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.spi;
018
019 import org.apache.camel.Processor;
020 import org.apache.camel.model.ProcessorDefinition;
021
022 /**
023 * The purpose of this interface is to allow an implementation to wrap
024 * processors in a route with interceptors. For example, a possible
025 * usecase is to gather performance statistics at the processor's level.
026 *
027 * @version $Revision: 770908 $
028 */
029 public interface InterceptStrategy {
030
031 /**
032 * This method is invoked by
033 * {@link ProcessorDefinition#wrapProcessor(RouteContext, Processor)}
034 * to give the implementor an opportunity to wrap the target processor
035 * in a route.
036 *
037 * @param processorDefinition the object that invokes this method
038 * @param target the processor to be wrapped
039 * @param nextTarget the next processor to be routed to
040 * @return processor wrapped with an interceptor or not wrapped
041 * @throws Exception can be thrown
042 */
043 Processor wrapProcessorInInterceptors(ProcessorDefinition processorDefinition,
044 Processor target, Processor nextTarget) throws Exception;
045 }