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.apache.logging.slf4j; 018 019 import java.net.URI; 020 021 import org.apache.logging.log4j.spi.LoggerContext; 022 import org.apache.logging.log4j.spi.LoggerContextFactory; 023 024 /** 025 * 026 */ 027 public class SLF4JLoggerContextFactory implements LoggerContextFactory { 028 private static LoggerContext context = new SLF4JLoggerContext(); 029 030 public SLF4JLoggerContextFactory() { 031 // LOG4J2-230, LOG4J2-204 (improve error reporting when misconfigured) 032 boolean misconfigured = false; 033 try { 034 Class.forName("org.slf4j.helpers.Log4jLoggerFactory"); 035 misconfigured = true; 036 } catch (ClassNotFoundException classNotFoundIsGood) { 037 // org.slf4j.helpers.Log4jLoggerFactory is not on classpath. Good! 038 } 039 if (misconfigured) { 040 throw new IllegalStateException("slf4j-impl jar is mutually exclusive with log4j-to-slf4j jar " 041 + "(the first routes calls from SLF4J to Log4j, the second from Log4j to SLF4J)"); 042 } 043 } 044 045 @Override 046 public LoggerContext getContext(final String fqcn, final ClassLoader loader, final boolean currentContext) { 047 return context; 048 } 049 050 @Override 051 public LoggerContext getContext(final String fqcn, final ClassLoader loader, final boolean currentContext, 052 URI configLocation) { 053 return context; 054 } 055 056 @Override 057 public void removeContext(LoggerContext context) { 058 } 059 }