void FreeConnection(CassandraConnection connection)
{
connection.Dispose();
AtomicValue <int> val;
_allocatedConnections.TryGetValue(connection.GetHostAdress(), out val);
var no = Interlocked.Decrement(ref val.RawValue);
}
void TrashcanPut(CassandraConnection conn)
{
RETRY:
if (!_trashcan.ContainsKey(conn.GetHostAdress()))
{
_trashcan.TryAdd(conn.GetHostAdress(), new ConcurrentDictionary <Guid, CassandraConnection>());
}
ConcurrentDictionary <Guid, CassandraConnection> trashes;
if (_trashcan.TryGetValue(conn.GetHostAdress(), out trashes))
{
trashes.TryAdd(conn.Guid, conn);
}
else
{
goto RETRY;
}
_trashcanCleaner.Change(10000, Timeout.Infinite);
}
private void RefreshNodeListAndTokenMap(CassandraConnection connection)
{
_logger.Info("Refreshing NodeList and TokenMap..");
// Make sure we're up to date on nodes and tokens
var tokenMap = new Dictionary<IPAddress, DictSet<string>>();
string partitioner = null;
using (var rowset = _session.Query(SelectLocal, ConsistencyLevel.Default))
{
// Update cluster name, DC and rack for the one node we are connected to
foreach (var localRow in rowset.GetRows())
{
var clusterName = localRow.GetValue<string>("cluster_name");
if (clusterName != null)
_cluster.Metadata.ClusterName = clusterName;
var host = _cluster.Metadata.GetHost(connection.GetHostAdress());
// In theory host can't be null. However there is no point in risking a NPE in case we
// have a race between a node removal and this.
if (host != null)
{
host.SetLocationInfo(localRow.GetValue<string>("data_center"), localRow.GetValue<string>("rack"));
partitioner = localRow.GetValue<string>("partitioner");
var tokens = localRow.GetValue<IList<string>>("tokens");
if (partitioner != null && tokens.Count > 0)
{
if (!tokenMap.ContainsKey(host.Address))
tokenMap.Add(host.Address, new DictSet<string>());
tokenMap[host.Address].AddRange(tokens);
}
}
break;
}
}
var foundHosts = new List<IPAddress>();
var dcs = new List<string>();
var racks = new List<string>();
var allTokens = new List<DictSet<string>>();
using (var rowset = _session.Query(SelectPeers, ConsistencyLevel.Default))
{
foreach (var row in rowset.GetRows())
{
var hstip = row.GetValue<IPEndPoint>("peer").Address;
if (hstip != null)
{
foundHosts.Add(hstip);
dcs.Add(row.GetValue<string>("data_center"));
racks.Add(row.GetValue<string>("rack"));
allTokens.Add(new DictSet<string>(row.GetValue<IEnumerable<string>>("tokens")));
}
}
}
for (int i = 0; i < foundHosts.Count; i++)
{
var host = _cluster.Metadata.GetHost(foundHosts[i]);
if (host == null)
{
// We don't know that node, add it.
host = _cluster.Metadata.AddHost(foundHosts[i], _session._policies.ReconnectionPolicy);
}
host.SetLocationInfo(dcs[i], racks[i]);
if (partitioner != null && !allTokens[i].IsEmpty)
tokenMap.Add(host.Address, allTokens[i]);
}
// Removes all those that seems to have been removed (since we lost the control connection)
var foundHostsSet = new DictSet<IPAddress>(foundHosts);
foreach (var host in _cluster.Metadata.AllReplicas())
if (!host.Equals(connection.GetHostAdress()) && !foundHostsSet.Contains(host))
_cluster.Metadata.RemoveHost(host);
if (partitioner != null)
_cluster.Metadata.RebuildTokenMap(partitioner, tokenMap);
_logger.Info("NodeList and TokenMap have been successfully refreshed!");
}
void TrashcanPut(CassandraConnection conn)
{
RETRY:
if (!_trashcan.ContainsKey(conn.GetHostAdress()))
_trashcan.TryAdd(conn.GetHostAdress(), new ConcurrentDictionary<Guid, CassandraConnection>());
ConcurrentDictionary<Guid, CassandraConnection> trashes;
if (_trashcan.TryGetValue(conn.GetHostAdress(), out trashes))
trashes.TryAdd(conn.Guid,conn);
else
goto RETRY;
_trashcanCleaner.Change(10000, Timeout.Infinite);
}
void FreeConnection(CassandraConnection connection)
{
connection.Dispose();
AtomicValue<int> val;
_allocatedConnections.TryGetValue(connection.GetHostAdress(), out val);
var no = Interlocked.Decrement(ref val.RawValue);
}
