private RowSet ProcessRowset(IOutput outp, string originCqlQuery)
{
using (outp)
{
if (outp is OutputError)
{
DriverException ex = (outp as OutputError).CreateException();
_logger.Error(ex);
throw ex;
}
else if (outp is OutputVoid)
{
return(null);
}
else if (outp is OutputSchemaChange)
{
return(null);
}
else if (outp is OutputRows)
{
var queryHandler = new QueryRequestHandler();
return(queryHandler.ProcessResponse(outp, _session));
}
else
{
var ex = new DriverInternalError("Unexpected output kind");
_logger.Error(ex);
throw ex;
}
}
}
/// <summary>
/// Gets the definition of a User defined type
/// </summary>
public UdtColumnInfo GetUdtDefinition(string keyspace, string typeName)
{
var rs = Query(String.Format(SelectUdts + " WHERE keyspace_name='{0}' AND type_name = '{1}';", keyspace, typeName));
var row = rs.FirstOrDefault();
if (row == null)
{
return(null);
}
var udt = new UdtColumnInfo(row.GetValue <string>("keyspace_name") + "." + row.GetValue <string>("type_name"));
var fieldNames = row.GetValue <List <string> >("field_names");
var fieldTypes = row.GetValue <List <string> >("field_types");
if (fieldNames.Count != fieldTypes.Count)
{
var ex = new DriverInternalError("Field names and types for UDT do not match");
_logger.Error(ex);
throw ex;
}
for (var i = 0; i < fieldNames.Count; i++)
{
var field = TypeCodec.ParseDataType(fieldTypes[i]);
field.Name = fieldNames[i];
udt.Fields.Add(field);
}
return(udt);
}
private void ProcessPrepareQuery(IOutput outp, out RowSetMetadata metadata, out byte[] queryId)
{
using (outp)
{
if (outp is OutputError)
{
var ex = (outp as OutputError).CreateException();
_logger.Error(ex);
throw ex;
}
else if (outp is OutputPrepared)
{
queryId = (outp as OutputPrepared).QueryID;
metadata = (outp as OutputPrepared).Metadata;
_logger.Info("Prepared Query has been successfully processed.");
return; //ok
}
else
{
var ex = new DriverInternalError("Unexpected output kind");
_logger.Error("Prepared Query has returned an unexpected output kind.", ex);
throw ex;
}
}
}
private void conn_CassandraEvent(object sender, CassandraEventArgs e)
{
if (e is TopologyChangeEventArgs)
{
var tce = e as TopologyChangeEventArgs;
if (tce.What == TopologyChangeEventArgs.Reason.NewNode)
{
SetupControlConnection(true);
_cluster.Metadata.AddHost(tce.Address);
return;
}
else if (tce.What == TopologyChangeEventArgs.Reason.RemovedNode)
{
_cluster.Metadata.RemoveHost(tce.Address);
SetupControlConnection(!tce.Address.Equals(listeningOnHost));
return;
}
}
else if (e is StatusChangeEventArgs)
{
var sce = e as StatusChangeEventArgs;
if (sce.What == StatusChangeEventArgs.Reason.Up)
{
_cluster.Metadata.BringUpHost(sce.Address, this);
return;
}
else if (sce.What == StatusChangeEventArgs.Reason.Down)
{
_cluster.Metadata.SetDownHost(sce.Address, this);
return;
}
}
else if (e is SchemaChangeEventArgs)
{
var ssc = e as SchemaChangeEventArgs;
if (ssc.What == SchemaChangeEventArgs.Reason.Created)
{
SubmitSchemaRefresh(string.IsNullOrEmpty(ssc.Keyspace) ? null : ssc.Keyspace, null);
return;
}
else if (ssc.What == SchemaChangeEventArgs.Reason.Dropped)
{
SubmitSchemaRefresh(string.IsNullOrEmpty(ssc.Keyspace) ? null : ssc.Keyspace, null);
return;
}
