uk.ac.starlink.util

Class LogUtils

java.lang.Object

uk.ac.starlink.util.LogUtils

public class LogUtils
extends Object

Utilities for working with logging.

Since:

20 Jul 2022

Author:

Mark Taylor

Method Summary

Modifier and Type	Method and Description
static Logger	getLogger(String name) Returns the logger for a given name, retaining a reference to that logger.

Methods inherited from class java.lang.Object

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

Method Detail

getLogger

public static Logger getLogger(String name)

Returns the logger for a given name, retaining a reference to that logger.

The output is the same as Logger.getLogger(java.lang.String), for which it is a drop-in replacement, but because a reference is retained by this class, the returned object will not be subsequently garbage collected; as noted in the Logger javadocs:

"It is important to note that the Logger returned by one of the getLogger factory methods may be garbage collected at any time if a strong reference to the Logger is not kept."

So if you want to modify one of the loggers in the logging hierarchy, you can do it like:

    LogUtils.getLogger("a.b.c").setLevel(Level.WARNING)
 

If you make the corresponding call using Logger.getLogger, the logger may have been garbage collected and recreated without the desired configuration by the time it's actually used to log something.

Parameters:

name - logger name

Returns:

logger

See Also:

Logger.getLogger(java.lang.String)