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.seda;
018    
019    import java.util.HashMap;
020    import java.util.Map;
021    import java.util.concurrent.BlockingQueue;
022    import java.util.concurrent.LinkedBlockingQueue;
023    
024    import org.apache.camel.Endpoint;
025    import org.apache.camel.Exchange;
026    import org.apache.camel.impl.DefaultComponent;
027    
028    /**
029     * An implementation of the <a href="http://camel.apache.org/seda.html">SEDA components</a>
030     * for asynchronous SEDA exchanges on a {@link BlockingQueue} within a CamelContext
031     *
032     * @version $Revision: 795369 $
033     */
034    public class SedaComponent extends DefaultComponent {
035    
036        private final Map<String, BlockingQueue<Exchange>> queues = new HashMap<String, BlockingQueue<Exchange>>();
037    
038        public synchronized BlockingQueue<Exchange> createQueue(String uri, Map parameters) {
039            String key = getQueueKey(uri);
040    
041            if (queues.containsKey(key)) {
042                return queues.get(key);
043            }
044    
045            // create queue
046            int size = getAndRemoveParameter(parameters, "size", Integer.class, 1000);
047            BlockingQueue<Exchange> queue = new LinkedBlockingQueue<Exchange>(size);
048            queues.put(key, queue);
049            return queue;
050        }
051    
052        @Override
053        protected Endpoint createEndpoint(String uri, String remaining, Map parameters) throws Exception {
054            int consumers = getAndRemoveParameter(parameters, "concurrentConsumers", Integer.class, 1);
055            SedaEndpoint answer = new SedaEndpoint(uri, this, createQueue(uri, parameters), consumers);
056            answer.configureProperties(parameters);
057            return answer;
058        }
059    
060        protected String getQueueKey(String uri) {
061            if (uri.contains("?")) {
062                // strip parameters
063                uri = uri.substring(0, uri.indexOf('?'));
064            }
065            return uri;
066        }
067    
068        @Override
069        protected void doStop() throws Exception {
070            queues.clear();
071            super.doStop();
072        }
073    
074    }