else if (ssc.What == SchemaChangeEventArgs.Reason.Updated)
{
SubmitSchemaRefresh(ssc.Keyspace, string.IsNullOrEmpty(ssc.Table) ? null : ssc.Table);
return;
}
}
var ex = new DriverInternalError("Unknown Event");
_logger.Error(ex);
throw ex;
}
private RowSet ProcessRowset(IOutput outp)
{
bool ok = false;
try
{
if (outp is OutputError)
{
var ex = (outp as OutputError).CreateException();
_logger.Error(ex);
throw ex;
}
else if (outp is OutputVoid)
{
return(new RowSet(outp as OutputVoid, this));
}
else if (outp is OutputSchemaChange)
{
return(new RowSet(outp as OutputSchemaChange, this));
}
else if (outp is OutputSetKeyspace)
{
SetKeyspace((outp as OutputSetKeyspace).Value);
return(new RowSet(outp as OutputSetKeyspace, this));
}
else if (outp is OutputRows)
{
ok = true;
return(new RowSet(outp as OutputRows, this, true));
}
else
{
var ex = new DriverInternalError("Unexpected output kind");
_logger.Error(ex);
throw ex;
}
}
finally
{
if (!ok)
{
outp.Dispose();
}
}
}
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;
}
}
private IDictionary <string, string[]> ProcessExecuteOptions(IOutput outp)
{
using (outp)
{
if (outp is OutputError)
{
var ex = (outp as OutputError).CreateException();
_logger.Error(ex);
throw ex;
}
else if (outp is OutputOptions)
{
return((outp as OutputOptions).Options);
}
else
{
var ex = new DriverInternalError("Unexpected output kind");
_logger.Error("Prepared Query has returned an unexpected output kind.", 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;
}
}
private IDictionary<string, string[]> ProcessExecuteOptions(IOutput outp)
{
using (outp)
{
if (outp is OutputError)
{
var ex = (outp as OutputError).CreateException();
_logger.Error(ex);
throw ex;
}
else if (outp is OutputOptions)
{
return (outp as OutputOptions).Options;
}
else
{
var ex = new DriverInternalError("Unexpected output kind");
_logger.Error("Prepared Query has returned an unexpected output kind.", ex);
throw ex;
}
}
}
private ColumnTypeCode convertToColumnTypeCode(string type, out object[] collectionValueTp)
{
object[] obj;
collectionValueTp = new object[2];
if (type.StartsWith("org.apache.cassandra.db.marshal.ListType"))
{
collectionValueTp[0] = convertToColumnTypeCode(type.Replace("org.apache.cassandra.db.marshal.ListType(", "").Replace(")", ""), out obj);
return ColumnTypeCode.List;
}
if (type.StartsWith("org.apache.cassandra.db.marshal.SetType"))
{
collectionValueTp[0] = convertToColumnTypeCode(type.Replace("org.apache.cassandra.db.marshal.SetType(", "").Replace(")", ""), out obj);
return ColumnTypeCode.Set;
}
if (type.StartsWith("org.apache.cassandra.db.marshal.MapType"))
{
collectionValueTp[0] = convertToColumnTypeCode(type.Replace("org.apache.cassandra.db.marshal.MapType(", "").Replace(")", "").Split(',')[0], out obj);
collectionValueTp[1] = convertToColumnTypeCode(type.Replace("org.apache.cassandra.db.marshal.MapType(", "").Replace(")", "").Split(',')[1], out obj);
return ColumnTypeCode.Map;
}
collectionValueTp = null;
switch (type)
{
case "org.apache.cassandra.db.marshal.UTF8Type":
return ColumnTypeCode.Text;
case "org.apache.cassandra.db.marshal.UUIDType":
return ColumnTypeCode.Uuid;
case "org.apache.cassandra.db.marshal.Int32Type":
return ColumnTypeCode.Int;
