public async override Task <object> GetOrCreateAsync(string logIdentifier, CancellationToken cancellationToken)
{
await _initializationSemaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
try
{
if (_currentLogWriter != null)
{
// Dispose last log writer so we can start a new session. Technically only one should only ever be active at a time.
_currentLogWriter.Dispose();
}
var logInstanceNumber = Interlocked.Increment(ref s_logHubSessionId);
var traceSource = await _traceProvider.InitializeTraceAsync(logIdentifier, logInstanceNumber, cancellationToken).ConfigureAwait(false);
_currentLogWriter = new DefaultLogHubLogWriter(traceSource !);
var provider = new LogHubLoggerProvider(_currentLogWriter);
return(provider);
}
finally
{
_initializationSemaphore.Release();
}
}
// Virtual for testing
public virtual async Task InitializeLoggerAsync(CancellationToken cancellationToken)
{
if (_loggerProvider is not null)
{
return;
}
await _initializationSemaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
try
{
if (_loggerProvider is null)
{
_loggerProvider = (LogHubLoggerProvider)await _loggerFactory.GetOrCreateAsync(LogFileIdentifier, cancellationToken).ConfigureAwait(false);
}
}
finally
{
_initializationSemaphore.Release();
}
}