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; 018 019 import org.apache.camel.AsyncCallback; 020 import org.apache.camel.Exchange; 021 import org.apache.camel.Processor; 022 import org.apache.camel.Traceable; 023 import org.apache.camel.util.ExchangeHelper; 024 import org.slf4j.Logger; 025 import org.slf4j.LoggerFactory; 026 027 /** 028 * Processor to handle do finally supporting asynchronous routing engine 029 * 030 * @version 031 */ 032 public class FinallyProcessor extends DelegateAsyncProcessor implements Traceable { 033 034 private static final Logger LOG = LoggerFactory.getLogger(FinallyProcessor.class); 035 036 public FinallyProcessor(Processor processor) { 037 super(processor); 038 } 039 040 @Override 041 public boolean process(final Exchange exchange, final AsyncCallback callback) { 042 // clear exception so finally block can be executed 043 final Exception e = exchange.getException(); 044 exchange.setException(null); 045 // but store the caught exception as a property 046 if (e != null) { 047 exchange.setProperty(Exchange.EXCEPTION_CAUGHT, e); 048 } 049 // store the last to endpoint as the failure endpoint 050 if (exchange.getProperty(Exchange.FAILURE_ENDPOINT) == null) { 051 exchange.setProperty(Exchange.FAILURE_ENDPOINT, exchange.getProperty(Exchange.TO_ENDPOINT)); 052 } 053 054 boolean sync = processor.process(exchange, new AsyncCallback() { 055 public void done(boolean doneSync) { 056 if (e == null) { 057 exchange.removeProperty(Exchange.FAILURE_ENDPOINT); 058 } else { 059 // set exception back on exchange 060 exchange.setException(e); 061 exchange.setProperty(Exchange.EXCEPTION_CAUGHT, e); 062 } 063 064 if (!doneSync) { 065 // signal callback to continue routing async 066 ExchangeHelper.prepareOutToIn(exchange); 067 LOG.trace("Processing complete for exchangeId: {} >>> {}", exchange.getExchangeId(), exchange); 068 } 069 callback.done(doneSync); 070 } 071 }); 072 return sync; 073 } 074 075 @Override 076 public String toString() { 077 return "Finally{" + getProcessor() + "}"; 078 } 079 080 public String getTraceLabel() { 081 return "finally"; 082 } 083 }