case "org.apache.cassandra.db.marshal.BytesType":
return ColumnTypeCode.Blob;
case "org.apache.cassandra.db.marshal.FloatType":
return ColumnTypeCode.Float;
case "org.apache.cassandra.db.marshal.DoubleType":
return ColumnTypeCode.Double;
case "org.apache.cassandra.db.marshal.BooleanType":
return ColumnTypeCode.Boolean;
case "org.apache.cassandra.db.marshal.InetAddressType":
return ColumnTypeCode.Inet;
case "org.apache.cassandra.db.marshal.DateType":
return ColumnTypeCode.Timestamp;
case "org.apache.cassandra.db.marshal.LongType":
return ColumnTypeCode.Bigint;
case "org.apache.cassandra.db.marshal.DecimalType":
return ColumnTypeCode.Decimal;
case "org.apache.cassandra.db.marshal.IntegerType":
return ColumnTypeCode.Varint;
default:
var ex = new DriverInternalError("Unsupported data type:" + type);
_logger.Error(string.Format("Unsupported data type: {0}", type), ex);
throw ex;
}
}
private RowSet ProcessRowset(IOutput outp)
{
bool ok = false;
try
{
if (outp is OutputError)
{
var ex = (outp as OutputError).CreateException();
_logger.Error(ex);
throw ex;
}
else if (outp is OutputVoid)
return null;
else if (outp is OutputSchemaChange)
return null;
else if (outp is OutputRows)
{
ok = true;
return new RowSet(outp as OutputRows, null, true);
}
else
{
var ex = new DriverInternalError("Unexpected output kind");
_logger.Error(ex);
throw ex;
}
}
finally
{
if (!ok)
outp.Dispose();
}
}
/// <summary>
/// Gets the definition of a User defined type
/// </summary>
public UdtColumnInfo GetUdtDefinition(string keyspace, string typeName)
{
var rs = Query(String.Format(SelectUdts + " WHERE keyspace_name='{0}' AND type_name = '{1}';", keyspace, typeName));
var row = rs.FirstOrDefault();
if (row == null)
{
return null;
}
var udt = new UdtColumnInfo(row.GetValue<string>("keyspace_name") + "." + row.GetValue<string>("type_name"));
var fieldNames = row.GetValue<List<string>>("field_names");
var fieldTypes = row.GetValue<List<string>>("field_types");
if (fieldNames.Count != fieldTypes.Count)
{
var ex = new DriverInternalError("Field names and types for UDT do not match");
_logger.Error(ex);
throw ex;
}
for (var i = 0; i < fieldNames.Count; i++)
{
var field = TypeCodec.ParseDataType(fieldTypes[i]);
field.Name = fieldNames[i];
udt.Fields.Add(field);
}
return udt;
}
private void conn_CassandraEvent(object sender, CassandraEventArgs e)
{
var act = new Action<object>((_) =>
{
if (e is TopologyChangeEventArgs)
{
var tce = e as TopologyChangeEventArgs;
if (tce.What == TopologyChangeEventArgs.Reason.NewNode)
{
SetupControlConnection(true);
_cluster.Metadata.AddHost(tce.Address);
return;
}
else if (tce.What == TopologyChangeEventArgs.Reason.RemovedNode)
{
_cluster.Metadata.RemoveHost(tce.Address);
SetupControlConnection(_activeConnection.Value == null ? false : !tce.Address.Equals(_activeConnection.Value.GetHostAdress()));
return;
}
}
else if (e is StatusChangeEventArgs)
{
var sce = e as StatusChangeEventArgs;
if (sce.What == StatusChangeEventArgs.Reason.Up)
{
_cluster.Metadata.BringUpHost(sce.Address, this);
return;
}
else if (sce.What == StatusChangeEventArgs.Reason.Down)
{
_cluster.Metadata.SetDownHost(sce.Address, this);
return;
}
}
else if (e is SchemaChangeEventArgs)
{
var ssc = e as SchemaChangeEventArgs;
