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.processor.aggregate;
018    
019    import java.util.Collections;
020    import java.util.Map;
021    import java.util.Set;
022    import java.util.concurrent.ConcurrentHashMap;
023    
024    import org.apache.camel.CamelContext;
025    import org.apache.camel.Exchange;
026    import org.apache.camel.spi.AggregationRepository;
027    import org.apache.camel.support.ServiceSupport;
028    
029    /**
030     * A memory based {@link org.apache.camel.spi.AggregationRepository} which stores in memory only.
031     *
032     * @version 
033     */
034    public class MemoryAggregationRepository extends ServiceSupport implements AggregationRepository {
035        private final Map<String, Exchange> cache = new ConcurrentHashMap<String, Exchange>();
036    
037        public Exchange add(CamelContext camelContext, String key, Exchange exchange) {
038            return cache.put(key, exchange);
039        }
040    
041        public Exchange get(CamelContext camelContext, String key) {
042            return cache.get(key);
043        }
044    
045        public void remove(CamelContext camelContext, String key, Exchange exchange) {
046            cache.remove(key);
047        }
048    
049        public void confirm(CamelContext camelContext, String exchangeId) {
050            // noop
051        }
052    
053        public Set<String> getKeys() {
054            // do not allow edits to the set
055            return Collections.unmodifiableSet(cache.keySet());
056        }
057    
058        @Override
059        protected void doStart() throws Exception {
060        }
061    
062        @Override
063        protected void doStop() throws Exception {
064            cache.clear();
065        }
066    
067    }