org.apache.cassandra.tracing

Class Tracing

java.lang.Object

org.apache.cassandra.tracing.Tracing

public class Tracing
extends java.lang.Object

A trace session context. Able to track and store trace sessions. A session is usually a user initiated query, and may have multiple local and remote events before it is completed. All events and sessions are stored at keyspace.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	EVENTS_CF
static Tracing	instance
static java.lang.String	SESSIONS_CF
static java.lang.String	TRACE_HEADER
static java.lang.String	TRACE_KS

Constructor Summary

Constructors

Constructor and Description
Tracing()

Method Summary

Methods

Modifier and Type	Method and Description
static void	addColumn(ColumnFamily cf, CellName name, java.net.InetAddress address)
static void	addColumn(ColumnFamily cf, CellName name, int value)
static void	addColumn(ColumnFamily cf, CellName name, long value)
static void	addColumn(ColumnFamily cf, CellName name, java.lang.String value)
void	addParameterColumns(ColumnFamily cf, java.util.Map<java.lang.String,java.lang.String> rawPayload)
void	begin(java.lang.String request, java.util.Map<java.lang.String,java.lang.String> parameters)
static CellName	buildName(CFMetaData meta, java.lang.Object... args)
void	doneWithNonLocalSession(TraceState state)
TraceState	get()
TraceState	get(java.util.UUID sessionId)
java.util.UUID	getSessionId()
TraceState	initializeFromMessage(MessageIn<?> message) Determines the tracing context from a message.
static boolean	isTracing() Indicates if the current thread's execution is being traced.
java.util.UUID	newSession()
java.util.UUID	newSession(java.util.UUID sessionId)
void	set(TraceState tls)
void	stopSession() Stop the session and record its complete.
static void	trace(java.lang.String message)
static void	trace(java.lang.String format, java.lang.Object arg)
static void	trace(java.lang.String format, java.lang.Object[] args)
static void	trace(java.lang.String format, java.lang.Object arg1, java.lang.Object arg2)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TRACE_KS

public static final java.lang.String TRACE_KS

See Also:

Constant Field Values

EVENTS_CF

public static final java.lang.String EVENTS_CF

See Also:

Constant Field Values

SESSIONS_CF

public static final java.lang.String SESSIONS_CF

See Also:

Constant Field Values

TRACE_HEADER

public static final java.lang.String TRACE_HEADER

See Also:

Constant Field Values

instance

public static final Tracing instance

Constructor Detail

Tracing

public Tracing()

Method Detail

addColumn

public static void addColumn(ColumnFamily cf,
             CellName name,
             java.net.InetAddress address)

addColumn

public static void addColumn(ColumnFamily cf,
             CellName name,
             int value)

addColumn

public static void addColumn(ColumnFamily cf,
             CellName name,
             long value)

addColumn

public static void addColumn(ColumnFamily cf,
             CellName name,
             java.lang.String value)

addParameterColumns

public void addParameterColumns(ColumnFamily cf,
                       java.util.Map<java.lang.String,java.lang.String> rawPayload)

buildName

public static CellName buildName(CFMetaData meta,
                 java.lang.Object... args)

getSessionId

public java.util.UUID getSessionId()

isTracing

public static boolean isTracing()

Indicates if the current thread's execution is being traced.

newSession

public java.util.UUID newSession()

newSession

public java.util.UUID newSession(java.util.UUID sessionId)

doneWithNonLocalSession

public void doneWithNonLocalSession(TraceState state)

stopSession

public void stopSession()

Stop the session and record its complete. Called by coodinator when request is complete.

get

public TraceState get()

get

public TraceState get(java.util.UUID sessionId)

set

public void set(TraceState tls)

begin

public void begin(java.lang.String request,
         java.util.Map<java.lang.String,java.lang.String> parameters)

initializeFromMessage

public TraceState initializeFromMessage(MessageIn<?> message)

Determines the tracing context from a message. Does NOT set the threadlocal state.

Parameters:

message - The internode message

trace

public static void trace(java.lang.String message)

trace

public static void trace(java.lang.String format,
         java.lang.Object arg)

trace

public static void trace(java.lang.String format,
         java.lang.Object arg1,
         java.lang.Object arg2)

trace

public static void trace(java.lang.String format,
         java.lang.Object[] args)