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.logging.log4j.status;
018    
019    import java.io.Closeable;
020    import java.util.EventListener;
021    
022    import org.apache.logging.log4j.Level;
023    
024    /**
025     * Interface that allows implementers to be notified of events in the logging system.
026     */
027    public interface StatusListener extends Closeable, EventListener {
028    
029        /**
030         * Called as events occur to process the StatusData.
031         * @param data The StatusData for the event.
032         */
033        void log(StatusData data);
034    
035        /**
036         * Return the Log Level that this listener wants included.
037         * @return the Log Level.
038         */
039        Level getStatusLevel();
040    }