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: 671751 $
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 final long startTime = System.nanoTime();
055
056 if (processor instanceof AsyncProcessor) {
057 return ((AsyncProcessor)processor).process(exchange, new AsyncCallback() {
058 public void done(boolean doneSynchronously) {
059 if (counter != null) {
060 // convert nanoseconds to milliseconds
061 recordTime(exchange, (System.nanoTime() - startTime) / 1000000.0);
062 }
063 callback.done(doneSynchronously);
064 }
065 });
066 }
067
068 try {
069 processor.process(exchange);
070 } catch (Exception e) {
071 exchange.setException(e);
072 }
073
074 if (counter != null) {
075 // convert nanoseconds to milliseconds
076 recordTime(exchange, (System.nanoTime() - startTime) / 1000000.0);
077 }
078 callback.done(true);
079 return true;
080 }
081
082 protected void recordTime(Exchange exchange, double duration) {
083 if (LOG.isTraceEnabled()) {
084 LOG.trace("Recording duration: " + duration + " millis for exchange: " + exchange);
085 }
086
087 if (!exchange.isFailed() && exchange.getException() == null) {
088 counter.completedExchange(duration);
089 } else {
090 counter.failedExchange();
091 }
092 }
093
094 }