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| <a class="jxr_linenumber" name="1" href="#1">1</a> <em class="jxr_comment">/*</em> |
| <a class="jxr_linenumber" name="2" href="#2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em> |
| <a class="jxr_linenumber" name="3" href="#3">3</a> <em class="jxr_comment"> * or more contributor license agreements. See the NOTICE file</em> |
| <a class="jxr_linenumber" name="4" href="#4">4</a> <em class="jxr_comment"> * distributed with this work for additional information</em> |
| <a class="jxr_linenumber" name="5" href="#5">5</a> <em class="jxr_comment"> * regarding copyright ownership. The ASF licenses this file</em> |
| <a class="jxr_linenumber" name="6" href="#6">6</a> <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em> |
| <a class="jxr_linenumber" name="7" href="#7">7</a> <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em> |
| <a class="jxr_linenumber" name="8" href="#8">8</a> <em class="jxr_comment"> * with the License. You may obtain a copy of the License at</em> |
| <a class="jxr_linenumber" name="9" href="#9">9</a> <em class="jxr_comment"> *</em> |
| <a class="jxr_linenumber" name="10" href="#10">10</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em> |
| <a class="jxr_linenumber" name="11" href="#11">11</a> <em class="jxr_comment"> *</em> |
| <a class="jxr_linenumber" name="12" href="#12">12</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em> |
| <a class="jxr_linenumber" name="13" href="#13">13</a> <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em> |
| <a class="jxr_linenumber" name="14" href="#14">14</a> <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em> |
| <a class="jxr_linenumber" name="15" href="#15">15</a> <em class="jxr_comment"> * See the License for the specific language governing permissions and</em> |
| <a class="jxr_linenumber" name="16" href="#16">16</a> <em class="jxr_comment"> * limitations under the License.</em> |
| <a class="jxr_linenumber" name="17" href="#17">17</a> <em class="jxr_comment"> */</em> |
| <a class="jxr_linenumber" name="18" href="#18">18</a> <strong class="jxr_keyword">package</strong> org.apache.hadoop.hbase.regionserver; |
| <a class="jxr_linenumber" name="19" href="#19">19</a> |
| <a class="jxr_linenumber" name="20" href="#20">20</a> <strong class="jxr_keyword">import</strong> org.apache.phoenix.thirdparty.com.google.common.annotations.VisibleForTesting; |
| <a class="jxr_linenumber" name="21" href="#21">21</a> <strong class="jxr_keyword">import</strong> org.apache.phoenix.thirdparty.com.google.common.base.Optional; |
| <a class="jxr_linenumber" name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> org.apache.phoenix.thirdparty.com.google.common.collect.Iterators; |
| <a class="jxr_linenumber" name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> org.apache.phoenix.thirdparty.com.google.common.collect.PeekingIterator; |
| <a class="jxr_linenumber" name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> org.apache.commons.collections4.map.LRUMap; |
| <a class="jxr_linenumber" name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> org.apache.omid.HBaseShims; |
| <a class="jxr_linenumber" name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> org.apache.omid.committable.CommitTable; |
| <a class="jxr_linenumber" name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> org.apache.omid.committable.CommitTable.Client; |
| <a class="jxr_linenumber" name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> org.apache.omid.committable.CommitTable.CommitTimestamp; |
| <a class="jxr_linenumber" name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> org.apache.omid.transaction.CellUtils; |
| <a class="jxr_linenumber" name="30" href="#30">30</a> <strong class="jxr_keyword">import</strong> org.apache.omid.transaction.CellInfo; |
| <a class="jxr_linenumber" name="31" href="#31">31</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.Cell; |
| <a class="jxr_linenumber" name="32" href="#32">32</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.CellUtil; |
| <a class="jxr_linenumber" name="33" href="#33">33</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.KeyValue; |
| <a class="jxr_linenumber" name="34" href="#34">34</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.client.Get; |
| <a class="jxr_linenumber" name="35" href="#35">35</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.client.Result; |
| <a class="jxr_linenumber" name="36" href="#36">36</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.coprocessor.ObserverContext; |
| <a class="jxr_linenumber" name="37" href="#37">37</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment; |
| <a class="jxr_linenumber" name="38" href="#38">38</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.util.Bytes; |
| <a class="jxr_linenumber" name="39" href="#39">39</a> <strong class="jxr_keyword">import</strong> org.slf4j.Logger; |
| <a class="jxr_linenumber" name="40" href="#40">40</a> <strong class="jxr_keyword">import</strong> org.slf4j.LoggerFactory; |
| <a class="jxr_linenumber" name="41" href="#41">41</a> |
