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.management;
018    
019    import org.apache.camel.Exchange;
020    import org.apache.camel.management.mbean.ManagedPerformanceCounter;
021    import org.apache.camel.processor.DelegateProcessor;
022    import org.apache.commons.logging.Log;
023    import org.apache.commons.logging.LogFactory;
024    
025    /**
026     * JMX enabled processor that uses the {@link org.apache.camel.management.mbean.ManagedCounter} for instrumenting
027     * processing of exchanges.
028     *
029     * @version $Revision: 836213 $
030     */
031    public class InstrumentationProcessor extends DelegateProcessor {
032    
033        private static final transient Log LOG = LogFactory.getLog(InstrumentationProcessor.class);
034        private PerformanceCounter counter;
035        private String type;
036    
037        public InstrumentationProcessor() {
038        }
039    
040        public InstrumentationProcessor(PerformanceCounter counter) {
041            this.counter = counter;
042        }
043    
044        @Override
045        public String toString() {
046            return "Instrumentation" + (type != null ? ":" + type : "") + "[" + processor + "]";
047        }
048    
049        public void setCounter(ManagedPerformanceCounter counter) {
050            if (this.counter instanceof DelegatePerformanceCounter) {
051                ((DelegatePerformanceCounter) this.counter).setCounter(counter);
052            } else {
053                this.counter = counter;
054            }
055        }
056    
057        public void process(Exchange exchange) throws Exception {
058            if (processor != null) {
059    
060                // use nano time as its more accurate
061                long startTime = -1;
062                if (counter != null && counter.isStatisticsEnabled()) {
063                    startTime = System.nanoTime();
064                }
065    
066                try {
067                    processor.process(exchange);
068                } catch (Exception e) {
069                    exchange.setException(e);
070                }
071    
072                if (startTime != -1) {
073                    long diff = (System.nanoTime() - startTime) / 1000000;
074                    recordTime(exchange, diff);
075                }
076            }
077        }
078    
079        protected void recordTime(Exchange exchange, long duration) {
080            if (LOG.isTraceEnabled()) {
081                LOG.trace((type != null ? type + ": " : "") + "Recording duration: " + duration + " millis for exchange: " + exchange);
082            }
083    
084            if (!exchange.isFailed() && exchange.getException() == null) {
085                counter.completedExchange(duration);
086            } else {
087                counter.failedExchange();
088            }
089        }
090    
091        public String getType() {
092            return type;
093        }
094    
095        public void setType(String type) {
096            this.type = type;
097        }
098    }