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| <h5>Coverage Report - com.google.enterprise.adaptor.OneAtATimeRunnable</h5> |
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| <table class="report"> |
| <thead><tr> <td class="heading">Classes in this File</td> <td class="heading"><a class="dfn" href="help.html" onclick="popupwindow('help.html'); return false;">Line Coverage</a></td> <td class="heading"><a class="dfn" href="help.html" onclick="popupwindow('help.html'); return false;">Branch Coverage</a></td> <td class="heading"><a class="dfn" href="help.html" onclick="popupwindow('help.html'); return false;">Complexity</a></td></tr></thead> |
| <tr><td><a href="com.google.enterprise.adaptor.OneAtATimeRunnable.html">OneAtATimeRunnable</a></td><td><table cellpadding="0px" cellspacing="0px" class="percentgraph"><tr class="percentgraph"><td align="right" class="percentgraph" width="40">0</td><td class="percentgraph"><div class="percentgraph"><div class="greenbar" style="width:100px"><span class="text">19/19</span></div></div></td></tr></table></td><td><table cellpadding="0px" cellspacing="0px" class="percentgraph"><tr class="percentgraph"><td align="right" class="percentgraph" width="40">0</td><td class="percentgraph"><div class="percentgraph"><div class="greenbar" style="width:100px"><span class="text">8/8</span></div></div></td></tr></table></td><td class="value"><span class="hidden">2.0;</span>2</td></tr> |
| |
| </table> |
| <div class="separator"> </div> |
| <table cellspacing="0" cellpadding="0" class="src"> |
| <tr> <td class="numLine"> 1</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// Copyright 2011 Google Inc. All Rights Reserved.</span></pre></td></tr> |
| <tr> <td class="numLine"> 2</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">//</span></pre></td></tr> |
| <tr> <td class="numLine"> 3</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></pre></td></tr> |
| <tr> <td class="numLine"> 4</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// you may not use this file except in compliance with the License.</span></pre></td></tr> |
| <tr> <td class="numLine"> 5</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// You may obtain a copy of the License at</span></pre></td></tr> |
| <tr> <td class="numLine"> 6</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">//</span></pre></td></tr> |
| <tr> <td class="numLine"> 7</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></pre></td></tr> |
| <tr> <td class="numLine"> 8</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">//</span></pre></td></tr> |
| <tr> <td class="numLine"> 9</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></pre></td></tr> |
| <tr> <td class="numLine"> 10</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></pre></td></tr> |
| <tr> <td class="numLine"> 11</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></pre></td></tr> |
| <tr> <td class="numLine"> 12</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// See the License for the specific language governing permissions and</span></pre></td></tr> |
| <tr> <td class="numLine"> 13</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// limitations under the License.</span></pre></td></tr> |
| <tr> <td class="numLine"> 14</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLine"> 15</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">package</span> com.google.enterprise.adaptor;</pre></td></tr> |
| <tr> <td class="numLine"> 16</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLine"> 17</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">import</span> java.util.concurrent.atomic.AtomicReference;</pre></td></tr> |
| <tr> <td class="numLine"> 18</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLine"> 19</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">/**</span></pre></td></tr> |
| <tr> <td class="numLine"> 20</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * Ensures that at most one thread is executing a particular runnable. The first</span></pre></td></tr> |
| <tr> <td class="numLine"> 21</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * thread that issues {@code run()} will cause the execution of {@code</span></pre></td></tr> |
| <tr> <td class="numLine"> 22</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * runnable}, but further simultaneous calls to {@code run()} will execute</span></pre></td></tr> |
| <tr> <td class="numLine"> 23</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * {@code alreadyRunningRunnable} and return immediately.</span></pre></td></tr> |
| <tr> <td class="numLine"> 24</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> *</span></pre></td></tr> |
| <tr> <td class="numLine"> 25</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * <p>This class is thread-safe.</span></pre></td></tr> |
| <tr> <td class="numLine"> 26</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> */</span></pre></td></tr> |
