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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Diagnostics;
namespace System.Data.SqlClient.Tests
{
public sealed class FakeDiagnosticListenerObserver : IObserver<DiagnosticListener>
{
private class FakeDiagnosticSourceWriteObserver : IObserver<KeyValuePair<string, object>>
{
private readonly Action<KeyValuePair<string, object>> _writeCallback;
public FakeDiagnosticSourceWriteObserver(Action<KeyValuePair<string, object>> writeCallback)
{
_writeCallback = writeCallback;
}
public void OnCompleted()
{
}
public void OnError(Exception error)
{
}
public void OnNext(KeyValuePair<string, object> value)
{
_writeCallback(value);
}
}
private readonly Action<KeyValuePair<string, object>> _writeCallback;
private bool _writeObserverEnabled;
public FakeDiagnosticListenerObserver(Action<KeyValuePair<string, object>> writeCallback)
{
_writeCallback = writeCallback;
}
public void OnCompleted()
{
}
public void OnError(Exception error)
{
}
public void OnNext(DiagnosticListener value)
{
if (value.Name.Equals("SqlClientDiagnosticListener"))
{
value.Subscribe(new FakeDiagnosticSourceWriteObserver(_writeCallback), IsEnabled);
}
}
public void Enable()
{
_writeObserverEnabled = true;
}
public void Disable()
{
_writeObserverEnabled = false;
}
private bool IsEnabled(string s)
{
return _writeObserverEnabled;
}
}
}
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