private async Task <RemoteHostClient.Session> TryGetSessionAsync()
{
using (await _gate.DisposableWaitAsync(_cancellationToken).ConfigureAwait(false))
{
if (_sessionDoNotAccessDirectly != null)
{
return(_sessionDoNotAccessDirectly);
}
if (_client == null)
{
// client can be null if host is shutting down
return(null);
}
// We create a single session and use it for the entire lifetime of this process.
// That single session will be used to do all communication with the remote process.
// This is because each session will cause a new instance of the RemoteSymbolSearchUpdateEngine
// to be created on the remote side. We only want one instance of that type. The
// alternative is to make that type static variable on the remote side. But that's
// much less clean and would make some of the state management much more complex.
_sessionDoNotAccessDirectly = await _client.TryCreateServiceSessionAsync(
WellKnownServiceHubServices.RemoteSymbolSearchUpdateEngine,
_logService,
_cancellationToken).ConfigureAwait(false);
return(_sessionDoNotAccessDirectly);
}
}