1 package org.eclipse.aether.internal.impl;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import javax.inject.Inject;
23 import javax.inject.Named;
24 import javax.inject.Provider;
25 import javax.inject.Singleton;
26
27 import org.eclipse.aether.spi.log.LoggerFactory;
28 import org.eclipse.aether.spi.log.NullLoggerFactory;
29
30 /**
31 * Helps Sisu-based applications to pick the right logger factory depending on the classpath.
32 */
33 @Named
34 @Singleton
35 public class LoggerFactoryProvider
36 implements Provider<LoggerFactory>
37 {
38
39 @Inject
40 @Named( "slf4j" )
41 private Provider<LoggerFactory> slf4j;
42
43 public LoggerFactory get()
44 {
45 try
46 {
47 LoggerFactory factory = slf4j.get();
48 if ( factory != null )
49 {
50 return factory;
51 }
52 }
53 catch ( LinkageError e )
54 {
55 // fall through
56 }
57 catch ( RuntimeException e )
58 {
59 // fall through
60 }
61 return NullLoggerFactory.INSTANCE;
62 }
63
64 }