public void AddSubscriber(Subscriber sub)
{
subscribers.Add(sub);
if (!hasSubscribers)
{
// Reset some variables so we can start fresh
bytesReceived = 0;
expectedFragment = 0;
//
receiver.GetNewBytesEvent().AddObserver(this);
receiver.Open();
hasSubscribers = true;
SetupTransportThread();
}
}
public void SubscriberNewData(Subscriber sender, OPSObject data)
{
if (!(data is ParticipantInfoData)) return;
ParticipantInfoData partInfo = (ParticipantInfoData)data;
// Is it on our domain?
if (partInfo.domain.Equals(participant.domainID)) {
foreach (TopicInfoData tid in partInfo.subscribeTopics)
{
// We are only interrested in topics with UDP as transport
if ( (tid.transport.Equals(Topic.TRANSPORT_UDP)) && (participant.HasPublisherOn(tid.name)) )
{
udpSendDataHandler.AddSink(tid.name, partInfo.ip, partInfo.mc_udp_port);
}
}
}
}
public void RemoveSubscriber(Subscriber subscriber)
{
subscribers.Remove(subscriber);
}
public void AddSubscriber(Subscriber subscriber)
{
subscribers.Add(subscriber);
}
///LA TODO Protection ?? What if several subscribers at the same time
/// Not needed since all calls go through the participant which is synched
public ISendDataHandler GetSendDataHandler(Topic t, Participant participant)
{
// In the case that we use the same port for several topics, we need to find the sender for the transport::address::port used
string key = t.GetTransport() + "::" + t.GetDomainAddress() + "::" + t.GetPort();
if (SendDataHandlers.ContainsKey(key))
{
return SendDataHandlers[key];
}
try
{
// Get the local interface, doing a translation from subnet if necessary
string localIF = Domain.DoSubnetTranslation(participant.getDomain().GetLocalInterface());
ISendDataHandler sender = null;
if (t.GetTransport().Equals(Topic.TRANSPORT_MC))
{
sender = new McSendDataHandler(t, localIF);
}
else if (t.GetTransport().Equals(Topic.TRANSPORT_TCP))
{
sender = new TcpSendDataHandler(t, localIF);
}
if (sender != null)
{
SendDataHandlers.Add(key, sender);
return sender;
}
// We don't want to add the udp handler to the handler list, so handle this last
if (t.GetTransport().Equals(Topic.TRANSPORT_UDP))
{
if (udpSendDataHandler == null)
{
// We have only one sender for all topics, so use the domain value for buffer size
udpSendDataHandler = new McUdpSendDataHandler(
participant.getDomain().GetOutSocketBufferSize(),
localIF);
// Setup a listener on the participant info data published by participants on our domain.
// We use the information for topics with UDP as transport, to know the destination for UDP sends
// ie. we extract ip and port from the information and add it to our McUdpSendDataHandler
partInfoListener = new ParticipantInfoDataListener(participant, udpSendDataHandler);
partInfoSub = new Subscriber(participant.CreateParticipantInfoTopic());
partInfoSub.newDataDefault += new NewDataDefaultEventHandler(partInfoListener.SubscriberNewData);
partInfoSub.Start();
}
return udpSendDataHandler;
}
throw new CommException("No such Transport " + t.GetTransport());
}
catch (System.IO.IOException ex)
{
throw new CommException("Error creating SendDataHandler. IOException -->" + ex.Message);
}
}
public bool RemoveSubscriber(Subscriber sub)
{
bool result = subscribers.Remove(sub);
if (subscribers.Count == 0)
{
receiver.GetNewBytesEvent().DeleteObserver(this);
hasSubscribers = false;
receiver.Close();
}
return result;
}