| <tr> <td class="numLine"> 27</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">class</span> OneAtATimeRunnable <span class="keyword">implements</span> Runnable {</pre></td></tr> |
| <tr> <td class="numLine"> 28</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">/**</span></pre></td></tr> |
| <tr> <td class="numLine"> 29</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * We use an atomic reference to a thread to manage the life-cycle of this</span></pre></td></tr> |
| <tr> <td class="numLine"> 30</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * object. Whenever the value is "null" it means we are not currently running</span></pre></td></tr> |
| <tr> <td class="numLine"> 31</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * and a new thread can be started. Whenever we are currently executing we</span></pre></td></tr> |
| <tr> <td class="numLine"> 32</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * store reference to the thread that is executing our {@link #runnable}.</span></pre></td></tr> |
| <tr> <td class="numLine"> 33</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> *</span></pre></td></tr> |
| <tr> <td class="numLine"> 34</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * Life-cycle:</span></pre></td></tr> |
| <tr> <td class="numLine"> 35</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * - {@link #run} is called by an external thread; we check if</span></pre></td></tr> |
| <tr> <td class="numLine"> 36</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * {@link #runningThread} is "null": if true, it means that {@link #runnable}</span></pre></td></tr> |
| <tr> <td class="numLine"> 37</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * is not running, we start a new thread of execution and store reference to</span></pre></td></tr> |
| <tr> <td class="numLine"> 38</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * the new thread of execution, otherwise we run code in</span></pre></td></tr> |
| <tr> <td class="numLine"> 39</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * {@link #alreadyRunningRunnable} to signify that one instance is already</span></pre></td></tr> |
| <tr> <td class="numLine"> 40</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * running.</span></pre></td></tr> |
| <tr> <td class="numLine"> 41</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> */</span></pre></td></tr> |
| <tr> <td class="numLineCover"> 42</td> <td class="nbHitsCovered"> 40</td> <td class="src"><pre class="src"> <span class="keyword">private</span> AtomicReference<Thread> runningThread = <span class="keyword">new</span> AtomicReference<Thread>();</pre></td></tr> |
| <tr> <td class="numLine"> 43</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">private</span> Runnable runnable;</pre></td></tr> |
| <tr> <td class="numLine"> 44</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">private</span> Runnable alreadyRunningRunnable;</pre></td></tr> |
| <tr> <td class="numLine"> 45</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLine"> 46</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">/**</span></pre></td></tr> |
| <tr> <td class="numLine"> 47</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * @param runnable {@code Runnable} to call at most once at a time</span></pre></td></tr> |
| <tr> <td class="numLine"> 48</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * @param alreadyRunningRunnable {@code Runnable} to call if {@link #run} was</span></pre></td></tr> |
| <tr> <td class="numLine"> 49</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * called and {@code runnable} is already running</span></pre></td></tr> |
| <tr> <td class="numLine"> 50</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> */</span></pre></td></tr> |
| <tr> <td class="numLine"> 51</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">public</span> OneAtATimeRunnable(Runnable runnable,</pre></td></tr> |
| <tr> <td class="numLineCover"> 52</td> <td class="nbHitsCovered"> 40</td> <td class="src"><pre class="src"> Runnable alreadyRunningRunnable) {</pre></td></tr> |
| <tr> <td class="numLineCover"> 53</td> <td class="nbHitsCovered"><a title="Line 53: Conditional coverage 100% (4/4) [each condition: 100%, 100%]."> 40</a></td> <td class="src"><pre class="src"> <a title="Line 53: Conditional coverage 100% (4/4) [each condition: 100%, 100%]."> <span class="keyword">if</span> (runnable == <span class="keyword">null</span> || alreadyRunningRunnable == <span class="keyword">null</span>) {</a></pre></td></tr> |
| <tr> <td class="numLineCover"> 54</td> <td class="nbHitsCovered"> 2</td> <td class="src"><pre class="src"> <span class="keyword">throw</span> <span class="keyword">new</span> NullPointerException();</pre></td></tr> |
| <tr> <td class="numLine"> 55</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> }</pre></td></tr> |
