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.ArrayList; 020 import java.util.HashMap; 021 import java.util.List; 022 import java.util.Map; 023 024 import org.apache.camel.CamelContext; 025 import org.apache.camel.Exchange; 026 import org.apache.camel.Processor; 027 import org.apache.camel.impl.DefaultCamelContext; 028 import org.apache.camel.model.ProcessorType; 029 import org.apache.camel.spi.InterceptStrategy; 030 import org.apache.commons.logging.Log; 031 import org.apache.commons.logging.LogFactory; 032 033 /** 034 * An interceptor strategy for debugging and tracing routes 035 * 036 * @version $Revision: 42411 $ 037 */ 038 public class Debugger implements InterceptStrategy { 039 private static final transient Log LOG = LogFactory.getLog(Debugger.class); 040 041 private int exchangeBufferSize = -1; 042 private Map<String, DebugInterceptor> interceptors = new HashMap<String, DebugInterceptor>(); 043 044 /** 045 * A helper method to return the debugger instance for a given {@link CamelContext} if one is enabled 046 * 047 * @param context the camel context the debugger is connected to 048 * @return the debugger or null if none can be found 049 */ 050 public static Debugger getDebugger(CamelContext context) { 051 if (context instanceof DefaultCamelContext) { 052 DefaultCamelContext defaultCamelContext = (DefaultCamelContext) context; 053 List<InterceptStrategy> list = defaultCamelContext.getInterceptStrategies(); 054 for (InterceptStrategy interceptStrategy : list) { 055 if (interceptStrategy instanceof Debugger) { 056 return (Debugger)interceptStrategy; 057 } 058 } 059 } 060 return null; 061 } 062 063 public DebugInterceptor getInterceptor(String id) { 064 return interceptors.get(id); 065 } 066 067 /** 068 * Returns the list of exchanges sent to the given node in the DSL 069 */ 070 public List<Exchange> getExchanges(String id) { 071 DebugInterceptor interceptor = getInterceptor(id); 072 if (interceptor == null) { 073 return null; 074 } else { 075 return interceptor.getExchanges(); 076 } 077 } 078 079 /** 080 * Returns the breakpoint object for the given node in the DSL 081 */ 082 public Breakpoint getBreakpoint(String id) { 083 DebugInterceptor interceptor = getInterceptor(id); 084 if (interceptor == null) { 085 return null; 086 } else { 087 return interceptor.getBreakpoint(); 088 } 089 } 090 091 092 public Processor wrapProcessorInInterceptors(ProcessorType processorType, Processor target) throws Exception { 093 String id = processorType.idOrCreate(); 094 DebugInterceptor interceptor = new DebugInterceptor(processorType, target, createExchangeList(), createExceptionsList()); 095 interceptors.put(id, interceptor); 096 if (LOG.isDebugEnabled()) { 097 LOG.debug("adding interceptor: " + interceptor); 098 } 099 return interceptor; 100 } 101 102 protected List<Exchange> createExchangeList() { 103 if (exchangeBufferSize == 0) { 104 return null; 105 } else if (exchangeBufferSize > 0) { 106 // TODO lets create a non blocking fixed size queue 107 return new ArrayList<Exchange>(); 108 } else { 109 return new ArrayList<Exchange>(); 110 } 111 } 112 113 protected List<ExceptionEvent> createExceptionsList() { 114 // TODO allow some kinda LRU based fixed size list to be used? 115 return new ArrayList<ExceptionEvent>(); 116 } 117 }