//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public java.util.Optional<org.neo4j.causalclustering.identity.MemberId> upstreamDatabase() throws org.neo4j.causalclustering.upstream.UpstreamDatabaseSelectionException
public override Optional <MemberId> UpstreamDatabase()
{
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final org.neo4j.causalclustering.discovery.CoreTopology coreTopology = topologyService.localCoreServers();
CoreTopology coreTopology = TopologyService.localCoreServers();
if (coreTopology.Members().Count == 0)
{
throw new UpstreamDatabaseSelectionException("No core servers available");
}
int skippedServers = _random.Next(coreTopology.Members().Count);
return(coreTopology.Members().Keys.Skip(skippedServers).First());
}
private IList <Endpoint> RouteEndpoints(string dbName)
{
CoreTopology filtered = _topologyService.allCoreServers().filterTopologyByDb(dbName);
Stream <CoreServerInfo> filteredCoreMemberInfo = filtered.Members().Values.stream();
return(filteredCoreMemberInfo.map(extractBoltAddress()).map(Endpoint.route).collect(Collectors.toList()));
}
private IList <Endpoint> ReadEndpoints(CoreTopology coreTopology, ReadReplicaTopology rrTopology, Policy policy)
{
//JAVA TO C# CONVERTER TODO TASK: Most Java stream collectors are not converted by Java to C# Converter:
ISet <ServerInfo> possibleReaders = rrTopology.Members().SetOfKeyValuePairs().Select(entry => new ServerInfo(entry.Value.connectors().boltAddress(), entry.Key, entry.Value.groups())).collect(Collectors.toSet());
if (_allowReadsOnFollowers || possibleReaders.Count == 0)
{
ISet <MemberId> validCores = coreTopology.Members().Keys;
try
{
MemberId leader = _leaderLocator.Leader;
//JAVA TO C# CONVERTER TODO TASK: Most Java stream collectors are not converted by Java to C# Converter:
validCores = validCores.Where(memberId => !memberId.Equals(leader)).collect(Collectors.toSet());
}
catch (NoLeaderFoundException)
{
// we might end up using the leader for reading during this ttl, should be fine in general
}
foreach (MemberId validCore in validCores)
{
Optional <CoreServerInfo> coreServerInfo = coreTopology.find(validCore);
coreServerInfo.ifPresent(coreServerInfo1 => possibleReaders.Add(new ServerInfo(coreServerInfo1.connectors().boltAddress(), validCore, coreServerInfo1.groups())));
}
}
ISet <ServerInfo> readers = policy.Apply(possibleReaders);
return(readers.Select(r => Endpoint.read(r.boltAddress())).ToList());
}
public override RawIterator <object[], ProcedureException> Apply(Context ctx, object[] input, ResourceTracker resourceTracker)
{
IDictionary <MemberId, RoleInfo> roleMap = _topologyService.allCoreRoles();
IList <ReadWriteEndPoint> endpoints = new List <ReadWriteEndPoint>();
CoreTopology coreTopology = _topologyService.allCoreServers();
ISet <MemberId> coreMembers = coreTopology.Members().Keys;
foreach (MemberId memberId in coreMembers)
{
Optional <CoreServerInfo> coreServerInfo = coreTopology.find(memberId);
if (coreServerInfo.Present)
{
CoreServerInfo info = coreServerInfo.get();
RoleInfo role = roleMap.getOrDefault(memberId, RoleInfo.UNKNOWN);
endpoints.Add(new ReadWriteEndPoint(info.Connectors(), role, memberId.Uuid, new IList <string> {
info.Groups()
}, info.DatabaseName));
}
else
{
_log.debug("No Address found for " + memberId);
}
}
foreach (KeyValuePair <MemberId, ReadReplicaInfo> readReplica in _topologyService.allReadReplicas().members().SetOfKeyValuePairs())
{
ReadReplicaInfo readReplicaInfo = readReplica.Value;
endpoints.Add(new ReadWriteEndPoint(readReplicaInfo.Connectors(), RoleInfo.READ_REPLICA, readReplica.Key.Uuid, new IList <string> {
readReplicaInfo.Groups()
}, readReplicaInfo.DatabaseName));
}
endpoints.sort(comparing(o => o.addresses().ToString()));
return(map(endpoint => new object[] { endpoint.memberId().ToString(), endpoint.addresses().uriList().Select(URI.toString).ToList(), endpoint.role().name(), endpoint.groups(), endpoint.dbName() }, asRawIterator(endpoints.GetEnumerator())));
}
public override Optional <MemberId> UpstreamDatabase()
{
CoreTopology coreTopology = TopologyService.allCoreServers();
return(Optional.ofNullable(coreTopology.Members().Keys.GetEnumerator().next()));
}
private IList <Endpoint> RouteEndpoints(CoreTopology cores)
{
return(cores.Members().Values.Select(extractBoltAddress()).Select(Endpoint.route).ToList());
}