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DiagnosticObserver.cs
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DiagnosticObserver.cs
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// Copyright (c) .NET Core Community. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Reflection;
using DotNetCore.CAP.Internal;
using Microsoft.Data.SqlClient;
namespace DotNetCore.CAP.SqlServer.Diagnostics;
internal class DiagnosticObserver : IObserver<KeyValuePair<string, object?>>
{
public const string SqlAfterCommitTransactionMicrosoft = "Microsoft.Data.SqlClient.WriteTransactionCommitAfter";
public const string SqlErrorCommitTransactionMicrosoft = "Microsoft.Data.SqlClient.WriteTransactionCommitError";
public const string SqlAfterRollbackTransactionMicrosoft = "Microsoft.Data.SqlClient.WriteTransactionRollbackAfter";
public const string SqlBeforeCloseConnectionMicrosoft = "Microsoft.Data.SqlClient.WriteConnectionCloseBefore";
private readonly ConcurrentDictionary<Guid, SqlServerCapTransaction> _transBuffer;
public DiagnosticObserver(ConcurrentDictionary<Guid, SqlServerCapTransaction> bufferTrans)
{
_transBuffer = bufferTrans;
}
public void OnCompleted()
{
}
public void OnError(Exception error)
{
}
public void OnNext(KeyValuePair<string, object?> evt)
{
switch (evt.Key)
{
case SqlAfterCommitTransactionMicrosoft:
{
if (!TryGetSqlConnection(evt, out var sqlConnection)) return;
var transactionKey = sqlConnection.ClientConnectionId;
if (_transBuffer.TryRemove(transactionKey, out var transaction))
{
if (GetProperty(evt.Value, "Operation") as string == "Rollback")
{
transaction.Dispose();
return;
}
transaction.DbTransaction = new NoopTransaction();
transaction.Commit();
transaction.Dispose();
}
break;
}
case SqlErrorCommitTransactionMicrosoft or SqlAfterRollbackTransactionMicrosoft
or SqlBeforeCloseConnectionMicrosoft:
{
if (!_transBuffer.IsEmpty)
{
if (!TryGetSqlConnection(evt, out var sqlConnection)) return;
var transactionKey = sqlConnection.ClientConnectionId;
if (_transBuffer.TryRemove(transactionKey, out var transaction))
{
transaction.Dispose();
}
}
break;
}
}
}
private static bool TryGetSqlConnection(KeyValuePair<string, object?> evt,
[NotNullWhen(true)] out SqlConnection? sqlConnection)
{
sqlConnection = GetProperty(evt.Value, "Connection") as SqlConnection;
return sqlConnection != null;
}
private static object? GetProperty(object? @this, string propertyName)
{
return @this?.GetType().GetTypeInfo().GetDeclaredProperty(propertyName)?.GetValue(@this);
}
}