Coverage Report - org.apache.camel.processor.Aggregator
 
Classes in this File Line Coverage Branch Coverage Complexity
Aggregator
100% 
N/A 
0
 
 1  
 /**
 2  
  * Licensed to the Apache Software Foundation (ASF) under one or more
 3  
  * contributor license agreements.  See the NOTICE file distributed with
 4  
  * this work for additional information regarding copyright ownership.
 5  
  * The ASF licenses this file to You under the Apache License, Version 2.0
 6  
  * (the "License"); you may not use this file except in compliance with
 7  
  * the License.  You may obtain a copy of the License at
 8  
  *
 9  
  *      http://www.apache.org/licenses/LICENSE-2.0
 10  
  *
 11  
  * Unless required by applicable law or agreed to in writing, software
 12  
  * distributed under the License is distributed on an "AS IS" BASIS,
 13  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 14  
  * See the License for the specific language governing permissions and
 15  
  * limitations under the License.
 16  
  */
 17  
 package org.apache.camel.processor;
 18  
 
 19  
 import org.apache.camel.Endpoint;
 20  
 import org.apache.camel.Expression;
 21  
 import org.apache.camel.Processor;
 22  
 import org.apache.camel.processor.aggregate.AggregationCollection;
 23  
 import org.apache.camel.processor.aggregate.AggregationStrategy;
 24  
 
 25  
 /**
 26  
  * An implementation of the <a
 27  
  * href="http://activemq.apache.org/camel/aggregator.html">Aggregator</a>
 28  
  * pattern where a batch of messages are processed (up to a maximum amount or
 29  
  * until some timeout is reached) and messages for the same correlation key are
 30  
  * combined together using some kind of
 31  
  * {@link AggregationStrategy ) (by default the latest message is used) to compress 
 32  
  * many message exchanges * into a smaller number of exchanges. <p/> A good
 33  
  * example of this is stock market data; you may be receiving 30,000
 34  
  * messages/second and you may want to throttle it right down so that multiple
 35  
  * messages for the same stock are combined (or just the latest message is used
 36  
  * and older prices are discarded). Another idea is to combine line item
 37  
  * messages together into a single invoice message.
 38  
  * 
 39  
  * @version $Revision: 1.1 $
 40  
  * @param correlationExpression the expression used to calculate the correlation
 41  
  *                key. For a JMS message this could be the expression
 42  
  *                <code>header("JMSDestination")</code> or
 43  
  *                <code>header("JMSCorrelationID")</code>
 44  
  */
 45  
 public class Aggregator extends BatchProcessor {
 46  
     public Aggregator(Endpoint endpoint, Processor processor, Expression correlationExpression,
 47  
                       AggregationStrategy aggregationStrategy) {
 48  3
         this(endpoint, processor, new AggregationCollection(correlationExpression, aggregationStrategy));
 49  3
     }
 50  
 
 51  
     public Aggregator(Endpoint endpoint, Processor processor, AggregationCollection collection) {
 52  3
         super(endpoint, processor, collection);
 53  3
     }
 54  
 
 55  
     @Override
 56  
     public String toString() {
 57  6
         return "Aggregator[to: " + getProcessor() + "]";
 58  
     }
 59  
 }