public void Start()
{
try
{
lock (_syncRoot)
{
if (_pollingThread != null)
{
return;
}
_log.Info("----------------");
_log.Info("Service Starting");
var queries = new QueryLocator(new DapperWrapper()).PrepareQueries();
_settings.Endpoints.ForEach(e => e.SetQueries(queries));
var initialDelaySeconds = _settings.TestMode ? 0 : _settings.PollIntervalSeconds;
var pollingThreadSettings = new PollingThreadSettings
{
Name = "SqlPoller",
// Set to immediate when in TestMode for instant gratification.
InitialPollDelaySeconds = initialDelaySeconds,
PollIntervalSeconds = _settings.PollIntervalSeconds,
PollAction = () => _metricCollector.QueryEndpoints(queries),
AutoResetEvent = new AutoResetEvent(false),
};
_pollingThread = new PollingThread(pollingThreadSettings, _log);
_pollingThread.ExceptionThrown += e => _log.Error("Polling thread exception", e);
_log.Debug("Service Threads Starting...");
if (initialDelaySeconds > 0)
{
_log.InfoFormat("Waiting {0} seconds to begin polling", initialDelaySeconds);
}
_pollingThread.Start();
_log.Debug("Service Threads Started");
}
}
catch (Exception e)
{
_log.Fatal("Failed while attempting to start service");
_log.Warn(e);
throw;
}
}