virtual public void Connect(Session owner, bool moveNext, out int streamId)
{
if (_hostsIter == null)
{
_hostsIter = owner._policies.LoadBalancingPolicy.NewQueryPlan(Query).GetEnumerator();
if (!_hostsIter.MoveNext())
{
var ex = new NoHostAvailableException(new Dictionary <IPAddress, List <Exception> >());
_logger.Error(ex);
throw ex;
}
}
else
{
if (moveNext)
{
if (!_hostsIter.MoveNext())
{
var ex = new NoHostAvailableException(InnerExceptions);
_logger.Error(ex);
throw ex;
}
}
}
Connection = owner.Connect(Query, _hostsIter, TriedHosts, InnerExceptions, out streamId);
}
internal void Init()
{
var ci = this._policies.LoadBalancingPolicy.NewQueryPlan(null).GetEnumerator();
if (!ci.MoveNext())
{
var ex = new NoHostAvailableException(new Dictionary <IPAddress, Exception>());
_logger.Error(ex.Message);
throw ex;
}
var triedHosts = new List <IPAddress>();
var innerExceptions = new Dictionary <IPAddress, Exception>();
Connect(null, ci, triedHosts, innerExceptions);
}
private void SetupEventListener()
{
var triedHosts = new List <IPAddress>();
var innerExceptions = new Dictionary <IPAddress, List <Exception> >();
var hostsIter = _session._policies.LoadBalancingPolicy.NewQueryPlan(null).GetEnumerator();
if (!hostsIter.MoveNext())
{
var ex = new NoHostAvailableException(new Dictionary <IPAddress, List <Exception> >());
_logger.Error(ex);
throw ex;
}
int streamId;
var nconn = _session.Connect(null, hostsIter, triedHosts, innerExceptions, out streamId);
listeningOnHost = nconn.GetHostAdress();
Exception theExc = null;
nconn.CassandraEvent += new CassandraEventHandler(conn_CassandraEvent);
using (var ret = nconn.RegisterForCassandraEvent(streamId,
CassandraEventType.TopologyChange | CassandraEventType.StatusChange | CassandraEventType.SchemaChange))
{
if (!(ret is OutputVoid))
{
if (ret is OutputError)
{
theExc = (ret as OutputError).CreateException();
}
else
{
theExc = new DriverInternalError("Expected Error on Output");
}
}
}
if (theExc != null)
{
_logger.Error(theExc);
throw theExc;
}
}
private void SetupEventListener()
{
var triedHosts = new List <IPAddress>();
var innerExceptions = new Dictionary <IPAddress, List <Exception> >();
IEnumerator <Host> hostsIter = _session.Policies.LoadBalancingPolicy.NewQueryPlan(null).GetEnumerator();
if (!hostsIter.MoveNext())
{
var ex = new NoHostAvailableException(new Dictionary <IPAddress, List <Exception> >());
_logger.Error(ex);
throw ex;
}
_activeConnection.Value = _session.Connect(hostsIter, triedHosts, innerExceptions, out _lockingStreamId);
int streamId = _activeConnection.Value.AllocateStreamId();
Exception theExc = null;
_activeConnection.Value.CassandraEvent += conn_CassandraEvent;
using (IOutput ret = _activeConnection.Value.RegisterForCassandraEvent(streamId,
CassandraEventType.TopologyChange | CassandraEventType.StatusChange |
CassandraEventType.SchemaChange))
{
if (!(ret is OutputVoid))
{
if (ret is OutputError)
{
theExc = (ret as OutputError).CreateException();
}
else
{
theExc = new DriverInternalError("Expected Error on Output");
}
}
}
if (theExc != null)
{
_logger.Error(theExc);
throw theExc;
}
}
internal void Init(bool allock = true)
{
if (allock)
{
var ci = Policies.LoadBalancingPolicy.NewQueryPlan(null).GetEnumerator();
