private void Start(CancellationToken ct)
{
if (ct.IsCancellationRequested)
{
logger.Warn("Cancelled before start.");
return;
}
foreach (var person in this.model.Nodes.OfType <Person>())
{
var pm = new PartialMatch(person, framework, model);
pm.MatchFound += ReportMatchFound;
pm.MatchNotFound += UnsubscribeFromMatcher;
pm.StartAsync();
pm.Wait();
switch (pm.State)
{
case PartialMatchState.MatchFound:
return;
case PartialMatchState.Pending:
this.matchers.Add(pm);
continue;
}
ct.ThrowIfCancellationRequested();
}
OnDone(new IPattern[0]);
}
private void UnsubscribeFromMatcher(PartialMatch sender)
{
sender.MatchFound -= ReportMatchFound;
sender.MatchNotFound -= UnsubscribeFromMatcher;
lock (this)
{
this.matchers.Remove(sender);
}
}
private void ReportMatchFound(PartialMatch sender, Pattern match)
{
UnsubscribeFromMatcher(sender);
OnDone(new IPattern[] { match });
}