| <a class="jxr_linenumber" name="42" href="#42">42</a> <strong class="jxr_keyword">import</strong> java.io.IOException; |
| <a class="jxr_linenumber" name="43" href="#43">43</a> <strong class="jxr_keyword">import</strong> java.util.ArrayList; |
| <a class="jxr_linenumber" name="44" href="#44">44</a> <strong class="jxr_keyword">import</strong> java.util.Collections; |
| <a class="jxr_linenumber" name="45" href="#45">45</a> <strong class="jxr_keyword">import</strong> java.util.HashMap; |
| <a class="jxr_linenumber" name="46" href="#46">46</a> <strong class="jxr_keyword">import</strong> java.util.List; |
| <a class="jxr_linenumber" name="47" href="#47">47</a> <strong class="jxr_keyword">import</strong> java.util.Map; |
| <a class="jxr_linenumber" name="48" href="#48">48</a> |
| <a class="jxr_linenumber" name="49" href="#49">49</a> <strong class="jxr_keyword">import</strong> java.util.SortedMap; |
| <a class="jxr_linenumber" name="50" href="#50">50</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.ExecutionException; |
| <a class="jxr_linenumber" name="51" href="#51">51</a> |
| <a class="jxr_linenumber" name="52" href="#52">52</a> <strong class="jxr_keyword">import</strong> <strong class="jxr_keyword">static</strong> org.apache.omid.committable.CommitTable.CommitTimestamp.Location.SHADOW_CELL; |
| <a class="jxr_linenumber" name="53" href="#53">53</a> |
| <a class="jxr_linenumber" name="54" href="#54">54</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/hadoop/hbase/regionserver/CompactorScanner.html">CompactorScanner</a> <strong class="jxr_keyword">implements</strong> InternalScanner { |
| <a class="jxr_linenumber" name="55" href="#55">55</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Logger LOG = LoggerFactory.getLogger(CompactorScanner.<strong class="jxr_keyword">class</strong>); |
| <a class="jxr_linenumber" name="56" href="#56">56</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> InternalScanner internalScanner; |
| <a class="jxr_linenumber" name="57" href="#57">57</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> CommitTable.Client commitTableClient; |
| <a class="jxr_linenumber" name="58" href="#58">58</a> |
| <a class="jxr_linenumber" name="59" href="#59">59</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> isMajorCompaction; |
| <a class="jxr_linenumber" name="60" href="#60">60</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> retainNonTransactionallyDeletedCells; |
| <a class="jxr_linenumber" name="61" href="#61">61</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> lowWatermark; |
| <a class="jxr_linenumber" name="62" href="#62">62</a> |
| <a class="jxr_linenumber" name="63" href="#63">63</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Region hRegion; |
| <a class="jxr_linenumber" name="64" href="#64">64</a> |
| <a class="jxr_linenumber" name="65" href="#65">65</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> hasMoreRows = false; |
| <a class="jxr_linenumber" name="66" href="#66">66</a> <strong class="jxr_keyword">private</strong> List<Cell> currentRowWorthValues = <strong class="jxr_keyword">new</strong> ArrayList<Cell>(); |
| <a class="jxr_linenumber" name="67" href="#67">67</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> LRUMap<Long ,Optional<CommitTimestamp>> commitCache; |
| <a class="jxr_linenumber" name="68" href="#68">68</a> |
| <a class="jxr_linenumber" name="69" href="#69">69</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/hadoop/hbase/regionserver/CompactorScanner.html">CompactorScanner</a>(ObserverContext<RegionCoprocessorEnvironment> e, |
| <a class="jxr_linenumber" name="70" href="#70">70</a> InternalScanner internalScanner, |
| <a class="jxr_linenumber" name="71" href="#71">71</a> <a href="../../../../../org/apache/omid/committable/InMemoryCommitTable.html">Client</a> commitTableClient, |
| <a class="jxr_linenumber" name="72" href="#72">72</a> <strong class="jxr_keyword">boolean</strong> isMajorCompaction, |
| <a class="jxr_linenumber" name="73" href="#73">73</a> <strong class="jxr_keyword">boolean</strong> preserveNonTransactionallyDeletedCells) <strong class="jxr_keyword">throws</strong> IOException { |
| <a class="jxr_linenumber" name="74" href="#74">74</a> <strong class="jxr_keyword">this</strong>.internalScanner = internalScanner; |
| <a class="jxr_linenumber" name="75" href="#75">75</a> <strong class="jxr_keyword">this</strong>.commitTableClient = commitTableClient; |
| <a class="jxr_linenumber" name="76" href="#76">76</a> <strong class="jxr_keyword">this</strong>.isMajorCompaction = isMajorCompaction; |
| <a class="jxr_linenumber" name="77" href="#77">77</a> <strong class="jxr_keyword">this</strong>.retainNonTransactionallyDeletedCells = preserveNonTransactionallyDeletedCells; |
| <a class="jxr_linenumber" name="78" href="#78">78</a> <strong class="jxr_keyword">this</strong>.lowWatermark = getLowWatermarkFromCommitTable(); |
| <a class="jxr_linenumber" name="79" href="#79">79</a> <em class="jxr_comment">// Obtain the table in which the scanner is going to operate</em> |
| <a class="jxr_linenumber" name="80" href="#80">80</a> <strong class="jxr_keyword">this</strong>.hRegion = HBaseShims.getRegionCoprocessorRegion(e.getEnvironment()); |