if (!ci.MoveNext())
{
var ex = new NoHostAvailableException(new Dictionary <IPAddress, List <Exception> >());
_logger.Error(ex.Message);
throw ex;
}
var triedHosts = new List <IPAddress>();
var innerExceptions = new Dictionary <IPAddress, List <Exception> >();
int streamId;
var con = Connect(ci, triedHosts, innerExceptions, out streamId);
con.FreeStreamId(streamId);
}
_trashcanCleaner = new Timer(TranscanCleanup, null, Timeout.Infinite, Timeout.Infinite);
}
internal CassandraConnection Connect(Query query, IEnumerator <Host> hostsIter, List <IPAddress> triedHosts, Dictionary <IPAddress, List <Exception> > innerExceptions, out int streamId)
{
CheckDisposed();
lock (_connectionPool)
{
List <CassandraConnection> toDel = null;
foreach (var conn in _trashcan)
{
if (conn.IsEmpty())
{
_logger.Info("Connection trashed");
conn.Dispose();
if (toDel == null)
{
toDel = new List <CassandraConnection>();
}
toDel.Add(conn);
}
}
if (toDel != null)
{
foreach (var d in toDel)
{
_trashcan.Remove(d);
}
}
while (true)
{
var currentHost = hostsIter.Current;
if (currentHost == null)
{
var ex = new NoHostAvailableException(innerExceptions);
_logger.Error("All hosts are not responding.", ex);
throw ex;
}
if (currentHost.IsConsiderablyUp)
{
triedHosts.Add(currentHost.Address);
var hostDistance = _policies.LoadBalancingPolicy.Distance(currentHost);
if (!_connectionPool.ContainsKey(currentHost.Address))
{
_connectionPool.Add(currentHost.Address, new List <CassandraConnection>());
}
var pool = _connectionPool[currentHost.Address];
var poolCpy = new List <CassandraConnection>(pool);
CassandraCounters.SetConnectionsCount(currentHost.Address, poolCpy.Count);
CassandraConnection toReturn = null;
foreach (var conn in poolCpy)
{
if (!conn.IsHealthy)
{
pool.Remove(conn);
conn.Dispose();
}
else
{
if (toReturn == null)
{
if (!conn.IsBusy(_poolingOptions.GetMaxSimultaneousRequestsPerConnectionTreshold(hostDistance)))
{
toReturn = conn;
}
}
else
{
if (pool.Count > _poolingOptions.GetCoreConnectionsPerHost(hostDistance))
{
if (conn.IsFree(_poolingOptions.GetMinSimultaneousRequestsPerConnectionTreshold(hostDistance)))
{
_trashcan.Add(conn);
pool.Remove(conn);
}
}
}
}
}
if (toReturn != null)
{
streamId = toReturn.AllocateStreamId();
return(toReturn);
}
if (pool.Count < _poolingOptions.GetMaxConnectionPerHost(hostDistance) - 1)
{
bool error = false;
CassandraConnection conn = null;
do
{
Exception outExc;
conn = AllocateConnection(currentHost.Address, out outExc);
if (conn != null)
{
if (_cluster.Metadata != null)
{
_cluster.Metadata.BringUpHost(currentHost.Address, this);
}
pool.Add(conn);
}
else
{
if (!innerExceptions.ContainsKey(currentHost.Address))
{
innerExceptions.Add(currentHost.Address, new List <Exception>());
}
innerExceptions[currentHost.Address].Add(outExc);
_logger.Info("New connection attempt failed - goto another host.");
error = true;
break;
}
}while (pool.Count < _poolingOptions.GetCoreConnectionsPerHost(hostDistance));
if (!error)
{
streamId = conn.AllocateStreamId();
return(conn);
}
}
}
_logger.Verbose(string.Format("Currently tried host: {0} have all of connections busy. Switching to the next host.", currentHost.Address));
if (!hostsIter.MoveNext())
