org.apache.calcite.util.trace

Class CalciteLogger

java.lang.Object

org.apache.calcite.util.trace.CalciteLogger

public class CalciteLogger
extends Object

Small extension to Logger with some performance improvements.

Logger.log(Level level, String msg, Object[] params) is expensive to call, since the caller must always allocate and fill in the array params, even when level will prevent a message being logged. On the other hand, Logger.log(Level level, String msg) and Logger.log(Level level, String msg, Object) do not have this problem.

As a workaround this class provides log(Level, String msg, Object, Object) etc. (The varargs feature of java 1.5 half-solves this problem, by automatically wrapping args in an array, but it does so without testing the level.)

Usage: replace:

static final Logger tracer = CalciteTracer.getMyTracer();

by:

static final CalciteLogger tracer = new CalciteLogger(CalciteTrace.getMyTracer());

Constructor Summary

Constructors

Constructor and Description
CalciteLogger(Logger logger)

Method Summary

Methods

Modifier and Type	Method and Description
void	config(String msg)
void	fine(String msg)
void	finer(String msg)
void	finest(String msg)
Logger	getLogger()
void	info(String msg)
void	log(Level level, String msg)
void	log(Level level, String msg, Object param1)
void	log(Level level, String msg, Object[] params)
void	log(Level level, String msg, Object arg1, Object arg2) Conditionally logs a message with two Object parameters
void	log(Level level, String msg, Object arg1, Object arg2, Object arg3) Conditionally logs a message with three Object parameters
void	log(Level level, String msg, Object arg1, Object arg2, Object arg3, Object arg4) Conditionally logs a message with four Object parameters
void	log(Level level, String msg, Throwable thrown)
void	severe(String msg)
void	warning(String msg)

Methods inherited from class java.lang.Object

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

Constructor Detail

CalciteLogger

public CalciteLogger(Logger logger)

Method Detail

log

public void log(Level level,
       String msg,
       Object arg1,
       Object arg2)

Conditionally logs a message with two Object parameters

log

public void log(Level level,
       String msg,
       Object arg1,
       Object arg2,
       Object arg3)

Conditionally logs a message with three Object parameters

log

public void log(Level level,
       String msg,
       Object arg1,
       Object arg2,
       Object arg3,
       Object arg4)

Conditionally logs a message with four Object parameters

getLogger

public Logger getLogger()

log

public void log(Level level,
       String msg)

log

public void log(Level level,
       String msg,
       Object param1)

log

public void log(Level level,
       String msg,
       Object[] params)

log

public void log(Level level,
       String msg,
       Throwable thrown)

severe

public void severe(String msg)

warning

public void warning(String msg)

info

public void info(String msg)

config

public void config(String msg)

fine

public void fine(String msg)

finer

public void finer(String msg)

finest

public void finest(String msg)