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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.omid.tso.client;
<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.util.concurrent.SettableFuture;
<a class="jxr_linenumber" name="21" href="#21">21</a>
<a class="jxr_linenumber" name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> org.apache.omid.committable.CommitTable;
<a class="jxr_linenumber" name="23" href="#23">23</a>
<a class="jxr_linenumber" name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> java.io.IOException;
<a class="jxr_linenumber" name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> java.util.HashSet;
<a class="jxr_linenumber" name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> java.util.Set;
<a class="jxr_linenumber" name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> java.util.Map;
<a class="jxr_linenumber" name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> java.util.HashMap;
<a class="jxr_linenumber" name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.atomic.AtomicLong;
<a class="jxr_linenumber" name="30" href="#30">30</a>
<a class="jxr_linenumber" name="31" href="#31">31</a> <em class="jxr_comment">// TODO Would be nice to compile all util classes for testing to a separate package that clients could import for tests</em>
<a class="jxr_linenumber" name="32" href="#32">32</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/omid/tso/client/MockTSOClient.html">MockTSOClient</a> <strong class="jxr_keyword">implements</strong> <a href="../../../../../org/apache/omid/tso/client/TSOProtocol.html">TSOProtocol</a> {
<a class="jxr_linenumber" name="33" href="#33">33</a>
<a class="jxr_linenumber" name="34" href="#34">34</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> CONFLICT_MAP_SIZE = 1_000_000;
<a class="jxr_linenumber" name="35" href="#35">35</a>
<a class="jxr_linenumber" name="36" href="#36">36</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> AtomicLong timestampGenerator = <strong class="jxr_keyword">new</strong> AtomicLong();
<a class="jxr_linenumber" name="37" href="#37">37</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong>[] conflictMap = <strong class="jxr_keyword">new</strong> <strong class="jxr_keyword">long</strong>[CONFLICT_MAP_SIZE];
<a class="jxr_linenumber" name="38" href="#38">38</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Map&lt;Long, Long&gt; fenceMap = <strong class="jxr_keyword">new</strong> HashMap&lt;Long, Long&gt;();
<a class="jxr_linenumber" name="39" href="#39">39</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> AtomicLong lwm = <strong class="jxr_keyword">new</strong> AtomicLong();
<a class="jxr_linenumber" name="40" href="#40">40</a>
<a class="jxr_linenumber" name="41" href="#41">41</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> CommitTable.Writer commitTable;
<a class="jxr_linenumber" name="42" href="#42">42</a>
<a class="jxr_linenumber" name="43" href="#43">43</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/omid/tso/client/MockTSOClient.html">MockTSOClient</a>(CommitTable.Writer commitTable) {
<a class="jxr_linenumber" name="44" href="#44">44</a> <strong class="jxr_keyword">this</strong>.commitTable = commitTable;
<a class="jxr_linenumber" name="45" href="#45">45</a> }
<a class="jxr_linenumber" name="46" href="#46">46</a>
<a class="jxr_linenumber" name="47" href="#47">47</a> @Override
<a class="jxr_linenumber" name="48" href="#48">48</a> <strong class="jxr_keyword">public</strong> TSOFuture&lt;Long&gt; getNewStartTimestamp() {
<a class="jxr_linenumber" name="49" href="#49">49</a> <strong class="jxr_keyword">synchronized</strong> (conflictMap) {
<a class="jxr_linenumber" name="50" href="#50">50</a> SettableFuture&lt;Long&gt; f = SettableFuture.create();
<a class="jxr_linenumber" name="51" href="#51">51</a> f.set(timestampGenerator.incrementAndGet());
<a class="jxr_linenumber" name="52" href="#52">52</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> ForwardingTSOFuture&lt;&gt;(f);
<a class="jxr_linenumber" name="53" href="#53">53</a> }
<a class="jxr_linenumber" name="54" href="#54">54</a> }
<a class="jxr_linenumber" name="55" href="#55">55</a>