{
var ex = new NoHostAvailableException(innerExceptions);
_logger.Error("Cannot connect to any host from pool.", ex);
throw ex;
}
}
}
}
private void SetupEventListener()
{
var triedHosts = new List<IPAddress>();
var innerExceptions = new Dictionary<IPAddress, List<Exception>>();
var hostsIter = _session._policies.LoadBalancingPolicy.NewQueryPlan(null).GetEnumerator();
if (!hostsIter.MoveNext())
{
var ex = new NoHostAvailableException(new Dictionary<IPAddress, List<Exception>>());
_logger.Error(ex);
throw ex;
}
_activeConnection.Value = _session.Connect(hostsIter, triedHosts, innerExceptions, out _lockingStreamId);
int streamId = _activeConnection.Value.AllocateStreamId();
Exception theExc = null;
_activeConnection.Value.CassandraEvent += new CassandraEventHandler(conn_CassandraEvent);
using (var ret = _activeConnection.Value.RegisterForCassandraEvent(streamId,
CassandraEventType.TopologyChange | CassandraEventType.StatusChange | CassandraEventType.SchemaChange))
{
if (!(ret is OutputVoid))
{
if (ret is OutputError)
theExc = (ret as OutputError).CreateException();
else
theExc = new DriverInternalError("Expected Error on Output");
}
}
if (theExc != null)
{
_logger.Error(theExc);
throw theExc;
}
}
internal CassandraConnection Connect(IEnumerator<Host> hostsIter, List<IPAddress> triedHosts, Dictionary<IPAddress, List<Exception>> innerExceptions, out int streamId)
{
CheckDisposed();
while (true)
{
var currentHost = hostsIter.Current;
if (currentHost == null)
{
var ex = new NoHostAvailableException(innerExceptions);
_logger.Error("All hosts are not responding.", ex);
throw ex;
}
if (currentHost.IsConsiderablyUp)
{
triedHosts.Add(currentHost.Address);
var hostDistance = _policies.LoadBalancingPolicy.Distance(currentHost);
RETRY_GET_POOL:
if (!_connectionPool.ContainsKey(currentHost.Address))
_connectionPool.TryAdd(currentHost.Address, new ConcurrentDictionary<Guid, CassandraConnection>());
ConcurrentDictionary<Guid, CassandraConnection> pool;
if (!_connectionPool.TryGetValue(currentHost.Address, out pool))
goto RETRY_GET_POOL;
// CassandraCounters.SetConnectionsCount(currentHost.Address, pool.Count);
foreach (var kv in pool)
{
CassandraConnection conn = kv.Value;
if (!conn.IsHealthy)
{
CassandraConnection cc;
if(pool.TryRemove(conn.Guid, out cc))
FreeConnection(cc);
}
else
{
if (!conn.IsBusy(_poolingOptions.GetMaxSimultaneousRequestsPerConnectionTreshold(hostDistance)))
{
streamId = conn.AllocateStreamId();
return conn;
}
else
{
if (pool.Count > _poolingOptions.GetCoreConnectionsPerHost(hostDistance))
{
if (conn.IsFree(_poolingOptions.GetMinSimultaneousRequestsPerConnectionTreshold(hostDistance)))
{
CassandraConnection cc;
if (pool.TryRemove(conn.Guid, out cc))
TrashcanPut(cc);
}
}
}
}
}
{
var conn = TrashcanRecycle(currentHost.Address);
if (conn != null)
{
if (!conn.IsHealthy)
FreeConnection(conn);
else
{
pool.TryAdd(conn.Guid, conn);
streamId = conn.AllocateStreamId();
return conn;
}
}
// if not recycled
{
Exception outExc;
conn = AllocateConnection(currentHost.Address, hostDistance, out outExc);
if (conn != null)
{
if (_cluster.Metadata != null)
_cluster.Metadata.BringUpHost(currentHost.Address, this);
pool.TryAdd(conn.Guid, conn);