if (ssc.What == SchemaChangeEventArgs.Reason.Created)
{
SubmitSchemaRefresh(string.IsNullOrEmpty(ssc.Keyspace) ? null : ssc.Keyspace, null);
_cluster.Metadata.FireSchemaChangedEvent(SchemaChangedEventArgs.Kind.Created, string.IsNullOrEmpty(ssc.Keyspace) ? null : ssc.Keyspace, ssc.Table);
return;
}
else if (ssc.What == SchemaChangeEventArgs.Reason.Dropped)
{
SubmitSchemaRefresh(string.IsNullOrEmpty(ssc.Keyspace) ? null : ssc.Keyspace, null);
_cluster.Metadata.FireSchemaChangedEvent(SchemaChangedEventArgs.Kind.Dropped, string.IsNullOrEmpty(ssc.Keyspace) ? null : ssc.Keyspace, ssc.Table);
return;
}
else if (ssc.What == SchemaChangeEventArgs.Reason.Updated)
{
SubmitSchemaRefresh(ssc.Keyspace, string.IsNullOrEmpty(ssc.Table) ? null : ssc.Table);
_cluster.Metadata.FireSchemaChangedEvent(SchemaChangedEventArgs.Kind.Updated, string.IsNullOrEmpty(ssc.Keyspace) ? null : ssc.Keyspace, ssc.Table);
return;
}
}
var ex = new DriverInternalError("Unknown Event");
_logger.Error(ex);
throw ex;
});
act.BeginInvoke(null, (ar) => { act.EndInvoke(ar); }, null);
}
private void conn_CassandraEvent(object sender, CassandraEventArgs e)
{
if (e is TopologyChangeEventArgs)
{
var tce = e as TopologyChangeEventArgs;
if (tce.What == TopologyChangeEventArgs.Reason.NewNode)
{
if (CCEvent != null)
CCEvent.Invoke(this, new CCEventArgs() {IPAddress = tce.Address, What = CCEventArgs.Kind.Add});
CheckConnectionUp(tce.Address);
return;
}
else if (tce.What == TopologyChangeEventArgs.Reason.RemovedNode)
{
if (CCEvent != null)
CCEvent.Invoke(this, new CCEventArgs() { IPAddress = tce.Address, What = CCEventArgs.Kind.Remove });
CheckConnectionDown(tce.Address);
return;
}
}
else if (e is StatusChangeEventArgs)
{
var sce = e as StatusChangeEventArgs;
if (sce.What == StatusChangeEventArgs.Reason.Up)
{
if (CCEvent != null)
CCEvent.Invoke(this, new CCEventArgs() { IPAddress = sce.Address, What = CCEventArgs.Kind.Add });
CheckConnectionUp(sce.Address);
return;
}
else if (sce.What == StatusChangeEventArgs.Reason.Down)
{
if (CCEvent != null)
CCEvent.Invoke(this, new CCEventArgs() { IPAddress = sce.Address, What = CCEventArgs.Kind.Down });
CheckConnectionDown(sce.Address);
return;
}
}
else if (e is SchemaChangeEventArgs)
{
var ssc = e as SchemaChangeEventArgs;
if (ssc.What == SchemaChangeEventArgs.Reason.Created)
{
SubmitSchemaRefresh(string.IsNullOrEmpty(ssc.Keyspace) ? null : ssc.Keyspace, null);
return;
}
else if (ssc.What == SchemaChangeEventArgs.Reason.Dropped)
{
SubmitSchemaRefresh(string.IsNullOrEmpty(ssc.Keyspace) ? null : ssc.Keyspace, null);
return;
}
else if (ssc.What == SchemaChangeEventArgs.Reason.Updated)
{
SubmitSchemaRefresh(ssc.Keyspace, string.IsNullOrEmpty(ssc.Table) ? null : ssc.Table);
return;
}
}
var ex = new DriverInternalError("Unknown Event");
_logger.Error(ex);
throw ex;
}
private void SetupEventListeners(CassandraConnection nconn)
{
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;
}
}
private void conn_CassandraEvent(object sender, CassandraEventArgs e)
{
var act = new Action <object>((_) =>
{
if (e is TopologyChangeEventArgs)
{
var tce = e as TopologyChangeEventArgs;
if (tce.What == TopologyChangeEventArgs.Reason.NewNode)
{
SetupControlConnection(true);
