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| <div class="subTitle">org.apache.kafka.streams.kstream</div> |
| <h2 title="Interface KGroupedTable" class="title">Interface KGroupedTable<K,V></h2> |
| </div> |
| <div class="contentContainer"> |
| <div class="description"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>K</code> - Type of primary keys</dd><dd><code>V</code> - Type of value changes</dd></dl> |
| <hr> |
| <br> |
| <pre>@InterfaceStability.Unstable |
| public interface <span class="strong">KGroupedTable<K,V></span></pre> |
| <div class="block"><a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KGroupedTable</code></a> is an abstraction of a <i>grouped changelog stream</i> from a primary-keyed table, |
| usually on a different grouping key than the original primary key. |
| <p> |
| It is an intermediate representation after a re-grouping of a <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a> before an aggregation is applied |
| to the new partitions resulting in a new <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a>.</div> |
| </li> |
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| <h3>Method Summary</h3> |
| <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span>Methods</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><T> <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream">KTable</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,T></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html#aggregate(org.apache.kafka.streams.kstream.Initializer,%20org.apache.kafka.streams.kstream.Aggregator,%20org.apache.kafka.streams.kstream.Aggregator,%20org.apache.kafka.common.serialization.Serde,%20java.lang.String)">aggregate</a></strong>(<a href="../../../../../org/apache/kafka/streams/kstream/Initializer.html" title="interface in org.apache.kafka.streams.kstream">Initializer</a><T> initializer, |
| <a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream">Aggregator</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>,T> adder, |
| <a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream">Aggregator</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>,T> substractor, |
| <a href="../../../../../org/apache/kafka/common/serialization/Serde.html" title="interface in org.apache.kafka.common.serialization">Serde</a><T> aggValueSerde, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</code> |
| <div class="block">Aggregate updating values of this stream by the selected key into a new instance of <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><T> <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream">KTable</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,T></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html#aggregate(org.apache.kafka.streams.kstream.Initializer,%20org.apache.kafka.streams.kstream.Aggregator,%20org.apache.kafka.streams.kstream.Aggregator,%20java.lang.String)">aggregate</a></strong>(<a href="../../../../../org/apache/kafka/streams/kstream/Initializer.html" title="interface in org.apache.kafka.streams.kstream">Initializer</a><T> initializer, |
| <a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream">Aggregator</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>,T> adder, |
| <a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream">Aggregator</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>,T> substractor, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</code> |
| <div class="block">Aggregate updating values of this stream by the selected key into a new instance of <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a> |
| using default serializers and deserializers.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream">KTable</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html#count(java.lang.String)">count</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</code> |
| <div class="block">Count number of records of this stream by the selected key into a new instance of <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream">KTable</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html#reduce(org.apache.kafka.streams.kstream.Reducer,%20org.apache.kafka.streams.kstream.Reducer,%20java.lang.String)">reduce</a></strong>(<a href="../../../../../org/apache/kafka/streams/kstream/Reducer.html" title="interface in org.apache.kafka.streams.kstream">Reducer</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>> adder, |
| <a href="../../../../../org/apache/kafka/streams/kstream/Reducer.html" title="interface in org.apache.kafka.streams.kstream">Reducer</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>> subtractor, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</code> |
| <div class="block">Combine updating values of this stream by the selected key into a new instance of <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a>.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
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| <h3>Method Detail</h3> |
| <a name="reduce(org.apache.kafka.streams.kstream.Reducer, org.apache.kafka.streams.kstream.Reducer, java.lang.String)"> |
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| <h4>reduce</h4> |
| <pre><a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream">KTable</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>> reduce(<a href="../../../../../org/apache/kafka/streams/kstream/Reducer.html" title="interface in org.apache.kafka.streams.kstream">Reducer</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>> adder, |
| <a href="../../../../../org/apache/kafka/streams/kstream/Reducer.html" title="interface in org.apache.kafka.streams.kstream">Reducer</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>> subtractor, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</pre> |
| <div class="block">Combine updating values of this stream by the selected key into a new instance of <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a>.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>adder</code> - the instance of <a href="../../../../../org/apache/kafka/streams/kstream/Reducer.html" title="interface in org.apache.kafka.streams.kstream"><code>Reducer</code></a> for addition</dd><dd><code>subtractor</code> - the instance of <a href="../../../../../org/apache/kafka/streams/kstream/Reducer.html" title="interface in org.apache.kafka.streams.kstream"><code>Reducer</code></a> for subtraction</dd><dd><code>name</code> - the name of the resulted <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a></dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a> with the same key and value types as this <a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KGroupedTable</code></a>, |
