public void Handle(DisconnectedFromCluster req)
{
if (FromOurTopology(req) == false)
{
_log.Info("Got a disconnection notification message outside my cluster topology (id: {0}), ignoring", req.ClusterTopologyId);
return;
}
if (req.Term < Engine.PersistentState.CurrentTerm)
{
_log.Info("Got disconnection notification from an older term, ignoring");
return;
}
if (req.From != Engine.CurrentLeader)
{
_log.Info("Got disconnection notification from {0}, who isn't the current leader, ignoring.",
req.From);
return;
}
_log.Warn("Got disconnection notification from the leader, clearing topology and moving to idle follower state");
var tcc = new TopologyChangeCommand
{
Requested = new Topology(req.ClusterTopologyId)
};
Engine.PersistentState.SetCurrentTopology(tcc.Requested, 0L);
Engine.StartTopologyChange(tcc);
Engine.CommitTopologyChange(tcc);
Engine.SetState(RaftEngineState.Follower);
}
public void Send(NodeConnectionInfo dest, DisconnectedFromCluster req)
{
_sender.Send(dest, req);
}
public void Send(NodeConnectionInfo dest, DisconnectedFromCluster req)
{
HttpClient client;
using (GetConnection(dest, out client))
{
LogStatus("disconnect " + dest, async () =>
{
var message = await client.GetAsync(string.Format("raft/disconnectFromCluster?term={0}&from={1}&clusterTopologyId={2}", req.Term, req.From, req.ClusterTopologyId));
var reply = await message.Content.ReadAsStringAsync();
if (message.IsSuccessStatusCode == false)
{
_log.Warn("Error sending disconnecton notification to {0}. Status: {1}\r\n{2}", dest.Name, message.StatusCode, message, reply);
return;
}
SendToSelf(new NothingToDo());
});
}
}