<a class="jxr_linenumber" name="56" href="#56">56</a> @Override
<a class="jxr_linenumber" name="57" href="#57">57</a> <strong class="jxr_keyword">public</strong> TSOFuture&lt;Long&gt; getFence(<strong class="jxr_keyword">long</strong> tableId) {
<a class="jxr_linenumber" name="58" href="#58">58</a> <strong class="jxr_keyword">synchronized</strong> (conflictMap) {
<a class="jxr_linenumber" name="59" href="#59">59</a> SettableFuture&lt;Long&gt; f = SettableFuture.create();
<a class="jxr_linenumber" name="60" href="#60">60</a> <strong class="jxr_keyword">long</strong> fenceTimestamp = timestampGenerator.incrementAndGet();
<a class="jxr_linenumber" name="61" href="#61">61</a> f.set(fenceTimestamp);
<a class="jxr_linenumber" name="62" href="#62">62</a> fenceMap.put(tableId, fenceTimestamp);
<a class="jxr_linenumber" name="63" href="#63">63</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="64" href="#64">64</a> <em class="jxr_comment">// Persist the fence by using the fence identifier as both the start and commit timestamp.</em>
<a class="jxr_linenumber" name="65" href="#65">65</a> commitTable.addCommittedTransaction(fenceTimestamp, fenceTimestamp);
<a class="jxr_linenumber" name="66" href="#66">66</a> commitTable.flush();
<a class="jxr_linenumber" name="67" href="#67">67</a> } <strong class="jxr_keyword">catch</strong> (IOException ioe) {
<a class="jxr_linenumber" name="68" href="#68">68</a> f.setException(ioe);
<a class="jxr_linenumber" name="69" href="#69">69</a> }
<a class="jxr_linenumber" name="70" href="#70">70</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> ForwardingTSOFuture&lt;&gt;(f);
<a class="jxr_linenumber" name="71" href="#71">71</a> }
<a class="jxr_linenumber" name="72" href="#72">72</a> }
<a class="jxr_linenumber" name="73" href="#73">73</a>
<a class="jxr_linenumber" name="74" href="#74">74</a> <em class="jxr_comment">// Checks whether transaction transactionId started before a fence creation of a table transactionId modified.</em>
<a class="jxr_linenumber" name="75" href="#75">75</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> hasConflictsWithFences(<strong class="jxr_keyword">long</strong> transactionId, Set&lt;? <strong class="jxr_keyword">extends</strong> CellId&gt; cells) {
<a class="jxr_linenumber" name="76" href="#76">76</a> Set&lt;Long&gt; tableIDs = <strong class="jxr_keyword">new</strong> HashSet&lt;Long&gt;();
<a class="jxr_linenumber" name="77" href="#77">77</a> <strong class="jxr_keyword">for</strong> (CellId c : cells) {
<a class="jxr_linenumber" name="78" href="#78">78</a> tableIDs.add(c.getTableId());
<a class="jxr_linenumber" name="79" href="#79">79</a> }
<a class="jxr_linenumber" name="80" href="#80">80</a>
<a class="jxr_linenumber" name="81" href="#81">81</a> <strong class="jxr_keyword">if</strong> (! fenceMap.isEmpty()) {
<a class="jxr_linenumber" name="82" href="#82">82</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">long</strong> tableId : tableIDs) {
<a class="jxr_linenumber" name="83" href="#83">83</a> Long fence = fenceMap.get(tableId);
<a class="jxr_linenumber" name="84" href="#84">84</a> <strong class="jxr_keyword">if</strong> (fence != <strong class="jxr_keyword">null</strong> &amp;&amp; transactionId &lt; fence) {
<a class="jxr_linenumber" name="85" href="#85">85</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="86" href="#86">86</a> }
<a class="jxr_linenumber" name="87" href="#87">87</a> <strong class="jxr_keyword">if</strong> (fence != <strong class="jxr_keyword">null</strong> &amp;&amp; fence &lt; lwm.get()) { <em class="jxr_comment">// GC</em>
<a class="jxr_linenumber" name="88" href="#88">88</a> fenceMap.remove(tableId);
<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> }
<a class="jxr_linenumber" name="92" href="#92">92</a>
<a class="jxr_linenumber" name="93" href="#93">93</a> <strong class="jxr_keyword">return</strong> false;
<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> <em class="jxr_comment">// Checks whether transactionId has a write-write conflict with a transaction committed after transactionId.</em>
