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 java.util.Map;
020    
021    import org.apache.camel.Processor;
022    import org.apache.camel.model.ProcessorType;
023    import org.apache.camel.spi.InterceptStrategy;
024    
025    /**
026     * This strategy class wraps targeted processors with
027     * {@link InstrumentationProcessor}.  Each InstrumentationProcessor is
028     * into embeds a {@link PerformanceCounter}.  This class looks up a map
029     * to determine which PerformanceCounter should go into the
030     * InstrumentationProcessor for any particular target processor.
031     *
032     * @version $Revision: 41580 $
033     */
034    public class InstrumentationInterceptStrategy implements InterceptStrategy {
035    
036        private Map<ProcessorType, PerformanceCounter> counterMap;
037    
038        public InstrumentationInterceptStrategy(Map<ProcessorType, PerformanceCounter> counterMap) {
039            this.counterMap = counterMap;
040        }
041    
042        public Processor wrapProcessorInInterceptors(ProcessorType processorType,
043                Processor target) throws Exception {
044    
045            Processor retval = target;
046            PerformanceCounter counter = counterMap.get(processorType);
047    
048            if (counter != null) {
049                InstrumentationProcessor wrapper = new InstrumentationProcessor(counter);
050                wrapper.setProcessor(target);
051                retval = wrapper;
052            }
053    
054            return retval;
055        }
056    
057    }