Issue 508 in tradelink: barlisttracker throws an exception when accessing a bar from GotNewBar

[trad...@googlecode.com]

Status: Accepted
Owner: frantajosh
Labels: Type-Defect

New issue 508 by frantajosh: barlisttracker throws an exception when
accessing a bar from GotNewBar
http://code.google.com/p/tradelink/issues/detail?id=508

public class BLTExcept : ResponseTemplate
{
BarListTracker _blt = new BarListTracker(new BarInterval[] {
BarInterval.Hour });

public Tops()
{
Indicators = new string[] { "Time", "Price", "dx", "d2x" };
}

void _blt_GotNewBar(string symbol, int interval)
{
// this is throwing an exception, should never happen
Bar bar = _blt[symbol, interval].RecentBar;
}

public override void GotTick(Tick k)
{
_blt.newTick(k);

}

public override void Reset()
{
_blt = new BarListTracker(new BarInterval[] {
BarInterval.Hour});
_blt.GotNewBar += new SymBarIntervalDelegate(_blt_GotNewBar);
}
}

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[trad...@googlecode.com]

Comment #1 on issue 508 by frantajosh: barlisttracker throws an exception

when accessing a bar from GotNewBar
http://code.google.com/p/tradelink/issues/detail?id=508

this has partly to do with requesting a barlist from tracker which already
exists,
see line 92 :

public BarList this[string sym, int interval]
{
get
{
BarListImpl bl;
if (_bdict.TryGetValue(sym, out bl))
return (BarList)bl;
bl = new BarListImpl(sym, _requested, _reqtype);
bl.DefaultCustomInterval = interval;
bl.GotNewBar += new SymBarIntervalDelegate(bl_GotNewBar);
_bdict.Add(sym, bl);
return bl;
}
}

this :

if (_bdict.TryGetValue(sym, out bl))
return (BarList)bl;

should instead be :

if (_bdict.TryGet())
{
bl.DefaultCustomInterval = interval
}

it's defaulting to 300 which if it isn't present, is messing up several
things.