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 org.apache.camel.AsyncCallback; 020 import org.apache.camel.CamelException; 021 import org.apache.camel.Exchange; 022 import org.apache.camel.Processor; 023 import org.apache.camel.processor.DelegateAsyncProcessor; 024 025 public class HandleFaultInterceptor extends DelegateAsyncProcessor { 026 027 public HandleFaultInterceptor() { 028 } 029 030 public HandleFaultInterceptor(Processor processor) { 031 super(processor); 032 } 033 034 @Override 035 public String toString() { 036 return "HandleFaultInterceptor[" + processor + "]"; 037 } 038 039 @Override 040 public boolean process(final Exchange exchange, final AsyncCallback callback) { 041 return processor.process(exchange, new AsyncCallback() { 042 public void done(boolean doneSync) { 043 try { 044 // handle fault after we are done 045 handleFault(exchange); 046 } finally { 047 // and let the original callback know we are done as well 048 callback.done(doneSync); 049 } 050 } 051 }); 052 } 053 054 /** 055 * Handles the fault message by converting it to an Exception 056 */ 057 protected void handleFault(Exchange exchange) { 058 // Take the fault message out before we keep on going 059 if (exchange.hasOut() && exchange.getOut().isFault()) { 060 final Object faultBody = exchange.getOut().getBody(); 061 if (faultBody != null && exchange.getException() == null) { 062 // remove fault as we are converting it to an exception 063 exchange.setOut(null); 064 if (faultBody instanceof Throwable) { 065 exchange.setException((Throwable) faultBody); 066 } else { 067 // wrap it in an exception 068 exchange.setException(new CamelException(faultBody.toString())); 069 } 070 } 071 } 072 } 073 074 }