private CursorBatch <TDocument> GetNextBatch(CancellationToken cancellationToken)
{
using (EventContext.BeginOperation(_operationId))
using (var channel = _channelSource.GetChannel(cancellationToken))
{
if (SupportedFeatures.IsFindCommandSupported(channel.ConnectionDescription.ServerVersion))
{
return(ExecuteGetMoreCommand(channel, cancellationToken));
}
else
{
return(ExecuteGetMoreProtocol(channel, cancellationToken));
}
}
}
private async Task <CursorBatch <TDocument> > GetNextBatchAsync(CancellationToken cancellationToken)
{
using (EventContext.BeginOperation(_operationId))
using (var channel = await _channelSource.GetChannelAsync(cancellationToken).ConfigureAwait(false))
{
if (SupportedFeatures.IsFindCommandSupported(channel.ConnectionDescription.ServerVersion))
{
return(await ExecuteGetMoreCommandAsync(channel, cancellationToken).ConfigureAwait(false));
}
else
{
return(await ExecuteGetMoreProtocolAsync(channel, cancellationToken).ConfigureAwait(false));
}
}
}
private IReadOperation <IAsyncCursor <TDocument> > CreateOperation(SemanticVersion serverVersion)
{
var hasExplainModifier = _modifiers != null && _modifiers.Contains("$explain");
if (SupportedFeatures.IsFindCommandSupported(serverVersion) && !hasExplainModifier)
{
return(CreateFindCommandOperation());
}
else
{
// this is here because FindOpcodeOperation doesn't support
// read concern
_readConcern.ThrowIfNotSupported(serverVersion);
return(CreateFindOpcodeOperation());
}
}