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.ProcessorType; 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 /** 037 * {@inheritDoc} 038 */ 039 @SuppressWarnings("unchecked") 040 public Processor wrapProcessorInInterceptors(ProcessorType processorType, Processor target) throws Exception { 041 return new StreamCachingInterceptor(target); 042 } 043 044 /** 045 * Enable stream caching for a RouteContext 046 * 047 * @param context the route context 048 */ 049 public static void enable(RouteContext context) { 050 for (InterceptStrategy strategy : context.getInterceptStrategies()) { 051 if (strategy instanceof StreamCaching) { 052 return; 053 } 054 } 055 context.addInterceptStrategy(new StreamCaching()); 056 } 057 058 /** 059 * Disable stream caching for a RouteContext 060 * 061 * @param context the route context 062 */ 063 public static void disable(RouteContext context) { 064 for (InterceptStrategy strategy : context.getInterceptStrategies()) { 065 if (strategy instanceof StreamCaching) { 066 context.getInterceptStrategies().remove(strategy); 067 return; 068 } 069 } 070 } 071 }