bool IRemoteDispatcher.DispatchRemoteMsg(Topic topic, object msg)
{
var agents = _rrepo.GetAgents();
if (agents.IsEmpty())
return false;
var json = _json.MsgToJson(msg);
var hasListeners = false;
foreach (var agent in agents)
{
bool msgShouldBeSent = msg_shoould_be_sent(topic, agent, msg);
if (msgShouldBeSent == false)
{
Interlocked.Increment(ref _counters.MsgsFiltered);
continue;
}
hasListeners = true;
dispatch_to_remote(agent.AgentUri, topic, json);
Interlocked.Increment(ref _counters.MsgsDispatched);
}
return hasListeners;
}
bool ILocalDispatcher.DispatchLocalMsg(Topic topic, object msg)
{
int snapshotId;
var handlers = _lrepo.GetHandlers(topic.Guid, out snapshotId);
var hasListeners = dispatch_to_handlers(msg, handlers);
Interlocked.Increment(ref _counters.LocalMsgs);
if (hasListeners)
Interlocked.Increment(ref _counters.LocalMsgsDispatched);
return hasListeners;
}
object IJsonEngine.MsgFromJson(Topic topic, string json)
{
var type = topic.Type;
try
{
return
JsonConvert.DeserializeObject(json, type);
}
catch (Exception ex)
{
_log.Warn(ex, "Failed to parse type '{0}' of topic '{1}' from {2}", type.Name, topic.Name, json);
throw;
}
}
private bool msg_shoould_be_sent(Topic topic, RemoteAgent agent, object msg)
{
var topicFilter = get_topic_filter(topic.Guid, agent);
if (topicFilter == null)
return true;
if (topicFilter.Filters.IsEmpty())
return false; // topic has no listeners on target
if (topicFilter.FilterThrows)
return true; // there is a local filter but it throws (remote will recalculate filter)
try
{
var filterIsMatched = filter_is_matched(topicFilter.Filters, msg);
if (filterIsMatched)
return true;
}
catch (Exception ex)
{
topicFilter.FilterThrows = true;
_log.Warn(ex, "Failed to invoke remote filter for topic {0}", topic.ToJson());
}
// no matched filters
return false;
}
private void dispatch_to_remote(string agent, Topic topic, string json)
{
var msg = new comm.PublishMsg {
Topic = topic,
TopicName = topic.Name,
TopicGuid = topic.Guid,
Json = json,
FromAgent = _myself
};
_messenger.SendPublishMsg(agent, msg);
}