private TransactionContext CreateTransactionContext()
{
Microsoft.Transactions.Bridge.EnlistmentOptions enlistmentOptions = this.enlistment.EnlistmentOptions;
string remoteTransactionId = this.enlistment.RemoteTransactionId;
Guid localTransactionId = this.enlistment.LocalTransactionId;
CoordinationContext context = new CoordinationContext(this.state.ProtocolVersion)
{
Expires = (enlistmentOptions.Expires == TimeSpan.MaxValue) ? uint.MaxValue : ((uint)((int)enlistmentOptions.Expires.TotalMilliseconds)),
Identifier = remoteTransactionId,
LocalTransactionId = localTransactionId,
IsolationLevel = enlistmentOptions.IsoLevel,
IsolationFlags = enlistmentOptions.IsolationFlags,
Description = enlistmentOptions.Description
};
string contextId = CoordinationContext.IsNativeIdentifier(remoteTransactionId, localTransactionId) ? null : remoteTransactionId;
string sctId = null;
RequestSecurityTokenResponse issuedToken = null;
if (this.state.Config.PortConfiguration.SupportingTokensEnabled)
{
CoordinationServiceSecurity.CreateIssuedToken(localTransactionId, remoteTransactionId, this.state.ProtocolVersion, out issuedToken, out sctId);
}
AddressHeader refParam = new WsatRegistrationHeader(localTransactionId, contextId, sctId);
context.RegistrationService = this.state.RegistrationCoordinatorListener.CreateEndpointReference(refParam);
return(new TransactionContext(context, issuedToken));
}
//=======================================================================================
// 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 CoordinationServiceSecurity from a non-APTCA assembly and CoordinationServiceSecurity.GetIssuedToken(..) can call 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)]
*/
public override TransactionInfo ReadTransaction(Message message)
{
EnsureInitialized();
CoordinationContext context = WsatTransactionHeader.GetCoordinationContext(message, this.protocolVersion);
if (context == null)
{
return(null);
}
// Incoming transaction tokens are optional
RequestSecurityTokenResponse issuedToken;
try
{
issuedToken = CoordinationServiceSecurity.GetIssuedToken(message, context.Identifier, this.protocolVersion);
}
catch (XmlException e)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new TransactionException(SR.FailedToDeserializeIssuedToken, e));
}
return(new WsatTransactionInfo(this.wsatProxy, context, issuedToken));
}
public void MarshalAsCoordinationContext(Transaction transaction, out CoordinationContext context, out RequestSecurityTokenResponse issuedToken)
{
uint num;
IsolationFlags flags;
string str2;
WsatExtendedInformation information;
string str3;
Guid distributedIdentifier = transaction.TransactionInformation.DistributedIdentifier;
string contextId = null;
context = new CoordinationContext(this.protocolVersion);
OleTxTransactionFormatter.GetTransactionAttributes(transaction, out num, out flags, out str2);
context.IsolationFlags = flags;
context.Description = str2;
if (TransactionCache <Transaction, WsatExtendedInformation> .Find(transaction, out information))
{
context.Expires = information.Timeout;
if (!string.IsNullOrEmpty(information.Identifier))
{
context.Identifier = information.Identifier;
contextId = information.Identifier;
}
}
else
{
context.Expires = num;
if (context.Expires == 0)
{
context.Expires = (uint)TimeoutHelper.ToMilliseconds(this.wsatConfig.MaxTimeout);
}
}
if (context.Identifier == null)
{
context.Identifier = CoordinationContext.CreateNativeIdentifier(distributedIdentifier);
contextId = null;
}
if (!this.wsatConfig.IssuedTokensEnabled)
{
str3 = null;
issuedToken = null;
}
else
{
CoordinationServiceSecurity.CreateIssuedToken(distributedIdentifier, context.Identifier, this.protocolVersion, out issuedToken, out str3);
}
AddressHeader refParam = new WsatRegistrationHeader(distributedIdentifier, contextId, str3);
context.RegistrationService = this.wsatConfig.CreateRegistrationService(refParam, this.protocolVersion);
context.IsolationLevel = transaction.IsolationLevel;
context.LocalTransactionId = distributedIdentifier;
if (this.wsatConfig.OleTxUpgradeEnabled)
{
context.PropagationToken = TransactionInterop.GetTransmitterPropagationToken(transaction);
}
}
public override void WriteTransaction(Transaction transaction, Message message)
