public async Task Queues_for_delayed_execution()
{
var host = CreateBackgroundTaskHost(o =>
{
o.DelayTasks = true;
o.Concurrency = 1;
o.SleepIntervalSeconds = 1;
});
await host.TryScheduleTaskAsync(typeof(StaticCountingHandler), null, o =>
{
o.RunAt =
Store.GetTaskTimestamp() + TimeSpan.FromSeconds(1);
});
Assert.True(StaticCountingHandler.Count == 0,
"handler should not have queued immediately since tasks are delayed");
host.Start(); // <-- starts background thread to poll for tasks
await Task.Delay(2000); // <-- enough time for the next occurrence
Assert.True(StaticCountingHandler.Count > 0,
"handler should have executed since we scheduled it in the future");
Assert.True(StaticCountingHandler.Count == 1,
"handler should have only executed once since it does not repeat");
}
public void Occurrence_is_in_UTC()
{
var task = new BackgroundTask
{
RunAt = _store.GetTaskTimestamp(), Expression = CronTemplates.Daily(1, 3, 30)
};
var next = task.NextOccurrence;
Assert.NotNull(next);
Assert.True(next.Value.Hour == 3);
Assert.Equal(next.Value.Hour, next.Value.UtcDateTime.Hour);
}
private BackgroundTask CreateNewTask()
{
var task = new BackgroundTask();
var options = new BackgroundTaskOptions();
// these values are required and must be set by implementation
task.Handler = "{}";
task.MaximumAttempts = options.MaximumAttempts;
task.MaximumRuntime = TimeSpan.FromSeconds(options.MaximumRuntimeSeconds);
task.DeleteOnError = options.DeleteOnError;
task.DeleteOnFailure = options.DeleteOnFailure;
task.DeleteOnSuccess = options.DeleteOnSuccess;
task.RunAt = Store.GetTaskTimestamp();
return(task);
}
public bool IsRunningOvertime(IBackgroundTaskStore store)
{
if (!LockedAt.HasValue)
{
return(false);
}
if (!MaximumRuntime.HasValue)
{
return(false);
}
var now = store.GetTaskTimestamp();
var elapsed = now - LockedAt.Value;
// overtime = 125% of maximum runtime
var overage = TimeSpan.FromTicks((long)(MaximumRuntime.Value.Ticks * 0.25f));
var overtime = MaximumRuntime.Value + overage;
return(elapsed >= overtime);
}