| containing aggregated values for each key</dd></dl> |
| </li> |
| </ul> |
| <a name="aggregate(org.apache.kafka.streams.kstream.Initializer, org.apache.kafka.streams.kstream.Aggregator, org.apache.kafka.streams.kstream.Aggregator, org.apache.kafka.common.serialization.Serde, java.lang.String)"> |
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| <h4>aggregate</h4> |
| <pre><T> <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream">KTable</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,T> aggregate(<a href="../../../../../org/apache/kafka/streams/kstream/Initializer.html" title="interface in org.apache.kafka.streams.kstream">Initializer</a><T> initializer, |
| <a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream">Aggregator</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>,T> adder, |
| <a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream">Aggregator</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>,T> substractor, |
| <a href="../../../../../org/apache/kafka/common/serialization/Serde.html" title="interface in org.apache.kafka.common.serialization">Serde</a><T> aggValueSerde, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</pre> |
| <div class="block">Aggregate updating values of this stream by the selected key into a new instance of <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a>.</div> |
| <dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>T</code> - the value type of the aggregated <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a></dd><dt><span class="strong">Parameters:</span></dt><dd><code>initializer</code> - the instance of <a href="../../../../../org/apache/kafka/streams/kstream/Initializer.html" title="interface in org.apache.kafka.streams.kstream"><code>Initializer</code></a></dd><dd><code>adder</code> - the instance of <a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream"><code>Aggregator</code></a> for addition</dd><dd><code>substractor</code> - the instance of <a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream"><code>Aggregator</code></a> for subtraction</dd><dd><code>aggValueSerde</code> - value serdes for materializing the aggregated table, |
| if not specified the default serdes defined in the configs will be used</dd><dd><code>name</code> - the name of the resulted table</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a> with same key and aggregated value type <code>T</code>, |
| containing aggregated values for each key</dd></dl> |
| </li> |
| </ul> |
| <a name="aggregate(org.apache.kafka.streams.kstream.Initializer, org.apache.kafka.streams.kstream.Aggregator, org.apache.kafka.streams.kstream.Aggregator, java.lang.String)"> |
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| <h4>aggregate</h4> |
| <pre><T> <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream">KTable</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,T> aggregate(<a href="../../../../../org/apache/kafka/streams/kstream/Initializer.html" title="interface in org.apache.kafka.streams.kstream">Initializer</a><T> initializer, |
| <a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream">Aggregator</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>,T> adder, |
| <a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream">Aggregator</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">V</a>,T> substractor, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</pre> |
| <div class="block">Aggregate updating values of this stream by the selected key into a new instance of <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a> |
| using default serializers and deserializers.</div> |
| <dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>T</code> - the value type of the aggregated <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a></dd><dt><span class="strong">Parameters:</span></dt><dd><code>initializer</code> - the instance of <a href="../../../../../org/apache/kafka/streams/kstream/Initializer.html" title="interface in org.apache.kafka.streams.kstream"><code>Initializer</code></a></dd><dd><code>adder</code> - the instance of <a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream"><code>Aggregator</code></a> for addition</dd><dd><code>substractor</code> - the instance of <a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream"><code>Aggregator</code></a> for subtraction</dd><dd><code>name</code> - the name of the resulted <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a></dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a> with same key and aggregated value type <code>T</code>, |
| containing aggregated values for each key</dd></dl> |
| </li> |
| </ul> |
| <a name="count(java.lang.String)"> |
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| </a> |
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| <h4>count</h4> |
| <pre><a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream">KTable</a><<a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="type parameter in KGroupedTable">K</a>,<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> count(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</pre> |
| <div class="block">Count number of records of this stream by the selected key into a new instance of <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a>.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>name</code> - the name of the resulted <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a></dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a> with same key and <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang"><code>Long</code></a> value type as this <a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KGroupedTable</code></a>, |
| containing the number of values for each key</dd></dl> |
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