/**
* Creates a new FuzzyEvent, Schedules it and returns it
* @param todo the method to call
* @param from_now_ms the TimeSpan from now to call the method
* @param latency_ms the acceptable latency for this call in milliseconds
*/
public FuzzyEvent DoAt(System.Action <DateTime> todo, DateTime at,
int latency_ms)
{
DateTime end = at + new TimeSpan(0, 0, 0, 0, latency_ms);
FuzzyEvent new_event = new FuzzyEvent(todo, at, end);
Schedule(new_event);
return(new_event);
}
public void Schedule(FuzzyEvent e)
{
#if BRUNET_SIMULATOR
int delay = (int)(e.End - DateTime.UtcNow).TotalMilliseconds;
SimpleTimer st = new SimpleTimer(FuzzyEventRunner, e, delay, 0);
st.Start();
#else
_incoming_events.Enqueue(e);
#endif
}
protected static void FuzzyEventRunner(object o)
{
FuzzyEvent fe = o as FuzzyEvent;
if (o == null)
{
throw new Exception("o is not a FuzzyEvent!");
}
fe.TryRun(DateTime.UtcNow);
}
/**
* Creates a new FuzzyEvent, Schedules it and returns it
* @param todo the method to call
* @param from_now_ms the TimeSpan from now to call the method in milliseconds
* @param latency_ms the acceptable latency for this call in milliseconds
*/
public FuzzyEvent DoAfter(System.Action <DateTime> todo,
int from_now_ms, int latency_ms)
{
DateTime start = DateTime.UtcNow + new TimeSpan(0, 0, 0, 0, from_now_ms);
DateTime end = start + new TimeSpan(0, 0, 0, 0, latency_ms);
FuzzyEvent new_event = new FuzzyEvent(todo, start, end);
Schedule(new_event);
return(new_event);
}
/**
* There can only safely be one of these threads running
*/
protected void AnnounceThread()
{
Brunet.Util.FuzzyEvent fe = null;
try {
int millisec_timeout = 5000; //log every 5 seconds.
IAction queue_item = null;
bool timedout = false;
if (ProtocolLog.Monitor.Enabled)
{
IAction log_act = new LogAction(_packet_queue);
Action <DateTime> log_todo = delegate(DateTime dt) {
EnqueueAction(log_act);
};
fe = Brunet.Util.FuzzyTimer.Instance.DoEvery(log_todo, millisec_timeout, millisec_timeout / 2);
}
while (1 == _running)
{
queue_item = _packet_queue.Dequeue(millisec_timeout, out timedout);
if (!timedout)
{
_current_action = queue_item;
queue_item.Start();
}
}
}
catch (System.InvalidOperationException x) {
//This is thrown when Dequeue is called on an empty queue
//which happens when the BlockingQueue is closed, which
//happens on Disconnect
if (1 == _running)
{
ProtocolLog.WriteIf(ProtocolLog.Exceptions, String.Format(
"Running in AnnounceThread got Exception: {0}", x));
}
}
catch (Exception x) {
ProtocolLog.WriteIf(ProtocolLog.Exceptions, String.Format(
"ERROR: Exception in AnnounceThread: {0}", x));
}
finally {
//Make sure we stop logging:
if (fe != null)
{
fe.TryCancel();
}
}
ProtocolLog.Write(ProtocolLog.Monitor,
String.Format("Node: {0} leaving AnnounceThread",
this.Address));
}
protected void TimerThread()
{
Heap <FuzzyEvent> events = new Heap <FuzzyEvent>();
List <FuzzyEvent> next_todos = new List <FuzzyEvent>();
Interval <DateTime> next_schedule_int = null;
int wait_interval = -1;
bool run = true;
bool timedout;
while (run)
{
FuzzyEvent fe = _incoming_events.Dequeue(wait_interval, out timedout);
if (!timedout)
{
//We got a new event
if (fe != null)
{
events.Add(fe);
}
else
{
//Got a null event, that means stop:
break;
}
}
DateTime now = DateTime.UtcNow;
/*
* Since we've already been awakened, let's check to see if we can run:
*/
if (next_schedule_int != null)
{
if (next_schedule_int.CompareTo(now) <= 0)
{
//We are safe to go ahead and run:
Interlocked.Exchange(ref _last_run, now.Ticks);
foreach (FuzzyEvent feitem in next_todos)
{
try {
feitem.TryRun(now);
}
catch (Exception x) {
Console.WriteLine(x);
//Something bad happened
}
}
//Now reset and reschedule below:
next_todos.Clear();
next_schedule_int = null;
}
else
{
//It's not yet time to run.
}
}
//Time to schedule the next wait:
Interval <DateTime> overlap;
do
{
if (events.Count > 0)
{
overlap = events.Peek();
if (next_schedule_int != null)
{
//We already have something scheduled:
var new_overlap = next_schedule_int.Intersection(overlap);
if (new_overlap == null)
{
if (overlap.CompareTo(next_schedule_int) <= 0)
{
/*
* If there is no overlap, but next_schedule_int is after,
* overlap, we need to reorder things:
*/
//Put the next_todos back:
var new_next = events.Pop();
foreach (FuzzyEvent fev in next_todos)
{
events.Add(fev);
}
next_todos.Clear();
next_todos.Add(new_next);
next_schedule_int = new_next;
overlap = new_next;
}
else
{
//we'll deal with overlap later:
overlap = null;
}
}
else
{
//There is an overlap
//We can combine the old and new event:
overlap = new_overlap;
next_schedule_int = overlap;
next_todos.Add(events.Pop());
}
}
else
{
//There was nothing scheduled:
next_schedule_int = overlap;
next_todos.Add(events.Pop());
}
}
else
{
overlap = null;
}
} while(overlap != null);
if (next_schedule_int != null)
{
//Wait as long as possible, we may be able to combine later:
TimeSpan to_wait = next_schedule_int.End - now;
wait_interval = (int)to_wait.TotalMilliseconds;
if (wait_interval < 0)
{
//Well, we should be able to go ahead and run, so do it:
wait_interval = 0;
}
}
else
{
//Nothing to do, just wait for the next scheduled operation
wait_interval = -1;
}
}
}
