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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.config.plugins;
18  
19  import java.util.concurrent.ConcurrentHashMap;
20  import java.util.concurrent.ConcurrentMap;
21  
22  import org.apache.logging.log4j.core.config.LoggerConfig;
23  import org.apache.logging.log4j.core.config.Loggers;
24  
25  /**
26   * Container of Logger objects.
27   */
28  @Plugin(name = "loggers", category = "Core")
29  public final class LoggersPlugin {
30  
31      private LoggersPlugin() {
32      }
33  
34      /**
35       * Create a Loggers object to contain all the Loggers.
36       * @param loggers An array of Loggers.
37       * @return A Loggers object.
38       */
39      @PluginFactory
40      public static Loggers createLoggers(@PluginElement("Loggers") final LoggerConfig[] loggers) {
41          final ConcurrentMap<String, LoggerConfig> loggerMap = new ConcurrentHashMap<String, LoggerConfig>();
42          LoggerConfig root = null;
43  
44          for (final LoggerConfig logger : loggers) {
45              if (logger != null) {
46                  if (logger.getName().isEmpty()) {
47                      root = logger;
48                  }
49                  loggerMap.put(logger.getName(), logger);
50              }
51          }
52  
53          return new Loggers(loggerMap, root);
54      }
55  }