async Task <TResponse> Unary <TRequest, TResponse>(TRequest req)
{
var now = _env.Time;
foreach (var(i, ts, mark) in GetEndpoints())
{
var endpoint = _endpoints[i];
_env.Debug($"Send '{req}' to {endpoint}");
if (ts != TimeSpan.Zero)
{
await _env.Delay(ts, _env.Token);
}
try {
using (var conn = await _env.Connect(endpoint)) {
await conn.Write(req);
var res = await conn.Read(5.Sec());
if (res is ArgumentException ex)
{
throw new ArgumentException(ex.Message);
}
return((TResponse)res);
}
} catch (IOException ex) {
if (!mark)
{
_env.Warning($"! {ex.Message} for '{req}'. Retrying {endpoint}");
continue;
}
if (_outages[i] > now)
{
_env.Warning($"! {ex.Message} for '{req}'. {endpoint} already DOWN");
}
else
{
_env.Warning($"! {ex.Message} for '{req}'. {endpoint} DOWN");
_outages[i] = now + _downtime;
}
}
}
// we've exhausted all gateways.
throw new IOException("No gateways active");
}
async Task ProjectionThread()
{
// TODO: deduplication
while (!_env.Token.IsCancellationRequested)
{
try {
var position = _store.GetCounter();
var events = await _client.Read(position, int.MaxValue);
if (events.Count > 0)
{
//_env.Debug($"Projecting {events.Count} events");
foreach (var e in events)
{
_proj.Dispatch(e);
}
position += events.Count;
_store.SetCounter(position);
}
await _env.Delay(100.Ms());
} catch (TaskCanceledException) {
// nothing
return;
} catch (Exception ex) {
_env.Warning($"Projection error: {ex.Message}");
}
}
}
