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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.log4j.core.selector;
18  
19  import java.net.URI;
20  import java.util.ArrayList;
21  import java.util.Collections;
22  import java.util.List;
23  
24  import org.apache.logging.log4j.core.LoggerContext;
25  import org.apache.logging.log4j.core.impl.ContextAnchor;
26  
27  /**
28   * Returns either this Thread's context or the default LoggerContext.
29   */
30  public class BasicContextSelector implements ContextSelector {
31  
32      private static final LoggerContext CONTEXT = new LoggerContext("Default");
33  
34      @Override
35      public LoggerContext getContext(final String fqcn, final ClassLoader loader, final boolean currentContext) {
36  
37          final LoggerContext ctx = ContextAnchor.THREAD_CONTEXT.get();
38          return ctx != null ? ctx : CONTEXT;
39      }
40  
41  
42      @Override
43      public LoggerContext getContext(final String fqcn, final ClassLoader loader, final boolean currentContext,
44                                      final URI configLocation) {
45  
46          final LoggerContext ctx = ContextAnchor.THREAD_CONTEXT.get();
47          return ctx != null ? ctx : CONTEXT;
48      }
49  
50      public LoggerContext locateContext(final String name, final String configLocation) {
51          return CONTEXT;
52      }
53  
54      @Override
55      public void removeContext(final LoggerContext context) {
56      }
57  
58      @Override
59      public List<LoggerContext> getLoggerContexts() {
60          final List<LoggerContext> list = new ArrayList<LoggerContext>();
61          list.add(CONTEXT);
62          return Collections.unmodifiableList(list);
63      }
64  
65  }