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 }