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.queue;
018    
019    import java.util.concurrent.BlockingQueue;
020    
021    import org.apache.camel.Consumer;
022    import org.apache.camel.Exchange;
023    import org.apache.camel.Processor;
024    import org.apache.camel.Producer;
025    import org.apache.camel.impl.DefaultEndpoint;
026    import org.apache.camel.impl.DefaultExchange;
027    import org.apache.camel.impl.DefaultProducer;
028    
029    /**
030     * Represents a queue endpoint that uses a {@link BlockingQueue}
031     * object to process inbound exchanges.
032     *
033     * @org.apache.xbean.XBean
034     * @version $Revision: 519973 $
035     */
036    public class QueueEndpoint<E extends Exchange> extends DefaultEndpoint<E> {
037        private BlockingQueue<E> queue;
038    
039        public QueueEndpoint(String uri, QueueComponent<E> component) {
040            super(uri, component);
041            this.queue = component.createQueue();
042        }
043    
044        public Producer<E> createProducer() throws Exception {
045            return new DefaultProducer(this) {
046                public void process(Exchange exchange) {
047                    queue.add(toExchangeType(exchange));
048                }
049            };
050        }
051    
052        public Consumer<E> createConsumer(Processor processor) throws Exception {
053            return new QueueEndpointConsumer<E>(this, processor);
054        }
055    
056        public E createExchange() {
057            // How can we create a specific Exchange if we are generic??
058            // perhaps it would be better if we did not implement this. 
059            return (E) new DefaultExchange(getContext());
060        }
061    
062        public BlockingQueue<E> getQueue() {
063            return queue;
064        }
065        
066            public boolean isSingleton() {
067                    return true;
068            }
069    
070    
071    }