public CoalesceHandler(Func <TA, TA, TA> f, EventSink <TA> @out)
{
this.f = f;
this.@out = @out;
Run = (trans1, a) =>
{
if (accumValid)
{
accum = f(accum, a);
}
else
{
CoalesceHandler <TA> thiz = this;
trans1.Prioritized(
@out.Node,
new Handler <Transaction>
{
Run = trans2 =>
{
@out.Send(trans2, thiz.accum);
thiz.accumValid = false;
thiz.accum = default(TA);
}
});
accum = a;
accumValid = true;
}
};
}
Event <TA> Coalesce(Transaction trans1, Func <TA, TA, TA> f)
{
Event <TA> ev = this;
var @out = new EventSink <TA>
{
SampleNow = () =>
{
object[] oi = ev.SampleNow();
if (oi != null)
{
var o = (TA)oi[0];
for (int i = 1; i < oi.Length; i++)
{
o = f(o, (TA)oi[i]);
}
return(new object[] { o });
}
return(null);
}
};
TransactionHandler <TA> h = new CoalesceHandler <TA>(f, @out);
Listener l = Listen(@out.Node, trans1, h, false);
return(@out.AddCleanup(l));
}
public StreamSink(Func <T, T, T> coalesce)
{
this.coalescer = CoalesceHandler.CreateSafe(coalesce, this);
}