    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 java.net.URI;
    020    import java.util.ArrayList;
    021    import java.util.Collections;
    022    import java.util.List;
    023
    024    import org.apache.logging.log4j.core.LoggerContext;
    025    import org.apache.logging.log4j.core.impl.ContextAnchor;
    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        @Override
    035        public LoggerContext getContext(final String fqcn, final ClassLoader loader, final boolean currentContext) {
    036
    037            final LoggerContext ctx = ContextAnchor.THREAD_CONTEXT.get();
    038            return ctx != null ? ctx : CONTEXT;
    039        }
    040
    041
    042        @Override
    043        public LoggerContext getContext(final String fqcn, final ClassLoader loader, final boolean currentContext,
    044                                        final URI configLocation) {
    045
    046            final LoggerContext ctx = ContextAnchor.THREAD_CONTEXT.get();
    047            return ctx != null ? ctx : CONTEXT;
    048        }
    049
    050        public LoggerContext locateContext(final String name, final String configLocation) {
    051            return CONTEXT;
    052        }
    053
    054        @Override
    055        public void removeContext(final LoggerContext context) {
    056        }
    057
    058        @Override
    059        public List<LoggerContext> getLoggerContexts() {
    060            final List<LoggerContext> list = new ArrayList<LoggerContext>();
    061            list.add(CONTEXT);
    062            return Collections.unmodifiableList(list);
    063        }
    064
    065    }