{
CoordinationContext context;
RequestSecurityTokenResponse response;
this.EnsureInitialized();
this.ForcePromotion(transaction);
this.MarshalAsCoordinationContext(transaction, out context, out response);
if (response != null)
{
CoordinationServiceSecurity.AddIssuedToken(message, response);
}
WsatTransactionHeader header = new WsatTransactionHeader(context, this.protocolVersion);
message.Headers.Add(header);
}
//=======================================================================================
// 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
*/
public override void WriteTransaction(Transaction transaction, Message message)
{
EnsureInitialized();
ForcePromotion(transaction);
// Make a context and add it to the message
CoordinationContext context;
RequestSecurityTokenResponse issuedToken;
MarshalAsCoordinationContext(transaction, out context, out issuedToken);
if (issuedToken != null)
{
CoordinationServiceSecurity.AddIssuedToken(message, issuedToken);
}
WsatTransactionHeader header = new WsatTransactionHeader(context, this.protocolVersion);
message.Headers.Add(header);
}
//=======================================================================================
// 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 CoordinationContext and CoordinationServiceSecurity from a non-APTCA assembly.
* // The CoordinationContext constructor can call Environment.FailFast and 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)]
*/
public void MarshalAsCoordinationContext(Transaction transaction,
out CoordinationContext context,
out RequestSecurityTokenResponse issuedToken)
{
Guid transactionId = transaction.TransactionInformation.DistributedIdentifier;
string nonNativeContextId = null;
context = new CoordinationContext(this.protocolVersion);
// Get timeout, description and isolation flags
uint timeout;
IsolationFlags isoFlags;
string description;
OleTxTransactionFormatter.GetTransactionAttributes(transaction,
out timeout,
out isoFlags,
out description);
context.IsolationFlags = isoFlags;
context.Description = description;
// If we can, use cached extended information
// Note - it may be worth using outgoing contexts more than once.
// We'll let performance profiling decide that question
WsatExtendedInformation info;
if (WsatExtendedInformationCache.Find(transaction, out info))
{
context.Expires = info.Timeout;
// The extended info cache only contains an identifier when it's non-native
if (!string.IsNullOrEmpty(info.Identifier))
{
context.Identifier = info.Identifier;
nonNativeContextId = info.Identifier;
}
}
else
{
context.Expires = timeout;
if (context.Expires == 0)
{
// If the timeout is zero, there are two possibilities:
// 1) This is a root transaction with an infinite timeout.
// 2) This is a subordinate transaction whose timeout was not flowed.
// We have no mechanism for distinguishing between the two cases.
//
// We could always return zero here, instead of using the local max timeout.
// The problem is that the 2004/08 WS-C spec does not specify the meaning
// of a zero expires field. While we accept zero to mean "as large as possible"
// it would be risky to expect others to do the same. So we only propagate
// zero in the expires field if the local max timeout has been disabled.
//
// This is MB 34596: how can we flow the real timeout?
context.Expires = (uint)TimeoutHelper.ToMilliseconds(this.wsatConfig.MaxTimeout);
}
}
if (context.Identifier == null)
{
context.Identifier = CoordinationContext.CreateNativeIdentifier(transactionId);
nonNativeContextId = null;
}
string tokenId;
if (!this.wsatConfig.IssuedTokensEnabled)
{
tokenId = null;
issuedToken = null;
}
else
{
CoordinationServiceSecurity.CreateIssuedToken(transactionId,
context.Identifier,
this.protocolVersion,
out issuedToken,
out tokenId);
}
AddressHeader refParam = new WsatRegistrationHeader(transactionId, nonNativeContextId, tokenId);
context.RegistrationService = wsatConfig.CreateRegistrationService(refParam, this.protocolVersion);
context.IsolationLevel = transaction.IsolationLevel;
context.LocalTransactionId = transactionId;
if (this.wsatConfig.OleTxUpgradeEnabled)
{
context.PropagationToken = TransactionInterop.GetTransmitterPropagationToken(transaction);
}
}
