| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package freemarker.log; |
| |
| /** |
| * Don't use this class; it's only public to work around Google App Engine Java |
| * compliance issues. FreeMarker developers only: treat this class as package-visible. |
| */ |
| public class _Log4jOverSLF4JTester { |
| |
| private static final String MDC_KEY = _Log4jOverSLF4JTester.class.getName(); |
| |
| /** |
| * Returns if Log4j-over-SLF4J is actually working. Sometimes the API classes are present, but there's no SLF4J |
| * implementation around. |
| */ |
| public static final boolean test() { |
| org.apache.log4j.MDC.put(MDC_KEY, ""); |
| try { |
| return org.slf4j.MDC.get(MDC_KEY) != null; |
| } finally { |
| org.apache.log4j.MDC.remove(MDC_KEY); |
| } |
| } |
| |
| } |