/// <summary>
/// Setups the maintenance channel.
/// </summary>
private async void SetupMaintenanceConnection(Logger logger)
{
try
{
if (_maintenanceConnection == null || !_maintenanceConnection.IsConnected)
{
//setup maintenance connection
logger.LogVerbose("Creating new maintenance connection");
//pick a random node from the list
var strategy = new RandomConnectionStrategy(_nodes, _config);
//get or create a connection
var connection = strategy.GetOrCreateConnection(null);
//allow this connection to be used by others as well
_connectionSelector.ReturnConnection(connection);
//setup event handlers
connection.OnConnectionChange += (src, ev) => SetupMaintenanceConnection(logger);
connection.OnClusterChange += OnClusterChange;
//store the new connection
_maintenanceConnection = connection;
//register for events
await connection.RegisterForClusterChangesAsync(logger).ConfigureAwait(false);
logger.LogInfo("Registered for cluster changes using {0}", connection);
}
//all seems right, we're done
return;
}
catch (Exception ex)
{
logger.LogWarning("Failed to setup maintenance connection: {0}", ex);
//temporary disconnect or registration failed, reset maintenance connection
_maintenanceConnection = null;
}
//wait a moment, try again
logger.LogVerbose("Waiting 2secs before retrying setup maintenance connection");
await Task.Delay(2000).ConfigureAwait(false);
SetupMaintenanceConnection(logger);
}
