123 lines
4.6 KiB
C#
123 lines
4.6 KiB
C#
//------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------
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namespace System.ServiceModel.Transactions
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{
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using System;
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using System.Runtime.InteropServices;
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using System.ServiceModel;
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using System.ServiceModel.Channels;
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using System.Transactions;
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class OleTxTransactionFormatter : TransactionFormatter
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{
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static OleTxTransactionHeader emptyTransactionHeader = new OleTxTransactionHeader(null, null);
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public override MessageHeader EmptyTransactionHeader
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{
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get { return emptyTransactionHeader; }
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}
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public override void WriteTransaction(Transaction transaction, Message message)
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{
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byte[] propToken = TransactionInterop.GetTransmitterPropagationToken(transaction);
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// Find or compute extended information for the transaction
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WsatExtendedInformation info;
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if (!WsatExtendedInformationCache.Find(transaction, out info))
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{
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uint timeout = GetTimeoutFromTransaction(transaction);
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info = (timeout != 0) ? new WsatExtendedInformation(null, timeout) : null;
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}
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OleTxTransactionHeader header = new OleTxTransactionHeader(propToken, info);
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message.Headers.Add(header);
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}
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public override TransactionInfo ReadTransaction(Message message)
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{
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OleTxTransactionHeader header = OleTxTransactionHeader.ReadFrom(message);
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if (header == null)
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return null;
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return new OleTxTransactionInfo(header);
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}
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public static uint GetTimeoutFromTransaction(Transaction transaction)
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{
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// For transactions created inside this process, we can ask ITransactionOptions
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IDtcTransaction dtcTransaction = TransactionInterop.GetDtcTransaction(transaction);
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ITransactionOptions transactionOptions = (ITransactionOptions)dtcTransaction;
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XACTOPT options;
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transactionOptions.GetOptions(out options);
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// For transactions not created inside this process, this will return zero
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return options.ulTimeout;
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}
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public static void GetTransactionAttributes(Transaction transaction,
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out uint timeout,
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out IsolationFlags isoFlags,
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out string description)
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{
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IDtcTransaction dtcTransaction = TransactionInterop.GetDtcTransaction(transaction);
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ITransactionOptions transactionOptions = (ITransactionOptions)dtcTransaction;
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ISaneDtcTransaction saneTransaction = (ISaneDtcTransaction)dtcTransaction;
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XACTOPT options;
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transactionOptions.GetOptions(out options);
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// For transactions not created inside this process, this will be zero
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timeout = options.ulTimeout;
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description = options.szDescription;
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XACTTRANSINFO info;
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saneTransaction.GetTransactionInfo(out info);
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isoFlags = info.isoFlags;
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}
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[StructLayout(LayoutKind.Sequential, Pack = 4, CharSet = CharSet.Ansi)]
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struct XACTOPT
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{
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public uint ulTimeout;
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[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 40)]
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public string szDescription;
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}
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[StructLayout(LayoutKind.Sequential, Pack = 4)]
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struct XACTTRANSINFO
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{
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public Guid uow;
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public IsolationLevel isoLevel;
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public IsolationFlags isoFlags;
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public uint grfTCSupported;
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public uint grfRMSupported;
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public uint grfTCSupportedRetaining;
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public uint grfRMSupportedRetaining;
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}
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[ComImport,
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Guid("3A6AD9E0-23B9-11cf-AD60-00AA00A74CCD"),
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InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
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interface ITransactionOptions
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{
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void SetOptions([In] ref XACTOPT pOptions);
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void GetOptions([Out] out XACTOPT pOptions);
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}
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[ComImport,
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GuidAttribute("0fb15084-af41-11ce-bd2b-204c4f4f5020"),
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InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
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interface ISaneDtcTransaction
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{
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void Abort(IntPtr reason, int retaining, int async);
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void Commit(int retaining, int commitType, int reserved);
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void GetTransactionInfo(out XACTTRANSINFO transactionInformation);
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}
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}
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}
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