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    1   /*
    2    * Copyright 2001-2004 The Apache Software Foundation.
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *      http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16
    17  package org.apache.log4j.spi;
    18
    19  import org.apache.log4j.spi.LoggerRepository;
    20  import java.net.URL;
    21
    22  /**
    23     Implemented by classes capable of configuring log4j using a URL.
    24
    25     @since 1.0
    26     @author Anders Kristensen
    27   */
    28  public interface Configurator {
    29
    30      /**
    31         Special level value signifying inherited behaviour. The current
    32         value of this string constant is <b>inherited</b>. {@link #NULL}
    33         is a synonym.  */
    34      public static final String INHERITED = "inherited";
    35
    36      /**
    37         Special level signifying inherited behaviour, same as {@link
    38         #INHERITED}. The current value of this string constant is
    39         <b>null</b>. */
    40      public static final String NULL = "null";
    41
    42      /**
    43         Interpret a resource pointed by a URL and set up log4j accordingly.
    44
    45         The configuration is done relative to the <code>hierarchy</code>
    46         parameter.
    47
    48         @param url The URL to parse
    49         @param repository The hierarchy to operation upon.
    50       */
    51      void doConfigure(URL url, LoggerRepository repository);
    52  }