Coverage Report - org.apache.camel.processor.Pipeline
 
Classes in this File Line Coverage Branch Coverage Complexity
Pipeline
95% 
100% 
0
 
 1  
 /**
 2  
  *
 3  
  * Licensed to the Apache Software Foundation (ASF) under one or more
 4  
  * contributor license agreements.  See the NOTICE file distributed with
 5  
  * this work for additional information regarding copyright ownership.
 6  
  * The ASF licenses this file to You under the Apache License, Version 2.0
 7  
  * (the "License"); you may not use this file except in compliance with
 8  
  * the License.  You may obtain a copy of the License at
 9  
  *
 10  
  * http://www.apache.org/licenses/LICENSE-2.0
 11  
  *
 12  
  * Unless required by applicable law or agreed to in writing, software
 13  
  * distributed under the License is distributed on an "AS IS" BASIS,
 14  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 15  
  * See the License for the specific language governing permissions and
 16  
  * limitations under the License.
 17  
  */
 18  
 package org.apache.camel.processor;
 19  
 
 20  
 import org.apache.camel.Endpoint;
 21  
 import org.apache.camel.Exchange;
 22  
 import org.apache.camel.Processor;
 23  
 import org.apache.camel.Producer;
 24  
 
 25  
 import java.util.Collection;
 26  
 
 27  
 /**
 28  
  * Creates a Pipeline pattern where the output of the previous step is sent as input to the next step when working
 29  
  * with request/response message exchanges.
 30  
  *
 31  
  * @version $Revision: 534145 $
 32  
  */
 33  
 public class Pipeline extends MulticastProcessor implements Processor {
 34  
     public Pipeline(Collection<Endpoint> endpoints) throws Exception {
 35  1
         super(endpoints);
 36  1
     }
 37  
 
 38  
     public void process(Exchange exchange) throws Exception {
 39  1
         Exchange nextExchange = exchange;
 40  1
         boolean first = true;
 41  1
         for (Producer producer : getProducers()) {
 42  4
             if (first) {
 43  1
                 first = false;
 44  1
             }
 45  
             else {
 46  3
                 nextExchange = createNextExchange(producer, nextExchange);
 47  
             }
 48  4
             producer.process(nextExchange);
 49  4
         }
 50  1
     }
 51  
 
 52  
     /**
 53  
      * Strategy method to create the next exchange from the
 54  
      *
 55  
      * @param producer         the producer used to send to the endpoint
 56  
      * @param previousExchange the previous exchange
 57  
      * @return a new exchange
 58  
      */
 59  
     protected Exchange createNextExchange(Producer producer, Exchange previousExchange) {
 60  3
         Exchange answer = producer.createExchange(previousExchange);
 61  
 
 62  
         // now lets set the input of the next exchange to the output of the previous message if it is not null
 63  3
         Object output = previousExchange.getOut().getBody();
 64  3
         if (output != null) {
 65  3
             answer.getIn().setBody(output);
 66  
         }
 67  3
         return answer;
 68  
     }
 69  
 
 70  
     /**
 71  
      * Strategy method to copy the exchange before sending to another endpoint. Derived classes such as the
 72  
      * {@link Pipeline} will not clone the exchange
 73  
      *
 74  
      * @param exchange
 75  
      * @return the current exchange if no copying is required such as for a pipeline otherwise a new copy of the exchange is returned.
 76  
      */
 77  
     protected Exchange copyExchangeStrategy(Exchange exchange) {
 78  0
         return exchange.copy();
 79  
     }
 80  
 
 81  
     @Override
 82  
     public String toString() {
 83  1
         return "Pipeline" + getEndpoints();
 84  
     }
 85  
 }