///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);
}
}
/// Protection is not needed since all calls go through the participant which is synched
public ReceiveDataHandler GetReceiveDataHandler(Topic top, Participant participant)
{
// In the case that we use the same port for several topics, we need to find the receiver for the transport::address::port used
string key = MakeKey(top);
if (ReceiveDataHandlers.ContainsKey(key))
{
ReceiveDataHandler rdh = ReceiveDataHandlers[key];
// Check if any of the topics have a sample size larger than MAX_SEGMENT_SIZE
// This will lead to a problem when using the same port, if samples becomes > MAX_SEGMENT_SIZE
if ((rdh.GetSampleMaxSize() > Globals.MAX_SEGMENT_SIZE) || (top.GetSampleMaxSize() > Globals.MAX_SEGMENT_SIZE))
{
if (top.GetTransport().Equals(Topic.TRANSPORT_UDP))
{
Logger.ExceptionLogger.LogMessage("Warning: UDP transport is used with Topics with 'sampleMaxSize' > " + Globals.MAX_SEGMENT_SIZE);
}
else
{
Logger.ExceptionLogger.LogMessage("Warning: Same port (" + top.GetPort() + ") is used with Topics with 'sampleMaxSize' > " + Globals.MAX_SEGMENT_SIZE);
}
}
return(rdh);
}
// Get the local interface, doing a translation from subnet if necessary
string localIF = Domain.DoSubnetTranslation(participant.getDomain().GetLocalInterface());
// Didn't exist, create one if transport is known
if ((top.GetTransport().Equals(Topic.TRANSPORT_MC)) || (top.GetTransport().Equals(Topic.TRANSPORT_TCP)))
{
ReceiveDataHandlers.Add(key,
new ReceiveDataHandler(top, participant, ReceiverFactory.CreateReceiver(top, localIF)));
return(ReceiveDataHandlers[key]);
}
else if (top.GetTransport().Equals(Topic.TRANSPORT_UDP))
{
IReceiver rec = ReceiverFactory.CreateReceiver(top, localIF);
ReceiveDataHandlers.Add(key, new ReceiveDataHandler(top, participant, rec));
participant.SetUdpTransportInfo(((UdpReceiver)rec).IP, ((UdpReceiver)rec).Port);
return(ReceiveDataHandlers[key]);
}
return(null);
}