Java example source code file (PlatformLoggingMXBean.java)

This example Java source code file (PlatformLoggingMXBean.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

platformloggingmxbean, platformmanagedobject, string

The PlatformLoggingMXBean.java Java example source code

/*
 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package java.lang.management;

/**
 * The management interface for the {@linkplain java.util.logging logging} facility.
 *
 * <p>There is a single global instance of the PlatformLoggingMXBean.
 * The {@link java.lang.management.ManagementFactory#getPlatformMXBean(Class)
 * ManagementFactory.getPlatformMXBean} method can be used to obtain
 * the {@code PlatformLoggingMXBean} object as follows:
 * <pre>
 *     PlatformLoggingMXBean logging = ManagementFactory.getPlatformMXBean(PlatformLoggingMXBean.class);
 * </pre>
 * The {@code PlatformLoggingMXBean} object is also registered with the
 * platform {@linkplain java.lang.management.ManagementFactory#getPlatformMBeanServer
 * MBeanServer}.
 * The {@link javax.management.ObjectName ObjectName} for uniquely
 * identifying the {@code PlatformLoggingMXBean} within an MBeanServer is:
 * <pre>
 *      {@link java.util.logging.LogManager#LOGGING_MXBEAN_NAME java.util.logging:type=Logging}
 * </pre>
 *
 * <p>The instance registered in the platform MBeanServer with
 * this {@code ObjectName} implements all attributes defined by
 * {@link java.util.logging.LoggingMXBean}.
 *
 * @since   1.7
 */
public interface PlatformLoggingMXBean extends PlatformManagedObject {

    /**
     * Returns the list of the currently registered
     * {@linkplain java.util.logging.Logger logger} names. This method
     * calls {@link java.util.logging.LogManager#getLoggerNames} and
     * returns a list of the logger names.
     *
     * @return A list of {@code String} each of which is a
     *         currently registered {@code Logger} name.
     */
    java.util.List<String> getLoggerNames();

    /**
     * Gets the name of the log {@linkplain java.util.logging.Logger#getLevel
     * level} associated with the specified logger.
     * If the specified logger does not exist, {@code null}
     * is returned.
     * This method first finds the logger of the given name and
     * then returns the name of the log level by calling:
     * <blockquote>
     *   {@link java.util.logging.Logger#getLevel
     *    Logger.getLevel()}.{@link java.util.logging.Level#getName getName()};
     * </blockquote>
     *
     * <p>
     * If the {@code Level} of the specified logger is {@code null},
     * which means that this logger's effective level is inherited
     * from its parent, an empty string will be returned.
     *
     * @param loggerName The name of the {@code Logger} to be retrieved.
     *
     * @return The name of the log level of the specified logger; or
     *         an empty string if the log level of the specified logger
     *         is {@code null}.  If the specified logger does not
     *         exist, {@code null} is returned.
     *
     * @see java.util.logging.Logger#getLevel
     */
    String getLoggerLevel(String loggerName);

    /**
     * Sets the specified logger to the specified new
     * {@linkplain java.util.logging.Logger#setLevel level}.
     * If the {@code levelName} is not {@code null}, the level
     * of the specified logger is set to the parsed
     * {@link java.util.logging.Level Level}
     * matching the {@code levelName}.
     * If the {@code levelName} is {@code null}, the level
     * of the specified logger is set to {@code null} and
     * the effective level of the logger is inherited from
     * its nearest ancestor with a specific (non-null) level value.
     *
     * @param loggerName The name of the {@code Logger} to be set.
     *                   Must be non-null.
     * @param levelName The name of the level to set on the specified logger,
     *                 or  {@code null} if setting the level to inherit
     *                 from its nearest ancestor.
     *
     * @throws IllegalArgumentException if the specified logger
     * does not exist, or {@code levelName} is not a valid level name.
     *
     * @throws SecurityException if a security manager exists and if
     * the caller does not have LoggingPermission("control").
     *
     * @see java.util.logging.Logger#setLevel
     */
    void setLoggerLevel(String loggerName, String levelName);

    /**
     * Returns the name of the
     * {@linkplain java.util.logging.Logger#getParent parent}
     * for the specified logger.
     * If the specified logger does not exist, {@code null} is returned.
     * If the specified logger is the root {@code Logger} in the namespace,
     * the result will be an empty string.
     *
     * @param loggerName The name of a {@code Logger}.
     *
     * @return 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, {@code null}
     *         is returned.
     */
    String getParentLoggerName(String loggerName);
}