| /* |
| * 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.log4j.rewrite; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.log4j.Logger; |
| import org.apache.log4j.spi.LoggingEvent; |
| |
| /** |
| * This policy rewrites events where the message of the |
| * original event implementes java.util.Map. |
| * All other events are passed through unmodified. |
| * If the map contains a "message" entry, the value will be |
| * used as the message for the rewritten event. The rewritten |
| * event will have a property set that is the combination of the |
| * original property set and the other members of the message map. |
| * If both the original property set and the message map |
| * contain the same entry, the value from the message map |
| * will overwrite the original property set. |
| * |
| * The combination of the RewriteAppender and this policy |
| * performs the same actions as the MapFilter from log4j 1.3. |
| */ |
| public class MapRewritePolicy implements RewritePolicy { |
| /** |
| * {@inheritDoc} |
| */ |
| public LoggingEvent rewrite(final LoggingEvent source) { |
| Object msg = source.getMessage(); |
| if (msg instanceof Map) { |
| Map props = new HashMap(source.getProperties()); |
| Map eventProps = (Map) msg; |
| // |
| // if the map sent in the logging request |
| // has "message" entry, use that as the message body |
| // otherwise, use the entire map. |
| // |
| Object newMsg = eventProps.get("message"); |
| if (newMsg == null) { |
| newMsg = msg; |
| } |
| |
| for (Object o : eventProps.entrySet()) { |
| Map.Entry entry = (Map.Entry) o; |
| if (!("message".equals(entry.getKey()))) { |
| props.put(entry.getKey(), entry.getValue()); |
| } |
| } |
| |
| return new LoggingEvent( |
| source.getFQNOfLoggerClass(), |
| source.getLogger() != null ? source.getLogger(): Logger.getLogger(source.getLoggerName()), |
| source.getTimeStamp(), |
| source.getLevel(), |
| newMsg, |
| source.getThreadName(), |
| source.getThrowableInformation(), |
| source.getNDC(), |
| source.getLocationInformation(), |
| props); |
| } else { |
| return source; |
| } |
| |
| } |
| } |