| <a class="jxr_linenumber" name="81" href="#81">81</a> commitCache = <strong class="jxr_keyword">new</strong> LRUMap<>(1000); |
| <a class="jxr_linenumber" name="82" href="#82">82</a> LOG.info(<span class="jxr_string">"Scanner cleaning up uncommitted txs older than LW [{}] in region [{}]"</span>, |
| <a class="jxr_linenumber" name="83" href="#83">83</a> lowWatermark, hRegion.getRegionInfo()); |
| <a class="jxr_linenumber" name="84" href="#84">84</a> } |
| <a class="jxr_linenumber" name="85" href="#85">85</a> |
| <a class="jxr_linenumber" name="86" href="#86">86</a> @Override |
| <a class="jxr_linenumber" name="87" href="#87">87</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> next(List<Cell> results) <strong class="jxr_keyword">throws</strong> IOException { |
| <a class="jxr_linenumber" name="88" href="#88">88</a> <strong class="jxr_keyword">return</strong> next(results, -1); |
| <a class="jxr_linenumber" name="89" href="#89">89</a> } |
| <a class="jxr_linenumber" name="90" href="#90">90</a> |
| <a class="jxr_linenumber" name="91" href="#91">91</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> next(List<Cell> result, ScannerContext scannerContext) <strong class="jxr_keyword">throws</strong> IOException { |
| <a class="jxr_linenumber" name="92" href="#92">92</a> <strong class="jxr_keyword">int</strong> limit = scannerContext.getBatchLimit(); |
| <a class="jxr_linenumber" name="93" href="#93">93</a> <strong class="jxr_keyword">return</strong> next(result, limit); |
| <a class="jxr_linenumber" name="94" href="#94">94</a> } |
| <a class="jxr_linenumber" name="95" href="#95">95</a> |
| <a class="jxr_linenumber" name="96" href="#96">96</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> next(List<Cell> result, <strong class="jxr_keyword">int</strong> limit) <strong class="jxr_keyword">throws</strong> IOException { |
| <a class="jxr_linenumber" name="97" href="#97">97</a> |
| <a class="jxr_linenumber" name="98" href="#98">98</a> <strong class="jxr_keyword">if</strong> (currentRowWorthValues.isEmpty()) { |
| <a class="jxr_linenumber" name="99" href="#99">99</a> <em class="jxr_comment">// 1) Read next row</em> |
| <a class="jxr_linenumber" name="100" href="#100">100</a> List<Cell> scanResult = <strong class="jxr_keyword">new</strong> ArrayList<Cell>(); |
| <a class="jxr_linenumber" name="101" href="#101">101</a> hasMoreRows = internalScanner.next(scanResult); |
| <a class="jxr_linenumber" name="102" href="#102">102</a> <strong class="jxr_keyword">if</strong> (LOG.isTraceEnabled()) { |
| <a class="jxr_linenumber" name="103" href="#103">103</a> LOG.trace(<span class="jxr_string">"Row: Result {} limit {} more rows? {}"</span>, scanResult, limit, hasMoreRows); |
| <a class="jxr_linenumber" name="104" href="#104">104</a> } |
| <a class="jxr_linenumber" name="105" href="#105">105</a> <em class="jxr_comment">// 2) Traverse result list separating normal cells from shadow</em> |
| <a class="jxr_linenumber" name="106" href="#106">106</a> <em class="jxr_comment">// cells and building a map to access easily the shadow cells.</em> |
| <a class="jxr_linenumber" name="107" href="#107">107</a> SortedMap<Cell, Optional<Cell>> cellToSc = CellUtils.mapCellsToShadowCells(scanResult); |
| <a class="jxr_linenumber" name="108" href="#108">108</a> |
| <a class="jxr_linenumber" name="109" href="#109">109</a> <em class="jxr_comment">// 3) traverse the list of row key values isolated before and</em> |
| <a class="jxr_linenumber" name="110" href="#110">110</a> <em class="jxr_comment">// check which ones should be discarded</em> |
| <a class="jxr_linenumber" name="111" href="#111">111</a> Map<String, CellInfo> lastTimestampedCellsInRow = <strong class="jxr_keyword">new</strong> HashMap<>(); |
| <a class="jxr_linenumber" name="112" href="#112">112</a> PeekingIterator<Map.Entry<Cell, Optional<Cell>>> iter |
| <a class="jxr_linenumber" name="113" href="#113">113</a> = Iterators.peekingIterator(cellToSc.entrySet().iterator()); |
| <a class="jxr_linenumber" name="114" href="#114">114</a> <strong class="jxr_keyword">while</strong> (iter.hasNext()) { |
| <a class="jxr_linenumber" name="115" href="#115">115</a> Map.Entry<Cell, Optional<Cell>> entry = iter.next(); |
| <a class="jxr_linenumber" name="116" href="#116">116</a> Cell cell = entry.getKey(); |
| <a class="jxr_linenumber" name="117" href="#117">117</a> Optional<Cell> shadowCellOp = entry.getValue(); |
| <a class="jxr_linenumber" name="118" href="#118">118</a> |
| <a class="jxr_linenumber" name="119" href="#119">119</a> <strong class="jxr_keyword">if</strong> (cell.getTimestamp() > lowWatermark) { |
| <a class="jxr_linenumber" name="120" href="#120">120</a> retain(currentRowWorthValues, cell, shadowCellOp); |
| <a class="jxr_linenumber" name="121" href="#121">121</a> <strong class="jxr_keyword">continue</strong>; |
| <a class="jxr_linenumber" name="122" href="#122">122</a> } |
| <a class="jxr_linenumber" name="123" href="#123">123</a> |
| <a class="jxr_linenumber" name="124" href="#124">124</a> <strong class="jxr_keyword">if</strong> (shouldRetainNonTransactionallyDeletedCell(cell)) { |
