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 * <p/>
031 * <br/>Implementors beware that this endpoint creates producers and consumers which
032 * doesn't allow you full control of its lifecycle as a {@link org.apache.camel.Service}
033 * or {@link org.apache.camel.SuspendableService} would do.
034 * If your producers/consumers need more control of its lifecycle its adviced instead to extend
035 * {@link org.apache.camel.impl.DefaultEndpoint}, {@link org.apache.camel.impl.DefaultProducer}
036 * and {@link org.apache.camel.impl.DefaultConsumer}.
037 *
038 * @version
039 */
040 public class ProcessorEndpoint extends DefaultPollingEndpoint {
041 private Processor processor;
042
043 protected ProcessorEndpoint() {
044 }
045
046 @SuppressWarnings("deprecation")
047 public ProcessorEndpoint(String endpointUri, CamelContext context, Processor processor) {
048 super(endpointUri);
049 this.setCamelContext(context);
050 this.processor = processor;
051 }
052
053 public ProcessorEndpoint(String endpointUri, Component component, Processor processor) {
054 super(endpointUri, component);
055 this.processor = processor;
056 }
057
058 protected ProcessorEndpoint(String endpointUri, Component component) {
059 super(endpointUri, component);
060 }
061
062 @Deprecated
063 public ProcessorEndpoint(String endpointUri, Processor processor) {
064 super(endpointUri);
065 this.processor = processor;
066 }
067
068 public Producer createProducer() throws Exception {
069 return new DefaultProducer(this) {
070 public void process(Exchange exchange) throws Exception {
071 onExchange(exchange);
072 }
073 };
074 }
075
076 @Override
077 public PollingConsumer createPollingConsumer() throws Exception {
078 PollingConsumer answer = new ProcessorPollingConsumer(this, getProcessor());
079 configurePollingConsumer(answer);
080 return answer;
081 }
082
083 public Processor getProcessor() throws Exception {
084 if (processor == null) {
085 processor = createProcessor();
086 }
087 return processor;
088 }
089
090 public void setProcessor(Processor processor) {
091 this.processor = processor;
092 }
093
094 protected Processor createProcessor() throws Exception {
095 return new Processor() {
096 public void process(Exchange exchange) throws Exception {
097 onExchange(exchange);
098 }
099 };
100 }
101
102 protected void onExchange(Exchange exchange) throws Exception {
103 getProcessor().process(exchange);
104 }
105
106 public boolean isSingleton() {
107 return true;
108 }
109 }