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.AsyncCallback; 022 import org.apache.camel.AsyncProcessor; 023 import org.apache.camel.Exchange; 024 import org.apache.camel.NoTypeConversionAvailableException; 025 import org.apache.camel.Processor; 026 import org.apache.camel.converter.stream.StreamCache; 027 import org.apache.camel.model.InterceptorRef; 028 import org.apache.camel.model.InterceptorType; 029 import org.apache.camel.processor.DelegateProcessor; 030 import org.apache.camel.util.AsyncProcessorHelper; 031 import org.apache.camel.util.MessageHelper; 032 033 /** 034 * {@link DelegateProcessor} that converts a message into a re-readable format 035 */ 036 public class StreamCachingInterceptor extends DelegateProcessor implements AsyncProcessor { 037 038 public StreamCachingInterceptor() { 039 super(); 040 } 041 042 public StreamCachingInterceptor(Processor processor) { 043 this(); 044 setProcessor(processor); 045 } 046 047 @Override 048 public String toString() { 049 return "StreamCachingInterceptor(" + processor + ")"; 050 } 051 052 /** 053 * Remove the {@link StreamCachingInterceptor} type of interceptor from the given list of interceptors 054 * 055 * @param interceptors the list of interceptors 056 */ 057 public static void noStreamCaching(List<InterceptorType> interceptors) { 058 for (int i = 0; i < interceptors.size(); i++) { 059 InterceptorType interceptor = interceptors.get(i); 060 if (interceptor instanceof InterceptorRef 061 && ((InterceptorRef)interceptor).getInterceptor() instanceof StreamCachingInterceptor) { 062 interceptors.remove(interceptor); 063 } 064 } 065 } 066 067 @Override 068 public void process(Exchange exchange) throws Exception { 069 AsyncProcessorHelper.process(this, exchange); 070 } 071 072 public boolean process(Exchange exchange, AsyncCallback callback) { 073 try { 074 StreamCache newBody = exchange.getIn().getBody(StreamCache.class); 075 if (newBody != null) { 076 exchange.getIn().setBody(newBody); 077 } 078 MessageHelper.resetStreamCache(exchange.getIn()); 079 } catch (NoTypeConversionAvailableException ex) { 080 // ignore if in is not of StreamCache type 081 } 082 return proceed(exchange, callback); 083 } 084 085 public boolean proceed(Exchange exchange, AsyncCallback callback) { 086 if (getProcessor() instanceof AsyncProcessor) { 087 return ((AsyncProcessor) getProcessor()).process(exchange, callback); 088 } else { 089 try { 090 getProcessor().process(exchange); 091 } catch (Throwable e) { 092 exchange.setException(e); 093 } 094 // false means processing of the exchange asynchronously, 095 callback.done(true); 096 return true; 097 } 098 } 099 }