92 lines
3.2 KiB
C#
92 lines
3.2 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.ServiceModel.Channels;
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using System.Diagnostics;
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using System.ServiceModel;
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using System.Transactions;
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abstract class TransactionFormatter
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{
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static TransactionFormatter oleTxFormatter = new OleTxTransactionFormatter();
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static object syncRoot = new object();
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public static TransactionFormatter OleTxFormatter
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{
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get { return oleTxFormatter; }
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}
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// Double-checked locking pattern requires volatile for read/write synchronization
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static volatile TransactionFormatter wsatFormatter10;
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public static TransactionFormatter WsatFormatter10
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{
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get
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{
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if (wsatFormatter10 == null)
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{
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lock (syncRoot)
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{
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if (wsatFormatter10 == null)
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{
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wsatFormatter10 = new WsatTransactionFormatter10();
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}
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}
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}
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return wsatFormatter10;
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}
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}
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// Double-checked locking pattern requires volatile for read/write synchronization
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static volatile TransactionFormatter wsatFormatter11;
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public static TransactionFormatter WsatFormatter11
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{
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get
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{
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if (wsatFormatter11 == null)
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{
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lock (syncRoot)
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{
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if (wsatFormatter11 == null)
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{
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wsatFormatter11 = new WsatTransactionFormatter11();
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}
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}
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}
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return wsatFormatter11;
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}
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}
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public abstract MessageHeader EmptyTransactionHeader
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{
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get;
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}
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// Write transaction information to a message
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//
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// Return the transaction protocols that were successfully written to the message
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// Throw TransactionException if something goes wrong (e.g., TM comms failure)
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public abstract void WriteTransaction(Transaction transaction, Message message);
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// Read transaction information from a message
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//
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// Return a TransactionInfo instance if transaction headers are present in the message
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// Return null if no transaction headers are present in the message
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// Throw TransactionException if something goes wrong (e.g., malformed XML)
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public abstract TransactionInfo ReadTransaction(Message message);
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}
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abstract class TransactionInfo
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{
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// Convert transaction information from a message into an actual transaction
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//
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// Return a transaction instance if successful (fallback down the list of protocols as needed)
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// Throw TransactionException if a could not be unmarshaled.
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//
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// Should not throw an exception
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public abstract Transaction UnmarshalTransaction();
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}
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}
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