_cluster.Metadata.AddHost(tce.Address);
return;
}
else if (tce.What == TopologyChangeEventArgs.Reason.RemovedNode)
{
_cluster.Metadata.RemoveHost(tce.Address);
SetupControlConnection(_activeConnection.Value == null ? false : !tce.Address.Equals(_activeConnection.Value.GetHostAdress()));
return;
}
}
else if (e is StatusChangeEventArgs)
{
var sce = e as StatusChangeEventArgs;
if (sce.What == StatusChangeEventArgs.Reason.Up)
{
_cluster.Metadata.BringUpHost(sce.Address, this);
return;
}
else if (sce.What == StatusChangeEventArgs.Reason.Down)
{
_cluster.Metadata.SetDownHost(sce.Address, this);
return;
}
}
else if (e is SchemaChangeEventArgs)
{
var ssc = e as SchemaChangeEventArgs;
if (ssc.What == SchemaChangeEventArgs.Reason.Created)
{
SubmitSchemaRefresh(string.IsNullOrEmpty(ssc.Keyspace) ? null : ssc.Keyspace, null);
return;
}
else if (ssc.What == SchemaChangeEventArgs.Reason.Dropped)
{
SubmitSchemaRefresh(string.IsNullOrEmpty(ssc.Keyspace) ? null : ssc.Keyspace, null);
return;
}
else if (ssc.What == SchemaChangeEventArgs.Reason.Updated)
{
SubmitSchemaRefresh(ssc.Keyspace, string.IsNullOrEmpty(ssc.Table) ? null : ssc.Table);
return;
}
}
var ex = new DriverInternalError("Unknown Event");
_logger.Error(ex);
throw ex;
});
act.BeginInvoke(null, (ar) => { act.EndInvoke(ar); }, null);
}
private ColumnTypeCode convertToColumnTypeCode(string type, out object[] collectionValueTp)
{
object[] obj;
collectionValueTp = new object[2];
if (type.StartsWith("org.apache.cassandra.db.marshal.ListType"))
{
collectionValueTp[0] = convertToColumnTypeCode(type.Replace("org.apache.cassandra.db.marshal.ListType(", "").Replace(")", ""), out obj);
return(ColumnTypeCode.List);
}
if (type.StartsWith("org.apache.cassandra.db.marshal.SetType"))
{
collectionValueTp[0] = convertToColumnTypeCode(type.Replace("org.apache.cassandra.db.marshal.SetType(", "").Replace(")", ""), out obj);
return(ColumnTypeCode.Set);
}
if (type.StartsWith("org.apache.cassandra.db.marshal.MapType"))
{
collectionValueTp[0] = convertToColumnTypeCode(type.Replace("org.apache.cassandra.db.marshal.MapType(", "").Replace(")", "").Split(',')[0], out obj);
collectionValueTp[1] = convertToColumnTypeCode(type.Replace("org.apache.cassandra.db.marshal.MapType(", "").Replace(")", "").Split(',')[1], out obj);
return(ColumnTypeCode.Map);
}
collectionValueTp = null;
switch (type)
{
case "org.apache.cassandra.db.marshal.UTF8Type":
return(ColumnTypeCode.Text);
case "org.apache.cassandra.db.marshal.UUIDType":
return(ColumnTypeCode.Uuid);
case "org.apache.cassandra.db.marshal.Int32Type":
return(ColumnTypeCode.Int);
case "org.apache.cassandra.db.marshal.BytesType":
return(ColumnTypeCode.Blob);
case "org.apache.cassandra.db.marshal.FloatType":
return(ColumnTypeCode.Float);
case "org.apache.cassandra.db.marshal.DoubleType":
return(ColumnTypeCode.Double);
case "org.apache.cassandra.db.marshal.BooleanType":
return(ColumnTypeCode.Boolean);
case "org.apache.cassandra.db.marshal.InetAddressType":
return(ColumnTypeCode.Inet);
case "org.apache.cassandra.db.marshal.DateType":
return(ColumnTypeCode.Timestamp);
case "org.apache.cassandra.db.marshal.LongType":
return(ColumnTypeCode.Bigint);
case "org.apache.cassandra.db.marshal.DecimalType":