| <a class="jxr_linenumber" name="125" href="#125">125</a> retain(currentRowWorthValues, cell, shadowCellOp); |
| <a class="jxr_linenumber" name="126" href="#126">126</a> <strong class="jxr_keyword">continue</strong>; |
| <a class="jxr_linenumber" name="127" href="#127">127</a> } |
| <a class="jxr_linenumber" name="128" href="#128">128</a> |
| <a class="jxr_linenumber" name="129" href="#129">129</a> <em class="jxr_comment">// During a minor compaction the coprocessor may only see a</em> |
| <a class="jxr_linenumber" name="130" href="#130">130</a> <em class="jxr_comment">// subset of store files and may not have the all the versions</em> |
| <a class="jxr_linenumber" name="131" href="#131">131</a> <em class="jxr_comment">// of a cell available for consideration. Therefore, if it</em> |
| <a class="jxr_linenumber" name="132" href="#132">132</a> <em class="jxr_comment">// deletes a cell with a tombstone during a minor compaction,</em> |
| <a class="jxr_linenumber" name="133" href="#133">133</a> <em class="jxr_comment">// an older version of the cell may become visible again. So,</em> |
| <a class="jxr_linenumber" name="134" href="#134">134</a> <em class="jxr_comment">// we have to remove tombstones only in major compactions.</em> |
| <a class="jxr_linenumber" name="135" href="#135">135</a> <strong class="jxr_keyword">if</strong> (isMajorCompaction) { |
| <a class="jxr_linenumber" name="136" href="#136">136</a> <em class="jxr_comment">// Strong assumption that family delete cells arrive first before any other column</em> |
| <a class="jxr_linenumber" name="137" href="#137">137</a> <strong class="jxr_keyword">if</strong> (CellUtils.isTombstone(cell)) { |
| <a class="jxr_linenumber" name="138" href="#138">138</a> <strong class="jxr_keyword">if</strong> (shadowCellOp.isPresent()) { |
| <a class="jxr_linenumber" name="139" href="#139">139</a> skipToNextColumn(cell, iter); |
| <a class="jxr_linenumber" name="140" href="#140">140</a> } <strong class="jxr_keyword">else</strong> { |
| <a class="jxr_linenumber" name="141" href="#141">141</a> Optional<CommitTimestamp> commitTimestamp = queryCommitTimestamp(cell); |
| <a class="jxr_linenumber" name="142" href="#142">142</a> <em class="jxr_comment">// Clean the cell only if it is valid</em> |
| <a class="jxr_linenumber" name="143" href="#143">143</a> <strong class="jxr_keyword">if</strong> (commitTimestamp.isPresent() && commitTimestamp.get().isValid()) { |
| <a class="jxr_linenumber" name="144" href="#144">144</a> skipToNextColumn(cell, iter); |
| <a class="jxr_linenumber" name="145" href="#145">145</a> } |
| <a class="jxr_linenumber" name="146" href="#146">146</a> } |
| <a class="jxr_linenumber" name="147" href="#147">147</a> <strong class="jxr_keyword">continue</strong>; |
| <a class="jxr_linenumber" name="148" href="#148">148</a> } |
| <a class="jxr_linenumber" name="149" href="#149">149</a> } |
| <a class="jxr_linenumber" name="150" href="#150">150</a> |
| <a class="jxr_linenumber" name="151" href="#151">151</a> <strong class="jxr_keyword">if</strong> (shadowCellOp.isPresent()) { |
| <a class="jxr_linenumber" name="152" href="#152">152</a> saveLastTimestampedCell(lastTimestampedCellsInRow, cell, shadowCellOp.get()); |
| <a class="jxr_linenumber" name="153" href="#153">153</a> } <strong class="jxr_keyword">else</strong> { |
| <a class="jxr_linenumber" name="154" href="#154">154</a> Optional<CommitTimestamp> commitTimestamp = queryCommitTimestamp(cell); |
| <a class="jxr_linenumber" name="155" href="#155">155</a> <strong class="jxr_keyword">if</strong> (commitTimestamp.isPresent() && commitTimestamp.get().isValid()) { |
| <a class="jxr_linenumber" name="156" href="#156">156</a> <em class="jxr_comment">// Build the missing shadow cell...</em> |
| <a class="jxr_linenumber" name="157" href="#157">157</a> byte[] shadowCellValue = Bytes.toBytes(commitTimestamp.get().getValue()); |
| <a class="jxr_linenumber" name="158" href="#158">158</a> Cell shadowCell = CellUtils.buildShadowCellFromCell(cell, shadowCellValue); |
| <a class="jxr_linenumber" name="159" href="#159">159</a> saveLastTimestampedCell(lastTimestampedCellsInRow, cell, shadowCell); |
| <a class="jxr_linenumber" name="160" href="#160">160</a> } <strong class="jxr_keyword">else</strong> { |
| <a class="jxr_linenumber" name="161" href="#161">161</a> LOG.trace(<span class="jxr_string">"Discarding cell {}"</span>, cell); |
| <a class="jxr_linenumber" name="162" href="#162">162</a> } |
| <a class="jxr_linenumber" name="163" href="#163">163</a> } |
| <a class="jxr_linenumber" name="164" href="#164">164</a> } |
| <a class="jxr_linenumber" name="165" href="#165">165</a> retainLastTimestampedCellsSaved(currentRowWorthValues, lastTimestampedCellsInRow); |
| <a class="jxr_linenumber" name="166" href="#166">166</a> |
| <a class="jxr_linenumber" name="167" href="#167">167</a> <em class="jxr_comment">// 4) Sort the list</em> |
| <a class="jxr_linenumber" name="168" href="#168">168</a> Collections.sort(currentRowWorthValues, KeyValue.COMPARATOR); |
| <a class="jxr_linenumber" name="169" href="#169">169</a> } |
