001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements. See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache license, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License. You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the license for the specific language governing permissions and
015     * limitations under the license.
016     */
017    package org.apache.log4j.spi;
018    
019    /**
020    
021     The <code>LogManager</code> uses one (and only one)
022     <code>RepositorySelector</code> implementation to select the
023     {@link org.apache.log4j.spi.LoggerRepository} for a particular application context.
024    
025     <p>It is the responsibility of the <code>RepositorySelector</code>
026     implementation to track the application context. Log4j makes no
027     assumptions about the application context or on its management.
028    
029     <p>See also {@link org.apache.log4j.LogManager LogManager}.
030    
031     @since 1.2
032    
033     */
034    public interface RepositorySelector {
035    
036        /**
037         * Returns a {@link org.apache.log4j.spi.LoggerRepository} depending on the
038         * context. Implementers must make sure that a valid (non-null)
039         * LoggerRepository is returned.
040         * @return a LoggerRepository.
041         */
042        LoggerRepository getLoggerRepository();
043    }