(SR.WsatProtocolServiceDisabled, this.protocolVersion))); } // We should have enabled inbound transactions if (!this.wsatConfig.InboundEnabled) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new TransactionException(SR.GetString(SR.InboundTransactionsDisabled))); } // The sender should have enabled both WS-AT and outbound transactions if (this.wsatConfig.IsDisabledRegistrationService(localContext.RegistrationService)) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new TransactionException(SR.GetString(SR.SourceTransactionsDisabled))); } // Ask the WS-AT protocol service to unmarshal the transaction localContext = CreateCoordinationContext(info); } Guid transactionId = localContext.LocalTransactionId; if (transactionId == Guid.Empty) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError( new TransactionException(SR.GetString(SR.InvalidCoordinationContextTransactionId))); } byte[] propagationToken = MarshalPropagationToken(ref transactionId, localContext.IsolationLevel, localContext.IsolationFlags, localContext.Description); return(OleTxTransactionInfo.UnmarshalPropagationToken(propagationToken)); }
//============================================================================================= // The demand is not added now (in 4.5), to avoid a breaking change. To be considered in the next version. /* * [PermissionSet(SecurityAction.Demand, Unrestricted = true)] // because we call code from a non-APTCA assembly; WSATs are not supported in partial trust, so customers should not be broken by this demand */ CreateCoordinationContextResponse Enlist(ref CreateCoordinationContext cccMessage) { int attempts = 0; while (true) { ActivationProxy proxy = GetActivationProxy(); EndpointAddress address = proxy.To; EndpointAddress localActivationService = this.wsatConfig.LocalActivationService(this.protocolVersion); EndpointAddress remoteActivationService = this.wsatConfig.RemoteActivationService(this.protocolVersion); try { return(proxy.SendCreateCoordinationContext(ref cccMessage)); } catch (WsatSendFailureException e) { DiagnosticUtility.TraceHandledException(e, TraceEventType.Warning); // Don't retry if we're not likely to succeed on the next pass Exception inner = e.InnerException; if (inner is TimeoutException || inner is QuotaExceededException || inner is FaultException) { throw; } // Give up after 10 attempts if (attempts > 10) { throw; } if (attempts > 5 && remoteActivationService != null && ReferenceEquals(address, localActivationService)) { // Switch over to the remote activation service. // In clustered scenarios this uses the cluster name, // so it should always work if the resource is online // This covers the case where we were using a local cluster // resource which failed over to another node address = remoteActivationService; } } finally { proxy.Release(); } TryStartMsdtcService(); // We need to refresh our proxy here because the channel is sessionful // and may simply decided to enter the faulted state if something fails. RefreshActivationProxy(address); // Don't spin Thread.Sleep(0); attempts++; } }