org.slf4j.helpers.Log4jLoggerFactory is not on classpath. Good!
2024-09-03 09:21:01
1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache license, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the license for the specific language governing permissions and
15 * limitations under the license.
16 */
17 package org.apache.logging.slf4j;
18
19 import java.net.URI;
20
21 import org.apache.logging.log4j.spi.LoggerContext;
22 import org.apache.logging.log4j.spi.LoggerContextFactory;
23 import org.apache.logging.log4j.status.StatusLogger;
24
25 /**
26 *
27 */
28 public class SLF4JLoggerContextFactory implements LoggerContextFactory {
29 private static final StatusLogger LOGGER = StatusLogger.getLogger();
30 private static LoggerContext context = new SLF4JLoggerContext();
31
32 public SLF4JLoggerContextFactory() {
33 // LOG4J2-230, LOG4J2-204 (improve error reporting when misconfigured)
34 boolean misconfigured = false;
35 try {
36 Class.forName("org.slf4j.helpers.Log4jLoggerFactory");
37 misconfigured = true;
38 } catch (final ClassNotFoundException classNotFoundIsGood) {
39 LOGGER.debug("org.slf4j.helpers.Log4jLoggerFactory is not on classpath. Good!");
40 }
41 if (misconfigured) {
42 throw new IllegalStateException("slf4j-impl jar is mutually exclusive with log4j-to-slf4j jar "
43 + "(the first routes calls from SLF4J to Log4j, the second from Log4j to SLF4J)");
44 }
45 }
46
47 @Override
48 public LoggerContext getContext(final String fqcn, final ClassLoader loader, final Object externalContext,
49 final boolean currentContext) {
50 return context;
51 }
52
53 @Override
54 public LoggerContext getContext(final String fqcn, final ClassLoader loader, final Object externalContext,
55 final boolean currentContext, final URI configLocation, final String name) {
56 return context;
57 }
58
59 @Override
60 public void removeContext(final LoggerContext context) {
61 }
62 }
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