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.AsyncCallback;
020 import org.apache.camel.AsyncProcessor;
021 import org.apache.camel.Exchange;
022 import org.apache.camel.processor.DelegateProcessor;
023 import org.apache.camel.util.AsyncProcessorHelper;
024 import org.apache.commons.logging.Log;
025 import org.apache.commons.logging.LogFactory;
026
027 /**
028 * JMX enabled processor that uses the {@link Counter} for instrumenting
029 * processing of exchanges.
030 *
031 * @version $Revision: 52387 $
032 */
033 public class InstrumentationProcessor extends DelegateProcessor implements AsyncProcessor {
034
035 private static final transient Log LOG = LogFactory.getLog(InstrumentationProcessor.class);
036 private PerformanceCounter counter;
037
038 public InstrumentationProcessor(PerformanceCounter counter) {
039 this.counter = counter;
040 }
041
042 public InstrumentationProcessor() {
043 }
044
045 public void setCounter(PerformanceCounter counter) {
046 this.counter = counter;
047 }
048
049 public void process(Exchange exchange) throws Exception {
050 AsyncProcessorHelper.process(this, exchange);
051 }
052
053 public boolean process(final Exchange exchange, final AsyncCallback callback) {
054 if (processor == null) {
055 // no processor so nothing to process, so return
056 callback.done(true);
057 return true;
058 }
059
060 final long startTime = System.nanoTime();
061
062 if (processor instanceof AsyncProcessor) {
063 return ((AsyncProcessor)processor).process(exchange, new AsyncCallback() {
064 public void done(boolean doneSynchronously) {
065 if (counter != null) {
066 // convert nanoseconds to milliseconds
067 recordTime(exchange, (System.nanoTime() - startTime) / 1000000.0);
068 }
069 callback.done(doneSynchronously);
070 }
071 });
072 }
073
074 try {
075 processor.process(exchange);
076 } catch (Throwable e) {
077 exchange.setException(e);
078 }
079
080 if (counter != null) {
081 // convert nanoseconds to milliseconds
082 recordTime(exchange, (System.nanoTime() - startTime) / 1000000.0);
083 }
084 callback.done(true);
085 return true;
086 }
087
088 protected void recordTime(Exchange exchange, double duration) {
089 if (LOG.isTraceEnabled()) {
090 LOG.trace("Recording duration: " + duration + " millis for exchange: " + exchange);
091 }
092
093 if (!exchange.isFailed() && exchange.getException() == null) {
094 counter.completedExchange(duration);
095 } else {
096 counter.failedExchange();
097 }
098 }
099
100 }