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.selector;
018    
019    import org.apache.logging.log4j.core.LoggerContext;
020    import org.apache.logging.log4j.core.impl.ContextAnchor;
021    
022    import java.net.URI;
023    import java.util.ArrayList;
024    import java.util.Collections;
025    import java.util.List;
026    
027    /**
028     * Returns either this Thread's context or the default LoggerContext.
029     */
030    public class BasicContextSelector implements ContextSelector {
031    
032        private static final LoggerContext CONTEXT = new LoggerContext("Default");
033    
034        public LoggerContext getContext(final String fqcn, final ClassLoader loader, final boolean currentContext) {
035    
036            final LoggerContext ctx = ContextAnchor.THREAD_CONTEXT.get();
037            return ctx != null ? ctx : CONTEXT;
038        }
039    
040    
041        public LoggerContext getContext(final String fqcn, final ClassLoader loader, final boolean currentContext,
042                                        URI configLocation) {
043    
044            final LoggerContext ctx = ContextAnchor.THREAD_CONTEXT.get();
045            return ctx != null ? ctx : CONTEXT;
046        }
047    
048        public LoggerContext locateContext(final String name, final String configLocation) {
049            return CONTEXT;
050        }
051    
052        public void removeContext(final LoggerContext context) {
053    
054        }
055    
056        public List<LoggerContext> getLoggerContexts() {
057            final List<LoggerContext> list = new ArrayList<LoggerContext>();
058            list.add(CONTEXT);
059            return Collections.unmodifiableList(list);
060        }
061    
062    }