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     * @deprecated no longer in use, will be removed in next Camel release.
030     */
031    @Deprecated
032    public final class StreamCaching implements InterceptStrategy {
033        
034        public Processor wrapProcessorInInterceptors(CamelContext context, ProcessorDefinition<?> definition,
035                                                     Processor target, Processor nextTarget) throws Exception {
036            return new StreamCachingInterceptor(target);
037        }
038        
039        /**
040         * A helper method to return the StreamCaching instance
041         * for a given {@link org.apache.camel.CamelContext} if one is enabled
042         *
043         * @param context the camel context the stream cache is connected to
044         * @return the stream cache or null if none can be found
045         */
046        public static StreamCaching getStreamCaching(CamelContext context) {
047            return getStreamCaching(context.getInterceptStrategies());
048        }
049    
050        /**
051         * A helper method to return the StreamCaching instance
052         * for a given list of interceptors
053         *
054         * @param interceptors the list of interceptors
055         * @return the stream cache or null if none can be found
056         */
057        public static StreamCaching getStreamCaching(List<InterceptStrategy> interceptors) {
058            for (InterceptStrategy interceptStrategy : interceptors) {
059                if (interceptStrategy instanceof StreamCaching) {
060                    return (StreamCaching)interceptStrategy;
061                }
062            }
063            return null;
064        }
065    
066        /**
067         * Remove the {@link StreamCachingInterceptor} from the given list of interceptors
068         *
069         * @param interceptors the list of interceptors
070         */
071        public static void noStreamCaching(List<InterceptStrategy> interceptors) {
072            for (InterceptStrategy strategy : interceptors) {
073                if (strategy instanceof StreamCaching) {
074                    interceptors.remove(strategy);
075                }
076            }
077        }
078    
079        @Override
080        public String toString() {
081            return "StreamCaching";
082        }
083    }