streamId = conn.AllocateStreamId();
return conn;
}
else
{
if (!innerExceptions.ContainsKey(currentHost.Address))
innerExceptions.Add(currentHost.Address, new List<Exception>());
innerExceptions[currentHost.Address].Add(outExc);
_logger.Info("New connection attempt failed - goto another host.");
}
}
}
}
_logger.Verbose(string.Format("Currently tried host: {0} have all of connections busy. Switching to the next host.", currentHost.Address));
if (!hostsIter.MoveNext())
{
var ex = new NoHostAvailableException(innerExceptions);
_logger.Error("Cannot connect to any host from pool.", ex);
throw ex;
}
}
}
internal Session(Cluster cluster,
Policies policies,
ProtocolOptions protocolOptions,
PoolingOptions poolingOptions,
SocketOptions socketOptions,
ClientOptions clientOptions,
IAuthInfoProvider authProvider,
string keyspace, bool init)
{
try
{
this._cluster = cluster;
this._protocolOptions = protocolOptions;
this._poolingOptions = poolingOptions;
this._socketOptions = socketOptions;
this._clientOptions = clientOptions;
this._authProvider = authProvider;
this._policies = policies ?? Policies.DefaultPolicies;
this._policies.LoadBalancingPolicy.Initialize(_cluster);
_keyspace = keyspace ?? clientOptions.DefaultKeyspace;
Guid = Guid.NewGuid();
_trashcanCleaner = new Timer(TranscanCleanup, null, Timeout.Infinite, Timeout.Infinite);
if (init)
{
var ci = this._policies.LoadBalancingPolicy.NewQueryPlan(null).GetEnumerator();
if (!ci.MoveNext())
{
var ex = new NoHostAvailableException(new Dictionary<IPAddress, List<Exception>>());
_logger.Error(ex.Message);
throw ex;
}
var triedHosts = new List<IPAddress>();
var innerExceptions = new Dictionary<IPAddress, List<Exception>>();
int streamId;
var con = Connect(ci, triedHosts, innerExceptions, out streamId);
con.FreeStreamId(streamId);
}
}
catch
{
InternalDispose();
throw;
}
}
public virtual void Connect(Session owner, bool moveNext, out int streamId)
{
if (_hostsIter == null)
{
_hostsIter = owner._policies.LoadBalancingPolicy.NewQueryPlan(Query).GetEnumerator();
if (!_hostsIter.MoveNext())
{
var ex = new NoHostAvailableException(new Dictionary<IPAddress, List<Exception>>());
_logger.Error(ex);
throw ex;
}
}
else
{
if (moveNext)
if (!_hostsIter.MoveNext())
{
var ex = new NoHostAvailableException(InnerExceptions);
_logger.Error(ex);
throw ex;
}
}
Connection = owner.Connect(_hostsIter, TriedHosts, InnerExceptions, out streamId);
}
internal void Init()
{
var ci = this._policies.LoadBalancingPolicy.NewQueryPlan(null).GetEnumerator();
if (!ci.MoveNext())
{
var ex = new NoHostAvailableException(new Dictionary<IPAddress, List<Exception>>());
_logger.Error(ex.Message);
throw ex;
}
var triedHosts = new List<IPAddress>();
var innerExceptions = new Dictionary<IPAddress, List<Exception>>();
Connect(null, ci, triedHosts, innerExceptions);
}
internal CassandraConnection Connect(Query query, IEnumerator<Host> hostsIter, List<IPAddress> triedHosts, Dictionary<IPAddress, List<Exception>> innerExceptions)
{
CheckDisposed();
lock (_trashcan)
{
foreach (var conn in _trashcan)
{
if (conn.IsEmpty())
{
_logger.Error("Connection trashed");
conn.Dispose();
}
}
}
lock (_connectionPool)
{
while (true)
{
var currentHost = hostsIter.Current;
