Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache license, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the license for the specific language governing permissions and * limitations under the license. */ package org.apache.logging.log4j.jcl; import java.io.IOException; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentMap; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogConfigurationException; import org.apache.commons.logging.LogFactory; import org.apache.logging.log4j.spi.LoggerAdapter; /** * Log4j binding for Commons Logging. * {@inheritDoc} */ public class LogFactoryImpl extends LogFactory { private final LoggerAdapter<Log> adapter = new LogAdapter(); private final ConcurrentMap<String, Object> attributes = new ConcurrentHashMap<>(); @Override public Log getInstance(final String name) throws LogConfigurationException { return adapter.getLogger(name); } @Override public Object getAttribute(final String name) { return attributes.get(name); } @Override public String[] getAttributeNames() { return attributes.keySet().toArray(new String[attributes.size()]); } @Override public Log getInstance(@SuppressWarnings("rawtypes") final Class clazz) throws LogConfigurationException { return getInstance(clazz.getName()); } /** * This method is supposed to clear all loggers. In this implementation it will clear all the logger * wrappers but the loggers managed by the underlying logger context will not be. */ @Override public void release() { try { adapter.close(); } catch (final IOException ignored) { } } @Override public void removeAttribute(final String name) { attributes.remove(name); } @Override public void setAttribute(final String name, final Object value) { if (value != null) { attributes.put(name, value); } else { removeAttribute(name); } } }