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| <div class="subTitle">org.apache.beam.sdk.io.range</div> |
| <h2 title="Class ByteKeyRangeTracker" class="title">Class ByteKeyRangeTracker</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.beam.sdk.io.range.ByteKeyRangeTracker</li> |
| </ul> |
| </li> |
| </ul> |
| <div class="description"> |
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| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html" title="interface in org.apache.beam.sdk.io.range">RangeTracker</a><<a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a>></dd> |
| </dl> |
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| <br> |
| <pre>public final class <span class="typeNameLabel">ByteKeyRangeTracker</span> |
| extends java.lang.Object |
| implements <a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html" title="interface in org.apache.beam.sdk.io.range">RangeTracker</a><<a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a>></pre> |
| <div class="block">A <a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html" title="interface in org.apache.beam.sdk.io.range"><code>RangeTracker</code></a> for <a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range"><code>ByteKeys</code></a> in <a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRange.html" title="class in org.apache.beam.sdk.io.range"><code>ByteKeyRanges</code></a>.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range"><code>ByteKey</code></a>, |
| <a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRange.html" title="class in org.apache.beam.sdk.io.range"><code>ByteKeyRange</code></a></dd> |
| </dl> |
| </li> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html#getFractionConsumed--">getFractionConsumed</a></span>()</code> |
| <div class="block">Returns the approximate fraction of positions in the source that have been consumed by |
| successful <a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#tryReturnRecordAt-boolean-PositionT-"><code>RangeTracker.tryReturnRecordAt(boolean, PositionT)</code></a> calls, or 0.0 if no such calls have happened.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRange.html" title="class in org.apache.beam.sdk.io.range">ByteKeyRange</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html#getRange--">getRange</a></span>()</code> |
| <div class="block">Returns the current range.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html#getSplitPointsConsumed--">getSplitPointsConsumed</a></span>()</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html#getStartPosition--">getStartPosition</a></span>()</code> |
| <div class="block">Returns the starting position of the current range, inclusive.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html#getStopPosition--">getStopPosition</a></span>()</code> |
| <div class="block">Returns the ending position of the current range, exclusive.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html#isDone--">isDone</a></span>()</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html#markDone--">markDone</a></span>()</code> |
| <div class="block">Marks this range tracker as being done.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html" title="class in org.apache.beam.sdk.io.range">ByteKeyRangeTracker</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html#of-org.apache.beam.sdk.io.range.ByteKeyRange-">of</a></span>(<a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRange.html" title="class in org.apache.beam.sdk.io.range">ByteKeyRange</a> range)</code> |
| <div class="block">Instantiates a new <a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html" title="class in org.apache.beam.sdk.io.range"><code>ByteKeyRangeTracker</code></a> with the specified range.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>java.lang.String</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html#toString--">toString</a></span>()</code> </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html#tryReturnRecordAt-boolean-org.apache.beam.sdk.io.range.ByteKey-">tryReturnRecordAt</a></span>(boolean isAtSplitPoint, |
| <a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a> recordStart)</code> |
| <div class="block">Atomically determines whether a record at the given position can be returned and updates |
| internal state.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html#trySplitAtPosition-org.apache.beam.sdk.io.range.ByteKey-">trySplitAtPosition</a></span>(<a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a> splitPosition)</code> |
| <div class="block">Atomically splits the current range [<a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStartPosition--"><code>RangeTracker.getStartPosition()</code></a>, <a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStopPosition--"><code>RangeTracker.getStopPosition()</code></a>) into |
| a "primary" part [<a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStartPosition--"><code>RangeTracker.getStartPosition()</code></a>, <code>splitPosition</code>) and a "residual" part |
| [<code>splitPosition</code>, <a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStopPosition--"><code>RangeTracker.getStopPosition()</code></a>), assuming the current last-consumed position |
| is within [<a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStartPosition--"><code>RangeTracker.getStartPosition()</code></a>, splitPosition) (i.e., <code>splitPosition</code> has not been |
| consumed yet).</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ METHOD DETAIL ========== --> |
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| </a> |
| <h3>Method Detail</h3> |
| <a name="of-org.apache.beam.sdk.io.range.ByteKeyRange-"> |
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| <ul class="blockList"> |
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| <h4>of</h4> |
| <pre>public static <a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html" title="class in org.apache.beam.sdk.io.range">ByteKeyRangeTracker</a> of(<a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRange.html" title="class in org.apache.beam.sdk.io.range">ByteKeyRange</a> range)</pre> |
| <div class="block">Instantiates a new <a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRangeTracker.html" title="class in org.apache.beam.sdk.io.range"><code>ByteKeyRangeTracker</code></a> with the specified range.</div> |
| </li> |
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| <a name="isDone--"> |
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| <h4>isDone</h4> |
| <pre>public boolean isDone()</pre> |
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| <a name="getStartPosition--"> |
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| </a> |
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| <li class="blockList"> |
| <h4>getStartPosition</h4> |
| <pre>public <a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a> getStartPosition()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStartPosition--">RangeTracker</a></code></span></div> |
