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 */
017package org.apache.logging.log4j.core.selector;
018
019import java.net.URI;
020import java.util.ArrayList;
021import java.util.Collections;
022import java.util.List;
023import java.util.concurrent.TimeUnit;
024
025import org.apache.logging.log4j.core.LoggerContext;
026import org.apache.logging.log4j.core.impl.ContextAnchor;
027
028/**
029 * Returns either this Thread's context or the default LoggerContext.
030 */
031public class BasicContextSelector implements ContextSelector {
032
033    private static final LoggerContext CONTEXT = new LoggerContext("Default");
034
035    @Override
036    public void shutdown(String fqcn, ClassLoader loader, boolean currentContext, boolean allContexts) {
037        LoggerContext ctx = getContext(fqcn, loader, currentContext);
038        if (ctx != null && ctx.isStarted()) {
039            ctx.stop(DEFAULT_STOP_TIMEOUT, TimeUnit.MILLISECONDS);
040        }
041    }
042
043    @Override
044    public boolean hasContext(String fqcn, ClassLoader loader, boolean currentContext) {
045        LoggerContext ctx = getContext(fqcn, loader, currentContext);
046        return ctx != null && ctx.isStarted();
047    }
048
049    @Override
050    public LoggerContext getContext(final String fqcn, final ClassLoader loader, final boolean currentContext) {
051        final LoggerContext ctx = ContextAnchor.THREAD_CONTEXT.get();
052        return ctx != null ? ctx : CONTEXT;
053    }
054
055
056    @Override
057    public LoggerContext getContext(final String fqcn, final ClassLoader loader, final boolean currentContext,
058                                    final URI configLocation) {
059
060        final LoggerContext ctx = ContextAnchor.THREAD_CONTEXT.get();
061        return ctx != null ? ctx : CONTEXT;
062    }
063
064    public LoggerContext locateContext(final String name, final String configLocation) {
065        return CONTEXT;
066    }
067
068    @Override
069    public void removeContext(final LoggerContext context) {
070        // does not remove anything
071    }
072
073    @Override
074    public boolean isClassLoaderDependent() {
075        return false;
076    }
077
078    @Override
079    public List<LoggerContext> getLoggerContexts() {
080        final List<LoggerContext> list = new ArrayList<>();
081        list.add(CONTEXT);
082        return Collections.unmodifiableList(list);
083    }
084
085}