public static TokenMap Build(string partitioner, ICollection <Host> hosts, ICollection <KeyspaceMetadata> keyspaces)
{
var sw = new Stopwatch();
sw.Start();
var factory = TokenFactory.GetFactory(partitioner);
if (factory == null)
{
return(null);
}
var primaryReplicas = new Dictionary <IToken, Host>();
var allSorted = new SortedSet <IToken>();
var datacenters = new Dictionary <string, DatacenterInfo>();
foreach (var host in hosts)
{
if (host.Datacenter != null)
{
if (!datacenters.TryGetValue(host.Datacenter, out var dc))
{
datacenters[host.Datacenter] = dc = new DatacenterInfo();
}
dc.HostLength++;
dc.AddRack(host.Rack);
}
foreach (var tokenStr in host.Tokens)
{
try
{
var token = factory.Parse(tokenStr);
allSorted.Add(token);
primaryReplicas[token] = host;
}
catch (Exception ex)
{
TokenMap.Logger.Error($"Token {tokenStr} could not be parsed using {partitioner} partitioner implementation. Exception: {ex}");
}
}
}
var ring = new List <IToken>(allSorted);
var tokenToHosts = new Dictionary <string, IReadOnlyDictionary <IToken, ISet <Host> > >(keyspaces.Count);
var ksTokensCache = new Dictionary <IReplicationStrategy, IReadOnlyDictionary <IToken, ISet <Host> > >();
//Only consider nodes that have tokens
var numberOfHostsWithTokens = hosts.Count(h => h.Tokens.Any());
foreach (var ks in keyspaces)
{
TokenMap.UpdateKeyspace(ks, tokenToHosts, ring, primaryReplicas, ksTokensCache, datacenters, numberOfHostsWithTokens);
}
sw.Stop();
TokenMap.Logger.Info(
"Finished building TokenMap for {0} keyspaces and {1} hosts. It took {2:0} milliseconds.",
keyspaces.Count,
hosts.Count,
sw.Elapsed.TotalMilliseconds);
return(new TokenMap(factory, tokenToHosts, ring, primaryReplicas, ksTokensCache, datacenters, numberOfHostsWithTokens));
}
public static TokenMap Build(String partitioner, Dictionary <IPAddress, DictSet <string> > allTokens)
{
TokenFactory factory = TokenFactory.GetFactory(partitioner);
if (factory == null)
{
return(null);
}
Dictionary <IToken, DictSet <IPAddress> > tokenToCassandraClusterHosts = new Dictionary <IToken, DictSet <IPAddress> >();
DictSet <IToken> allSorted = new DictSet <IToken>();
foreach (var entry in allTokens)
{
var cassandraClusterHost = entry.Key;
foreach (string tokenStr in entry.Value)
{
try
{
IToken t = factory.Parse(tokenStr);
allSorted.Add(t);
if (!tokenToCassandraClusterHosts.ContainsKey(t))
{
tokenToCassandraClusterHosts.Add(t, new DictSet <IPAddress>());
}
tokenToCassandraClusterHosts[t].Add(cassandraClusterHost);
}
catch (ArgumentException e)
{
// If we failed parsing that token, skip it
}
}
}
return(new TokenMap(factory, tokenToCassandraClusterHosts, new List <IToken>(allSorted)));
}
public static TokenMap Build(string partitioner, ICollection <Host> hosts, ICollection <KeyspaceMetadata> keyspaces)
{
var factory = TokenFactory.GetFactory(partitioner);
if (factory == null)
{
return(null);
}
var primaryReplicas = new Dictionary <IToken, Host>();
var allSorted = new SortedSet <IToken>();
var datacenters = new Dictionary <string, int>();
foreach (var host in hosts)
{
if (host.Datacenter != null)
{
if (!datacenters.ContainsKey(host.Datacenter))
{
datacenters[host.Datacenter] = 1;
}
else
{
datacenters[host.Datacenter]++;
}
}
foreach (var tokenStr in host.Tokens)
{
try
{
var token = factory.Parse(tokenStr);
allSorted.Add(token);
primaryReplicas[token] = host;
}
catch
{
_logger.Error(String.Format("Token {0} could not be parsed using {1} partitioner implementation", tokenStr, partitioner));
}
}
}
var ring = new List <IToken>(allSorted);
var tokenToHosts = new Dictionary <string, Dictionary <IToken, HashSet <Host> > >(keyspaces.Count);
//Only consider nodes that have tokens
var hostCount = hosts.Count(h => h.Tokens.Any());
foreach (var ks in keyspaces)
{
Dictionary <IToken, HashSet <Host> > replicas;
if (ks.StrategyClass == ReplicationStrategies.SimpleStrategy)
{
replicas = ComputeTokenToReplicaSimple(ks.Replication["replication_factor"], hostCount, ring, primaryReplicas);
}
else if (ks.StrategyClass == ReplicationStrategies.NetworkTopologyStrategy)
{
replicas = ComputeTokenToReplicaNetwork(ks.Replication, ring, primaryReplicas, datacenters);
}
else
{
//No replication information, use primary replicas
replicas = primaryReplicas.ToDictionary(kv => kv.Key, kv => new HashSet <Host>(new [] { kv.Value }));
}
tokenToHosts[ks.Name] = replicas;
}
return(new TokenMap(factory, tokenToHosts, ring, primaryReplicas));
}
