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/**
 * 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.cxf.common.logging;

import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogRecord;

import org.slf4j.spi.LocationAwareLogger;

/**
 * 

* java.util.logging.Logger implementation delegating to SLF4J. *

*

* Methods {@link java.util.logging.Logger#setParent(Logger)}, {@link java.util.logging.Logger#getParent()}, * {@link java.util.logging.Logger#setUseParentHandlers(boolean)} and * {@link java.util.logging.Logger#getUseParentHandlers()} are not overridden. *

*

* Level mapping inspired by {@link org.slf4j.bridge.SLF4JBridgeHandler}: *

* *
 * FINEST  -> TRACE
 * FINER   -> DEBUG
 * FINE    -> DEBUG
 * CONFIG  -> DEBUG
 * INFO    -> INFO
 * WARN ING -> WARN
 * SEVER   -> ERROR
 * 
*/ public class Slf4jLogger extends AbstractDelegatingLogger { private static final String FQCN = AbstractDelegatingLogger.class.getName(); private final org.slf4j.Logger logger; private LocationAwareLogger locationAwareLogger; public Slf4jLogger(String name, String resourceBundleName) { super(name, resourceBundleName); logger = org.slf4j.LoggerFactory.getLogger(name); if (logger instanceof LocationAwareLogger) { locationAwareLogger = (LocationAwareLogger) logger; } } @Override protected boolean supportsHandlers() { return true; } @Override public Level getLevel() { Level level; // Verify from the wider (trace) to the narrower (error) if (logger.isTraceEnabled()) { level = Level.FINEST; } else if (logger.isDebugEnabled()) { // map to the lowest between FINER, FINE and CONFIG level = Level.FINER; } else if (logger.isInfoEnabled()) { level = Level.INFO; } else if (logger.isWarnEnabled()) { level = Level.WARNING; } else if (logger.isErrorEnabled()) { level = Level.SEVERE; } else { level = Level.OFF; } return level; } @Override public boolean isLoggable(Level level) { final int i = level.intValue(); if (i == Level.OFF.intValue()) { return false; } else if (i >= Level.SEVERE.intValue()) { return logger.isErrorEnabled(); } else if (i >= Level.WARNING.intValue()) { return logger.isWarnEnabled(); } else if (i >= Level.INFO.intValue()) { return logger.isInfoEnabled(); } else if (i >= Level.FINER.intValue()) { return logger.isDebugEnabled(); } return logger.isTraceEnabled(); } @Override protected void internalLogFormatted(String msg, LogRecord record) { Level level = record.getLevel(); Throwable t = record.getThrown(); Handler targets[] = getHandlers(); if (targets != null) { for (Handler h : targets) { h.publish(record); } } if (!getUseParentHandlers()) { return; } /* * As we can not use a "switch ... case" block but only a "if ... else if ..." block, the order of the * comparisons is important. We first try log level FINE then INFO, WARN, FINER, etc */ if (Level.FINE.equals(level)) { if (locationAwareLogger == null) { logger.debug(msg, t); } else { locationAwareLogger.log(null, FQCN, LocationAwareLogger.DEBUG_INT, msg, null, t); } } else if (Level.INFO.equals(level)) { if (locationAwareLogger == null) { logger.info(msg, t); } else { locationAwareLogger.log(null, FQCN, LocationAwareLogger.INFO_INT, msg, null, t); } } else if (Level.WARNING.equals(level)) { if (locationAwareLogger == null) { logger.warn(msg, t); } else { locationAwareLogger.log(null, FQCN, LocationAwareLogger.WARN_INT, msg, null, t); } } else if (Level.FINER.equals(level)) { if (locationAwareLogger == null) { logger.trace(msg, t); } else { locationAwareLogger.log(null, FQCN, LocationAwareLogger.DEBUG_INT, msg, null, t); } } else if (Level.FINEST.equals(level)) { if (locationAwareLogger == null) { logger.trace(msg, t); } else { locationAwareLogger.log(null, FQCN, LocationAwareLogger.TRACE_INT, msg, null, t); } } else if (Level.ALL.equals(level)) { // should never occur, all is used to configure java.util.logging // but not accessible by the API Logger.xxx() API if (locationAwareLogger == null) { logger.error(msg, t); } else { locationAwareLogger.log(null, FQCN, LocationAwareLogger.ERROR_INT, msg, null, t); } } else if (Level.SEVERE.equals(level)) { if (locationAwareLogger == null) { logger.error(msg, t); } else { locationAwareLogger.log(null, FQCN, LocationAwareLogger.ERROR_INT, msg, null, t); } } else if (Level.CONFIG.equals(level)) { if (locationAwareLogger == null) { logger.debug(msg, t); } else { locationAwareLogger.log(null, FQCN, LocationAwareLogger.DEBUG_INT, msg, null, t); } } else if (Level.OFF.equals(level)) { // don't log } } }




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