private bool TryChangeConnectionState(
ClickHouseConnectionState state,
ConnectionState newState,
ClickHouseTcpClient?client,
out ClickHouseConnectionState actualState,
[NotNullWhen(true)] out Func <ClickHouseConnection, Exception?>?onStateChanged)
{
var counter = state.State != ConnectionState.Connecting && newState == ConnectionState.Connecting ? unchecked (state.Counter + 1) : state.Counter;
var nextState = new ClickHouseConnectionState(newState, client, state.Settings, counter);
if (TryChangeConnectionState(state, nextState, out actualState))
{
onStateChanged = CreateConnectionStateChangedCallback(state.State, actualState.State);
return(true);
}
onStateChanged = null;
return(false);
}
private bool TryChangeConnectionState(ClickHouseConnectionState from, ClickHouseConnectionState to, out ClickHouseConnectionState actualState)
{
actualState = Interlocked.CompareExchange(ref _connectionState, to, from);
if (ReferenceEquals(actualState, from))
{
actualState = to;
return(true);
}
return(false);
}
/// <summary>
/// Initializes a new instance of <see cref="ClickHouseConnection"/> class.
/// </summary>
public ClickHouseConnection()
{
_connectionState = new ClickHouseConnectionState();
}