| <tr> <td class="numLineCover"> 56</td> <td class="nbHitsCovered"> 38</td> <td class="src"><pre class="src"> <span class="keyword">this</span>.runnable = runnable;</pre></td></tr> |
| <tr> <td class="numLineCover"> 57</td> <td class="nbHitsCovered"> 38</td> <td class="src"><pre class="src"> <span class="keyword">this</span>.alreadyRunningRunnable = alreadyRunningRunnable;</pre></td></tr> |
| <tr> <td class="numLineCover"> 58</td> <td class="nbHitsCovered"> 38</td> <td class="src"><pre class="src"> }</pre></td></tr> |
| <tr> <td class="numLine"> 59</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLine"> 60</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> @Override</pre></td></tr> |
| <tr> <td class="numLine"> 61</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">public</span> <span class="keyword">void</span> run() {</pre></td></tr> |
| <tr> <td class="numLineCover"> 62</td> <td class="nbHitsCovered"> 14</td> <td class="src"><pre class="src"> Thread thisThread = Thread.currentThread();</pre></td></tr> |
| <tr> <td class="numLineCover"> 63</td> <td class="nbHitsCovered"> 14</td> <td class="src"><pre class="src"> <span class="keyword">boolean</span> success = runningThread.compareAndSet(<span class="keyword">null</span>, thisThread);</pre></td></tr> |
| <tr> <td class="numLineCover"> 64</td> <td class="nbHitsCovered"><a title="Line 64: Conditional coverage 100% (2/2)."> 14</a></td> <td class="src"><pre class="src"> <a title="Line 64: Conditional coverage 100% (2/2)."> <span class="keyword">if</span> (!success) {</a></pre></td></tr> |
| <tr> <td class="numLineCover"> 65</td> <td class="nbHitsCovered"> 2</td> <td class="src"><pre class="src"> alreadyRunningRunnable.run();</pre></td></tr> |
| <tr> <td class="numLineCover"> 66</td> <td class="nbHitsCovered"> 2</td> <td class="src"><pre class="src"> <span class="keyword">return</span>;</pre></td></tr> |
| <tr> <td class="numLine"> 67</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> }</pre></td></tr> |
| <tr> <td class="numLine"> 68</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">try</span> {</pre></td></tr> |
| <tr> <td class="numLineCover"> 69</td> <td class="nbHitsCovered"> 12</td> <td class="src"><pre class="src"> runnable.run();</pre></td></tr> |
| <tr> <td class="numLine"> 70</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> } <span class="keyword">finally</span> {</pre></td></tr> |
| <tr> <td class="numLineCover"> 71</td> <td class="nbHitsCovered"> 12</td> <td class="src"><pre class="src"> runningThread.compareAndSet(thisThread, <span class="keyword">null</span>);</pre></td></tr> |
| <tr> <td class="numLineCover"> 72</td> <td class="nbHitsCovered"> 12</td> <td class="src"><pre class="src"> }</pre></td></tr> |
| <tr> <td class="numLineCover"> 73</td> <td class="nbHitsCovered"> 12</td> <td class="src"><pre class="src"> }</pre></td></tr> |
| <tr> <td class="numLine"> 74</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLine"> 75</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">/** {@code true} if the runnable is currently running. */</span></pre></td></tr> |
| <tr> <td class="numLine"> 76</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">public</span> <span class="keyword">boolean</span> isRunning() {</pre></td></tr> |
| <tr> <td class="numLineCover"> 77</td> <td class="nbHitsCovered"><a title="Line 77: Conditional coverage 100% (2/2)."> 12</a></td> <td class="src"><pre class="src"> <a title="Line 77: Conditional coverage 100% (2/2)."> <span class="keyword">return</span> runningThread.get() != <span class="keyword">null</span>;</a></pre></td></tr> |
| <tr> <td class="numLine"> 78</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> }</pre></td></tr> |
| <tr> <td class="numLine"> 79</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLine"> 80</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">public</span> Runnable getRunnable() {</pre></td></tr> |
| <tr> <td class="numLineCover"> 81</td> <td class="nbHitsCovered"> 4</td> <td class="src"><pre class="src"> <span class="keyword">return</span> runnable;</pre></td></tr> |
| <tr> <td class="numLine"> 82</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> }</pre></td></tr> |
| <tr> <td class="numLine"> 83</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLine"> 84</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">public</span> Runnable getAlreadyRunningRunnable() {</pre></td></tr> |
| <tr> <td class="numLineCover"> 85</td> <td class="nbHitsCovered"> 1</td> <td class="src"><pre class="src"> <span class="keyword">return</span> alreadyRunningRunnable;</pre></td></tr> |
| <tr> <td class="numLine"> 86</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> }</pre></td></tr> |
| <tr> <td class="numLine"> 87</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> }</pre></td></tr> |
| </table> |
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