org.apache.hadoop.fs.s3a.impl.logging

Class LogControl

java.lang.Object

org.apache.hadoop.fs.s3a.impl.logging.LogControl

public abstract class LogControl
extends Object

class to assist reflection-based control of logger back ends.

An instance of LogControl is able to control the log levels of loggers for log libraries such as Log4j, yet can be created in code designed to support multiple back end loggers behind SLF4J.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	LogControl.LogLevel Enumeration of log levels.

Constructor Summary

Constructors

Constructor and Description
LogControl()

Method Summary

Modifier and Type	Method and Description
protected abstract boolean	setLevel(String log, LogControl.LogLevel level) Sets a log level for a class/package.
boolean	setLogLevel(String log, LogControl.LogLevel level) Sets a log level for a class/package.

Methods inherited from class java.lang.Object

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

Constructor Detail

LogControl

public LogControl()

Method Detail

setLogLevel

public final boolean setLogLevel(String log,
                                 LogControl.LogLevel level)

Sets a log level for a class/package.

Parameters:

log - log to set

level - level to set

Returns:

true if the log was set

setLevel

protected abstract boolean setLevel(String log,
                                    LogControl.LogLevel level)
                             throws Exception

Sets a log level for a class/package. Exceptions may be raised; they will be caught in setLogLevel(String, LogLevel) and ignored.

Parameters:

log - log to set

level - level to set

Returns:

true if the log was set

Throws:

Exception - any problem loading/updating the log