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| <h5>Coverage Report - com.google.enterprise.adaptor.BlockingQueueBatcher</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.BlockingQueueBatcher.html">BlockingQueueBatcher</a></td><td><table cellpadding="0px" cellspacing="0px" class="percentgraph"><tr class="percentgraph"><td align="right" class="percentgraph" width="40">1</td><td class="percentgraph"><div class="percentgraph"><div class="greenbar" style="width:95px"><span class="text">19/20</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">6/6</span></div></div></td></tr></table></td><td class="value"><span class="hidden">3.0;</span>3</td></tr> |
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| </table> |
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| <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 2013 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> com.google.common.annotations.VisibleForTesting;</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="keyword">import</span> java.util.Collection;</pre></td></tr> |
| <tr> <td class="numLine"> 20</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">import</span> java.util.concurrent.BlockingQueue;</pre></td></tr> |
| <tr> <td class="numLine"> 21</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">import</span> java.util.concurrent.TimeUnit;</pre></td></tr> |
| <tr> <td class="numLine"> 22</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLine"> 23</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">/** Batches elements from a BlockingQueue. */</span></pre></td></tr> |
| <tr> <td class="numLine"> 24</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">class</span> BlockingQueueBatcher {</pre></td></tr> |
| <tr> <td class="numLine"> 25</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> @VisibleForTesting</pre></td></tr> |
| <tr> <td class="numLineCover"> 26</td> <td class="nbHitsCovered"> 1</td> <td class="src"><pre class="src"> <span class="keyword">static</span> RelativeTimeProvider timeProvider = <span class="keyword">new</span> SystemRelativeTimeProvider();</pre></td></tr> |
| <tr> <td class="numLine"> 27</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLine"> 28</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// Prevent instantiation.</span></pre></td></tr> |
| <tr> <td class="numLineCover"> 29</td> <td class="nbHitsUncovered"> 0</td> <td class="src"><pre class="src"><span class="srcUncovered"> <span class="keyword">private</span> BlockingQueueBatcher() {}</span></pre></td></tr> |
| <tr> <td class="numLine"> 30</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLine"> 31</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">/**</span></pre></td></tr> |
| <tr> <td class="numLine"> 32</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * Read a batch-worth of elements from {@code queue}, placing them in {@code</span></pre></td></tr> |
| <tr> <td class="numLine"> 33</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * batch}, blocking until a batch is ready. No element will be delayed waiting</span></pre></td></tr> |
| <tr> <td class="numLine"> 34</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * for the batch to complete longer than {@code maxLatency}. Latency should</span></pre></td></tr> |
| <tr> <td class="numLine"> 35</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * not be confused with a timeout for the overall call, since the latency</span></pre></td></tr> |
| <tr> <td class="numLine"> 36</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * applies only once an element arrives and begins the moment the first</span></pre></td></tr> |
| <tr> <td class="numLine"> 37</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * element arrives.</span></pre></td></tr> |
| <tr> <td class="numLine"> 38</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> *</span></pre></td></tr> |
| <tr> <td class="numLine"> 39</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * <p>At least one element will be added to {@code batch}, except if an</span></pre></td></tr> |
| <tr> <td class="numLine"> 40</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * exception is thrown.</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="numLine"> 42</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * <p>Uses of this method that reuse {@code batch} should not forget to remove</span></pre></td></tr> |
| <tr> <td class="numLine"> 43</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * items from the collection after they are consumed. Otherwise, they will</span></pre></td></tr> |
| <tr> <td class="numLine"> 44</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * accumulate.</span></pre></td></tr> |
| <tr> <td class="numLine"> 45</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> *</span></pre></td></tr> |
| <tr> <td class="numLine"> 46</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * @return number of elements added to {@code batch}</span></pre></td></tr> |
| <tr> <td class="numLine"> 47</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> * @throws InterruptedException if interrupted while waiting</span></pre></td></tr> |
| <tr> <td class="numLine"> 48</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment"> */</span></pre></td></tr> |
| <tr> <td class="numLine"> 49</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">public</span> <span class="keyword">static</span> <T> <span class="keyword">int</span> take(BlockingQueue<T> queue,</pre></td></tr> |
| <tr> <td class="numLine"> 50</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> Collection<? <span class="keyword">super</span> T> batch, <span class="keyword">int</span> maxBatchSize, <span class="keyword">long</span> maxLatency,</pre></td></tr> |
| <tr> <td class="numLine"> 51</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> TimeUnit maxLatencyUnit) <span class="keyword">throws</span> InterruptedException {</pre></td></tr> |
