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 */ 017package org.apache.camel.impl; 018 019import org.apache.camel.Endpoint; 020import org.apache.camel.Exchange; 021import org.apache.camel.Processor; 022 023/** 024 * A base class for selector-based producers. 025 */ 026public abstract class BaseSelectorProducer extends DefaultProducer { 027 protected BaseSelectorProducer(Endpoint endpoint) { 028 super(endpoint); 029 } 030 031 @Override 032 public void process(Exchange exchange) throws Exception { 033 final Processor processor = getProcessor(exchange); 034 if (processor != null) { 035 processor.process(exchange); 036 } else { 037 onMissingProcessor(exchange); 038 } 039 } 040 041 /** 042 * Determine the processor to use to handle the exchange. 043 * 044 * @param exchange the message exchange 045 * @return the processor to processes the message exchange 046 * @throws Exception 047 */ 048 protected abstract Processor getProcessor(Exchange exchange) throws Exception; 049 050 /** 051 * Invoked when no processor has been defined to process the message exchnage. 052 * 053 * @param exchange the message exchange 054 * @throws Exception 055 */ 056 protected abstract void onMissingProcessor(Exchange exchange) throws Exception; 057}