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

As a workaround this class provides info(String msg, Object o1, Object o2) 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());

Field Summary

Fields

Modifier and Type	Field and Description
private org.slf4j.Logger	logger

Constructor Summary

Constructors

Constructor and Description
CalciteLogger(org.slf4j.Logger logger)

Method Summary

Modifier and Type	Method and Description
void	debug(String format, Object... args)
void	debug(String format, Object arg1, Object arg2) Logs a DEBUG message with two Object parameters
void	debug(String format, Object arg1, Object arg2, Object arg3) Conditionally logs a DEBUG message with three Object parameters
void	debug(String format, Object arg1, Object arg2, Object arg3, Object arg4) Conditionally logs a DEBUG message with four Object parameters
org.slf4j.Logger	getLogger()
void	info(String msg)
void	info(String format, Object... args)
void	info(String format, Object arg1, Object arg2) Logs an INFO message with two Object parameters
void	info(String format, Object arg1, Object arg2, Object arg3) Conditionally logs an INFO message with three Object parameters
void	info(String format, Object arg1, Object arg2, Object arg3, Object arg4) Conditionally logs an INFO message with four Object parameters
void	trace(String format, Object... args)
void	trace(String format, Object arg1, Object arg2) Logs a TRACE message with two Object parameters
void	trace(String format, Object arg1, Object arg2, Object arg3) Conditionally logs a TRACE message with three Object parameters
void	trace(String format, Object arg1, Object arg2, Object arg3, Object arg4) Conditionally logs a TRACE message with four Object parameters
void	warn(String msg)
void	warn(String format, Object... args)
void	warn(String format, Object arg1, Object arg2) Logs a WARN message with two Object parameters
void	warn(String format, Object arg1, Object arg2, Object arg3) Conditionally logs a WARN message with three Object parameters
void	warn(String format, Object arg1, Object arg2, Object arg3, Object arg4) Conditionally logs a WARN message with four Object parameters

Methods inherited from class java.lang.Object

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

Field Detail

logger

private final org.slf4j.Logger logger

Constructor Detail

CalciteLogger

public CalciteLogger(org.slf4j.Logger logger)

Method Detail

warn

public void warn(String format,
                 Object arg1,
                 Object arg2)

Logs a WARN message with two Object parameters

warn

public void warn(String format,
                 Object arg1,
                 Object arg2,
                 Object arg3)

Conditionally logs a WARN message with three Object parameters

warn

public void warn(String format,
                 Object arg1,
                 Object arg2,
                 Object arg3,
                 Object arg4)

Conditionally logs a WARN message with four Object parameters

warn

public void warn(String format,
                 Object... args)

info

public void info(String format,
                 Object arg1,
                 Object arg2)

Logs an INFO message with two Object parameters

info

public void info(String format,
                 Object arg1,
                 Object arg2,
                 Object arg3)

Conditionally logs an INFO message with three Object parameters

info

public void info(String format,
                 Object arg1,
                 Object arg2,
                 Object arg3,
                 Object arg4)

Conditionally logs an INFO message with four Object parameters

info

public void info(String format,
                 Object... args)

debug

public void debug(String format,
                  Object arg1,
                  Object arg2)

Logs a DEBUG message with two Object parameters

debug

public void debug(String format,
                  Object arg1,
                  Object arg2,
                  Object arg3)

Conditionally logs a DEBUG message with three Object parameters

debug

public void debug(String format,
                  Object arg1,
                  Object arg2,
                  Object arg3,
                  Object arg4)

Conditionally logs a DEBUG message with four Object parameters

debug

public void debug(String format,
                  Object... args)

trace

public void trace(String format,
                  Object arg1,
                  Object arg2)

Logs a TRACE message with two Object parameters

trace

public void trace(String format,
                  Object arg1,
                  Object arg2,
                  Object arg3)

Conditionally logs a TRACE message with three Object parameters

trace

public void trace(String format,
                  Object arg1,
                  Object arg2,
                  Object arg3,
                  Object arg4)

Conditionally logs a TRACE message with four Object parameters

trace

public void trace(String format,
                  Object... args)

getLogger

public org.slf4j.Logger getLogger()

warn

public void warn(String msg)

info

public void info(String msg)