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.processor;
018
019 import org.apache.camel.Exchange;
020 import org.apache.camel.LoggingLevel;
021 import org.apache.camel.Processor;
022 import org.apache.camel.util.ServiceHelper;
023 import org.apache.commons.logging.Log;
024 import org.apache.commons.logging.LogFactory;
025
026 /**
027 * An {@link ErrorHandler} which uses commons-logging to dump the error
028 *
029 * @version $Revision: 752464 $
030 */
031 public class LoggingErrorHandler extends ErrorHandlerSupport {
032 private Processor output;
033 private Log log;
034 private LoggingLevel level;
035
036 public LoggingErrorHandler(Processor output) {
037 this(output, LogFactory.getLog(LoggingErrorHandler.class), LoggingLevel.INFO);
038 }
039
040 public LoggingErrorHandler(Processor output, Log log, LoggingLevel level) {
041 this.output = output;
042 this.log = log;
043 this.level = level;
044 }
045
046 @Override
047 public String toString() {
048 return "LoggingErrorHandler[" + output + "]";
049 }
050
051 public void process(Exchange exchange) throws Exception {
052 Throwable error = null;
053 try {
054 output.process(exchange);
055
056 // could also fail and set exception on the exchange itself
057 if (exchange.getException() != null) {
058 error = exchange.getException();
059 }
060 } catch (Exception e) {
061 error = e;
062 }
063
064 if (error != null) {
065 if (!customProcessorForException(exchange, error)) {
066 logError(exchange, error);
067 }
068 }
069 }
070
071 // Properties
072 // -------------------------------------------------------------------------
073
074 /**
075 * Returns the output processor
076 */
077 public Processor getOutput() {
078 return output;
079 }
080
081 public LoggingLevel getLevel() {
082 return level;
083 }
084
085 public void setLevel(LoggingLevel level) {
086 this.level = level;
087 }
088
089 public Log getLog() {
090 return log;
091 }
092
093 public void setLog(Log log) {
094 this.log = log;
095 }
096
097 // Implementation methods
098 // -------------------------------------------------------------------------
099 protected void logError(Exchange exchange, Throwable e) {
100 switch (level) {
101 case DEBUG:
102 if (log.isDebugEnabled()) {
103 log.debug(logMessage(exchange, e), e);
104 }
105 break;
106 case ERROR:
107 if (log.isErrorEnabled()) {
108 log.error(logMessage(exchange, e), e);
109 }
110 break;
111 case FATAL:
112 if (log.isFatalEnabled()) {
113 log.fatal(logMessage(exchange, e), e);
114 }
115 break;
116 case INFO:
117 if (log.isInfoEnabled()) {
118 log.info(logMessage(exchange, e), e);
119 }
120 break;
121 case TRACE:
122 if (log.isTraceEnabled()) {
123 log.trace(logMessage(exchange, e), e);
124 }
125 break;
126 case WARN:
127 if (log.isWarnEnabled()) {
128 log.warn(logMessage(exchange, e), e);
129 }
130 break;
131 default:
132 log.error("Unknown level: " + level + " when trying to log exchange: " + logMessage(exchange, e),
133 e);
134 }
135 }
136
137 protected Object logMessage(Exchange exchange, Throwable e) {
138 return e + " while processing exchange: " + exchange;
139 }
140
141 protected void doStart() throws Exception {
142 ServiceHelper.startServices(output);
143 }
144
145 protected void doStop() throws Exception {
146 ServiceHelper.stopServices(output);
147 }
148 }