return(ColumnTypeCode.Decimal);
case "org.apache.cassandra.db.marshal.IntegerType":
return(ColumnTypeCode.Varint);
default:
var ex = new DriverInternalError("Unsupported data type:" + type);
_logger.Error(string.Format("Unsupported data type: {0}", type), 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;
}
}
private CqlRowSet ProcessRowset(IOutput outp)
{
bool ok = false;
try
{
if (outp is OutputError)
{
var ex = (outp as OutputError).CreateException();
_logger.Error(ex);
throw ex;
}
else if (outp is OutputVoid)
return new CqlRowSet(outp as OutputVoid, this);
else if (outp is OutputSchemaChange)
return new CqlRowSet(outp as OutputSchemaChange, this);
else if (outp is OutputSetKeyspace)
{
SetKeyspace(CqlQueryTools.CqlIdentifier((outp as OutputSetKeyspace).Value));
return new CqlRowSet(outp as OutputSetKeyspace, this);
}
else if (outp is OutputRows)
{
ok = true;
return new CqlRowSet(outp as OutputRows, this, true);
}
else
{
var ex = new DriverInternalError("Unexpected output kind");
_logger.Error(ex);
throw ex;
}
}
finally
{
if (!ok)
outp.Dispose();
}
}
/// <summary>
/// Switches to the specified keyspace.
/// </summary>
/// <param name="keyspace_name">Name of keyspace that is to be used.</param>
public void ChangeKeyspace(string keyspace_name)
{
lock (_connectionPool)
{
foreach (var kv in _connectionPool)
{
foreach (var conn in kv.Value)
{
if (conn.IsHealthy)
{
retry:
try
{
var keyspaceId = CqlQueryTools.CqlIdentifier(keyspace_name);
string retKeyspaceId;
try
{
retKeyspaceId = ProcessSetKeyspace(conn.Query(GetUseKeyspaceCQL(keyspace_name), ConsistencyLevel.Ignore,false));
}
catch (QueryValidationException)
{
_logger.Error("Cannot execute USE query. Query is invalid, unauthorized or syntactically incorrect.");
throw;
}
if (CqlQueryTools.CqlIdentifier(retKeyspaceId) != keyspaceId)
{
var ex = new DriverInternalError("USE query returned " + retKeyspaceId + ". We expected " + keyspaceId + ".");
_logger.Error(ex);
throw ex;
}
}
catch (Cassandra.CassandraConnection.StreamAllocationException)
{
_logger.Warning("Cannot allocate stream during keyspace change. Retrying..");
goto retry;
}
}
}
}
this._keyspace = keyspace_name;
_logger.Info("Changed keyspace to [" + this._keyspace + "]");
}
}
//private void ProcessRegisterForEvent(IOutput outp)
//{
// using (outp)
// {
// if (!(outp is OutputVoid))
// {
// if (outp is OutputError)
// {
// var ex = (outp as OutputError).CreateException();
// _logger.Error(ex);
// throw ex;
// }
// else
// {
// var ex = new DriverInternalError("Unexpected output kind: " + outp.GetType().Name);
// _logger.Error(ex);
// throw ex;
// }
// }
// else
// {
// _logger.Info("Checked register for event - ok");
// return; //ok
// }
// }
//}
private string ProcessSetKeyspace(IOutput outp)
{
using (outp)
{
if (outp is OutputError)
{
var ex = (outp as OutputError).CreateException();
_logger.Error(ex);
throw ex;
}
else if (outp is OutputSetKeyspace)
{
return (outp as OutputSetKeyspace).Value;
}
else
{
var ex = new DriverInternalError("Unexpected output kind");
_logger.Error(ex);
throw ex;
}
}
}
CassandraConnection AllocateConnection(IPAddress endPoint, out Exception outExc)
{
CassandraConnection nconn = null;
outExc = null;
try
{
