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.Exchange;
021    import org.apache.camel.Traceable;
022    import org.apache.camel.api.management.PerformanceCounter;
023    import org.apache.camel.management.mbean.ManagedPerformanceCounter;
024    import org.apache.camel.processor.DelegateAsyncProcessor;
025    import org.apache.camel.util.StopWatch;
026    import org.slf4j.Logger;
027    import org.slf4j.LoggerFactory;
028    
029    /**
030     * JMX enabled processor that uses the {@link org.apache.camel.management.mbean.ManagedCounter} for instrumenting
031     * processing of exchanges.
032     *
033     * @version 
034     */
035    public class InstrumentationProcessor extends DelegateAsyncProcessor implements Traceable {
036    
037        private static final transient Logger LOG = LoggerFactory.getLogger(InstrumentationProcessor.class);
038        private PerformanceCounter counter;
039        private String type;
040    
041        public InstrumentationProcessor() {
042        }
043    
044        public InstrumentationProcessor(PerformanceCounter counter) {
045            this.counter = counter;
046        }
047    
048        @Override
049        public String toString() {
050            return "Instrumentation" + (type != null ? ":" + type : "") + "[" + processor + "]";
051        }
052    
053        public void setCounter(Object counter) {
054            ManagedPerformanceCounter mpc = null;
055            if (counter instanceof ManagedPerformanceCounter) {
056                mpc = (ManagedPerformanceCounter) counter;
057            }
058    
059            if (this.counter instanceof DelegatePerformanceCounter) {
060                ((DelegatePerformanceCounter) this.counter).setCounter(mpc);
061            } else if (mpc != null) {
062                this.counter = mpc;
063            } else if (counter instanceof PerformanceCounter) {
064                this.counter = (PerformanceCounter) counter;
065            }
066        }
067    
068        @Override
069        public boolean process(final Exchange exchange, final AsyncCallback callback) {
070            // only record time if stats is enabled
071            final StopWatch watch = (counter != null && counter.isStatisticsEnabled()) ? new StopWatch() : null;
072    
073            return super.process(exchange, new AsyncCallback() {
074                public void done(boolean doneSync) {
075                    try {
076                        // record end time
077                        if (watch != null) {
078                            recordTime(exchange, watch.stop());
079                        }
080                    } finally {
081                        // and let the original callback know we are done as well
082                        callback.done(doneSync);
083                    }
084                }
085    
086                @Override
087                public String toString() {
088                    return InstrumentationProcessor.this.toString();
089                }
090            });
091        }
092    
093        protected void recordTime(Exchange exchange, long duration) {
094            if (LOG.isTraceEnabled()) {
095                LOG.trace("{}Recording duration: {} millis for exchange: {}", new Object[]{type != null ? type + ": " : "", duration, exchange});
096            }
097    
098            if (!exchange.isFailed() && exchange.getException() == null) {
099                counter.completedExchange(exchange, duration);
100            } else {
101                counter.failedExchange(exchange);
102            }
103        }
104    
105        public String getType() {
106            return type;
107        }
108    
109        public void setType(String type) {
110            this.type = type;
111        }
112    
113        @Override
114        public String getTraceLabel() {
115            if (processor instanceof Traceable) {
116                return ((Traceable)processor).getTraceLabel();
117            } else {
118                return "";
119            }
120            
121        }
122    }