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.DefaultConsumer;
023    import org.apache.camel.impl.DefaultProducer;
024    import org.apache.camel.impl.converter.AsyncProcessorTypeConverter;
025    import org.apache.commons.logging.Log;
026    import org.apache.commons.logging.LogFactory;
027    
028    /**
029     * The direct producer.
030     *
031     * @version $Revision: 567 $
032     */
033    public class DirectProducer<E extends Exchange> extends DefaultProducer implements AsyncProcessor {
034        private static final transient Log LOG = LogFactory.getLog(DirectProducer.class);
035        private DirectEndpoint<E> endpoint;
036    
037        public DirectProducer(DirectEndpoint<E> endpoint) {
038            super(endpoint);
039            this.endpoint = endpoint;
040        }
041    
042        public void process(Exchange exchange) throws Exception {
043            if (endpoint.getConsumers().isEmpty()) {
044                LOG.warn("No getConsumers() available on " + this + " for " + exchange);
045            } else {
046                for (DefaultConsumer<E> consumer : endpoint.getConsumers()) {
047                    consumer.getProcessor().process(exchange);
048                }
049            }
050        }
051    
052        public boolean process(Exchange exchange, AsyncCallback callback) {
053            int size = endpoint.getConsumers().size();
054            if (size == 0) {
055                LOG.warn("No getConsumers() available on " + this + " for " + exchange);
056            } else if (size == 1) {
057                DefaultConsumer<E> consumer = endpoint.getConsumers().get(0);
058                AsyncProcessor processor = AsyncProcessorTypeConverter.convert(consumer.getProcessor());
059                return processor.process(exchange, callback);
060            } else if (size > 1) {
061                // Too hard to do multiple async.. do it sync
062                try {
063                    for (DefaultConsumer<E> consumer : endpoint.getConsumers()) {
064                        consumer.getProcessor().process(exchange);
065                    }
066                } catch (Throwable error) {
067                    exchange.setException(error);
068                }
069            }
070            callback.done(true);
071            return true;
072        }
073    }