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| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.hadoop.hbase.util</a></div> |
| <h1 title="Class LoadTestKVGenerator" class="title">Class LoadTestKVGenerator</h1> |
| </div> |
| <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a> |
| <div class="inheritance">org.apache.hadoop.hbase.util.LoadTestKVGenerator</div> |
| </div> |
| <section class="class-description" id="class-description"> |
| <hr> |
| <div class="type-signature"><span class="annotations">@Private |
| </span><span class="modifiers">public class </span><span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line-31">LoadTestKVGenerator</a></span> |
| <span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></span></div> |
| <div class="block">A generator of random keys and values for load testing. Keys are generated by converting numeric |
| indexes to strings and prefixing them with an MD5 hash. Values are generated by selecting value |
| size in the configured range and generating a pseudo-random sequence of bytes seeded by key, |
| column qualifier, and value size.</div> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- =========== FIELD SUMMARY =========== --> |
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| <section class="field-summary" id="field-summary"> |
| <h2>Field Summary</h2> |
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| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Field</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color"><code>private static final org.slf4j.Logger</code></div> |
| <div class="col-second even-row-color"><code><a href="#LOG" class="member-name-link">LOG</a></code></div> |
| <div class="col-last even-row-color"> </div> |
| <div class="col-first odd-row-color"><code>private static int</code></div> |
| <div class="col-second odd-row-color"><code><a href="#logLimit" class="member-name-link">logLimit</a></code></div> |
| <div class="col-last odd-row-color"> </div> |
| <div class="col-first even-row-color"><code>private final int</code></div> |
| <div class="col-second even-row-color"><code><a href="#maxValueSize" class="member-name-link">maxValueSize</a></code></div> |
| <div class="col-last even-row-color"> </div> |
| <div class="col-first odd-row-color"><code>private final int</code></div> |
| <div class="col-second odd-row-color"><code><a href="#minValueSize" class="member-name-link">minValueSize</a></code></div> |
| <div class="col-last odd-row-color"> </div> |
| <div class="col-first even-row-color"><code>private <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Random.html" title="class or interface in java.util" class="external-link">Random</a></code></div> |
| <div class="col-second even-row-color"><code><a href="#randomForValueSize" class="member-name-link">randomForValueSize</a></code></div> |
| <div class="col-last even-row-color"> |
| <div class="block">A random number generator for determining value size</div> |
| </div> |
| </div> |
| </section> |
| </li> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <li> |
| <section class="constructor-summary" id="constructor-summary"> |
| <h2>Constructor Summary</h2> |
| <div class="caption"><span>Constructors</span></div> |
| <div class="summary-table two-column-summary"> |
| <div class="table-header col-first">Constructor</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E(int,int)" class="member-name-link">LoadTestKVGenerator</a><wbr>(int minValueSize, |
| int maxValueSize)</code></div> |
| <div class="col-last even-row-color"> </div> |
| </div> |
| </section> |
| </li> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <li> |
| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
| <div id="method-summary-table"> |
| <div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab1" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab1', 3)" class="table-tab">Static Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div> |
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| <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Method</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>byte[]</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#generateRandomSizeValue(byte%5B%5D...)" class="member-name-link">generateRandomSizeValue</a><wbr>(byte[]... seedStrings)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Generates a value for the given key index and column qualifier.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>private static byte[]</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#getValueForRowColumn(int,byte%5B%5D...)" class="member-name-link">getValueForRowColumn</a><wbr>(int dataSize, |
| byte[]... seedStrings)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> |
| <div class="block">Generates random bytes of the given size for the given row and column qualifier.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#md5PrefixedKey(long)" class="member-name-link">md5PrefixedKey</a><wbr>(long key)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> |
| <div class="block">Converts the given key to string, and prefixes it with the MD5 hash of the index's string |
| representation.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static boolean</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#verify(byte%5B%5D,byte%5B%5D...)" class="member-name-link">verify</a><wbr>(byte[] value, |
