在配置文件中定义自定义日志级别，并通过Java代码Log4J2访问它们

Question

I would like to define custom log levels in configurations file like below

<CustomLevels>
    <CustomLevel name="DIAG" intLevel="350" />
    <CustomLevel name="NOTICE" intLevel="450" />
    <CustomLevel name="VERBOSE" intLevel="550" />
</CustomLevels>

And i want to access them in Java Code like

Level diag = // get level defined in configuration
// and use them like this
logger.log(diag, "message");
// and then this 'message' is printed in the appender with thresholdfilter as diag

And then put a threshold filter on appender comparing with the level defined in configurations file...

Is this possible? And if yes, then how?

Answer 1

Define custom levels like this:

public static final Level DIAG = Level.forName("DIAG", 350)

So all you need is to read those levels in from the configurations file (on startup) and assigned them to some static variables.

Answer 2

This should do the job:

logger.log(Level.getLevel("DIAG"), "your message");

As stated in the log4j2 doc