public void unsubscribe(UnsubscribeMessage msg)
{
log(string.Format("[Unsubscribe] Received event '{0}'", msg));
//if (isDuplicate(msg)) return;
// should we have FIFO order here?
lock (_topicSubscribers)
{
if (_topicSubscribers.ContainsKey(msg.topic))
{
_topicSubscribers[msg.topic].Remove(msg.uri);
if (_topicSubscribers[msg.topic].Count == 0)
{
_topicSubscribers.Remove(msg.topic);
}
}
}
PropagatedUnsubscribeMessage pmsg = new PropagatedUnsubscribeMessage(msg, _site);
// propagate unsubscribe only to parent, taking advantage of tree strucure
lock (_parentSiteLock)
{
if (_parentSite != null)
{
foreach (Broker b in _parentSite.brokers)
{
log(string.Format("[Unsubscribe] senting '{0}' to parent site '{1}'", pmsg, _parentSite.name));
// TODO assyncronous
b.propagateUnsubscribe(pmsg);
}
}
}
}
public void propagateUnsubscribe(PropagatedUnsubscribeMessage msg)
{
log(string.Format("[propagateUnsubscribe] Received event '{0}'", msg));
// TODO deal with duplicate messages. using which seqnum?...
lock (_topicSites)
{
if (_topicSites.ContainsKey(msg.topic))
{
_topicSites[msg.topic].Remove(msg.interested_site);
if (_topicSites[msg.topic].Count == 0)
{
_topicSites.Remove(msg.topic);
}
}
}
msg.interested_site = _site;
lock (_parentSiteLock)
{
if (_parentSite != null)
{
foreach (var b in _parentSite.brokers)
{
log(string.Format("[subscribe] senting '{0}' to parent site '{1}'", msg, _parentSite.name));
//TODO assync
b.propagateSubscribe(msg);
}
}
}
}