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.Processor;
021 import org.apache.camel.impl.ServiceSupport;
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: 564295 $
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 try {
053 output.process(exchange);
054 } catch (Throwable e) {
055 if (!customProcessorForException(exchange, e)) {
056 logError(exchange, e);
057 }
058 }
059 }
060
061 // Properties
062 // -------------------------------------------------------------------------
063
064 /**
065 * Returns the output processor
066 */
067 public Processor getOutput() {
068 return output;
069 }
070
071 public LoggingLevel getLevel() {
072 return level;
073 }
074
075 public void setLevel(LoggingLevel level) {
076 this.level = level;
077 }
078
079 public Log getLog() {
080 return log;
081 }
082
083 public void setLog(Log log) {
084 this.log = log;
085 }
086
087 // Implementation methods
088 // -------------------------------------------------------------------------
089 protected void logError(Exchange exchange, Throwable e) {
090 switch (level) {
091 case DEBUG:
092 if (log.isDebugEnabled()) {
093 log.debug(logMessage(exchange, e), e);
094 }
095 break;
096 case ERROR:
097 if (log.isErrorEnabled()) {
098 log.error(logMessage(exchange, e), e);
099 }
100 break;
101 case FATAL:
102 if (log.isFatalEnabled()) {
103 log.fatal(logMessage(exchange, e), e);
104 }
105 break;
106 case INFO:
107 if (log.isInfoEnabled()) {
108 log.debug(logMessage(exchange, e), e);
109 }
110 break;
111 case TRACE:
112 if (log.isTraceEnabled()) {
113 log.trace(logMessage(exchange, e), e);
114 }
115 break;
116 case WARN:
117 if (log.isWarnEnabled()) {
118 log.warn(logMessage(exchange, e), e);
119 }
120 break;
121 default:
122 log.error("Unknown level: " + level + " when trying to log exchange: " + logMessage(exchange, e),
123 e);
124 }
125 }
126
127 protected Object logMessage(Exchange exchange, Throwable e) {
128 return e + " while processing exchange: " + exchange;
129 }
130
131 protected void doStart() throws Exception {
132 ServiceHelper.startServices(output);
133 }
134
135 protected void doStop() throws Exception {
136 ServiceHelper.stopServices(output);
137 }
138 }