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.Endpoint;
020    import org.apache.camel.Processor;
021    import org.apache.camel.impl.DefaultConsumer;
022    
023    /**
024     * The direct consumer.
025     *
026     * @version $Revision: 881804 $
027     */
028    public class DirectConsumer extends DefaultConsumer {
029    
030        private DirectEndpoint endpoint;
031    
032        public DirectConsumer(Endpoint endpoint, Processor processor) {
033            super(endpoint, processor);
034            this.endpoint = (DirectEndpoint) endpoint;
035        }
036    
037        @Override
038        public void start() throws Exception {
039            // only add as consumer if not already registered
040            if (!endpoint.getConsumers().contains(this)) {
041                if (!endpoint.getConsumers().isEmpty()) {
042                    throw new IllegalStateException("Endpoint " + endpoint.getEndpointUri() + " only allows 1 active consumer but you attempted to start a 2nd consumer.");
043                }
044                endpoint.getConsumers().add(this);
045            }
046            super.start();
047        }
048    
049        @Override
050        public void stop() throws Exception {
051            super.stop();
052            endpoint.getConsumers().remove(this);
053        }
054    
055    }