Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
ServiceSupport |
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| 1.2857142857142858;1.286 |
1 | /** |
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2 | * |
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3 | * Licensed to the Apache Software Foundation (ASF) under one or more |
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4 | * contributor license agreements. See the NOTICE file distributed with |
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5 | * this work for additional information regarding copyright ownership. |
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6 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
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7 | * (the "License"); you may not use this file except in compliance with |
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8 | * the License. You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | package org.apache.camel.impl; |
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19 | ||
20 | import java.util.concurrent.atomic.AtomicBoolean; |
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21 | ||
22 | import org.apache.camel.Service; |
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23 | ||
24 | /** |
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25 | * A useful base class which ensures that a service is only initialized once and provides some helper methods for |
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26 | * enquiring of its status |
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27 | * |
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28 | * @version $Revision: 534063 $ |
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29 | */ |
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30 | 642 | public abstract class ServiceSupport implements Service { |
31 | 642 | private AtomicBoolean started = new AtomicBoolean(false); |
32 | 642 | private AtomicBoolean stopping = new AtomicBoolean(false); |
33 | 642 | private AtomicBoolean stopped = new AtomicBoolean(false); |
34 | ||
35 | public void start() throws Exception { |
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36 | 383 | if (started.compareAndSet(false, true)) { |
37 | 339 | doStart(); |
38 | } |
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39 | 383 | } |
40 | ||
41 | public void stop() throws Exception { |
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42 | 522 | if (stopped.compareAndSet(false, true)) { |
43 | 479 | stopping.set(true); |
44 | try { |
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45 | 479 | doStop(); |
46 | } |
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47 | finally { |
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48 | 479 | stopped.set(true); |
49 | 479 | started.set(false); |
50 | 479 | stopping.set(false); |
51 | 479 | } |
52 | } |
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53 | 522 | } |
54 | ||
55 | /** |
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56 | * @return true if this service has been started |
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57 | */ |
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58 | public boolean isStarted() { |
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59 | 103 | return started.get(); |
60 | } |
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61 | ||
62 | /** |
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63 | * @return true if this service is in the process of closing |
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64 | */ |
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65 | public boolean isStopping() { |
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66 | 10 | return stopping.get(); |
67 | } |
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68 | ||
69 | ||
70 | /** |
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71 | * @return true if this service is closed |
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72 | */ |
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73 | public boolean isStopped() { |
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74 | 3 | return stopped.get(); |
75 | } |
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76 | ||
77 | protected abstract void doStart() throws Exception; |
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78 | ||
79 | protected abstract void doStop() throws Exception; |
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80 | ||
81 | } |