public HostingShutdown(
ApplicationShutdown appShutdown,
IServiceBeacon serviceBeacon,
IServiceLocator serviceLocator,
IVostokApplicationIdentity identity,
IMetricContext instanceMetrics,
ILog log,
CancellationToken token,
TimeSpan totalTimeout,
TimeSpan beaconTimeout,
bool beaconWaitEnabled,
bool sendAnnotation)
{
this.appShutdown = appShutdown;
this.serviceBeacon = serviceBeacon;
this.serviceLocator = serviceLocator;
this.identity = identity;
this.instanceMetrics = instanceMetrics;
this.log = log.ForContext <HostingShutdown>();
this.totalTimeout = totalTimeout;
this.beaconTimeout = beaconTimeout;
this.beaconWaitEnabled = beaconWaitEnabled;
this.sendAnnotation = sendAnnotation;
hostShutdownBudget = TimeBudget.CreateNew(totalTimeout);
tokenRegistration = token.Register(OnHostShutdownTriggered);
}
public static (HostingShutdown hosting, ApplicationShutdown application) Create(
IServiceBeacon serviceBeacon,
IServiceLocator serviceLocator,
IVostokApplicationIdentity identity,
IMetricContext instanceMetrics,
ILog log,
int?port,
IReadOnlyList <CancellationToken> tokens,
TimeSpan totalTimeout,
TimeSpan beaconTimeout,
bool beaconWaitEnabled,
bool sendAnnotation)
{
var hasRealBeacon = serviceBeacon is ServiceBeacon;
var hasRealLocator = serviceLocator is ServiceLocator;
// (iloktionov): No point in waiting for beacon deregistration for apps without external port or when SD is disabled.
beaconWaitEnabled &= port.HasValue && hasRealBeacon && hasRealLocator;
// (iloktionov): No point in reducing app shutdown timeout right from the start when SD is disabled.
beaconTimeout = hasRealBeacon ? TimeSpanArithmetics.Min(beaconTimeout, totalTimeout.Divide(3)) : TimeSpan.Zero;
// (iloktionov): Artificially reduce initial app shutdown timeout by beacon shutdown timeout so that it's value doesn't drop abruptly on shutdown.
var applicationShutdown = new ApplicationShutdown(log, totalTimeout - beaconTimeout);
var hostingToken = tokens.Any() ? CancellationTokenSource.CreateLinkedTokenSource(tokens.ToArray()).Token : default;
var hostingShutdown = new HostingShutdown(
applicationShutdown,
serviceBeacon,
serviceLocator,
identity,
instanceMetrics,
log,
hostingToken,
totalTimeout,
beaconTimeout,
beaconWaitEnabled,
sendAnnotation);
return(hostingShutdown, applicationShutdown);
}