Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
QueueLoadBalancer |
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| 0.0;0 |
1 | /** |
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2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
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3 | * contributor license agreements. See the NOTICE file distributed with |
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4 | * this work for additional information regarding copyright ownership. |
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5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
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6 | * (the "License"); you may not use this file except in compliance with |
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7 | * the License. You may obtain a copy of the License at |
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8 | * |
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9 | * http://www.apache.org/licenses/LICENSE-2.0 |
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10 | * |
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11 | * Unless required by applicable law or agreed to in writing, software |
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12 | * distributed under the License is distributed on an "AS IS" BASIS, |
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13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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14 | * See the License for the specific language governing permissions and |
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15 | * limitations under the License. |
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16 | */ |
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17 | package org.apache.camel.processor.loadbalancer; |
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18 | ||
19 | import java.util.List; |
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20 | ||
21 | import org.apache.camel.Exchange; |
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22 | import org.apache.camel.Processor; |
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23 | ||
24 | /** |
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25 | * A base class for {@link LoadBalancer} implementations which choose a single |
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26 | * destination for each exchange (rather like JMS Queues) |
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27 | * |
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28 | * @version $Revision: 1.1 $ |
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29 | */ |
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30 | 0 | public abstract class QueueLoadBalancer extends LoadBalancerSupport { |
31 | ||
32 | public void process(Exchange exchange) throws Exception { |
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33 | 0 | List<Processor> list = getProcessors(); |
34 | 0 | if (list.isEmpty()) { |
35 | 0 | throw new IllegalStateException("No processors available to process " + exchange); |
36 | } |
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37 | 0 | Processor processor = chooseProcessor(list, exchange); |
38 | 0 | if (processor == null) { |
39 | 0 | throw new IllegalStateException("No processors could be chosen to process " + exchange); |
40 | } else { |
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41 | 0 | processor.process(exchange); |
42 | } |
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43 | 0 | } |
44 | ||
45 | protected abstract Processor chooseProcessor(List<Processor> processors, Exchange exchange); |
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46 | } |