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     */
017    package org.apache.camel.impl;
018    
019    import org.apache.camel.LoggingLevel;
020    import org.apache.camel.RollbackExchangeException;
021    import org.apache.camel.processor.Logger;
022    import org.apache.camel.spi.ExceptionHandler;
023    import org.apache.commons.logging.LogFactory;
024    
025    /**
026     * A default implementation of {@link ExceptionHandler} which uses a {@link Logger} to
027     * log to an arbitrary {@link org.apache.commons.logging.Log Log} with some {@link LoggingLevel}
028     *
029     * @version $Revision: 757367 $
030     */
031    public class LoggingExceptionHandler implements ExceptionHandler {
032        private final Logger logger;
033    
034        public LoggingExceptionHandler(Class ownerType) {
035            this(new Logger(LogFactory.getLog(ownerType), LoggingLevel.ERROR));
036        }
037    
038        public LoggingExceptionHandler(Logger logger) {
039            this.logger = logger;
040        }
041    
042        public void handleException(Throwable exception) {
043            if (isCausedByRollbackExchangeException(exception)) {
044                // do not log stacktrace for intended rollbacks
045                logger.log(exception.getMessage());
046            } else {
047                logger.log(exception.getMessage(), exception);
048            }
049        }
050    
051        protected boolean isCausedByRollbackExchangeException(Throwable exception) {
052            if (exception instanceof RollbackExchangeException) {
053                return true;
054            } else if (exception.getCause() != null) {
055                // recursive children
056                return isCausedByRollbackExchangeException(exception.getCause());
057            }
058    
059            return false;
060        }
061    
062    }