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.impl;
018    
019    import org.apache.camel.CamelContext;
020    import org.apache.camel.Component;
021    import org.apache.camel.Exchange;
022    import org.apache.camel.PollingConsumer;
023    import org.apache.camel.Processor;
024    import org.apache.camel.Producer;
025    
026    /**
027     * An endpoint which allows exchanges to be sent into it which just invokes a
028     * given {@link Processor}. This component does not support the use of
029     * consumers.
030     *
031     * @version $Revision: 36321 $
032     */
033    public class ProcessorEndpoint extends DefaultPollingEndpoint<Exchange> {
034        private final Processor processor;
035    
036        public ProcessorEndpoint(String endpointUri, CamelContext context, Processor processor) {
037            super(endpointUri, context);
038            this.processor = processor;
039        }
040    
041        public ProcessorEndpoint(String endpointUri, Component component, Processor processor) {
042            super(endpointUri, component);
043            this.processor = processor;
044        }
045    
046    
047        public Producer<Exchange> createProducer() throws Exception {
048            return new DefaultProducer<Exchange>(this) {
049                public void process(Exchange exchange) throws Exception {
050                    onExchange(exchange);
051                }
052            };
053        }
054    
055        @Override
056        public PollingConsumer<Exchange> createPollingConsumer() throws Exception {
057            return new ProcessorPollingConsumer(this, getProcessor());
058        }
059    
060        public Processor getProcessor() {
061            if (processor == null) {
062                return new Processor() {
063                    public void process(Exchange exchange) throws Exception {
064                        onExchange(exchange);
065                    }
066                };
067            }
068            return processor;
069        }
070    
071        protected void onExchange(Exchange exchange) throws Exception {
072            processor.process(exchange);
073        }
074    
075        public boolean isSingleton() {
076            return true;
077        }
078    }