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Java example source code file (

This example Java source code file ( is included in the "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

appender, enumeration, level, logger, loggerfactory, loggerrepository, suppresswarnings, util

The Java example source code

 * Copyright 2001-2004 The Apache Software Foundation.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.apache.log4j.spi;

import org.apache.log4j.*;

import java.util.Enumeration;

 * A <code>LoggerRepository is used to create and retrieve
 * <code>Loggers. The relation between loggers in a repository
 * depends on the repository but typically loggers are arranged in a
 * named hierarchy.
 * <p/>
 * <p>In addition to the creational methods, a
 * <code>LoggerRepository can be queried for existing loggers,
 * can act as a point of registry for events related to loggers.
 * @author Ceki Gülcü
 * @since 1.2
public interface LoggerRepository {

     * Add a {@link HierarchyEventListener} event to the repository.
    public void addHierarchyEventListener(HierarchyEventListener listener);

     * Returns whether this repository is disabled for a given
     * level. The answer depends on the repository threshold and the
     * <code>level parameter. See also {@link #setThreshold}
     * method.
    boolean isDisabled(int level);

     * Set the repository-wide threshold. All logging requests below the
     * threshold are immediately dropped. By default, the threshold is
     * set to <code>Level.ALL which has the lowest possible rank.
    public void setThreshold(Level level);

     * Another form of {@link #setThreshold(Level)} accepting a string
     * parameter instead of a <code>Level.
    public void setThreshold(String val);

    public void emitNoAppenderWarning(Category cat);

     * Get the repository-wide threshold. See {@link
     * #setThreshold(Level)} for an explanation.
    public Level getThreshold();

    public Logger getLogger(String name);

    public Logger getLogger(String name, LoggerFactory factory);

    public Logger getRootLogger();

    public abstract Logger exists(String name);

    public abstract void shutdown();

    public Enumeration getCurrentLoggers();

     * Deprecated. Please use {@link #getCurrentLoggers} instead.
    public Enumeration getCurrentCategories();

    public abstract void fireAddAppenderEvent(Category logger, Appender appender);

    public abstract void resetConfiguration();


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