| <a class="jxr_linenumber" name="170" href="#170">170</a> |
| <a class="jxr_linenumber" name="171" href="#171">171</a> <em class="jxr_comment">// Chomp current row worth values up to the limit</em> |
| <a class="jxr_linenumber" name="172" href="#172">172</a> <strong class="jxr_keyword">if</strong> (currentRowWorthValues.size() <= limit || limit == -1) { |
| <a class="jxr_linenumber" name="173" href="#173">173</a> result.addAll(currentRowWorthValues); |
| <a class="jxr_linenumber" name="174" href="#174">174</a> currentRowWorthValues.clear(); |
| <a class="jxr_linenumber" name="175" href="#175">175</a> } <strong class="jxr_keyword">else</strong> { |
| <a class="jxr_linenumber" name="176" href="#176">176</a> result.addAll(currentRowWorthValues.subList(0, limit)); |
| <a class="jxr_linenumber" name="177" href="#177">177</a> currentRowWorthValues.subList(0, limit).clear(); |
| <a class="jxr_linenumber" name="178" href="#178">178</a> } |
| <a class="jxr_linenumber" name="179" href="#179">179</a> LOG.trace(<span class="jxr_string">"Results to preserve {}"</span>, result); |
| <a class="jxr_linenumber" name="180" href="#180">180</a> |
| <a class="jxr_linenumber" name="181" href="#181">181</a> <strong class="jxr_keyword">return</strong> hasMoreRows; |
| <a class="jxr_linenumber" name="182" href="#182">182</a> } |
| <a class="jxr_linenumber" name="183" href="#183">183</a> |
| <a class="jxr_linenumber" name="184" href="#184">184</a> @Override |
| <a class="jxr_linenumber" name="185" href="#185">185</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> close() <strong class="jxr_keyword">throws</strong> IOException { |
| <a class="jxr_linenumber" name="186" href="#186">186</a> internalScanner.close(); |
| <a class="jxr_linenumber" name="187" href="#187">187</a> } |
| <a class="jxr_linenumber" name="188" href="#188">188</a> |
| <a class="jxr_linenumber" name="189" href="#189">189</a> <em class="jxr_comment">// ----------------------------------------------------------------------------------------------------------------</em> |
| <a class="jxr_linenumber" name="190" href="#190">190</a> <em class="jxr_comment">// Helper methods</em> |
| <a class="jxr_linenumber" name="191" href="#191">191</a> <em class="jxr_comment">// ----------------------------------------------------------------------------------------------------------------</em> |
| <a class="jxr_linenumber" name="192" href="#192">192</a> |
| <a class="jxr_linenumber" name="193" href="#193">193</a> @VisibleForTesting |
| <a class="jxr_linenumber" name="194" href="#194">194</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> shouldRetainNonTransactionallyDeletedCell(Cell cell) { |
| <a class="jxr_linenumber" name="195" href="#195">195</a> <strong class="jxr_keyword">return</strong> (CellUtil.isDelete(cell) || CellUtil.isDeleteFamily(cell)) |
| <a class="jxr_linenumber" name="196" href="#196">196</a> && |
| <a class="jxr_linenumber" name="197" href="#197">197</a> retainNonTransactionallyDeletedCells; |
| <a class="jxr_linenumber" name="198" href="#198">198</a> } |
| <a class="jxr_linenumber" name="199" href="#199">199</a> |
| <a class="jxr_linenumber" name="200" href="#200">200</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> saveLastTimestampedCell(Map<String, CellInfo> lastCells, Cell cell, Cell shadowCell) { |
| <a class="jxr_linenumber" name="201" href="#201">201</a> String cellKey = Bytes.toString(cell.getFamilyArray(), cell.getFamilyOffset(), cell.getFamilyLength()) |
| <a class="jxr_linenumber" name="202" href="#202">202</a> + <span class="jxr_string">":"</span> |
| <a class="jxr_linenumber" name="203" href="#203">203</a> + Bytes.toString(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierLength()); |
| <a class="jxr_linenumber" name="204" href="#204">204</a> LOG.trace(<span class="jxr_string">"Cell Key: {}"</span>, cellKey); |
| <a class="jxr_linenumber" name="205" href="#205">205</a> |
| <a class="jxr_linenumber" name="206" href="#206">206</a> <strong class="jxr_keyword">if</strong> (!lastCells.containsKey(cellKey)) { |
| <a class="jxr_linenumber" name="207" href="#207">207</a> lastCells.put(cellKey, <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/omid/transaction/CellInfo.html">CellInfo</a>(cell, shadowCell)); |
| <a class="jxr_linenumber" name="208" href="#208">208</a> } <strong class="jxr_keyword">else</strong> { |
| <a class="jxr_linenumber" name="209" href="#209">209</a> <strong class="jxr_keyword">if</strong> (lastCells.get(cellKey).getTimestamp() < cell.getTimestamp()) { |
| <a class="jxr_linenumber" name="210" href="#210">210</a> lastCells.put(cellKey, <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/omid/transaction/CellInfo.html">CellInfo</a>(cell, shadowCell)); |
| <a class="jxr_linenumber" name="211" href="#211">211</a> } <strong class="jxr_keyword">else</strong> { |
| <a class="jxr_linenumber" name="212" href="#212">212</a> LOG.trace(<span class="jxr_string">"Forgetting old cell {}"</span>, cell); |
| <a class="jxr_linenumber" name="213" href="#213">213</a> } |
| <a class="jxr_linenumber" name="214" href="#214">214</a> } |
| <a class="jxr_linenumber" name="215" href="#215">215</a> } |
