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: 793288 $
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 boolean supportTransacted() {
052 return false;
053 }
054
055 public void process(Exchange exchange) throws Exception {
056 Throwable error = null;
057 try {
058 output.process(exchange);
059
060 // could also fail and set exception on the exchange itself
061 if (exchange.getException() != null) {
062 error = exchange.getException();
063 }
064 } catch (Exception e) {
065 error = e;
066 }
067
068 if (error != null) {
069 if (!customProcessorForException(exchange, error)) {
070 logError(exchange, error);
071 }
072 }
073 }
074
075 // Properties
076 // -------------------------------------------------------------------------
077
078 /**
079 * Returns the output processor
080 */
081 public Processor getOutput() {
082 return output;
083 }
084
085 public LoggingLevel getLevel() {
086 return level;
087 }
088
089 public void setLevel(LoggingLevel level) {
090 this.level = level;
091 }
092
093 public Log getLog() {
094 return log;
095 }
096
097 public void setLog(Log log) {
098 this.log = log;
099 }
100
101 // Implementation methods
102 // -------------------------------------------------------------------------
103 protected void logError(Exchange exchange, Throwable e) {
104 switch (level) {
105 case DEBUG:
106 if (log.isDebugEnabled()) {
107 log.debug(logMessage(exchange, e), e);
108 }
109 break;
110 case ERROR:
111 if (log.isErrorEnabled()) {
112 log.error(logMessage(exchange, e), e);
113 }
114 break;
115 case FATAL:
116 if (log.isFatalEnabled()) {
117 log.fatal(logMessage(exchange, e), e);
118 }
119 break;
120 case INFO:
121 if (log.isInfoEnabled()) {
122 log.info(logMessage(exchange, e), e);
123 }
124 break;
125 case TRACE:
126 if (log.isTraceEnabled()) {
127 log.trace(logMessage(exchange, e), e);
128 }
129 break;
130 case WARN:
131 if (log.isWarnEnabled()) {
132 log.warn(logMessage(exchange, e), e);
133 }
134 break;
135 case OFF:
136 break;
137 default:
138 log.error("Unknown level: " + level + " when trying to log exchange: " + logMessage(exchange, e), e);
139 }
140 }
141
142 protected Object logMessage(Exchange exchange, Throwable e) {
143 return e.getMessage() + " while processing exchange: " + exchange;
144 }
145
146 protected void doStart() throws Exception {
147 ServiceHelper.startServices(output);
148 }
149
150 protected void doStop() throws Exception {
151 ServiceHelper.stopServices(output);
152 }
153 }