private void HandleInternalReplication(DatabaseRecord newRecord, List <OutgoingReplicationHandler> instancesToDispose)
{
var newInternalDestinations =
newRecord.Topology?.GetDestinations(_server.NodeTag, Database.Name, newRecord.DeletionInProgress, _clusterTopology, _server.Engine.CurrentState);
var internalConnections = DatabaseTopology.FindChanges(_internalDestinations, newInternalDestinations);
if (internalConnections.RemovedDestiantions.Count > 0)
{
var removed = internalConnections.RemovedDestiantions.Select(r => new InternalReplication
{
NodeTag = _clusterTopology.TryGetNodeTagByUrl(r).NodeTag,
Url = r,
Database = Database.Name
});
DropOutgoingConnections(removed, instancesToDispose);
}
if (internalConnections.AddedDestinations.Count > 0)
{
var added = internalConnections.AddedDestinations.Select(r => new InternalReplication
{
NodeTag = _clusterTopology.TryGetNodeTagByUrl(r).NodeTag,
Url = r,
Database = Database.Name
});
StartOutgoingConnections(added.ToList());
}
_internalDestinations.Clear();
_internalDestinations.AddRange(newInternalDestinations);
}
public List <ReplicationNode> GetDestinations(string myTag, string databaseName, Dictionary <string, DeletionInProgressStatus> deletionInProgress,
ClusterTopology clusterTopology, RachisState state)
{
var list = new List <string>();
var destinations = new List <ReplicationNode>();
if (Promotables.Contains(myTag)) // if we are a promotable we can't have any destinations
{
return(destinations);
}
var nodes = Members.Concat(Rehabs);
foreach (var node in nodes)
{
if (node == myTag) // skip me
{
continue;
}
if (deletionInProgress != null && deletionInProgress.ContainsKey(node))
{
continue;
}
list.Add(clusterTopology.GetUrlFromTag(node));
}
foreach (var promotable in Promotables)
{
if (deletionInProgress != null && deletionInProgress.ContainsKey(promotable))
{
continue;
}
var url = clusterTopology.GetUrlFromTag(promotable);
PredefinedMentors.TryGetValue(promotable, out var mentor);
if (WhoseTaskIsIt(state, new PromotableTask(promotable, url, databaseName, mentor), null) == myTag)
{
list.Add(url);
}
}
// remove nodes that are not in the raft cluster topology
list.RemoveAll(url => clusterTopology.TryGetNodeTagByUrl(url).HasUrl == false);
foreach (var url in list)
{
destinations.Add(new InternalReplication
{
NodeTag = clusterTopology.TryGetNodeTagByUrl(url).NodeTag,
Url = url,
Database = databaseName
});
}
return(destinations);
}
public List <ReplicationNode> GetDestinations(string nodeTag, string databaseName, ClusterTopology clusterTopology, RachisState state)
{
var list = new List <string>();
var destinations = new List <ReplicationNode>();
if (Members.Contains(nodeTag) == false) // if we are not a member we can't have any destinations
{
return(destinations);
}
foreach (var member in Members)
{
if (member == nodeTag) //skip me
{
continue;
}
list.Add(clusterTopology.GetUrlFromTag(member));
}
foreach (var promotable in Promotables.Concat(Rehabs))
{
var url = clusterTopology.GetUrlFromTag(promotable);
PredefinedMentors.TryGetValue(promotable, out var mentor);
if (WhoseTaskIsIt(new PromotableTask(promotable, url, databaseName, mentor), state) == nodeTag)
{
list.Add(url);
}
}
// remove nodes that are not in the raft cluster topology
list.RemoveAll(url => clusterTopology.TryGetNodeTagByUrl(url).HasUrl == false);
foreach (var url in list)
{
destinations.Add(new InternalReplication
{
NodeTag = clusterTopology.TryGetNodeTagByUrl(url).NodeTag,
Url = url,
Database = databaseName
});
}
return(destinations);
}