Package 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());

Constructor Summary

Constructors

Constructor	Description
CalciteLogger(org.slf4j.Logger logger)

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Details

CalciteLogger

public CalciteLogger(org.slf4j.Logger logger)

Method Details

warn

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

Logs a WARN message with two Object parameters.

warn

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

Conditionally logs a WARN message with three Object parameters.

warn

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

Logs an INFO message with two Object parameters.

info

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

Conditionally logs an INFO message with three Object parameters.

info

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

Logs a DEBUG message with two Object parameters.

debug

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

Conditionally logs a DEBUG message with three Object parameters.

debug

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

Logs a TRACE message with two Object parameters.

trace

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

Conditionally logs a TRACE message with three Object parameters.

trace

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

Conditionally logs a TRACE message with four Object parameters.

trace

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

getLogger

public org.slf4j.Logger getLogger()

warn

public void warn(String msg)

info

public void info(String msg)