if (currentHost == null)
{
var ex = new NoHostAvailableException(innerExceptions);
_logger.Error("All hosts are not responding.", ex);
throw ex;
}
if (currentHost.IsConsiderablyUp)
{
triedHosts.Add(currentHost.Address);
var hostDistance = _policies.LoadBalancingPolicy.Distance(currentHost);
if (!_connectionPool.ContainsKey(currentHost.Address))
_connectionPool.Add(currentHost.Address, new List<CassandraConnection>());
var pool = _connectionPool[currentHost.Address];
var poolCpy = new List<CassandraConnection>(pool);
CassandraConnection toReturn = null;
foreach (var conn in poolCpy)
{
if (!conn.IsHealthy)
{
pool.Remove(conn);
conn.Dispose();
}
else
{
if (toReturn == null)
{
if (!conn.IsBusy(_poolingOptions.GetMaxSimultaneousRequestsPerConnectionTreshold(hostDistance)))
toReturn = conn;
}
else
{
if (pool.Count > _poolingOptions.GetCoreConnectionsPerHost(hostDistance))
{
if (conn.IsFree(_poolingOptions.GetMinSimultaneousRequestsPerConnectionTreshold(hostDistance)))
{
lock (_trashcan)
_trashcan.Add(conn);
pool.Remove(conn);
}
}
}
}
}
if (toReturn != null)
return toReturn;
if (pool.Count < _poolingOptions.GetMaxConnectionPerHost(hostDistance) - 1)
{
bool error = false;
CassandraConnection conn = null;
do
{
Exception outExc;
conn = AllocateConnection(currentHost.Address, out outExc);
if (conn != null)
{
if (_cluster.Metadata != null)
_cluster.Metadata.BringUpHost(currentHost.Address, this);
pool.Add(conn);
}
else
{
if (!innerExceptions.ContainsKey(currentHost.Address))
innerExceptions.Add(currentHost.Address, new List<Exception>());
innerExceptions[currentHost.Address].Add(outExc);
_logger.Info("New connection attempt failed - goto another host.");
error = true;
break;
}
}
while (pool.Count < _poolingOptions.GetCoreConnectionsPerHost(hostDistance));
if (!error)
return conn;
}
}
if (!hostsIter.MoveNext())
{
var ex = new NoHostAvailableException(innerExceptions);
_logger.Error("Cannot connect to any host from pool.", ex);
throw ex;
}
}
}
}
internal void Init(bool allock=true)
{
if (allock)
{
var ci = this._policies.LoadBalancingPolicy.NewQueryPlan(null).GetEnumerator();
if (!ci.MoveNext())
{
var ex = new NoHostAvailableException(new Dictionary<IPAddress, List<Exception>>());
_logger.Error(ex.Message);
throw ex;
}
var triedHosts = new List<IPAddress>();
var innerExceptions = new Dictionary<IPAddress, List<Exception>>();
int streamId;
var con = Connect(null, ci, triedHosts, innerExceptions, out streamId);
con.FreeStreamId(streamId);
}
_trashcanCleaner = new Timer(TranscanCleanup, null, Timeout.Infinite, Timeout.Infinite);
}
internal void Init()
{
var ci = this._policies.LoadBalancingPolicy.NewQueryPlan(null).GetEnumerator();
if (!ci.MoveNext())
{
var ex = new NoHostAvailableException(new Dictionary<IPAddress, Exception>());
_logger.Error(ex.Message);
throw ex;
}
Connect(null, ci);
}
internal CassandraConnection Connect(IEnumerator <Host> hostsIter, List <IPAddress> triedHosts, Dictionary <IPAddress, List <Exception> > innerExceptions, out int streamId)
{
CheckDisposed();
while (true)
{
var currentHost = hostsIter.Current;
if (currentHost == null)
{
var ex = new NoHostAvailableException(innerExceptions);
_logger.Error("All hosts are not responding.", ex);
throw ex;
