Class QueryTrace

The Cassandra trace for a query.

The trace is generated by Cassandra when query tracing is enabled for the query. The trace itself is stored in Cassandra in the sessions and events table in the system_traces keyspace and can be retrieve manually using the trace identifier (the one returned by TraceId).

Inheritance

object

QueryTrace

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

Namespace: Cassandra

Assembly: Cassandra.dll

Syntax

public class QueryTrace

Constructors

QueryTrace(Guid, ISession)

Declaration

public QueryTrace(Guid traceId, ISession session)

Parameters

Type	Name	Description
Guid	traceId
ISession	session

Properties

ClientAddress

Source address of the query.

Declaration

public IPAddress ClientAddress { get; }

Property Value

Type	Description
IPAddress

Coordinator

The coordinator host of the query.

Declaration

public IPAddress Coordinator { get; }

Property Value

Type	Description
IPAddress	The coordinator host of the query. This method returns null if the coordinator is not yet available.

DurationMicros

The (server side) duration of the query in microseconds.

Declaration

public int DurationMicros { get; }

Property Value

Type	Description
int	The (server side) duration of the query in microseconds. This method will return Int32.MinValue if the duration is not yet available.

Events

The events contained in this trace.

Declaration

public List<QueryTrace.Event> Events { get; }

Property Value

Type	Description
List<QueryTrace.Event>	The events contained in this trace.

Parameters

The parameters attached to this trace.

Declaration

public IDictionary<string, string> Parameters { get; }

Property Value

Type	Description
IDictionary<string, string>	The parameters attached to this trace. This method returns null if the coordinator is not yet available.

RequestType

The type of request.

Declaration

public string RequestType { get; }

Property Value

Type	Description
string	the type of request. This method returns null if the request type is not yet available.

StartedAt

The server side timestamp of the start of this query.

Declaration

public long StartedAt { get; }

Property Value

Type	Description
long	The server side timestamp of the start of this query. This method returns 0 if the start timestamp is not available.

TraceId

The identifier of this trace.

Declaration

public Guid TraceId { get; }

Property Value

Type	Description
Guid	the identifier of this trace.

Methods

ToString()

Declaration

public override string ToString()

Returns

Type	Description
string

Overrides

object.ToString()