MulticastSession*
MulticastTransport::start_session(const MulticastDataLink_rch& link,
MulticastPeer remote_peer, bool active)
{
if (link.is_nil()) {
ACE_ERROR_RETURN((LM_ERROR,
ACE_TEXT("(%P|%t) ERROR: ")
ACE_TEXT("MulticastTransport[%C]::start_session: ")
ACE_TEXT("link is nil\n"),
this->config_i_->name().c_str()),
0);
}
MulticastSession_rch session = link->find_or_create_session(remote_peer);
if (session.is_nil()) {
ACE_ERROR_RETURN((LM_ERROR,
ACE_TEXT("(%P|%t) ERROR: ")
ACE_TEXT("MulticastTransport[%C]::start_session: ")
ACE_TEXT("failed to create session for remote peer: 0x%x!\n"),
this->config_i_->name().c_str(), remote_peer),
0);
}
if (!session->start(active)) {
ACE_ERROR_RETURN((LM_ERROR,
ACE_TEXT("(%P|%t) ERROR: ")
ACE_TEXT("MulticastTransport[%C]::start_session: ")
ACE_TEXT("failed to start session for remote peer: 0x%x!\n"),
this->config_i_->name().c_str(), remote_peer),
0);
}
return session._retn();
}
DataLink*
MulticastTransport::find_datalink_i(const RepoId& /*local_id*/,
const RepoId& remote_id,
const TransportBLOB& /*remote_data*/,
CORBA::Long /*priority*/,
bool active)
{
// To accommodate the one-to-many nature of multicast reservations,
// a session layer is used to maintain state between unique pairs
// of DomainParticipants over a single DataLink instance. Given
// that TransportImpl instances may only be attached to either
// Subscribers or Publishers within the same DomainParticipant,
// it may be assumed that the local_id always references the same
// participant.
MulticastDataLink_rch link;
if (active && !this->client_link_.is_nil()) {
link = this->client_link_;
}
if (!active && !this->server_link_.is_nil()) {
link = this->server_link_;
}
if (!link.is_nil()) {
MulticastPeer remote_peer = RepoIdConverter(remote_id).participantId();
MulticastSession_rch session = link->find_session(remote_peer);
if (session.is_nil()) {
// From the framework's point-of-view, no DataLink was found.
// This way we will progress to the connect/accept stage for handshaking.
return 0;
}
if (!session->start(active)) {
ACE_ERROR_RETURN((LM_ERROR,
ACE_TEXT("(%P|%t) ERROR: ")
ACE_TEXT("MulticastTransport[%C]::find_datalink_i: ")
ACE_TEXT("failed to start session for remote peer: 0x%x!\n"),
this->config_i_->name().c_str(), remote_peer),
0);
}
VDBG_LVL((LM_DEBUG, "(%P|%t) MulticastTransport[%C]::find_datalink_i "
"started session for remote peer: 0x%x\n",
this->config_i_->name().c_str(), remote_peer), 2);
}
return link._retn();
}