| <tr> <td class="numLineCover"> 52</td> <td class="nbHitsCovered"> 19</td> <td class="src"><pre class="src"> <span class="keyword">long</span> maxLatencyNanos = maxLatencyUnit.toNanos(maxLatency);</pre></td></tr> |
| <tr> <td class="numLine"> 53</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLineCover"> 54</td> <td class="nbHitsCovered"> 19</td> <td class="src"><pre class="src"> <span class="keyword">int</span> curBatchSize = 0;</pre></td></tr> |
| <tr> <td class="numLineCover"> 55</td> <td class="nbHitsCovered"> 19</td> <td class="src"><pre class="src"> <span class="keyword">long</span> stopBatchTimeNanos = -1;</pre></td></tr> |
| <tr> <td class="numLine"> 56</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLine"> 57</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// The loop flow is 1) block, 2) drain queue, 3) possibly consume batch.</span></pre></td></tr> |
| <tr> <td class="numLine"> 58</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="keyword">while</span> (<span class="keyword">true</span>) {</pre></td></tr> |
| <tr> <td class="numLineCover"> 59</td> <td class="nbHitsCovered"> 23</td> <td class="src"><pre class="src"> <span class="keyword">boolean</span> timeout = <span class="keyword">false</span>;</pre></td></tr> |
| <tr> <td class="numLineCover"> 60</td> <td class="nbHitsCovered"><a title="Line 60: Conditional coverage 100% (2/2)."> 23</a></td> <td class="src"><pre class="src"> <a title="Line 60: Conditional coverage 100% (2/2)."> <span class="keyword">if</span> (stopBatchTimeNanos == -1) {</a></pre></td></tr> |
| <tr> <td class="numLine"> 61</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// Start of new batch. Block for the first item of this batch.</span></pre></td></tr> |
| <tr> <td class="numLineCover"> 62</td> <td class="nbHitsCovered"> 19</td> <td class="src"><pre class="src"> batch.add(queue.take());</pre></td></tr> |
| <tr> <td class="numLineCover"> 63</td> <td class="nbHitsCovered"> 5</td> <td class="src"><pre class="src"> curBatchSize++;</pre></td></tr> |
| <tr> <td class="numLineCover"> 64</td> <td class="nbHitsCovered"> 5</td> <td class="src"><pre class="src"> stopBatchTimeNanos = timeProvider.relativeTime(TimeUnit.NANOSECONDS)</pre></td></tr> |
| <tr> <td class="numLine"> 65</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> + maxLatencyNanos;</pre></td></tr> |
| <tr> <td class="numLine"> 66</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> } <span class="keyword">else</span> {</pre></td></tr> |
| <tr> <td class="numLine"> 67</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// Continue existing batch. Block until an item is in the queue or the</span></pre></td></tr> |
| <tr> <td class="numLine"> 68</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// batch timeout expires.</span></pre></td></tr> |
| <tr> <td class="numLineCover"> 69</td> <td class="nbHitsCovered"> 4</td> <td class="src"><pre class="src"> T element = queue.poll(</pre></td></tr> |
| <tr> <td class="numLine"> 70</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> stopBatchTimeNanos</pre></td></tr> |
| <tr> <td class="numLine"> 71</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> - timeProvider.relativeTime(TimeUnit.NANOSECONDS),</pre></td></tr> |
| <tr> <td class="numLine"> 72</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> TimeUnit.NANOSECONDS);</pre></td></tr> |
| <tr> <td class="numLineCover"> 73</td> <td class="nbHitsCovered"><a title="Line 73: Conditional coverage 100% (2/2)."> 3</a></td> <td class="src"><pre class="src"> <a title="Line 73: Conditional coverage 100% (2/2)."> <span class="keyword">if</span> (element == <span class="keyword">null</span>) {</a></pre></td></tr> |
| <tr> <td class="numLine"> 74</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// Timeout occurred.</span></pre></td></tr> |
| <tr> <td class="numLineCover"> 75</td> <td class="nbHitsCovered"> 1</td> <td class="src"><pre class="src"> <span class="keyword">break</span>;</pre></td></tr> |
| <tr> <td class="numLine"> 76</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> }</pre></td></tr> |
| <tr> <td class="numLineCover"> 77</td> <td class="nbHitsCovered"> 2</td> <td class="src"><pre class="src"> batch.add(element);</pre></td></tr> |
| <tr> <td class="numLineCover"> 78</td> <td class="nbHitsCovered"> 2</td> <td class="src"><pre class="src"> curBatchSize++;</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="numLineCover"> 80</td> <td class="nbHitsCovered"> 7</td> <td class="src"><pre class="src"> curBatchSize += queue.drainTo(batch, maxBatchSize - curBatchSize);</pre></td></tr> |
| <tr> <td class="numLine"> 81</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> </pre></td></tr> |
| <tr> <td class="numLineCover"> 82</td> <td class="nbHitsCovered"><a title="Line 82: Conditional coverage 100% (2/2)."> 7</a></td> <td class="src"><pre class="src"> <a title="Line 82: Conditional coverage 100% (2/2)."> <span class="keyword">if</span> (curBatchSize >= maxBatchSize) {</a></pre></td></tr> |
| <tr> <td class="numLine"> 83</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> <span class="comment">// End current batch.</span></pre></td></tr> |
| <tr> <td class="numLineCover"> 84</td> <td class="nbHitsCovered"> 3</td> <td class="src"><pre class="src"> <span class="keyword">break</span>;</pre></td></tr> |
| <tr> <td class="numLine"> 85</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> }</pre></td></tr> |
| <tr> <td class="numLineCover"> 86</td> <td class="nbHitsCovered"> 4</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> |
| <tr> <td class="numLineCover"> 88</td> <td class="nbHitsCovered"> 4</td> <td class="src"><pre class="src"> <span class="keyword">return</span> curBatchSize;</pre></td></tr> |
| <tr> <td class="numLine"> 89</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> }</pre></td></tr> |
| <tr> <td class="numLine"> 90</td> <td class="nbHits"> </td> |
| <td class="src"><pre class="src"> }</pre></td></tr> |
| </table> |
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