log4j2中的自定义日志级别问题

Question

Root logger is configured to be a synchronous logger at INFO level. I also have a couple of Async loggers. One of the Async logger is configured at a customized higher log level TOAST (789). This is higher than the TRACE level (600).

The reason for doing this is to have a log level that can be used for special events to be logged via Async logger and their own appenders.

We dont want the TOAST events to be going to the Synchronous Root loggers or other loggers.. but only to the Async TOAST logger and its corresponding appenders .. is it possible?

<?xml version="1.0" encoding="UTF-8"?>
<Configuration monitorInterval="120" packages=“com.pack.toast”>
     <CustomLevels>
        <CustomLevel name=“TOAST” intLevel=“789” />
    </CustomLevels>

    <Appenders>
        <RollingFile fileName="${sys:catalina.base}/logs/packiu.log"
            append="true" name="DRFILE"
            filePattern="${sys:catalina.base}/logs/packiu-%d{yyyy-MM-dd}-%i.log">
            <PatternLayout>
                <Pattern>%d [%t] %c %M - %p: %m%n</Pattern>
            </PatternLayout>
            <Policies>
                <OnStartupTriggeringPolicy />
                <SizeBasedTriggeringPolicy size="10 MB" />
            </Policies>
            <DefaultRolloverStrategy max="30" />
        </RollingFile>          
        <RollingFile name="RollingFile" fileName="/Users/toasty/logs/roll_file_app.log"
                     filePattern="logs/app-%d{MM-dd-yyyy}.log.gz" immediateFlush="true" >
               <PatternLayout>
                        <pattern>%m%n</pattern>
              </PatternLayout>
              <TimeBasedTriggeringPolicy />
        </RollingFile>
        <Rewrite name="Rewrite" ignoreExceptions = "true"  >
            <ToastAppenderPolicy toastNeeded="true">
            </ToastAppenderPolicy>
            <AppenderRef ref="RollingFile"/>
        </Rewrite>

    </Appenders>
    <Loggers>
        <Logger name="net.rubyeye" level="off" />
        <Logger name="com.google.code" level="off" />               

        <AsyncLogger name="com.pack.toast.ToastLoggerImpl" level=“TOAST” includeLocation="true">
            <AppenderRef ref="Rewrite" />
        </AsyncLogger>

        <Root level="info">
            <AppenderRef ref="DRFILE" />
        </Root>

    </Loggers>
</Configuration>

Answer 1

It sounds to me like you really want a named logger not a custom level because you only ever want your messages to go to one logger and its appenders. Perhaps you should use something more like:

<AsyncLogger name="TOAST_LOGGER" level=“INFO” includeLocation="true">
    <AppenderRef ref="Rewrite" />
</AsyncLogger>

and then in your code

private static final Logger TOAST_LOGGER = LogManager.getLogger("TOAST_LOGGER");
...
TOAST_LOGGER.info("Toast message");
...

Otherwise, if you must use a custom log level then you can accomplish what you want by filtering with a Threshold Filter .