<a class="jxr_linenumber" name="97" href="#97">97</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> hasConflictsWithCommittedTransactions(<strong class="jxr_keyword">long</strong> transactionId, Set&lt;? <strong class="jxr_keyword">extends</strong> CellId&gt; cells) {
<a class="jxr_linenumber" name="98" href="#98">98</a> <strong class="jxr_keyword">for</strong> (CellId c : cells) {
<a class="jxr_linenumber" name="99" href="#99">99</a> <strong class="jxr_keyword">int</strong> index = Math.abs((<strong class="jxr_keyword">int</strong>) (c.getCellId() % CONFLICT_MAP_SIZE));
<a class="jxr_linenumber" name="100" href="#100">100</a> <strong class="jxr_keyword">if</strong> (conflictMap[index] &gt;= transactionId) {
<a class="jxr_linenumber" name="101" href="#101">101</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="102" href="#102">102</a> }
<a class="jxr_linenumber" name="103" href="#103">103</a> }
<a class="jxr_linenumber" name="104" href="#104">104</a>
<a class="jxr_linenumber" name="105" href="#105">105</a> <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="106" href="#106">106</a> }
<a class="jxr_linenumber" name="107" href="#107">107</a>
<a class="jxr_linenumber" name="108" href="#108">108</a> @Override
<a class="jxr_linenumber" name="109" href="#109">109</a> <strong class="jxr_keyword">public</strong> TSOFuture&lt;Long&gt; commit(<strong class="jxr_keyword">long</strong> transactionId, Set&lt;? <strong class="jxr_keyword">extends</strong> CellId&gt; cells, Set&lt;? <strong class="jxr_keyword">extends</strong> CellId&gt; conflictFreeWriteSet) {
<a class="jxr_linenumber" name="110" href="#110">110</a> <strong class="jxr_keyword">return</strong> commit(transactionId, cells);
<a class="jxr_linenumber" name="111" href="#111">111</a> }
<a class="jxr_linenumber" name="112" href="#112">112</a>
<a class="jxr_linenumber" name="113" href="#113">113</a> @Override
<a class="jxr_linenumber" name="114" href="#114">114</a> <strong class="jxr_keyword">public</strong> TSOFuture&lt;Long&gt; commit(<strong class="jxr_keyword">long</strong> transactionId, Set&lt;? <strong class="jxr_keyword">extends</strong> CellId&gt; cells) {
<a class="jxr_linenumber" name="115" href="#115">115</a> <strong class="jxr_keyword">synchronized</strong> (conflictMap) {
<a class="jxr_linenumber" name="116" href="#116">116</a> SettableFuture&lt;Long&gt; f = SettableFuture.create();
<a class="jxr_linenumber" name="117" href="#117">117</a> <strong class="jxr_keyword">if</strong> (transactionId &lt; lwm.get()) {
<a class="jxr_linenumber" name="118" href="#118">118</a> f.setException(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/omid/tso/client/AbortException.html">AbortException</a>());
<a class="jxr_linenumber" name="119" href="#119">119</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> ForwardingTSOFuture&lt;&gt;(f);
<a class="jxr_linenumber" name="120" href="#120">120</a> }
<a class="jxr_linenumber" name="121" href="#121">121</a>
<a class="jxr_linenumber" name="122" href="#122">122</a> <strong class="jxr_keyword">if</strong> (!hasConflictsWithFences(transactionId, cells) &amp;&amp;
<a class="jxr_linenumber" name="123" href="#123">123</a> !hasConflictsWithCommittedTransactions(transactionId, cells)) {
<a class="jxr_linenumber" name="124" href="#124">124</a>
<a class="jxr_linenumber" name="125" href="#125">125</a> <strong class="jxr_keyword">long</strong> commitTimestamp = timestampGenerator.incrementAndGet();
<a class="jxr_linenumber" name="126" href="#126">126</a> <strong class="jxr_keyword">for</strong> (CellId c : cells) {
<a class="jxr_linenumber" name="127" href="#127">127</a> <strong class="jxr_keyword">int</strong> index = Math.abs((<strong class="jxr_keyword">int</strong>) (c.getCellId() % CONFLICT_MAP_SIZE));
<a class="jxr_linenumber" name="128" href="#128">128</a> <strong class="jxr_keyword">long</strong> oldVal = conflictMap[index];
<a class="jxr_linenumber" name="129" href="#129">129</a> conflictMap[index] = commitTimestamp;
<a class="jxr_linenumber" name="130" href="#130">130</a> <strong class="jxr_keyword">long</strong> curLwm = lwm.get();
<a class="jxr_linenumber" name="131" href="#131">131</a> <strong class="jxr_keyword">while</strong> (oldVal &gt; curLwm) {
