org.springframework.core.log

Class CompositeLog

java.lang.Object

org.springframework.core.log.CompositeLog

All Implemented Interfaces:

Log

final class CompositeLog
extends java.lang.Object
implements Log

Implementation of Log that wraps a list of loggers and delegates to the first one for which logging is enabled at the given level.

Since:

5.1

Author:

Rossen Stoyanchev

See Also:

LogDelegateFactory.getCompositeLog(org.apache.commons.logging.Log, org.apache.commons.logging.Log, org.apache.commons.logging.Log...)

Field Summary

Fields

Modifier and Type	Field and Description
private Log	debugLogger
private Log	errorLogger
private Log	fatalLogger
private Log	infoLogger
private static Log	NO_OP_LOG
private Log	traceLogger
private Log	warnLogger

Constructor Summary

Constructors

Constructor and Description
CompositeLog(java.util.List<Log> loggers) Constructor with list of loggers.

Method Summary

Modifier and Type	Method and Description
void	debug(java.lang.Object message) Logs a message with debug log level.
void	debug(java.lang.Object message, java.lang.Throwable ex) Logs an error with debug log level.
void	error(java.lang.Object message) Logs a message with error log level.
void	error(java.lang.Object message, java.lang.Throwable ex) Logs an error with error log level.
void	fatal(java.lang.Object message) Logs a message with fatal log level.
void	fatal(java.lang.Object message, java.lang.Throwable ex) Logs an error with fatal log level.
void	info(java.lang.Object message) Logs a message with info log level.
void	info(java.lang.Object message, java.lang.Throwable ex) Logs an error with info log level.
private static Log	initLogger(java.util.List<Log> loggers, java.util.function.Predicate<Log> predicate)
boolean	isDebugEnabled() Is debug logging currently enabled?
boolean	isErrorEnabled() Is error logging currently enabled?
boolean	isFatalEnabled() Is fatal logging currently enabled?
boolean	isInfoEnabled() Is info logging currently enabled?
boolean	isTraceEnabled() Is trace logging currently enabled?
boolean	isWarnEnabled() Is warn logging currently enabled?
void	trace(java.lang.Object message) Logs a message with trace log level.
void	trace(java.lang.Object message, java.lang.Throwable ex) Logs an error with trace log level.
void	warn(java.lang.Object message) Logs a message with warn log level.
void	warn(java.lang.Object message, java.lang.Throwable ex) Logs an error with warn log level.

Methods inherited from class java.lang.Object

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

Field Detail

NO_OP_LOG

private static final Log NO_OP_LOG

fatalLogger

private final Log fatalLogger

errorLogger

private final Log errorLogger

warnLogger

private final Log warnLogger

infoLogger

private final Log infoLogger

debugLogger

private final Log debugLogger

traceLogger

private final Log traceLogger

Constructor Detail

CompositeLog

public CompositeLog(java.util.List<Log> loggers)

Constructor with list of loggers. For optimal performance, the constructor checks and remembers which logger is on for each log category.

Parameters:

loggers - the loggers to use

Method Detail

initLogger

private static Log initLogger(java.util.List<Log> loggers,
                              java.util.function.Predicate<Log> predicate)

isFatalEnabled

public boolean isFatalEnabled()

Description copied from interface: Log

Is fatal logging currently enabled?

Call this method to prevent having to perform expensive operations (for example, String concatenation) when the log level is more than fatal.

Specified by:

isFatalEnabled in interface Log

Returns:

true if fatal is enabled in the underlying logger.

isErrorEnabled

public boolean isErrorEnabled()

Description copied from interface: Log

Is error logging currently enabled?

Call this method to prevent having to perform expensive operations (for example, String concatenation) when the log level is more than error.

Specified by:

isErrorEnabled in interface Log

Returns:

true if error is enabled in the underlying logger.

isWarnEnabled

public boolean isWarnEnabled()

Description copied from interface: Log

Is warn logging currently enabled?

Call this method to prevent having to perform expensive operations (for example, String concatenation) when the log level is more than warn.

Specified by:

isWarnEnabled in interface Log

Returns:

true if warn is enabled in the underlying logger.

isInfoEnabled

public boolean isInfoEnabled()

Description copied from interface: Log

Is info logging currently enabled?

Call this method to prevent having to perform expensive operations (for example, String concatenation) when the log level is more than info.

Specified by:

isInfoEnabled in interface Log

Returns:

true if info is enabled in the underlying logger.

isDebugEnabled

public boolean isDebugEnabled()

Description copied from interface: Log

Is debug logging currently enabled?

Call this method to prevent having to perform expensive operations (for example, String concatenation) when the log level is more than debug.

Specified by:

isDebugEnabled in interface Log

Returns:

true if debug is enabled in the underlying logger.

isTraceEnabled

public boolean isTraceEnabled()

Description copied from interface: Log

Is trace logging currently enabled?

Call this method to prevent having to perform expensive operations (for example, String concatenation) when the log level is more than trace.

Specified by:

isTraceEnabled in interface Log

Returns:

true if trace is enabled in the underlying logger.

fatal

public void fatal(java.lang.Object message)

Description copied from interface: Log

Logs a message with fatal log level.

Specified by:

fatal in interface Log

Parameters:

message - log this message

fatal

public void fatal(java.lang.Object message,
                  java.lang.Throwable ex)

Description copied from interface: Log

Logs an error with fatal log level.

Specified by:

fatal in interface Log

Parameters:

message - log this message

ex - log this cause

error

public void error(java.lang.Object message)

Description copied from interface: Log

Logs a message with error log level.

Specified by:

error in interface Log

Parameters:

message - log this message

error

public void error(java.lang.Object message,
                  java.lang.Throwable ex)

Description copied from interface: Log

Logs an error with error log level.

Specified by:

error in interface Log

Parameters:

message - log this message

ex - log this cause

warn

public void warn(java.lang.Object message)

Description copied from interface: Log

Logs a message with warn log level.

Specified by:

warn in interface Log

Parameters:

message - log this message

warn

public void warn(java.lang.Object message,
                 java.lang.Throwable ex)

Description copied from interface: Log

Logs an error with warn log level.

Specified by:

warn in interface Log

Parameters:

message - log this message

ex - log this cause

info

public void info(java.lang.Object message)

Description copied from interface: Log

Logs a message with info log level.

Specified by:

info in interface Log

Parameters:

message - log this message

info

public void info(java.lang.Object message,
                 java.lang.Throwable ex)

Description copied from interface: Log

Logs an error with info log level.

Specified by:

info in interface Log

Parameters:

message - log this message

ex - log this cause

debug

public void debug(java.lang.Object message)

Description copied from interface: Log

Logs a message with debug log level.

Specified by:

debug in interface Log

Parameters:

message - log this message

debug

public void debug(java.lang.Object message,
                  java.lang.Throwable ex)

Description copied from interface: Log

Logs an error with debug log level.

Specified by:

debug in interface Log

Parameters:

message - log this message

ex - log this cause

trace

public void trace(java.lang.Object message)

Description copied from interface: Log

Logs a message with trace log level.

Specified by:

trace in interface Log

Parameters:

message - log this message

trace

public void trace(java.lang.Object message,
                  java.lang.Throwable ex)

Description copied from interface: Log

Logs an error with trace log level.

Specified by:

trace in interface Log

Parameters:

message - log this message

ex - log this cause