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.core;
018    
019    import java.util.EventListener;
020    
021    import org.apache.logging.log4j.LogManager;
022    
023    /**
024     * Base class for server classes that listen to {@link LogEvent}s.
025     * TODO (MS) How is this class any different from Appender?
026     */
027    public class LogEventListener implements EventListener {
028    
029        private final LoggerContext context;
030    
031        protected LogEventListener() {
032            context = (LoggerContext) LogManager.getContext(false);
033        }
034    
035        public void log(final LogEvent event) {
036            if (event == null) {
037                return;
038            }
039            final Logger logger = context.getLogger(event.getLoggerName());
040            if (logger.config.filter(event.getLevel(), event.getMarker(), event.getMessage(), event.getThrown())) {
041                logger.config.logEvent(event);
042            }
043        }
044    }