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.Processor; 020 import org.apache.camel.model.ProcessorDefinition; 021 import org.apache.camel.spi.InterceptStrategy; 022 import org.apache.camel.spi.RouteContext; 023 024 /** 025 * {@link InterceptStrategy} implementation to configure stream caching on a RouteContext 026 */ 027 public final class StreamCaching implements InterceptStrategy { 028 029 /* 030 * Hide constructor -- instances will be created through static enable() methods 031 */ 032 private StreamCaching() { 033 super(); 034 } 035 036 @SuppressWarnings("unchecked") 037 public Processor wrapProcessorInInterceptors(ProcessorDefinition processorType, Processor target) throws Exception { 038 return new StreamCachingInterceptor(target); 039 } 040 041 /** 042 * Enable stream caching for a RouteContext 043 * 044 * @param context the route context 045 */ 046 public static void enable(RouteContext context) { 047 for (InterceptStrategy strategy : context.getInterceptStrategies()) { 048 if (strategy instanceof StreamCaching) { 049 return; 050 } 051 } 052 context.addInterceptStrategy(new StreamCaching()); 053 } 054 055 /** 056 * Disable stream caching for a RouteContext 057 * 058 * @param context the route context 059 */ 060 public static void disable(RouteContext context) { 061 for (InterceptStrategy strategy : context.getInterceptStrategies()) { 062 if (strategy instanceof StreamCaching) { 063 context.getInterceptStrategies().remove(strategy); 064 return; 065 } 066 } 067 } 068 }