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.queue;
018    
019    import java.util.HashMap;
020    import java.util.concurrent.BlockingQueue;
021    import java.util.concurrent.LinkedBlockingQueue;
022    
023    import org.apache.camel.CamelContext;
024    import org.apache.camel.Component;
025    
026    /**
027     * Represents the component that manages {@link QueueEndpoint}.  It holds the 
028     * list of named queues that queue endpoints reference.
029     *
030     * @org.apache.xbean.XBean
031     * @version $Revision: 519973 $
032     */
033    public class QueueComponent<E> implements Component<E> {
034            
035        private HashMap<String, BlockingQueue<E>> registry = new HashMap<String, BlockingQueue<E>>();
036        private CamelContext container;
037    
038        public void setContext(CamelContext container) {
039            this.container = container;
040        }
041    
042            synchronized public BlockingQueue<E> getOrCreateQueue(String uri) {
043                    BlockingQueue<E> queue = registry.get(uri);
044                    if( queue == null ) {
045                            queue = createQueue();
046                            registry.put(uri, queue);
047                    }
048                    return queue;
049            }
050    
051            protected BlockingQueue<E> createQueue() {
052                    return new LinkedBlockingQueue<E>();
053            }
054    
055            public CamelContext getContainer() {
056                    return container;
057            }
058    
059    
060    }