public void Leave(ZrePeer peer)
{
ZrePeer tmp;
if (_peers.TryRemove(peer.Identity, out tmp))
{
peer.Status += 1;
}
}
private ZreGroup JoinPeerGroup(ZrePeer peer, string groupName)
{
var group = RequirePeerGroup(groupName);
group.Join(peer);
// Now tell the caller about the peer joined group
_pipe
.SendMoreFrame("JOIN")
.SendMoreFrame(peer.Identity.ToString())
.SendMoreFrame(peer.Name)
.SendFrame(groupName);
if (_verbose)
{
Trace.WriteLine(
string.Format(
"({0}) JOIN name={1} group={2}",
_name,
peer.Name,
groupName));
}
return group;
}
private ZrePeer RequirePeer(Guid identity, string endpoint)
{
ZrePeer peer;
if (_peers.TryGetValue(identity, out peer))
{
return peer;
}
// Purge any previous peer on same endpoint
PurgePeer(endpoint);
peer = new ZrePeer(_context, identity);
_peers.TryAdd(identity, peer);
peer.Origin = _name;
peer.Verbose = _verbose;
peer.Connect(_identity, endpoint);
// Handshake discovery by sending HELLO as first message
var groups = _ownGroups.Keys.ToArray();
var headers = new ConcurrentDictionary<string, string>(_headers);
var msg = new ZreMessage(ZreMessageType.Hello);
msg.Endpoint = _endpoint;
msg.Groups.UnionWith(groups);
msg.Status = _status;
msg.Name = _name;
msg.Headers = headers;
peer.Send(msg);
return peer;
}
private void RemovePeer(ZrePeer peer)
{
// Tell the calling application the peer has gone
_pipe
.SendMoreFrame("EXIT")
.SendMoreFrame(peer.Identity.ToString())
.SendFrame(peer.Name);
if (_verbose)
{
Trace.WriteLine(
string.Format(
"({0}) EXIT name={1} endpoint={2}",
_name,
peer.Name,
peer.Endpoint));
}
// Remove peer from any groups we've got it in
foreach (var peerGroup in _peerGroups)
{
peerGroup.Value.Leave(peer);
}
// To destroy peer, we remove from peers hash table
_peers.TryRemove(peer.Identity, out peer);
}
private ZreGroup LeavePeerGroup(ZrePeer peer, string groupName)
{
var group = RequirePeerGroup(groupName);
@group.Leave(peer);
// Now tell the caller about the peer left group
_pipe
.SendMoreFrame("LEAVE")
.SendMoreFrame(peer.Identity.ToString())
.SendMoreFrame(peer.Name)
.SendFrame(groupName);
if (_verbose)
{
Trace.WriteLine(
string.Format(
"({0}) LEAVE name={1} group={2}",
_name,
peer.Name,
groupName));
}
return group;
}
public void Join(ZrePeer peer)
{
peer = _peers.GetOrAdd(peer.Identity, guid => peer);
peer.Status += 1;
}