nconn = new CassandraConnection(this, endPoint, _protocolOptions, _socketOptions, _clientOptions, _authProvider);
var options = nconn.ExecuteOptions();
if (!string.IsNullOrEmpty(_keyspace))
{
var keyspaceId = CqlQueryTools.CqlIdentifier(_keyspace);
string retKeyspaceId;
try
{
retKeyspaceId = ProcessSetKeyspace(nconn.Query(GetUseKeyspaceCQL(keyspaceId), ConsistencyLevel.Ignore,false));
}
catch (InvalidException)
{
throw;
}
catch (QueryValidationException)
{
return null;
}
if (CqlQueryTools.CqlIdentifier(retKeyspaceId) != CqlQueryTools.CqlIdentifier(keyspaceId))
{
var ex = new DriverInternalError("USE query returned " + retKeyspaceId + ". We expected " + keyspaceId + ".");
_logger.Error(ex);
throw ex;
}
lock(_preparedQueries)
foreach (var prepQ in _preparedQueries)
{
try
{
byte[] queryid;
RowSetMetadata metadata;
ProcessPrepareQuery(nconn.PrepareQuery(prepQ.Key), out metadata, out queryid);
}
catch (QueryValidationException)
{
return null;
}
//TODO: makesure that ids are equal;
}
}
}
catch (Exception ex)
{
if (nconn != null)
nconn.Dispose();
if (CassandraConnection.IsStreamRelatedException(ex))
{
outExc = ex;
return null;
}
else
throw ex;
}
_logger.Info("Allocated new connection");
return nconn;
}
private void ProcessPrepareQuery(IOutput outp, out RowSetMetadata metadata, out byte[] queryId)
{
using (outp)
{
if (outp is OutputError)
{
var ex = (outp as OutputError).CreateException();
_logger.Error(ex);
throw ex;
}
else if (outp is OutputPrepared)
{
queryId = (outp as OutputPrepared).QueryID;
metadata = (outp as OutputPrepared).Metadata;
_logger.Info("Prepared Query has been successfully processed.");
return; //ok
}
else
{
var ex = new DriverInternalError("Unexpected output kind");
_logger.Error("Prepared Query has returned an unexpected output kind.", ex);
throw ex;
}
}
}
private void conn_CassandraEvent(object sender, CassandraEventArgs e)
{
if (e is TopologyChangeEventArgs)
{
var tce = e as TopologyChangeEventArgs;
if (tce.What == TopologyChangeEventArgs.Reason.NewNode)
{
SetupControlConnection(true);
_cluster.Metadata.AddHost(tce.Address);
return;
}
else if (tce.What == TopologyChangeEventArgs.Reason.RemovedNode)
{
_cluster.Metadata.RemoveHost(tce.Address);
SetupControlConnection(!tce.Address.Equals(listeningOnHost));
return;
}
}
else if (e is StatusChangeEventArgs)
{
var sce = e as StatusChangeEventArgs;
if (sce.What == StatusChangeEventArgs.Reason.Up)
{
_cluster.Metadata.BringUpHost(sce.Address, this);
return;
}
else if (sce.What == StatusChangeEventArgs.Reason.Down)
{
_cluster.Metadata.SetDownHost(sce.Address, this);
return;
}
}
else if (e is SchemaChangeEventArgs)
{
var ssc = e as SchemaChangeEventArgs;
if (ssc.What == SchemaChangeEventArgs.Reason.Created)
{
SubmitSchemaRefresh(string.IsNullOrEmpty(ssc.Keyspace) ? null : ssc.Keyspace, null);
return;
}
else if (ssc.What == SchemaChangeEventArgs.Reason.Dropped)
{
SubmitSchemaRefresh(string.IsNullOrEmpty(ssc.Keyspace) ? null : ssc.Keyspace, null);
return;
}
else if (ssc.What == SchemaChangeEventArgs.Reason.Updated)
{
SubmitSchemaRefresh(ssc.Keyspace, string.IsNullOrEmpty(ssc.Table) ? null : ssc.Table);
return;
}
}
var ex = new DriverInternalError("Unknown Event");
_logger.Error(ex);
throw ex;
}
