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 @SuppressWarnings("unchecked")
032 public Processor wrapProcessorInInterceptors(ProcessorDefinition processorDefinition, 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 List<InterceptStrategy> list = context.getInterceptStrategies();
045 for (InterceptStrategy interceptStrategy : list) {
046 if (interceptStrategy instanceof StreamCaching) {
047 return (StreamCaching)interceptStrategy;
048 }
049 }
050 return null;
051 }
052
053 /**
054 * Remove the {@link StreamCachingInterceptor} from the given list of interceptors
055 *
056 * @param interceptors the list of interceptors
057 */
058 public static void noStreamCaching(List<InterceptStrategy> interceptors) {
059 for (InterceptStrategy strategy : interceptors) {
060 if (strategy instanceof StreamCachingInterceptor) {
061 interceptors.remove(strategy);
062 }
063 }
064 }
065
066 @Override
067 public String toString() {
068 return "StreamCaching";
069 }
070 }