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.model.ProcessorDefinition; 024 import org.apache.camel.spi.InterceptStrategy; 025 026 /** 027 * {@link InterceptStrategy} implementation to configure stream caching on a RouteContext 028 */ 029 public final class StreamCaching implements InterceptStrategy { 030 031 public Processor wrapProcessorInInterceptors(CamelContext context, ProcessorDefinition<?> definition, 032 Processor target, Processor nextTarget) throws Exception { 033 return new StreamCachingInterceptor(target); 034 } 035 036 /** 037 * A helper method to return the StreamCaching instance 038 * for a given {@link org.apache.camel.CamelContext} if one is enabled 039 * 040 * @param context the camel context the stream cache is connected to 041 * @return the stream cache or null if none can be found 042 */ 043 public static StreamCaching getStreamCaching(CamelContext context) { 044 return getStreamCaching(context.getInterceptStrategies()); 045 } 046 047 /** 048 * A helper method to return the StreamCaching instance 049 * for a given list of interceptors 050 * 051 * @param interceptors the list of interceptors 052 * @return the stream cache or null if none can be found 053 */ 054 public static StreamCaching getStreamCaching(List<InterceptStrategy> interceptors) { 055 for (InterceptStrategy interceptStrategy : interceptors) { 056 if (interceptStrategy instanceof StreamCaching) { 057 return (StreamCaching)interceptStrategy; 058 } 059 } 060 return null; 061 } 062 063 /** 064 * Remove the {@link StreamCachingInterceptor} from the given list of interceptors 065 * 066 * @param interceptors the list of interceptors 067 */ 068 public static void noStreamCaching(List<InterceptStrategy> interceptors) { 069 for (InterceptStrategy strategy : interceptors) { 070 if (strategy instanceof StreamCaching) { 071 interceptors.remove(strategy); 072 } 073 } 074 } 075 076 @Override 077 public String toString() { 078 return "StreamCaching"; 079 } 080 }