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Posted to log4j-dev@logging.apache.org by "Remko Popma (JIRA)" <ji...@apache.org> on 2014/10/03 00:48:34 UTC
[jira] [Updated] (LOG4J2-865) How to change level in LoggerConfig
and AppenderControl programmatically
[ https://issues.apache.org/jira/browse/LOG4J2-865?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Remko Popma updated LOG4J2-865:
-------------------------------
Summary: How to change level in LoggerConfig and AppenderControl programmatically (was: Changing level in LoggerConfig does not change AppenderControl and does not allow messages at new log level to be logged)
> How to change level in LoggerConfig and AppenderControl programmatically
> ------------------------------------------------------------------------
>
> Key: LOG4J2-865
> URL: https://issues.apache.org/jira/browse/LOG4J2-865
> Project: Log4j 2
> Issue Type: Bug
> Components: Appenders, Configurators
> Affects Versions: 2.0.2
> Environment: Windows7 64bit, Eclipse, Maven
> Reporter: Andrew Herr
> Fix For: 2.0.2
>
>
> I am wrapping log4j2 in order to replace the logging backend used in house, so I am configuring the logger and appenders at runtime with calls to the Context, Configuration, and LoggerConfig. I'd like to change the log level on the fly, so I get the LoggerConfig for my named logger and call setLevel(Level) on it, and then updateLoggers in the context. New messages at the new (less severe) level are not logged. Through a debug session, I can see that the level in LoggerConfig is correctly updated, but the AppenderControl still has the old level, so callAppenders denies my event from being logged.
> Code:
> Set up the logger + RollingFileAppender
> name = logName;
> level = logLevel;
> LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
> Configuration config = ctx.getConfiguration();
>
> LoggerConfig loggerConfig = new LoggerConfig(name, level, false);
> PatternLayout layout = PatternLayout.createLayout(PatternLayout.SIMPLE_CONVERSION_PATTERN, config, null, null, true, false, null, null);
>
> OnStartupTriggeringPolicy startupTrigger = OnStartupTriggeringPolicy.createPolicy();
> SizeBasedTriggeringPolicy sizeTrigger = SizeBasedTriggeringPolicy.createPolicy("25MB");
> TriggeringPolicy triggerPolicy = CompositeTriggeringPolicy.createPolicy(startupTrigger, sizeTrigger);
> DefaultRolloverStrategy rolloverStrategy = DefaultRolloverStrategy.createStrategy("5", "1", "min", null, config);
> RollingFileAppender rollingFileAppender = RollingFileAppender.createAppender(name + ".log", name + ".log.%i", "true", "RollingFile",
> "true", "8192", "true", triggerPolicy, rolloverStrategy, layout, null, "true", "false", null, config);
> rollingFileAppender.start();
> loggerConfig.addAppender(rollingFileAppender, level, null);
> config.addLogger(name, loggerConfig);
> ctx.updateLoggers();
> update the level:
> LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
> Configuration config = ctx.getConfiguration();
> LoggerConfig loggerConfig = config.getLoggerConfig(name);
> loggerConfig.setLevel(logLevel);
> ctx.updateLoggers();
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