| <a class="jxr_linenumber" name="216" href="#216">216</a> |
| <a class="jxr_linenumber" name="217" href="#217">217</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">long</strong> getLowWatermarkFromCommitTable() <strong class="jxr_keyword">throws</strong> IOException { |
| <a class="jxr_linenumber" name="218" href="#218">218</a> <strong class="jxr_keyword">try</strong> { |
| <a class="jxr_linenumber" name="219" href="#219">219</a> LOG.trace(<span class="jxr_string">"About to read log watermark from commit table"</span>); |
| <a class="jxr_linenumber" name="220" href="#220">220</a> <strong class="jxr_keyword">return</strong> commitTableClient.readLowWatermark().get(); |
| <a class="jxr_linenumber" name="221" href="#221">221</a> } <strong class="jxr_keyword">catch</strong> (InterruptedException ie) { |
| <a class="jxr_linenumber" name="222" href="#222">222</a> Thread.currentThread().interrupt(); |
| <a class="jxr_linenumber" name="223" href="#223">223</a> LOG.warn(<span class="jxr_string">"Interrupted getting low watermark from commit table"</span>, ie); |
| <a class="jxr_linenumber" name="224" href="#224">224</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Interrupted getting low watermark from commit table"</span>); |
| <a class="jxr_linenumber" name="225" href="#225">225</a> } <strong class="jxr_keyword">catch</strong> (ExecutionException ee) { |
| <a class="jxr_linenumber" name="226" href="#226">226</a> LOG.warn(<span class="jxr_string">"Problem getting low watermark from commit table"</span>); |
| <a class="jxr_linenumber" name="227" href="#227">227</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Problem getting low watermark from commit table"</span>, ee.getCause()); |
| <a class="jxr_linenumber" name="228" href="#228">228</a> } |
| <a class="jxr_linenumber" name="229" href="#229">229</a> } |
| <a class="jxr_linenumber" name="230" href="#230">230</a> |
| <a class="jxr_linenumber" name="231" href="#231">231</a> |
| <a class="jxr_linenumber" name="232" href="#232">232</a> <strong class="jxr_keyword">private</strong> Result getShadowCell(byte[] row, byte[] family, byte[] qualifier, <strong class="jxr_keyword">long</strong> timestamp) <strong class="jxr_keyword">throws</strong> IOException { |
| <a class="jxr_linenumber" name="233" href="#233">233</a> Get g = <strong class="jxr_keyword">new</strong> Get(row); |
| <a class="jxr_linenumber" name="234" href="#234">234</a> g.addColumn(family, qualifier); |
| <a class="jxr_linenumber" name="235" href="#235">235</a> g.setTimeStamp(timestamp); |
| <a class="jxr_linenumber" name="236" href="#236">236</a> Result r = hRegion.get(g); |
| <a class="jxr_linenumber" name="237" href="#237">237</a> <strong class="jxr_keyword">return</strong> r; |
| <a class="jxr_linenumber" name="238" href="#238">238</a> } |
| <a class="jxr_linenumber" name="239" href="#239">239</a> |
| <a class="jxr_linenumber" name="240" href="#240">240</a> |
| <a class="jxr_linenumber" name="241" href="#241">241</a> <strong class="jxr_keyword">private</strong> Optional<CommitTimestamp> getCommitTimestampWithRaces(Cell cell) <strong class="jxr_keyword">throws</strong> IOException { |
| <a class="jxr_linenumber" name="242" href="#242">242</a> <strong class="jxr_keyword">try</strong> { |
| <a class="jxr_linenumber" name="243" href="#243">243</a> byte[] family = CellUtil.cloneFamily(cell); |
| <a class="jxr_linenumber" name="244" href="#244">244</a> byte[] qualifier = CellUtils.addShadowCellSuffixPrefix(cell.getQualifierArray(), |
| <a class="jxr_linenumber" name="245" href="#245">245</a> cell.getQualifierOffset(), |
| <a class="jxr_linenumber" name="246" href="#246">246</a> cell.getQualifierLength()); |
| <a class="jxr_linenumber" name="247" href="#247">247</a> <em class="jxr_comment">// 2) Then check the commit table</em> |
| <a class="jxr_linenumber" name="248" href="#248">248</a> Optional<CommitTimestamp> ct = commitTableClient.getCommitTimestamp(cell.getTimestamp()).get(); |
| <a class="jxr_linenumber" name="249" href="#249">249</a> <strong class="jxr_keyword">if</strong> (ct.isPresent()) { |
| <a class="jxr_linenumber" name="250" href="#250">250</a> <strong class="jxr_keyword">if</strong> (ct.get().isValid()) { |
| <a class="jxr_linenumber" name="251" href="#251">251</a> <strong class="jxr_keyword">return</strong> Optional.of(ct.get()); |
| <a class="jxr_linenumber" name="252" href="#252">252</a> } |
| <a class="jxr_linenumber" name="253" href="#253">253</a> <em class="jxr_comment">// If invalid still should check sc because maybe we got falsely invalidated by another compaction or ll client</em> |
| <a class="jxr_linenumber" name="254" href="#254">254</a> } |
| <a class="jxr_linenumber" name="255" href="#255">255</a> |
| <a class="jxr_linenumber" name="256" href="#256">256</a> <em class="jxr_comment">// 3) Read from shadow cell</em> |
| <a class="jxr_linenumber" name="257" href="#257">257</a> Result r = getShadowCell(CellUtil.cloneRow(cell), family, qualifier, cell.getTimestamp()); |
| <a class="jxr_linenumber" name="258" href="#258">258</a> <strong class="jxr_keyword">if</strong> (r.containsColumn(CellUtil.cloneFamily(cell), qualifier)) { |
