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.CamelExchangeException; 020 import org.apache.camel.Exchange; 021 import org.apache.camel.LoggingLevel; 022 import org.apache.camel.RollbackExchangeException; 023 import org.apache.camel.spi.ExceptionHandler; 024 import org.apache.camel.util.CamelLogger; 025 import org.slf4j.LoggerFactory; 026 027 /** 028 * A default implementation of {@link ExceptionHandler} which uses a {@link org.apache.camel.processor.CamelLogger} to 029 * log the exception. 030 * <p/> 031 * This implementation will by default log the exception with stack trace at WARN level. 032 * 033 * @version 034 */ 035 public class LoggingExceptionHandler implements ExceptionHandler { 036 private final CamelLogger logger; 037 038 public LoggingExceptionHandler(Class<?> ownerType) { 039 this(new CamelLogger(LoggerFactory.getLogger(ownerType), LoggingLevel.WARN)); 040 } 041 042 public LoggingExceptionHandler(Class<?> ownerType, LoggingLevel level) { 043 this(new CamelLogger(LoggerFactory.getLogger(ownerType), level)); 044 } 045 046 public LoggingExceptionHandler(CamelLogger logger) { 047 this.logger = logger; 048 } 049 050 public void handleException(Throwable exception) { 051 handleException(null, null, exception); 052 } 053 054 public void handleException(String message, Throwable exception) { 055 handleException(message, null, exception); 056 } 057 058 public void handleException(String message, Exchange exchange, Throwable exception) { 059 try { 060 String msg = CamelExchangeException.createExceptionMessage(message, exchange, exception); 061 if (isCausedByRollbackExchangeException(exception)) { 062 // do not log stack trace for intended rollbacks 063 logger.log(msg); 064 } else { 065 if (exception != null) { 066 logger.log(msg, exception); 067 } else { 068 logger.log(msg); 069 } 070 } 071 } catch (Throwable e) { 072 // the logging exception handler must not cause new exceptions to occur 073 } 074 } 075 076 protected boolean isCausedByRollbackExchangeException(Throwable exception) { 077 if (exception == null) { 078 return false; 079 } 080 if (exception instanceof RollbackExchangeException) { 081 return true; 082 } else if (exception.getCause() != null) { 083 // recursive children 084 return isCausedByRollbackExchangeException(exception.getCause()); 085 } 086 087 return false; 088 } 089 }