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 }