    001/*
    002 * Copyright 2001-2004 The Apache Software Foundation.
    003 *
    004 * Licensed under the Apache License, Version 2.0 (the "License");
    005 * you may not use this file except in compliance with the License.
    006 * You may obtain a copy of the License at
    007 *
    008 *      http://www.apache.org/licenses/LICENSE-2.0
    009 *
    010 * Unless required by applicable law or agreed to in writing, software
    011 * distributed under the License is distributed on an "AS IS" BASIS,
    012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    013 * See the License for the specific language governing permissions and
    014 * limitations under the License.
    015 */
    016
    017package org.apache.log4j.spi;
    018
    019import org.apache.log4j.spi.LoggerRepository;
    020import java.net.URL;
    021
    022/**
    023   Implemented by classes capable of configuring log4j using a URL.
    024
    025   @since 1.0
    026   @author Anders Kristensen
    027 */
    028public interface Configurator {
    029
    030    /**
    031       Special level value signifying inherited behaviour. The current
    032       value of this string constant is <b>inherited</b>. {@link #NULL}
    033       is a synonym.  */
    034    public static final String INHERITED = "inherited";
    035
    036    /**
    037       Special level signifying inherited behaviour, same as {@link
    038       #INHERITED}. The current value of this string constant is
    039       <b>null</b>. */
    040    public static final String NULL = "null";
    041
    042    /**
    043       Interpret a resource pointed by a URL and set up log4j accordingly.
    044
    045       The configuration is done relative to the <code>hierarchy</code>
    046       parameter.
    047
    048       @param url The URL to parse
    049       @param repository The hierarchy to operation upon.
    050     */
    051    void doConfigure(URL url, LoggerRepository repository);
    052}