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Copyright (c) 2004-2011 All rights reserved. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 package org.slf4j.helpers;
An almost trivial implementation of the org.slf4j.IMarkerFactory interface which creates BasicMarker instances.

Simple logging systems can conform to the SLF4J API by binding org.slf4j.MarkerFactory with an instance of this class.

Ceki Gülcü
 public class BasicMarkerFactory implements IMarkerFactory {
   private final ConcurrentMap<StringMarkermarkerMap = new ConcurrentHashMap<StringMarker>();
Regular users should not create BasicMarkerFactory instances. Marker instances can be obtained using the static org.slf4j.MarkerFactory.getMarker(java.lang.String) method.
   public BasicMarkerFactory() {

Manufacture a BasicMarker instance by name. If the instance has been created earlier, return the previously created instance.

name the name of the marker to be created
a Marker instance
   public Marker getMarker(String name) {
     if (name == null) {
       throw new IllegalArgumentException("Marker name cannot be null");
     Marker marker = .get(name);
     if (marker == null) {
       marker = new BasicMarker(name);
       Marker oldMarker = .putIfAbsent(namemarker);
       if (oldMarker != null) {
         marker = oldMarker;
     return marker;
Does the name marked already exist?
   public boolean exists(String name) {
     if (name == null) {
       return false;
     return .containsKey(name);
   public boolean detachMarker(String name) {
     if(name == null) {
       return false;
     return (.remove(name) != null);
   public Marker getDetachedMarker(String name) {
     return  new BasicMarker(name);
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