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.component.direct;
018    
019    import org.apache.camel.AsyncCallback;
020    import org.apache.camel.AsyncProcessor;
021    import org.apache.camel.Exchange;
022    import org.apache.camel.impl.DefaultAsyncProducer;
023    import org.apache.camel.util.AsyncProcessorConverterHelper;
024    import org.apache.camel.util.AsyncProcessorHelper;
025    import org.slf4j.Logger;
026    import org.slf4j.LoggerFactory;
027    
028    /**
029     * The direct producer.
030     *
031     * @version 
032     */
033    public class DirectProducer extends DefaultAsyncProducer {
034        private static final transient Logger LOG = LoggerFactory.getLogger(DirectProducer.class);
035        private final DirectEndpoint endpoint;
036    
037        public DirectProducer(DirectEndpoint endpoint) {
038            super(endpoint);
039            this.endpoint = endpoint;
040        }
041    
042        public void process(Exchange exchange) throws Exception {
043            if (endpoint.getConsumer() == null) {
044                LOG.warn("No consumers available on endpoint: " + endpoint + " to process: " + exchange);
045                throw new DirectConsumerNotAvailableException("No consumers available on endpoint: " + endpoint, exchange);
046            } else {
047                endpoint.getConsumer().getProcessor().process(exchange);
048            }
049        }
050    
051        public boolean process(Exchange exchange, AsyncCallback callback) {
052            if (endpoint.getConsumer() == null) {
053                LOG.warn("No consumers available on endpoint: " + endpoint + " to process: " + exchange);
054                // indicate its done synchronously
055                exchange.setException(new DirectConsumerNotAvailableException("No consumers available on endpoint: " + endpoint, exchange));
056                callback.done(true);
057                return true;
058            } else {
059                AsyncProcessor processor = AsyncProcessorConverterHelper.convert(endpoint.getConsumer().getProcessor());
060                return AsyncProcessorHelper.process(processor, exchange, callback);
061            }
062        }
063    
064    }