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.Endpoint;
020 import org.apache.camel.Exchange;
021 import org.apache.camel.PollingConsumer;
022 import org.apache.camel.Processor;
023 import org.apache.camel.RuntimeExchangeException;
024 import org.apache.camel.util.ServiceHelper;
025
026 /**
027 * A simple implementation of {@link PollingConsumer} which just uses
028 * a {@link Processor}. This implementation does not support timeout based
029 * receive methods such as {@link #receive(long)}
030 *
031 * @version $Revision: 640438 $
032 */
033 public class ProcessorPollingConsumer extends PollingConsumerSupport {
034 private Processor processor;
035
036 public ProcessorPollingConsumer(Endpoint endpoint, Processor processor) {
037 super(endpoint);
038 this.processor = processor;
039 }
040
041 protected void doStart() throws Exception {
042 ServiceHelper.startService(processor);
043 }
044
045 protected void doStop() throws Exception {
046 ServiceHelper.stopService(processor);
047 }
048
049 public Exchange receive() {
050 Exchange exchange = getEndpoint().createExchange();
051 try {
052 processor.process(exchange);
053 } catch (Exception e) {
054 throw new RuntimeExchangeException(e, exchange);
055 }
056 return exchange;
057 }
058
059 public Exchange receiveNoWait() {
060 return receive();
061 }
062
063 public Exchange receive(long timeout) {
064 return receive();
065 }
066 }