Java Logging: LogManager

The

java.util.logging.LogManager

manages the internal

Logger

hierarchy, and initiates the configuration of the

Logger

's, either through the configuration class or configuration file.

There is only a single

LogManager

instantiated in the whole JVM. It is a singleton, in other words. Here is how to obtain the

LogManager

instance:

LogManager manager = LogManager.getLogManager();

　　

You will not often need to interact directly with the

LogManager

, except for a few borderline cases.

For instance, if you want to reload the configuration file, you can do so using either of these methods:

readConfiguration();

readConfiguration(inputStream);

　　

The first method on the

LogManager

simply re-reads the configuration from file (or class), in case these has changed.

The second method on the

LogManager

simply reads the configuration from the given

InputStream

.

You can also get access to an MXBean (Java Management Extensions) from the

LogManager

using the method

getLoggingMXBean()

. Here is an example:

LoggingMXBean mxBean = logManager.getLoggingMXBean();

　　

The

LogManager

has more methods than these two, but most often you will not need them. Check the official JavaDoc for more information, if you need to do something not covered here.