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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 RegionSplitCalculator" class="title">Class RegionSplitCalculator<R extends <a href="KeyRange.html" title="interface in org.apache.hadoop.hbase.util">KeyRange</a>></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.RegionSplitCalculator<R></div> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>Type Parameters:</dt> |
| <dd><code>R</code> - </dd> |
| </dl> |
| <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/RegionSplitCalculator.html#line-46">RegionSplitCalculator</a><R extends <a href="KeyRange.html" title="interface in org.apache.hadoop.hbase.util">KeyRange</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">This is a generic region split calculator. It requires Ranges that provide start, end, and a |
| comparator. It works in two phases -- the first adds ranges and rejects backwards ranges. Then |
| one calls calcRegions to generate the multimap that has a start split key as a key and possibly |
| multiple Ranges as members. To traverse, one normally would get the split set, and iterate |
| through the calcRegions. Normal regions would have only one entry, holes would have zero, and any |
| overlaps would have multiple entries. The interface is a bit cumbersome currently but is exposed |
| this way so that clients can choose how to iterate through the region splits.</div> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- =========== FIELD SUMMARY =========== --> |
| <li> |
| <section class="field-summary" id="field-summary"> |
| <h2>Field Summary</h2> |
| <div class="caption"><span>Fields</span></div> |
| <div class="summary-table three-column-summary"> |
| <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>static final <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Comparator.html" title="class or interface in java.util" class="external-link">Comparator</a><byte[]></code></div> |
| <div class="col-second even-row-color"><code><a href="#BYTES_COMPARATOR" class="member-name-link">BYTES_COMPARATOR</a></code></div> |
| <div class="col-last even-row-color"> </div> |
| <div class="col-first odd-row-color"><code>private static final byte[]</code></div> |
| <div class="col-second odd-row-color"><code><a href="#ENDKEY" class="member-name-link">ENDKEY</a></code></div> |
| <div class="col-last odd-row-color"> |
| <div class="block">SPECIAL CASE</div> |
| </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 final <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Comparator.html" title="class or interface in java.util" class="external-link">Comparator</a><<a href="RegionSplitCalculator.html" title="type parameter in RegionSplitCalculator">R</a>></code></div> |
| <div class="col-second odd-row-color"><code><a href="#rangeCmp" class="member-name-link">rangeCmp</a></code></div> |
| <div class="col-last odd-row-color"> </div> |
| <div class="col-first even-row-color"><code>private final <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/TreeSet.html" title="class or interface in java.util" class="external-link">TreeSet</a><byte[]></code></div> |
| <div class="col-second even-row-color"><code><a href="#splits" class="member-name-link">splits</a></code></div> |
| <div class="col-last even-row-color"> |
| <div class="block">This contains a sorted set of all the possible split points Invariant: once populated this has |
| 0 entries if empty or at most n+1 values where n == number of added ranges.</div> |
| </div> |
| <div class="col-first odd-row-color"><code>private final org.apache.hbase.thirdparty.com.google.common.collect.Multimap<byte[],<wbr><a href="RegionSplitCalculator.html" title="type parameter in RegionSplitCalculator">R</a>></code></div> |
| <div class="col-second odd-row-color"><code><a href="#starts" class="member-name-link">starts</a></code></div> |
| <div class="col-last odd-row-color"> |
| <div class="block">This is a map from start key to regions with the same start key.</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(java.util.Comparator)" class="member-name-link">RegionSplitCalculator</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Comparator.html" title="class or interface in java.util" class="external-link">Comparator</a><<a href="RegionSplitCalculator.html" title="type parameter in RegionSplitCalculator">R</a>> cmp)</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> |
| <div id="method-summary-table.tabpanel" role="tabpanel"> |
| <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>boolean</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#add(R)" class="member-name-link">add</a><wbr>(<a href="RegionSplitCalculator.html" title="type parameter in RegionSplitCalculator">R</a> range)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Adds an edge to the split calculator</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>org.apache.hbase.thirdparty.com.google.common.collect.Multimap<byte[],<wbr><a href="RegionSplitCalculator.html" title="type parameter in RegionSplitCalculator">R</a>></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#calcCoverage()" class="member-name-link">calcCoverage</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Generates a coverage multimap from split key to Regions that start with the split key.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static <R extends <a href="KeyRange.html" title="interface in org.apache.hadoop.hbase.util">KeyRange</a>><br><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><R></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#findBigRanges(java.util.Collection,int)" class="member-name-link">findBigRanges</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Collection.html" title="class or interface in java.util" class="external-link">Collection</a><R> bigOverlap, |
| int count)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> |
| <div class="block">Find specified number of top ranges in a big overlap group.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/TreeSet.html" title="class or interface in java.util" class="external-link">TreeSet</a><byte[]></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getSplits()" class="member-name-link">getSplits</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>org.apache.hbase.thirdparty.com.google.common.collect.Multimap<byte[],<wbr><a href="RegionSplitCalculator.html" title="type parameter in RegionSplitCalculator">R</a>></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getStarts()" class="member-name-link">getStarts</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>private static <R extends <a href="KeyRange.html" title="interface in org.apache.hadoop.hbase.util">KeyRange</a>><br>byte[]</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#specialEndKey(R)" class="member-name-link">specialEndKey</a><wbr>(R range)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> |
| <div class="block">SPECIAL CASE wrapper for empty end key</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/RegionSplitCalculator.html#line-48">LOG</a></span></div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="rangeCmp"> |
| <h3>rangeCmp</h3> |
