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    /**
020     * Delegates to another {@link org.apache.camel.management.PerformanceCounter}.
021     * <p/>
022     * This is used to allow Camel to pre initialize these delegate performance counters
023     * when Camel creates the actual route from the model. Then later as the various
024     * processors, routes etc. is created and registered in the {@link org.apache.camel.spi.LifecycleStrategy}
025     * then we link this to the real {@link org.apache.camel.management.mbean.ManagedPerformanceCounter} mbean
026     * so the mbean can gather statistics.
027     * <p/>
028     * This delegation is needed as how Camel is designed to register services in the
029     * {@link org.apache.camel.spi.LifecycleStrategy} in various stages.
030     *
031     * @version $Revision: 823448 $
032     */
033    public class DelegatePerformanceCounter implements PerformanceCounter {
034    
035        private PerformanceCounter counter;
036        private boolean statisticsEnabled;
037    
038        public DelegatePerformanceCounter() {
039        }
040    
041        public void setCounter(PerformanceCounter counter) {
042            this.counter = counter;
043            // init statistics based on the real counter based on how we got initialized
044            this.counter.setStatisticsEnabled(statisticsEnabled);
045        }
046    
047        public void completedExchange(long time) {
048            counter.completedExchange(time);
049        }
050    
051        public void failedExchange() {
052            counter.failedExchange();
053        }
054    
055        public boolean isStatisticsEnabled() {
056            // statistics is only considered enabled if we have a counter to delegate to
057            // otherwise we do not want to gather statistics (we are just a delegate with noone to delegate to)
058            return counter != null && counter.isStatisticsEnabled();
059        }
060    
061        public void setStatisticsEnabled(boolean statisticsEnabled) {
062            if (counter != null) {
063                counter.setStatisticsEnabled(statisticsEnabled);
064            } else {
065                this.statisticsEnabled = statisticsEnabled;
066            }
067        }
068    }