void ITimerService.Register(string id, TimeSpan due, TimeSpan period, Func <Task> callback)
{
timers.Add(id, registry.RegisterTimer(grain, async s =>
{
SetExecuting();
await callback();
},
null, due, period));
}
public Task ScheduleDelayedPing(IGenericPingSelf <T> target, T t, TimeSpan delay)
{
_timerRegistry.RegisterTimer(
GrainContext,
o =>
{
this.logger.LogDebug("***Timer fired for pinging {0}***", target.GetPrimaryKey());
return(target.Ping(t));
},
null,
delay,
TimeSpan.FromMilliseconds(-1));
return(Task.CompletedTask);
}
/// <inheritdoc/>
public override Task Initialize(IStreamQueueMapper queueMapper)
{
if (queueMapper == null)
{
throw new ArgumentNullException("queueMapper");
}
this.allQueues = new ReadOnlyCollection <QueueId>(queueMapper.GetAllQueues().ToList());
if (this.allQueues.Count == 0)
{
return(Task.CompletedTask);
}
this.leaseProvider = this.serviceProvider.GetRequiredService(options.LeaseProviderType) as ILeaseProvider;
NotifyAfterStart().Ignore();
//make lease renew frequency to be every half of lease time, to avoid renew failing due to timing issues, race condition or clock difference.
ITimerRegistry timerRegistry = this.serviceProvider.GetRequiredService <ITimerRegistry>();
this.renewLeaseTimer = timerRegistry.RegisterTimer(null, this.MaintainAndBalanceQueues, null, this.options.SiloMaturityPeriod, this.options.LeaseLength.Divide(2));
//try to acquire maximum leases every leaseLength
this.tryAcquireMaximumLeaseTimer = timerRegistry.RegisterTimer(null, this.AcquireLeaseToMeetMaxResponsibility, null, this.options.SiloMaturityPeriod, this.options.SiloMaturityPeriod);
//Selector default to round robin selector now, but we can make a further change to make selector configurable if needed. Selector algorithm could
//be affecting queue balancing stablization time in cluster initializing and auto-scaling
this.queueSelector = new RoundRobinSelector <QueueId>(this.allQueues);
return(MaintainAndBalanceQueues(null));
}
public override Task OnActivateAsync()
{
timerRegistry.RegisterTimer(this, TickExpirationPolicy, null, TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(1));
}