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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements. See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache license, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License. You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the license for the specific language governing permissions and
    15   * limitations under the license.
    16   */
    17  package org.apache.logging.log4j.core;
    18
    19  import java.util.EventListener;
    20
    21  import org.apache.logging.log4j.LogManager;
    22
    23  /**
    24   * Base class for server classes that listen to {@link LogEvent}s.
    25   * TODO (MS) How is this class any different from Appender?
    26   */
    27  public class LogEventListener implements EventListener {
    28
    29      private final LoggerContext context;
    30
    31      protected LogEventListener() {
    32          context = (LoggerContext) LogManager.getContext(false);
    33      }
    34
    35      public void log(final LogEvent event) {
    36          if (event == null) {
    37              return;
    38          }
    39          final Logger logger = context.getLogger(event.getLoggerName());
    40          if (logger.config.filter(event.getLevel(), event.getMarker(), event.getMessage(), event.getThrown())) {
    41              logger.config.logEvent(event);
    42          }
    43      }
    44  }