public PropagatedUnsubscribeMessage(UnsubscribeMessage msg, string site)
: base(msg, site)
{
}
public void unsubscribe(string topic)
{
lock (thisLock)
{
if (!_subscribedTopics.Contains(topic))
{
// do nothing or throw exception?
return;
}
_subscribedTopics.Remove(topic);
// TODO LOG
// TODO make all calls assyncs
UnsubscribeMessage msg = new UnsubscribeMessage() { sub = this, seqnum = _seqnum, topic = topic, uri = getURI() };
log(string.Format("Unsubscribe. '{0}'", msg));
_broker.unsubscribe(msg);
_seqnum += 1;
}
}
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 unsubscribe(UnsubscribeMessage msg)
{
string origin_site = msg.interested_site;
int en = getEventnum();
//We should only propagate the unsubscriveMessage if there is no more sites
//or subscribers that subscribe it
if (origin_site == null)
{
lock (_topicSubscribers)
{
if (_topicSubscribers.ContainsKey(msg.topic))
{
if (_topicSubscribers[msg.topic].Contains(msg.uri))
{
_topicSubscribers[msg.topic].Remove(msg.uri);
}
else
{
//discart duplicated message
return;
}
if (_topicSubscribers[msg.topic].Count == 0)
{
_topicSubscribers.Remove(msg.topic);
}
}
else
{
//If you unsubscribe something you are not subscribed does not make sense propagate the message
return;
}
}
}
else
{
lock (_topicSites)
{
if (_topicSites.ContainsKey(msg.topic))
{
if (_topicSites[msg.topic].Contains(msg.interested_site))
{
_topicSites[msg.topic].Remove(msg.interested_site);
}
else
{
//discart duplicated message
return;
}
if (_topicSites[msg.topic].Count == 0)
{
_topicSites.Remove(msg.topic);
}
}
else
{
//If you unsubscribe something you are not subscribed does not make sense propagate the message
return;
}
}
}
//Doon't print discarted msg
if (origin_site == null)
{
log(en, "[Unsubscribe] received" + msg.ToString());
}
else
{
log(en, "[Propagate unsubscribe] received" + msg.ToString());
}
msg.interested_site = _site;
// propagate subscribe to parent, taking advantage of tree strucure
lock (_parentSiteLock)
{
if (_parentSite != null)
{
if (origin_site == null || _parentSite.name != origin_site)
{
lock (_siteToPropagatedSub)
{
if (_siteToPropagatedSub.ContainsKey(_parentSite.name))
{
var num = _siteToPropagatedSub[_parentSite.name][msg.topic];
num--;
_siteToPropagatedSub[_parentSite.name][msg.topic] = num;
if (_siteToPropagatedSub[_parentSite.name][msg.topic] == 0)
{
_siteToPropagatedSub[_parentSite.name].Remove(msg.topic);
}
//NO More interested sites in this topic can propagate to parent
if (!_siteToPropagatedSub[_parentSite.name].ContainsKey(msg.topic))
{
log(en, string.Format("[Unsubscribe] Sending {0} to parent site {1}", msg, _parentSite.name));
foreach (var b in _parentSite.brokers)
{
UnsubscribeDelegate sd = new UnsubscribeDelegate(b.unsubscribe);
sd.BeginInvoke(msg, null, null);
}
}
}
}
}
}
}
lock (_childSites)
{
foreach (var s in _childSites)
{
lock (s)
{
if (origin_site == null || s.name != origin_site)
{
lock (_siteToPropagatedSub)
{
if (_siteToPropagatedSub.ContainsKey(s.name))
{
var num = _siteToPropagatedSub[s.name][msg.topic];
num--;
_siteToPropagatedSub[s.name][msg.topic] = num;
if (_siteToPropagatedSub[s.name][msg.topic] == 0)
{
_siteToPropagatedSub[s.name].Remove(msg.topic);
}
//NO More interested sites in this topic can propagate to child
if (!_siteToPropagatedSub[s.name].ContainsKey(msg.topic))
{
log(en, string.Format("[Unsubscribe] Sending {0} to site {1}", msg, s.name));
foreach (var b in s.brokers)
{
UnsubscribeDelegate sd = new UnsubscribeDelegate(b.unsubscribe);
sd.BeginInvoke(msg, null, null);
}
}
}
}
}
}
}
}
}
