/// <summary>
/// Adds contact points as hosts and resolving host names if necessary.
/// </summary>
/// <exception cref="NoHostAvailableException">When no host can be resolved and no other contact point is an address</exception>
private async Task AddHosts(IEnumerable <object> contactPoints)
{
var resolvedContactPoints = new Dictionary <string, ICollection <IPEndPoint> >();
var hostNames = new List <string>();
foreach (var contactPoint in contactPoints)
{
if (contactPoint is IPEndPoint endpoint)
{
resolvedContactPoints.CreateOrAdd(endpoint.ToString(), endpoint);
_metadata.AddHost(endpoint);
continue;
}
if (!(contactPoint is string contactPointText))
{
throw new InvalidOperationException("Contact points should be either string or IPEndPoint instances");
}
if (IPAddress.TryParse(contactPointText, out var ipAddress))
{
var ipEndpoint = new IPEndPoint(ipAddress, Configuration.ProtocolOptions.Port);
resolvedContactPoints.CreateOrAdd(contactPointText, ipEndpoint);
_metadata.AddHost(ipEndpoint);
continue;
}
hostNames.Add(contactPointText);
IPHostEntry hostEntry = null;
try
{
hostEntry = await Dns.GetHostEntryAsync(contactPointText).ConfigureAwait(false);
}
catch (Exception)
{
_logger.Warning($"Host '{contactPointText}' could not be resolved");
}
if (hostEntry != null && hostEntry.AddressList.Length > 0)
{
foreach (var resolvedAddress in hostEntry.AddressList)
{
var ipEndpoint = new IPEndPoint(resolvedAddress, Configuration.ProtocolOptions.Port);
_metadata.AddHost(ipEndpoint);
resolvedContactPoints.CreateOrAdd(contactPointText, ipEndpoint);
}
}
else
{
resolvedContactPoints.CreateIfDoesNotExist(contactPointText);
}
}
_metadata.SetResolvedContactPoints(resolvedContactPoints.ToDictionary(kvp => kvp.Key, kvp => kvp.Value.AsEnumerable()));
if (_metadata.Hosts.Count == 0)
{
throw new NoHostAvailableException($"No host name could be resolved, attempted: {string.Join(", ", hostNames)}");
}
}
/// <summary>
/// Adds contact points as hosts and resolving host names if necessary.
/// </summary>
/// <exception cref="NoHostAvailableException">When no host can be resolved and no other contact point is an address</exception>
private async Task AddHosts(IEnumerable <object> contactPoints)
{
var hostNames = new List <string>();
foreach (var contactPoint in contactPoints)
{
if (contactPoint is IPEndPoint endpoint)
{
_metadata.AddHost(endpoint);
continue;
}
if (!(contactPoint is string contactPointText))
{
throw new InvalidOperationException("Contact points should be either string or IPEndPoint instances");
}
if (IPAddress.TryParse(contactPointText, out var ipAddress))
{
_metadata.AddHost(new IPEndPoint(ipAddress, Configuration.ProtocolOptions.Port));
continue;
}
hostNames.Add(contactPointText);
IPHostEntry hostEntry = null;
try
{
hostEntry = await Dns.GetHostEntryAsync(contactPointText).ConfigureAwait(false);
}
catch (Exception)
{
_logger.Warning($"Host '{contactPointText}' could not be resolved");
}
if (hostEntry != null)
{
foreach (var resolvedAddress in hostEntry.AddressList)
{
_metadata.AddHost(new IPEndPoint(resolvedAddress, Configuration.ProtocolOptions.Port));
}
}
}
if (_metadata.Hosts.Count == 0)
{
throw new NoHostAvailableException($"No host name could be resolved, attempted: {string.Join(", ", hostNames)}");
}
}
internal void UpdatePeersInfo(IEnumerable <Row> rs)
{
var foundPeers = new HashSet <IPEndPoint>();
foreach (var row in rs)
{
var address = GetAddressForPeerHost(row, _config.AddressTranslator, _config.ProtocolOptions.Port);
if (address == null)
{
_logger.Error("No address found for host, ignoring it.");
continue;
}
foundPeers.Add(address);
var host = Metadata.GetHost(address);
if (host == null)
{
host = Metadata.AddHost(address);
}
host.SetLocationInfo(row.GetValue <string>("data_center"), row.GetValue <string>("rack"));
host.Tokens = row.GetValue <IEnumerable <string> >("tokens") ?? new string[0];
}
// Removes all those that seems to have been removed (since we lost the control connection or not valid contact point)
foreach (var address in Metadata.AllReplicas())
{
if (!address.Equals(_host.Address) && !foundPeers.Contains(address))
{
Metadata.RemoveHost(address);
}
}
}
private Cluster(IEnumerable <IPAddress> contactPoints, Configuration configuration)
{
this._contactPoints = contactPoints;
this._configuration = configuration;
this._metadata = new Metadata(configuration.Policies.ReconnectionPolicy);
var controlpolicies = new Cassandra.Policies(
//new ControlConnectionLoadBalancingPolicy(_configuration.Policies.LoadBalancingPolicy),
_configuration.Policies.LoadBalancingPolicy,
new ExponentialReconnectionPolicy(2 * 1000, 5 * 60 * 1000),
Cassandra.Policies.DefaultRetryPolicy);
foreach (var ep in _contactPoints)
{
Metadata.AddHost(ep);
}
var poolingOptions = new PoolingOptions()
.SetCoreConnectionsPerHost(HostDistance.Local, 0)
.SetMaxConnectionsPerHost(HostDistance.Local, 1)
.SetMinSimultaneousRequestsPerConnectionTreshold(HostDistance.Local, 0)
.SetMaxSimultaneousRequestsPerConnectionTreshold(HostDistance.Local, 127)
;
var controlConnection = new ControlConnection(this, new List <IPAddress>(), controlpolicies,
new ProtocolOptions(_configuration.ProtocolOptions.Port, configuration.ProtocolOptions.SslOptions),
poolingOptions, _configuration.SocketOptions,
new ClientOptions(
true,
_configuration.ClientOptions.QueryAbortTimeout, null),
_configuration.AuthProvider,
_configuration.AuthInfoProvider);
_metadata.SetupControllConnection(controlConnection);
}
private Cluster(IEnumerable <IPEndPoint> contactPoints, Configuration configuration)
{
Configuration = configuration;
_metadata = new Metadata(configuration.Policies.ReconnectionPolicy);
foreach (var ep in contactPoints)
{
_metadata.AddHost(ep);
}
}
private Cluster(IEnumerable <IPEndPoint> contactPoints, Configuration configuration)
{
Configuration = configuration;
_metadata = new Metadata(configuration);
foreach (var ep in contactPoints)
{
_metadata.AddHost(ep);
}
var protocolVersion = _maxProtocolVersion;
if (Configuration.ProtocolOptions.MaxProtocolVersionValue != null &&
Configuration.ProtocolOptions.MaxProtocolVersionValue.Value.IsSupported())
{
protocolVersion = Configuration.ProtocolOptions.MaxProtocolVersionValue.Value;
}
_controlConnection = new ControlConnection(protocolVersion, Configuration, _metadata);
_metadata.ControlConnection = _controlConnection;
_serializer = _controlConnection.Serializer;
}
private Cluster(IEnumerable<IPEndPoint> contactPoints, Configuration configuration)
{
Configuration = configuration;
_metadata = new Metadata(configuration);
foreach (var ep in contactPoints)
{
_metadata.AddHost(ep);
}
}