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