| <a class="jxr_linenumber" name="259" href="#259">259</a> Optional<CommitTimestamp> retval = Optional.of(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/omid/committable/CommitTable.html">CommitTimestamp</a>(SHADOW_CELL, |
| <a class="jxr_linenumber" name="260" href="#260">260</a> Bytes.toLong(r.getValue(family, qualifier)), <strong class="jxr_keyword">true</strong>)); |
| <a class="jxr_linenumber" name="261" href="#261">261</a> <strong class="jxr_keyword">return</strong> retval; |
| <a class="jxr_linenumber" name="262" href="#262">262</a> } |
| <a class="jxr_linenumber" name="263" href="#263">263</a> |
| <a class="jxr_linenumber" name="264" href="#264">264</a> <em class="jxr_comment">// [OMID-146] - we have to invalidate a transaction if it hasn't reached the commit table</em> |
| <a class="jxr_linenumber" name="265" href="#265">265</a> <em class="jxr_comment">// 4) invalidate the entry</em> |
| <a class="jxr_linenumber" name="266" href="#266">266</a> Boolean invalidated = commitTableClient.tryInvalidateTransaction(cell.getTimestamp()).get(); |
| <a class="jxr_linenumber" name="267" href="#267">267</a> <strong class="jxr_keyword">if</strong> (invalidated) { |
| <a class="jxr_linenumber" name="268" href="#268">268</a> <em class="jxr_comment">// If we are running lowLatency Omid, we could have managed to invalidate a ct entry,</em> |
| <a class="jxr_linenumber" name="269" href="#269">269</a> <em class="jxr_comment">// but the committing client already wrote to shadow cells:</em> |
| <a class="jxr_linenumber" name="270" href="#270">270</a> Result r2 = getShadowCell(CellUtil.cloneRow(cell), family, qualifier, cell.getTimestamp()); |
| <a class="jxr_linenumber" name="271" href="#271">271</a> <strong class="jxr_keyword">if</strong> (r2.containsColumn(CellUtil.cloneFamily(cell), qualifier)) { |
| <a class="jxr_linenumber" name="272" href="#272">272</a> Optional<CommitTimestamp> retval = Optional.of(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/omid/committable/CommitTable.html">CommitTimestamp</a>(SHADOW_CELL, |
| <a class="jxr_linenumber" name="273" href="#273">273</a> Bytes.toLong(r2.getValue(family, qualifier)), <strong class="jxr_keyword">true</strong>)); |
| <a class="jxr_linenumber" name="274" href="#274">274</a> commitTableClient.deleteCommitEntry(cell.getTimestamp()); |
| <a class="jxr_linenumber" name="275" href="#275">275</a> <strong class="jxr_keyword">return</strong> retval; |
| <a class="jxr_linenumber" name="276" href="#276">276</a> } |
| <a class="jxr_linenumber" name="277" href="#277">277</a> <strong class="jxr_keyword">return</strong> Optional.absent(); |
| <a class="jxr_linenumber" name="278" href="#278">278</a> } |
| <a class="jxr_linenumber" name="279" href="#279">279</a> |
| <a class="jxr_linenumber" name="280" href="#280">280</a> <em class="jxr_comment">// 5) We did not manage to invalidate the transactions then check the commit table</em> |
| <a class="jxr_linenumber" name="281" href="#281">281</a> Optional<CommitTimestamp> ct2 = commitTableClient.getCommitTimestamp(cell.getTimestamp()).get(); |
| <a class="jxr_linenumber" name="282" href="#282">282</a> <strong class="jxr_keyword">if</strong> (ct2.isPresent()) { |
| <a class="jxr_linenumber" name="283" href="#283">283</a> <strong class="jxr_keyword">return</strong> Optional.of(ct2.get()); |
| <a class="jxr_linenumber" name="284" href="#284">284</a> } |
| <a class="jxr_linenumber" name="285" href="#285">285</a> |
| <a class="jxr_linenumber" name="286" href="#286">286</a> <em class="jxr_comment">// 6) Read from shadow cell</em> |
| <a class="jxr_linenumber" name="287" href="#287">287</a> Result r2 = getShadowCell(CellUtil.cloneRow(cell), family, qualifier, cell.getTimestamp()); |
| <a class="jxr_linenumber" name="288" href="#288">288</a> <strong class="jxr_keyword">if</strong> (r2.containsColumn(CellUtil.cloneFamily(cell), qualifier)) { |
| <a class="jxr_linenumber" name="289" href="#289">289</a> Optional<CommitTimestamp> retval = Optional.of(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/omid/committable/CommitTable.html">CommitTimestamp</a>(SHADOW_CELL, |
| <a class="jxr_linenumber" name="290" href="#290">290</a> Bytes.toLong(r2.getValue(family, qualifier)), <strong class="jxr_keyword">true</strong>)); |
| <a class="jxr_linenumber" name="291" href="#291">291</a> <strong class="jxr_keyword">return</strong> retval; |
| <a class="jxr_linenumber" name="292" href="#292">292</a> } |
| <a class="jxr_linenumber" name="293" href="#293">293</a> |
| <a class="jxr_linenumber" name="294" href="#294">294</a> } <strong class="jxr_keyword">catch</strong> (InterruptedException e) { |
| <a class="jxr_linenumber" name="295" href="#295">295</a> Thread.currentThread().interrupt(); |
| <a class="jxr_linenumber" name="296" href="#296">296</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Interrupted while getting commit timestamp from commit table"</span>); |
| <a class="jxr_linenumber" name="297" href="#297">297</a> } <strong class="jxr_keyword">catch</strong> (ExecutionException e) { |
