| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.camel.impl; |
| |
| import java.util.concurrent.ScheduledExecutorService; |
| |
| import org.apache.camel.Endpoint; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.PollingConsumer; |
| import org.apache.camel.Processor; |
| |
| /** |
| * A default implementation of an event driven {@link org.apache.camel.Consumer} which uses the |
| * {@link PollingConsumer} |
| * |
| * @version $Revision$ |
| */ |
| public class DefaultScheduledPollConsumer extends ScheduledPollConsumer { |
| private PollingConsumer pollingConsumer; |
| |
| public DefaultScheduledPollConsumer(DefaultEndpoint defaultEndpoint, Processor processor) { |
| super(defaultEndpoint, processor); |
| } |
| |
| public DefaultScheduledPollConsumer(Endpoint endpoint, Processor processor, ScheduledExecutorService executor) { |
| super(endpoint, processor, executor); |
| } |
| |
| protected void poll() throws Exception { |
| while (isPollAllowed()) { |
| Exchange exchange = pollingConsumer.receiveNoWait(); |
| if (exchange == null) { |
| break; |
| } |
| |
| // if the result of the polled exchange has output we should create a new exchange and |
| // use the output as input to the next processor |
| if (exchange.hasOut()) { |
| // lets create a new exchange |
| Exchange newExchange = getEndpoint().createExchange(); |
| newExchange.getIn().copyFrom(exchange.getOut()); |
| exchange = newExchange; |
| } |
| getProcessor().process(exchange); |
| } |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| pollingConsumer = getEndpoint().createPollingConsumer(); |
| super.doStart(); |
| } |
| |
| @Override |
| protected void doStop() throws Exception { |
| super.doStop(); |
| if (pollingConsumer != null) { |
| pollingConsumer.stop(); |
| } |
| } |
| } |