public async Task GetEvents_RemovesExpiredItems()
{
var window = new SlidingWindow <MyItem>(TimeSpan.FromSeconds(1));
for (int i = 0; i < 5; i++)
{
window.AddEvent(new MyItem {
Data = i
});
await Task.Delay(100);
}
var evts = window.GetEvents().ToArray();
Assert.Equal(5, evts.Length);
for (int i = 0; i < 5; i++)
{
Assert.Equal(i, evts[i].Data);
}
// now let the items expire
await Task.Delay(1000);
// add a new event that shouldn't be expired
var evt = new MyItem {
Data = 7
};
window.AddEvent(evt);
evts = window.GetEvents().ToArray();
Assert.Equal(1, evts.Length);
Assert.Same(evt, evts[0]);
}
public async Task GetEvents_RemovesExpiredItems()
{
var expiry = TimeSpan.FromSeconds(1);
var window = new SlidingWindow <MyItem>(expiry);
var initialEventCount = 5;
var insertionTimestamps = new DateTime[initialEventCount];
for (int i = 0; i < initialEventCount; i++)
{
window.AddEvent(new MyItem {
Data = i
});
insertionTimestamps[i] = DateTime.Now;
await Task.Delay(100);
}
var evts = window.GetEvents().ToArray();
// How many items have expired? We're at the mercy of the task scheduler here.
// In theory we should have only waited 5 * 100 = 500ms and have zero expired items but we might have waited longer.
var insertionCompleteTimestamp = DateTime.Now;
var expiredCount = insertionTimestamps.Count(t => (insertionCompleteTimestamp - t) > expiry);
var expectedCount = initialEventCount - expiredCount;
// Check the total count and each of the non expired items
Assert.Equal(expectedCount, evts.Length);
for (int i = 0; i < expectedCount; i++)
{
Assert.Equal(i + expiredCount, evts[i].Data);
}
// now let the items expire
await Task.Delay(expiry);
// add a new event that shouldn't be expired
var evt = new MyItem {
Data = 7
};
window.AddEvent(evt);
evts = window.GetEvents().ToArray();
Assert.Equal(1, evts.Length);
Assert.Same(evt, evts[0]);
}
private bool ShutdownHostIfUnhealthy()
{
if (ShouldMonitorHostHealth && _healthCheckWindow.GetEvents().Count(isHealthy => !isHealthy) > _healthMonitorOptions.Value.HealthCheckThreshold)
{
// if the number of times the host has been unhealthy in
// the current time window exceeds the threshold, recover by
// initiating shutdown
_logger.UnhealthyCountExceeded(_healthMonitorOptions.Value.HealthCheckThreshold, _healthMonitorOptions.Value.HealthCheckWindow);
_applicationLifetime.StopApplication();
return(true);
}
return(false);
}
private bool ShutdownHostIfUnhealthy()
{
if (ShouldMonitorHostHealth && _healthCheckWindow.GetEvents().Count(isHealthy => !isHealthy) > _healthMonitorOptions.Value.HealthCheckThreshold)
{
// if the number of times the host has been unhealthy in
// the current time window exceeds the threshold, recover by
// initiating shutdown
_logger.UnhealthyCountExceeded(_healthMonitorOptions.Value.HealthCheckThreshold, _healthMonitorOptions.Value.HealthCheckWindow);
var environment = _rootServiceProvider.GetService <IScriptJobHostEnvironment>();
environment.Shutdown();
return(true);
}
return(false);
}
private bool ShutdownHostIfUnhealthy()
{
if (ShouldMonitorHostHealth && _healthCheckWindow.GetEvents().Where(isHealthy => !isHealthy).Count() > _healthMonitorOptions.Value.HealthCheckThreshold)
{
// if the number of times the host has been unhealthy in
// the current time window exceeds the threshold, recover by
// initiating shutdown
var message = $"Host unhealthy count exceeds the threshold of {_healthMonitorOptions.Value.HealthCheckThreshold} for time window {_healthMonitorOptions.Value.HealthCheckWindow}. Initiating shutdown.";
_logger.LogError(0, message);
var environment = _rootServiceProvider.GetService <IScriptJobHostEnvironment>();
environment.Shutdown();
return(true);
}
return(false);
}
