public LogicalLogInfo(LogicalLog logicalLog, IPhysicalLogStream underlyingStream)
{
this.LogicalLog = new WeakReference <LogicalLog>(logicalLog);
this.UnderlyingStream = underlyingStream;
}
OnOpenLogicalLogAsync(
Handle owningHandle,
Guid logicalLogId,
string traceType,
CancellationToken cancellationToken)
{
await this._PhysicalLogLock.WaitUntilSetAsync(cancellationToken).ConfigureAwait(false);
try
{
LogicalLog logicalLog = null;
LogicalLogInfo llInfo;
if ((this._LogicalLogs.TryGetValue(logicalLogId, out llInfo) == false) ||
(llInfo.LogicalLog.TryGetTarget(out logicalLog) == false))
{
// LLog has not been opened or created - attempt to open it
IPhysicalLogStream underlyingStream = null;
var retries = 0;
const int retryLimit = 3;
do
{
try
{
underlyingStream = await this._Container.OpenPhysicalLogStreamAsync(
logicalLogId,
cancellationToken).ConfigureAwait(false);
retries = retryLimit;
}
catch (System.IO.FileLoadException ex)
{
retries++;
if ((ex.HResult != unchecked ((int)0x80070020)) ||
(retries == retryLimit))
{
throw;
}
}
} while (retries < retryLimit);
Exception caughtException = null;
LogicalLog newLogicalLog = null;
try
{
newLogicalLog = new LogicalLog(this, owningHandle.Id, logicalLogId, underlyingStream, traceType);
this._LogicalLogs.Add(logicalLogId, new LogicalLogInfo(newLogicalLog, underlyingStream));
newLogicalLog.IsOpen = true;
await newLogicalLog.OnRecoverAsync(cancellationToken).ConfigureAwait(false);
}
catch (Exception ex)
{
// Cause clean up failed create
caughtException = ex;
}
if (caughtException != null)
{
// clean up failed create and forward the causing exception
if (newLogicalLog != null)
{
newLogicalLog.IsOpen = false;
this._LogicalLogs.Remove(logicalLogId);
}
// TODO: Consider adding trace output when secondary exceptions occur
try
{
await underlyingStream.CloseAsync(cancellationToken).ConfigureAwait(false);
}
catch
{
}
throw caughtException;
}
return(newLogicalLog);
}
else
{
// Already open - fault - only exclusive opens supported
throw new UnauthorizedAccessException();
}
}
finally
{
this._PhysicalLogLock.Set();
}
}
