protected virtual void InvokeCallback(object state)
{
try
{
ISchedulerItem item = (ISchedulerItem)state;
item.Invoke();
}
catch (Exception x)
{
Logger.Error(x, "Error while executing schedule item.");
}
}
protected virtual void ExecuteItemCallback(object state, bool timedOut)
{
try
{
ISchedulerItem item;
bool execute;
lock (schedulerQueue)
{
executeHandle.Unregister(executeEvent);
executeEvent.Close();
executeHandle = null;
item = schedulerQueue.Top();
if (item == null)
{
return;
}
DateTime now = DateTime.UtcNow;
execute = now >= item.NextStart.ToUniversalTime();
if (execute)
{
item.Increase();
}
ISchedulerItem top = schedulerQueue.Top();
if (top != null)
{
TimeSpan interval = new TimeSpan(0, 0, 1);
DateTime next = top.NextStart.ToUniversalTime();
if (next > now)
{
interval = next - now;
Logger.Debug("Next event at {0:u}.", top.NextStart.ToLocalTime());
}
executeEvent = new AutoResetEvent(false);
executeHandle = ThreadPool.RegisterWaitForSingleObject(executeEvent, ExecuteItemCallback, null, interval, true);
}
}
if (execute)
{
Logger.Debug("Starting scheduled item '{0}'.", item.Name);
ThreadPool.QueueUserWorkItem(InvokeCallback, item);
}
}
catch (Exception x)
{
Logger.Error(x, "Error while processing schedule. Scheduler is halting.");
}
}
public ScheduleItemStatus(ISchedulerItem item)
{
Name = item.Name;
NextStart = item.NextStart;
LastStart = item.LastStart;
}