| <div class="block">Returns the starting position of the current range, inclusive.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStartPosition--">getStartPosition</a></code> in interface <code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html" title="interface in org.apache.beam.sdk.io.range">RangeTracker</a><<a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a>></code></dd> |
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| <a name="getStopPosition--"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>getStopPosition</h4> |
| <pre>public <a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a> getStopPosition()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStopPosition--">RangeTracker</a></code></span></div> |
| <div class="block">Returns the ending position of the current range, exclusive.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStopPosition--">getStopPosition</a></code> in interface <code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html" title="interface in org.apache.beam.sdk.io.range">RangeTracker</a><<a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a>></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getRange--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getRange</h4> |
| <pre>public <a href="../../../../../../org/apache/beam/sdk/io/range/ByteKeyRange.html" title="class in org.apache.beam.sdk.io.range">ByteKeyRange</a> getRange()</pre> |
| <div class="block">Returns the current range.</div> |
| </li> |
| </ul> |
| <a name="tryReturnRecordAt-boolean-org.apache.beam.sdk.io.range.ByteKey-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>tryReturnRecordAt</h4> |
| <pre>public boolean tryReturnRecordAt(boolean isAtSplitPoint, |
| <a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a> recordStart)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#tryReturnRecordAt-boolean-PositionT-">RangeTracker</a></code></span></div> |
| <div class="block">Atomically determines whether a record at the given position can be returned and updates |
| internal state. In particular: |
| |
| <ul> |
| <li>If <code>isAtSplitPoint</code> is <code>true</code>, and <code>recordStart</code> is outside the current |
| range, returns <code>false</code>; |
| <li>Otherwise, updates the last-consumed position to <code>recordStart</code> and returns <code>true</code>. |
| </ul> |
| |
| <p>This method MUST be called on all split point records. It may be called on every record.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#tryReturnRecordAt-boolean-PositionT-">tryReturnRecordAt</a></code> in interface <code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html" title="interface in org.apache.beam.sdk.io.range">RangeTracker</a><<a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a>></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="trySplitAtPosition-org.apache.beam.sdk.io.range.ByteKey-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>trySplitAtPosition</h4> |
| <pre>public boolean trySplitAtPosition(<a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a> splitPosition)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#trySplitAtPosition-PositionT-">RangeTracker</a></code></span></div> |
| <div class="block">Atomically splits the current range [<a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStartPosition--"><code>RangeTracker.getStartPosition()</code></a>, <a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStopPosition--"><code>RangeTracker.getStopPosition()</code></a>) into |
| a "primary" part [<a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStartPosition--"><code>RangeTracker.getStartPosition()</code></a>, <code>splitPosition</code>) and a "residual" part |
| [<code>splitPosition</code>, <a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStopPosition--"><code>RangeTracker.getStopPosition()</code></a>), assuming the current last-consumed position |
| is within [<a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getStartPosition--"><code>RangeTracker.getStartPosition()</code></a>, splitPosition) (i.e., <code>splitPosition</code> has not been |
| consumed yet). |
| |
| <p>Updates the current range to be the primary and returns <code>true</code>. This means that all |
| further calls on the current object will interpret their arguments relative to the primary |
| range. |
| |
| <p>If the split position has already been consumed, or if no <a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#tryReturnRecordAt-boolean-PositionT-"><code>RangeTracker.tryReturnRecordAt(boolean, PositionT)</code></a> call |
| was made yet, returns <code>false</code>. The second condition is to prevent dynamic splitting |
| during reader start-up.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#trySplitAtPosition-PositionT-">trySplitAtPosition</a></code> in interface <code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html" title="interface in org.apache.beam.sdk.io.range">RangeTracker</a><<a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a>></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getFractionConsumed--"> |
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| </a> |
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| <h4>getFractionConsumed</h4> |
| <pre>public double getFractionConsumed()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getFractionConsumed--">RangeTracker</a></code></span></div> |
| <div class="block">Returns the approximate fraction of positions in the source that have been consumed by |
| successful <a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#tryReturnRecordAt-boolean-PositionT-"><code>RangeTracker.tryReturnRecordAt(boolean, PositionT)</code></a> calls, or 0.0 if no such calls have happened.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html#getFractionConsumed--">getFractionConsumed</a></code> in interface <code><a href="../../../../../../org/apache/beam/sdk/io/range/RangeTracker.html" title="interface in org.apache.beam.sdk.io.range">RangeTracker</a><<a href="../../../../../../org/apache/beam/sdk/io/range/ByteKey.html" title="class in org.apache.beam.sdk.io.range">ByteKey</a>></code></dd> |
| </dl> |
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| <h4>getSplitPointsConsumed</h4> |
| <pre>public long getSplitPointsConsumed()</pre> |
| </li> |
| </ul> |
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| <pre>public boolean markDone()</pre> |
| <div class="block">Marks this range tracker as being done. Specifically, this will mark the current split point, |
| if one exists, as being finished. |
| |
| <p>Always returns false, so that it can be used in an implementation of <a href="../../../../../../org/apache/beam/sdk/io/Source.Reader.html#start--"><code>Source.Reader.start()</code></a> or <a href="../../../../../../org/apache/beam/sdk/io/Source.Reader.html#advance--"><code>Source.Reader.advance()</code></a> as follows: |
| |
| <pre><code> |
| public boolean start() { |
| return startImpl() && rangeTracker.tryReturnRecordAt(isAtSplitPoint, position) |
| || rangeTracker.markDone(); |
| } |
| </code></pre></div> |
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