PlatformLoggingMXBean (Java SE 9 & JDK 9 )
Keywords: java.lang.management.PlatformLoggingMXBean interface

Module java.management
Package java.lang.management

## Interface PlatformLoggingMXBean

- All Superinterfaces:
    `PlatformManagedObject`

      public interface PlatformLoggingMXBean
      extends PlatformManagedObject

  The management interface for the logging facility.

  There is a single global instance of the `PlatformLoggingMXBean`. The `ManagementFactory.getPlatformMXBean` method can be used to obtain the `PlatformLoggingMXBean` object as follows:

           PlatformLoggingMXBean logging = ManagementFactory.getPlatformMXBean(PlatformLoggingMXBean.class);

  The `PlatformLoggingMXBean` object is also registered with the platform MBeanServer. The `ObjectName` for uniquely identifying the `PlatformLoggingMXBean` within an MBeanServer is:

            java.util.logging:type=Logging

  Since:
    1.7

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `String` | `getLoggerLevel​(String loggerName)` | Gets the name of the log level associated with the specified logger.
    `List<String>` | `getLoggerNames​()` | Returns the list of the currently registered logger names.
    `String` | `getParentLoggerName​(String loggerName)` | Returns the name of the parent for the specified logger.
    `void` | `setLoggerLevel​(String loggerName, String levelName)` | Sets the specified logger to the specified new level.

    - ### Methods inherited from interface java.lang.management.PlatformManagedObject

      `getObjectName`

- - ### Method Detail

    - #### getLoggerNames

          List<String> getLoggerNames​()

      Returns the list of the currently registered logger names. This method calls `LogManager.getLoggerNames()` and returns a list of the logger names.
      Returns:
        A list of `String` each of which is a currently registered `Logger` name.

    - #### getLoggerLevel

          String getLoggerLevel​(String loggerName)

      Gets the name of the log level associated with the specified logger. If the specified logger does not exist, `null` is returned. This method first finds the logger of the given name and then returns the name of the log level by calling:

      > `Logger.getLevel()`.`getName()`;

      If the `Level` of the specified logger is `null`, which means that this logger's effective level is inherited from its parent, an empty string will be returned.

      Parameters:
        `loggerName` - The name of the `Logger` to be retrieved.
      Returns:
        The name of the log level of the specified logger; or an empty string if the log level of the specified logger is `null`. If the specified logger does not exist, `null` is returned.
      See Also:
        `Logger.getLevel()`

    - #### setLoggerLevel

          void setLoggerLevel​(String loggerName,
                              String levelName)

      Sets the specified logger to the specified new level. If the `levelName` is not `null`, the level of the specified logger is set to the parsed `Level` matching the `levelName`. If the `levelName` is `null`, the level of the specified logger is set to `null` and the effective level of the logger is inherited from its nearest ancestor with a specific (non-null) level value.
      Parameters:
        `loggerName` - The name of the `Logger` to be set. Must be non-null.
        `levelName` - The name of the level to set on the specified logger, or `null` if setting the level to inherit from its nearest ancestor.
      Throws:
        `IllegalArgumentException` - if the specified logger does not exist, or `levelName` is not a valid level name.
        `SecurityException` - if a security manager exists and if the caller does not have LoggingPermission("control").
      See Also:
        `Logger.setLevel(java.util.logging.Level)`

    - #### getParentLoggerName

          String getParentLoggerName​(String loggerName)

      Returns the name of the parent for the specified logger. If the specified logger does not exist, `null` is returned. If the specified logger is the root `Logger` in the namespace, the result will be an empty string.
      Parameters:
        `loggerName` - The name of a `Logger`.
      Returns:
        the name of the nearest existing parent logger; an empty string if the specified logger is the root logger. If the specified logger does not exist, `null` is returned.