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.processor.interceptor; 018 019 import java.util.List; 020 021 import org.apache.camel.CamelContext; 022 import org.apache.camel.Processor; 023 import org.apache.camel.impl.DefaultCamelContext; 024 import org.apache.camel.model.ProcessorType; 025 import org.apache.camel.spi.InterceptStrategy; 026 027 /** 028 * An interceptor strategy for tracing routes 029 * 030 * @version $Revision: 45363 $ 031 */ 032 public class Tracer implements InterceptStrategy { 033 034 private TraceFormatter formatter = new TraceFormatter(); 035 private boolean enabled = true; 036 /** 037 * A helper method to return the Tracer instance for a given {@link CamelContext} if one is enabled 038 * 039 * @param context the camel context the debugger is connected to 040 * @return the debugger or null if none can be found 041 */ 042 public static Tracer getTracer(CamelContext context) { 043 if (context instanceof DefaultCamelContext) { 044 DefaultCamelContext defaultCamelContext = (DefaultCamelContext) context; 045 List<InterceptStrategy> list = defaultCamelContext.getInterceptStrategies(); 046 for (InterceptStrategy interceptStrategy : list) { 047 if (interceptStrategy instanceof Tracer) { 048 return (Tracer)interceptStrategy; 049 } 050 } 051 } 052 return null; 053 } 054 055 public Processor wrapProcessorInInterceptors(ProcessorType processorType, Processor target) throws Exception { 056 // Force the creation of an id, otherwise the id is not available when the trace formatter is 057 // outputting trace information 058 String id = processorType.idOrCreate(); 059 return new TraceInterceptor(processorType, target, this); 060 } 061 062 public TraceFormatter getFormatter() { 063 return formatter; 064 } 065 066 public void setFormatter(TraceFormatter formatter) { 067 this.formatter = formatter; 068 } 069 070 public void setEnabled(boolean flag) { 071 enabled = flag; 072 } 073 074 public boolean isEnabled() { 075 return enabled; 076 } 077 }