PhysicalLogManager(LogManager.LoggerType LoggerType)
{
switch (LoggerType)
{
case LogManager.LoggerType.Inproc:
{
NativeLog.CreateLogManagerInproc(out this._NativeManager);
_LoggerType = LogManager.LoggerType.Inproc;
break;
}
case LogManager.LoggerType.Driver:
{
NativeLog.CreateLogManager(out this._NativeManager);
_LoggerType = LogManager.LoggerType.Driver;
break;
}
default:
{
throw new InvalidOperationException("Invalid LogManager.LoggerType");
}
}
}
InternalCreateAsync(LogManager.LoggerType logManagerType, CancellationToken cancellationToken)
{
Handle result = null;
PhysicalLogManager newManager = null;
Exception caughtException = null;
await _Lock.WaitUntilSetAsync(cancellationToken).ConfigureAwait(false);
try
{
if (_AppDomainPhysLogManager == null)
{
if (logManagerType == LogManager.LoggerType.Default)
{
//
// Try to open driver first and if it fails then try inproc
//
try
{
newManager = new PhysicalLogManager(LogManager.LoggerType.Driver);
await newManager.OpenAsync(cancellationToken).ConfigureAwait(false);
}
catch (System.IO.FileNotFoundException)
{
AppTrace.TraceSource.WriteInfo(TraceType, "InternalCreateAsync: FileNotFound returned when trying to open Driver. Proceeding with an Inproc log.");
//
// Don't fail if driver isn't loaded
//
newManager = null;
}
if (newManager == null)
{
//
// Now try inproc
//
newManager = new PhysicalLogManager(LogManager.LoggerType.Inproc);
await newManager.OpenAsync(cancellationToken).ConfigureAwait(false);
}
}
else
{
//
// Only try to open a specific log manager type
//
newManager = new PhysicalLogManager(logManagerType);
await newManager.OpenAsync(cancellationToken).ConfigureAwait(false);
}
_LoggerType = newManager.GetLoggerType();
_AppDomainPhysLogManager = newManager; // No error during Open -
}
_NextHandleId++;
result = new Handle(_NextHandleId);
_Handles.Add(_NextHandleId, new WeakReference <Handle>(result, false));
result.IsOpen = true;
newManager = null;
}
catch (Exception ex)
{
caughtException = ex; // for later re-throw
if (result != null)
{
// Undo handle creation
result.IsOpen = false;
_Handles.Remove(result.Id);
}
if (newManager != null)
{
// Reverse creation of AppDomain singleton
_AppDomainPhysLogManager = null;
_LoggerType = LogManager.LoggerType.Unknown;
}
}
finally
{
_Lock.Set();
}
if (caughtException != null)
{
if (newManager != null)
{
// Finish reversal of creation of AppDomain singleton
await newManager.CloseAsync(cancellationToken).ConfigureAwait(false);
}
throw caughtException;
}
return(result);
}
/// <summary>
/// Open access to the Logical Log Manager API
/// </summary>
/// <param name="logManagerType">Specifies the type of log manager to use</param>
/// <param name="cancellationToken">Used to cancel the OpenAsync operation</param>
/// <returns>Caller's ILogManager (Handle)</returns>
public static Task <ILogManager> OpenAsync(LogManager.LoggerType logManagerType, CancellationToken cancellationToken)
{
return(InternalCreateAsync(logManagerType, cancellationToken));
}
