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.ProcessorDefinition;
023 import org.apache.camel.spi.InterceptStrategy;
024
025 /**
026 * This strategy class wraps targeted processors with a
027 * {@link InstrumentationProcessor}. Each InstrumentationProcessor has an
028 * embedded {@link PerformanceCounter} for monitoring performance metrics.
029 * <p/>
030 * This class looks up a map to determine which PerformanceCounter should go into the
031 * InstrumentationProcessor for any particular target processor.
032 *
033 * @version $Revision: 750806 $
034 */
035 public class InstrumentationInterceptStrategy implements InterceptStrategy {
036
037 private Map<ProcessorDefinition, PerformanceCounter> counterMap;
038
039 public InstrumentationInterceptStrategy(Map<ProcessorDefinition, PerformanceCounter> counterMap) {
040 this.counterMap = counterMap;
041 }
042
043 public Processor wrapProcessorInInterceptors(ProcessorDefinition processorType, Processor target) throws Exception {
044 Processor retval = target;
045 PerformanceCounter counter = counterMap.get(processorType);
046
047 if (counter != null) {
048 InstrumentationProcessor wrapper = new InstrumentationProcessor(counter);
049 wrapper.setProcessor(target);
050 retval = wrapper;
051 }
052
053 return retval;
054 }
055
056 }