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.slf4j.helpers;
018    
019    import org.slf4j.IMarkerFactory;
020    import org.slf4j.Marker;
021    
022    import java.util.concurrent.ConcurrentHashMap;
023    import java.util.concurrent.ConcurrentMap;
024    
025    /**
026     *
027     */
028    public class Log4JMarkerFactory implements IMarkerFactory {
029    
030        private ConcurrentMap<String, Marker> markerMap = new ConcurrentHashMap<String, Marker>();
031    
032        public Marker getMarker(String name) {
033            if (name == null) {
034                throw new IllegalArgumentException("Marker name must not be null");
035            }
036            Marker marker = markerMap.get(name);
037            if (marker == null) {
038                marker = new MarkerWrapper(name);
039            }
040            return marker;
041        }
042    
043        public boolean exists(String name) {
044            return markerMap.containsKey(name);
045        }
046    
047        public boolean detachMarker(String name) {
048            return false;
049        }
050    
051        public Marker getDetachedMarker(String name) {
052            return new MarkerWrapper(name);
053        }
054    }