| byte[]... seedStrings)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> |
| <div class="block">Verifies that the given byte array is the same as what would be generated for the given seed |
| strings (row/cf/column/...).</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3> |
| <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <li> |
| <section class="field-details" id="field-detail"> |
| <h2>Field Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="LOG"> |
| <h3>LOG</h3> |
| <div class="member-signature"><span class="modifiers">private static final</span> <span class="return-type">org.slf4j.Logger</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line-34">LOG</a></span></div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="logLimit"> |
| <h3>logLimit</h3> |
| <div class="member-signature"><span class="modifiers">private static</span> <span class="return-type">int</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line-35">logLimit</a></span></div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="randomForValueSize"> |
| <h3>randomForValueSize</h3> |
| <div class="member-signature"><span class="modifiers">private</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Random.html" title="class or interface in java.util" class="external-link">Random</a></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line-38">randomForValueSize</a></span></div> |
| <div class="block">A random number generator for determining value size</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="minValueSize"> |
| <h3>minValueSize</h3> |
| <div class="member-signature"><span class="modifiers">private final</span> <span class="return-type">int</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line-40">minValueSize</a></span></div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="maxValueSize"> |
| <h3>maxValueSize</h3> |
| <div class="member-signature"><span class="modifiers">private final</span> <span class="return-type">int</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line-41">maxValueSize</a></span></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <li> |
| <section class="constructor-details" id="constructor-detail"> |
| <h2>Constructor Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="<init>(int,int)"> |
| <h3>LoadTestKVGenerator</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line-43">LoadTestKVGenerator</a></span><wbr><span class="parameters">(int minValueSize, |
| int maxValueSize)</span></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="verify(byte[],byte[]...)"> |
| <h3>verify</h3> |
| <div class="member-signature"><span class="modifiers">public static</span> <span class="return-type">boolean</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line-58">verify</a></span><wbr><span class="parameters">(byte[] value, |
| byte[]... seedStrings)</span></div> |
| <div class="block">Verifies that the given byte array is the same as what would be generated for the given seed |
| strings (row/cf/column/...). We are assuming that the value size is correct, and only verify |
| the actual bytes. However, if the min/max value sizes are set sufficiently high, an accidental |
| match should be extremely improbable.</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="md5PrefixedKey(long)"> |
| <h3>md5PrefixedKey</h3> |
| <div class="member-signature"><span class="modifiers">public static</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line-73">md5PrefixedKey</a></span><wbr><span class="parameters">(long key)</span></div> |
| <div class="block">Converts the given key to string, and prefixes it with the MD5 hash of the index's string |
| representation.</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="generateRandomSizeValue(byte[]...)"> |
| <h3>generateRandomSizeValue</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">byte[]</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line-89">generateRandomSizeValue</a></span><wbr><span class="parameters">(byte[]... seedStrings)</span></div> |
| <div class="block">Generates a value for the given key index and column qualifier. Size is selected randomly in |
| the configured range. The generated value depends only on the combination of the strings passed |
| (key/cf/column/...) and the selected value size. This allows to verify the actual value bytes |
| when reading, as done in {#verify(byte[], byte[]...)} This method is as thread-safe as Random |
| class. It appears that the worst bug ever found with the latter is that multiple threads will |
| get some duplicate values, which we don't care about.</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getValueForRowColumn(int,byte[]...)"> |
| <h3>getValueForRowColumn</h3> |
| <div class="member-signature"><span class="modifiers">private static</span> <span class="return-type">byte[]</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/LoadTestKVGenerator.html#line-101">getValueForRowColumn</a></span><wbr><span class="parameters">(int dataSize, |
| byte[]... seedStrings)</span></div> |
| <div class="block">Generates random bytes of the given size for the given row and column qualifier. The random |
| seed is fully determined by these parameters.</div> |
| </section> |
| </li> |
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