| <div class="member-signature"><span class="modifiers">private final</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Comparator.html" title="class or interface in java.util" class="external-link">Comparator</a><<a href="RegionSplitCalculator.html" title="type parameter in RegionSplitCalculator">R</a> extends <a href="KeyRange.html" title="interface in org.apache.hadoop.hbase.util">KeyRange</a>></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/RegionSplitCalculator.html#line-50">rangeCmp</a></span></div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="splits"> |
| <h3>splits</h3> |
| <div class="member-signature"><span class="modifiers">private final</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/TreeSet.html" title="class or interface in java.util" class="external-link">TreeSet</a><byte[]></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/RegionSplitCalculator.html#line-55">splits</a></span></div> |
| <div class="block">This contains a sorted set of all the possible split points Invariant: once populated this has |
| 0 entries if empty or at most n+1 values where n == number of added ranges.</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="starts"> |
| <h3>starts</h3> |
| <div class="member-signature"><span class="modifiers">private final</span> <span class="return-type">org.apache.hbase.thirdparty.com.google.common.collect.Multimap<byte[],<wbr><a href="RegionSplitCalculator.html" title="type parameter in RegionSplitCalculator">R</a> extends <a href="KeyRange.html" title="interface in org.apache.hadoop.hbase.util">KeyRange</a>></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/RegionSplitCalculator.html#line-61">starts</a></span></div> |
| <div class="block">This is a map from start key to regions with the same start key. Invariant: This always have n |
| values in total</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="ENDKEY"> |
| <h3>ENDKEY</h3> |
| <div class="member-signature"><span class="modifiers">private static final</span> <span class="return-type">byte[]</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/RegionSplitCalculator.html#line-66">ENDKEY</a></span></div> |
| <div class="block">SPECIAL CASE</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="BYTES_COMPARATOR"> |
| <h3>BYTES_COMPARATOR</h3> |
| <div class="member-signature"><span class="modifiers">public static final</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Comparator.html" title="class or interface in java.util" class="external-link">Comparator</a><byte[]></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/RegionSplitCalculator.html#line-72">BYTES_COMPARATOR</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>(java.util.Comparator)"> |
| <h3>RegionSplitCalculator</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/RegionSplitCalculator.html#line-68">RegionSplitCalculator</a></span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Comparator.html" title="class or interface in java.util" class="external-link">Comparator</a><<a href="RegionSplitCalculator.html" title="type parameter in RegionSplitCalculator">R</a>> cmp)</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="specialEndKey(R)"> |
| <h3 id="specialEndKey(org.apache.hadoop.hbase.util.KeyRange)">specialEndKey</h3> |
| <div class="member-signature"><span class="modifiers">private static</span> <span class="type-parameters"><R extends <a href="KeyRange.html" title="interface in org.apache.hadoop.hbase.util">KeyRange</a>></span> <span class="return-type">byte[]</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/RegionSplitCalculator.html#line-86">specialEndKey</a></span><wbr><span class="parameters">(R range)</span></div> |
| <div class="block">SPECIAL CASE wrapper for empty end key</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>ENDKEY if end key is empty, else normal endkey.</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="add(R)"> |
| <h3 id="add(org.apache.hadoop.hbase.util.KeyRange)">add</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">boolean</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/RegionSplitCalculator.html#line-98">add</a></span><wbr><span class="parameters">(<a href="RegionSplitCalculator.html" title="type parameter in RegionSplitCalculator">R</a> range)</span></div> |
| <div class="block">Adds an edge to the split calculator</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>true if is included, false if backwards/invalid</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="calcCoverage()"> |
| <h3>calcCoverage</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">org.apache.hbase.thirdparty.com.google.common.collect.Multimap<byte[],<wbr><a href="RegionSplitCalculator.html" title="type parameter in RegionSplitCalculator">R</a>></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/RegionSplitCalculator.html#line-120">calcCoverage</a></span>()</div> |
| <div class="block">Generates a coverage multimap from split key to Regions that start with the split key.</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>coverage multimap</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getSplits()"> |
| <h3>getSplits</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/TreeSet.html" title="class or interface in java.util" class="external-link">TreeSet</a><byte[]></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/RegionSplitCalculator.html#line-139">getSplits</a></span>()</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getStarts()"> |
| <h3>getStarts</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">org.apache.hbase.thirdparty.com.google.common.collect.Multimap<byte[],<wbr><a href="RegionSplitCalculator.html" title="type parameter in RegionSplitCalculator">R</a>></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/RegionSplitCalculator.html#line-143">getStarts</a></span>()</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="findBigRanges(java.util.Collection,int)"> |
| <h3>findBigRanges</h3> |
| <div class="member-signature"><span class="modifiers">public static</span> <span class="type-parameters"><R extends <a href="KeyRange.html" title="interface in org.apache.hadoop.hbase.util">KeyRange</a>></span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><R></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/util/RegionSplitCalculator.html#line-156">findBigRanges</a></span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Collection.html" title="class or interface in java.util" class="external-link">Collection</a><R> bigOverlap, |
| int count)</span></div> |
| <div class="block">Find specified number of top ranges in a big overlap group. It could return less if there are |
| not that many top ranges. Once these top ranges are excluded, the big overlap group will be |
| broken into ranges with no overlapping, or smaller overlapped groups, and most likely some |
| holes.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>bigOverlap</code> - a list of ranges that overlap with each other</dd> |
| <dd><code>count</code> - the max number of ranges to find</dd> |
| <dt>Returns:</dt> |
| <dd>a list of ranges that overlap with most others</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
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