<a class="jxr_linenumber" name="132" href="#132">132</a> <strong class="jxr_keyword">if</strong> (lwm.compareAndSet(curLwm, oldVal)) {
<a class="jxr_linenumber" name="133" href="#133">133</a> <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="134" href="#134">134</a> }
<a class="jxr_linenumber" name="135" href="#135">135</a> curLwm = lwm.get();
<a class="jxr_linenumber" name="136" href="#136">136</a> }
<a class="jxr_linenumber" name="137" href="#137">137</a> }
<a class="jxr_linenumber" name="138" href="#138">138</a>
<a class="jxr_linenumber" name="139" href="#139">139</a> f.set(commitTimestamp);
<a class="jxr_linenumber" name="140" href="#140">140</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="141" href="#141">141</a> commitTable.addCommittedTransaction(transactionId, commitTimestamp);
<a class="jxr_linenumber" name="142" href="#142">142</a> commitTable.updateLowWatermark(lwm.get());
<a class="jxr_linenumber" name="143" href="#143">143</a> commitTable.flush();
<a class="jxr_linenumber" name="144" href="#144">144</a> } <strong class="jxr_keyword">catch</strong> (IOException ioe) {
<a class="jxr_linenumber" name="145" href="#145">145</a> f.setException(ioe);
<a class="jxr_linenumber" name="146" href="#146">146</a> }
<a class="jxr_linenumber" name="147" href="#147">147</a> } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="148" href="#148">148</a> f.setException(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/omid/tso/client/AbortException.html">AbortException</a>());
<a class="jxr_linenumber" name="149" href="#149">149</a> }
<a class="jxr_linenumber" name="150" href="#150">150</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> ForwardingTSOFuture&lt;&gt;(f);
<a class="jxr_linenumber" name="151" href="#151">151</a> }
<a class="jxr_linenumber" name="152" href="#152">152</a> }
<a class="jxr_linenumber" name="153" href="#153">153</a>
<a class="jxr_linenumber" name="154" href="#154">154</a> @Override
<a class="jxr_linenumber" name="155" href="#155">155</a> <strong class="jxr_keyword">public</strong> TSOFuture&lt;Void&gt; close() {
<a class="jxr_linenumber" name="156" href="#156">156</a> SettableFuture&lt;Void&gt; f = SettableFuture.create();
<a class="jxr_linenumber" name="157" href="#157">157</a> f.set(<strong class="jxr_keyword">null</strong>);
<a class="jxr_linenumber" name="158" href="#158">158</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> ForwardingTSOFuture&lt;&gt;(f);
<a class="jxr_linenumber" name="159" href="#159">159</a> }
<a class="jxr_linenumber" name="160" href="#160">160</a>
<a class="jxr_linenumber" name="161" href="#161">161</a> @Override
<a class="jxr_linenumber" name="162" href="#162">162</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isLowLatency() {
<a class="jxr_linenumber" name="163" href="#163">163</a> <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="164" href="#164">164</a> }
<a class="jxr_linenumber" name="165" href="#165">165</a>
<a class="jxr_linenumber" name="166" href="#166">166</a> @Override
<a class="jxr_linenumber" name="167" href="#167">167</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> setConflictDetectionLevel(OmidClientConfiguration.ConflictDetectionLevel conflictDetectionLevel) {
<a class="jxr_linenumber" name="168" href="#168">168</a>
<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> @Override
<a class="jxr_linenumber" name="172" href="#172">172</a> <strong class="jxr_keyword">public</strong> OmidClientConfiguration.ConflictDetectionLevel getConflictDetectionLevel() {
<a class="jxr_linenumber" name="173" href="#173">173</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="174" href="#174">174</a> }
<a class="jxr_linenumber" name="175" href="#175">175</a>
<a class="jxr_linenumber" name="176" href="#176">176</a> @Override
<a class="jxr_linenumber" name="177" href="#177">177</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">long</strong> getEpoch() {
<a class="jxr_linenumber" name="178" href="#178">178</a> <strong class="jxr_keyword">return</strong> 0;
<a class="jxr_linenumber" name="179" href="#179">179</a> }
<a class="jxr_linenumber" name="180" href="#180">180</a> }
</pre>
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