}
if (currentHost.IsConsiderablyUp)
{
triedHosts.Add(currentHost.Address);
var hostDistance = Policies.LoadBalancingPolicy.Distance(currentHost);
RETRY_GET_POOL:
if (!_connectionPool.ContainsKey(currentHost.Address))
{
_connectionPool.TryAdd(currentHost.Address, new ConcurrentDictionary <Guid, CassandraConnection>());
}
ConcurrentDictionary <Guid, CassandraConnection> pool;
if (!_connectionPool.TryGetValue(currentHost.Address, out pool))
{
goto RETRY_GET_POOL;
}
// CassandraCounters.SetConnectionsCount(currentHost.Address, pool.Count);
foreach (var kv in pool)
{
CassandraConnection conn = kv.Value;
if (!conn.IsHealthy)
{
CassandraConnection cc;
if (pool.TryRemove(conn.Guid, out cc))
{
FreeConnection(cc);
}
}
else
{
if (!conn.IsBusy(_poolingOptions.GetMaxSimultaneousRequestsPerConnectionTreshold(hostDistance)))
{
streamId = conn.AllocateStreamId();
return(conn);
}
else
{
if (pool.Count > _poolingOptions.GetCoreConnectionsPerHost(hostDistance))
{
if (conn.IsFree(_poolingOptions.GetMinSimultaneousRequestsPerConnectionTreshold(hostDistance)))
{
CassandraConnection cc;
if (pool.TryRemove(conn.Guid, out cc))
{
TrashcanPut(cc);
}
}
}
}
}
}
{
var conn = TrashcanRecycle(currentHost.Address);
if (conn != null)
{
if (!conn.IsHealthy)
{
FreeConnection(conn);
}
else
{
pool.TryAdd(conn.Guid, conn);
streamId = conn.AllocateStreamId();
return(conn);
}
}
// if not recycled
{
Exception outExc;
conn = AllocateConnection(currentHost.Address, hostDistance, out outExc);
if (conn != null)
{
if (_cluster.Metadata != null)
{
_cluster.Metadata.BringUpHost(currentHost.Address, this);
}
pool.TryAdd(conn.Guid, conn);
streamId = conn.AllocateStreamId();
return(conn);
}
else
{
if (!innerExceptions.ContainsKey(currentHost.Address))
{
innerExceptions.Add(currentHost.Address, new List <Exception>());
}
innerExceptions[currentHost.Address].Add(outExc);
_logger.Info("New connection attempt failed - goto another host.");
}
}
}
}
_logger.Verbose(string.Format("Currently tried host: {0} have all of connections busy. Switching to the next host.", currentHost.Address));
if (!hostsIter.MoveNext())
{
var ex = new NoHostAvailableException(innerExceptions);
_logger.Error("Cannot connect to any host from pool.", ex);
throw ex;
}
}
}
private void SetupEventListener()
{
var triedHosts = new List<IPAddress>();
var innerExceptions = new Dictionary<IPAddress, Exception>();
var hostsIter = _session._policies.LoadBalancingPolicy.NewQueryPlan(null).GetEnumerator();
if (!hostsIter.MoveNext())
{
var ex = new NoHostAvailableException(new Dictionary<IPAddress, Exception>());
_logger.Error(ex);
throw ex;
}
var nconn = _session.Connect(null, hostsIter, triedHosts, innerExceptions);
listeningOnHost = nconn.GetHostAdress();
Exception theExc = null;
nconn.CassandraEvent += new CassandraEventHandler(conn_CassandraEvent);
using (var ret = nconn.RegisterForCassandraEvent(
CassandraEventType.TopologyChange | CassandraEventType.StatusChange | CassandraEventType.SchemaChange))
{
if (!(ret is OutputVoid))
{
if (ret is OutputError)
theExc = (ret as OutputError).CreateException();
else
theExc = new DriverInternalError("Expected Error on Output");
}
}
if (theExc != null)
{
_logger.Error(theExc);
throw theExc;
}
}
