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.log4j.core.config;
018    
019    import java.util.concurrent.ConcurrentHashMap;
020    import java.util.concurrent.ConcurrentMap;
021    
022    import org.apache.logging.log4j.core.config.plugins.Plugin;
023    import org.apache.logging.log4j.core.config.plugins.PluginElement;
024    import org.apache.logging.log4j.core.config.plugins.PluginFactory;
025    
026    /**
027     * Container of Logger objects.
028     */
029    @Plugin(name = "loggers", category = Node.CATEGORY)
030    public final class LoggersPlugin {
031    
032        private LoggersPlugin() {
033        }
034    
035        /**
036         * Create a Loggers object to contain all the Loggers.
037         * @param loggers An array of Loggers.
038         * @return A Loggers object.
039         */
040        @PluginFactory
041        public static Loggers createLoggers(@PluginElement("Loggers") final LoggerConfig[] loggers) {
042            final ConcurrentMap<String, LoggerConfig> loggerMap = new ConcurrentHashMap<String, LoggerConfig>();
043            LoggerConfig root = null;
044    
045            for (final LoggerConfig logger : loggers) {
046                if (logger != null) {
047                    if (logger.getName().isEmpty()) {
048                        root = logger;
049                    }
050                    loggerMap.put(logger.getName(), logger);
051                }
052            }
053    
054            return new Loggers(loggerMap, root);
055        }
056    }