| <a class="jxr_linenumber" name="298" href="#298">298</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Error getting commit timestamp from commit table"</span>, e); |
| <a class="jxr_linenumber" name="299" href="#299">299</a> } |
| <a class="jxr_linenumber" name="300" href="#300">300</a> |
| <a class="jxr_linenumber" name="301" href="#301">301</a> <strong class="jxr_keyword">return</strong> Optional.absent(); |
| <a class="jxr_linenumber" name="302" href="#302">302</a> } |
| <a class="jxr_linenumber" name="303" href="#303">303</a> |
| <a class="jxr_linenumber" name="304" href="#304">304</a> <strong class="jxr_keyword">private</strong> Optional<CommitTimestamp> queryCommitTimestamp(Cell cell) <strong class="jxr_keyword">throws</strong> IOException { |
| <a class="jxr_linenumber" name="305" href="#305">305</a> |
| <a class="jxr_linenumber" name="306" href="#306">306</a> <em class="jxr_comment">// 1) First check the cache</em> |
| <a class="jxr_linenumber" name="307" href="#307">307</a> Optional<CommitTimestamp> cachedValue = commitCache.get(cell.getTimestamp()); |
| <a class="jxr_linenumber" name="308" href="#308">308</a> <strong class="jxr_keyword">if</strong> (cachedValue != <strong class="jxr_keyword">null</strong>) { |
| <a class="jxr_linenumber" name="309" href="#309">309</a> <strong class="jxr_keyword">return</strong> cachedValue; |
| <a class="jxr_linenumber" name="310" href="#310">310</a> } |
| <a class="jxr_linenumber" name="311" href="#311">311</a> Optional<CommitTimestamp> value = getCommitTimestampWithRaces(cell); |
| <a class="jxr_linenumber" name="312" href="#312">312</a> commitCache.put(cell.getTimestamp(), value); |
| <a class="jxr_linenumber" name="313" href="#313">313</a> <strong class="jxr_keyword">return</strong> value; |
| <a class="jxr_linenumber" name="314" href="#314">314</a> } |
| <a class="jxr_linenumber" name="315" href="#315">315</a> |
| <a class="jxr_linenumber" name="316" href="#316">316</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> retain(List<Cell> result, Cell cell, Optional<Cell> shadowCell) { |
| <a class="jxr_linenumber" name="317" href="#317">317</a> LOG.trace(<span class="jxr_string">"Retaining cell {}"</span>, cell); |
| <a class="jxr_linenumber" name="318" href="#318">318</a> result.add(cell); |
| <a class="jxr_linenumber" name="319" href="#319">319</a> <strong class="jxr_keyword">if</strong> (shadowCell.isPresent()) { |
| <a class="jxr_linenumber" name="320" href="#320">320</a> LOG.trace(<span class="jxr_string">"...with shadow cell {}"</span>, cell, shadowCell.get()); |
| <a class="jxr_linenumber" name="321" href="#321">321</a> result.add(shadowCell.get()); |
| <a class="jxr_linenumber" name="322" href="#322">322</a> } <strong class="jxr_keyword">else</strong> { |
| <a class="jxr_linenumber" name="323" href="#323">323</a> LOG.trace(<span class="jxr_string">"...without shadow cell! (TS is above Low Watermark)"</span>); |
| <a class="jxr_linenumber" name="324" href="#324">324</a> } |
| <a class="jxr_linenumber" name="325" href="#325">325</a> } |
| <a class="jxr_linenumber" name="326" href="#326">326</a> |
| <a class="jxr_linenumber" name="327" href="#327">327</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> retainLastTimestampedCellsSaved(List<Cell> result, Map<String, CellInfo> lastTimestampedCellsInRow) { |
| <a class="jxr_linenumber" name="328" href="#328">328</a> <strong class="jxr_keyword">for</strong> (CellInfo cellInfo : lastTimestampedCellsInRow.values()) { |
| <a class="jxr_linenumber" name="329" href="#329">329</a> LOG.trace(<span class="jxr_string">"Retaining last cell {} with shadow cell {}"</span>, cellInfo.getCell(), cellInfo.getShadowCell()); |
| <a class="jxr_linenumber" name="330" href="#330">330</a> result.add(cellInfo.getCell()); |
| <a class="jxr_linenumber" name="331" href="#331">331</a> result.add(cellInfo.getShadowCell()); |
| <a class="jxr_linenumber" name="332" href="#332">332</a> } |
| <a class="jxr_linenumber" name="333" href="#333">333</a> } |
| <a class="jxr_linenumber" name="334" href="#334">334</a> |
| <a class="jxr_linenumber" name="335" href="#335">335</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> skipToNextColumn(Cell cell, PeekingIterator<Map.Entry<Cell, Optional<Cell>>> iter) { |
| <a class="jxr_linenumber" name="336" href="#336">336</a> <strong class="jxr_keyword">boolean</strong> isFamilyDelete = CellUtils.isFamilyDeleteCell(cell); |
| <a class="jxr_linenumber" name="337" href="#337">337</a> <strong class="jxr_keyword">while</strong> (iter.hasNext() |
| <a class="jxr_linenumber" name="338" href="#338">338</a> && CellUtil.matchingFamily(iter.peek().getKey(), cell) |
| <a class="jxr_linenumber" name="339" href="#339">339</a> && (CellUtil.matchingQualifier(iter.peek().getKey(), cell) || isFamilyDelete)) { |
| <a class="jxr_linenumber" name="340" href="#340">340</a> iter.next(); |
| <a class="jxr_linenumber" name="341" href="#341">341</a> } |
| <a class="jxr_linenumber" name="342" href="#342">342</a> } |
| <a class="jxr_linenumber" name="343" href="#343">343</a> |
| <a class="jxr_linenumber" name="344" href="#344">344</a> } |
| </pre> |
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