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: 771041 $ 034 */ 035 public class InstrumentationInterceptStrategy implements InterceptStrategy { 036 037 private Map<ProcessorDefinition, PerformanceCounter> registeredCounters; 038 039 public InstrumentationInterceptStrategy(Map<ProcessorDefinition, PerformanceCounter> registeredCounters) { 040 this.registeredCounters = registeredCounters; 041 } 042 043 public Processor wrapProcessorInInterceptors(ProcessorDefinition processorDefinition, Processor target, Processor nextTarget) throws Exception { 044 // dont double wrap it 045 if (target instanceof InstrumentationProcessor) { 046 return target; 047 } 048 049 // only wrap a performance counter if we have it registered in JMX by the jmx agent 050 PerformanceCounter counter = registeredCounters.get(processorDefinition); 051 if (counter != null) { 052 InstrumentationProcessor wrapper = new InstrumentationProcessor(counter); 053 wrapper.setProcessor(target); 054 wrapper.setType(processorDefinition.getShortName()); 055 // remove to not double wrap it 056 registeredCounters.remove(processorDefinition); 057 return wrapper; 058 } 059 060 return target; 061 } 062 063 @Override 064 public String toString() { 065 return "Instrument"; 066 } 067 }