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<h1 title="Package" class="title">Package&nbsp;org.apache.kafka.streams.kstream</h1>
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<caption><span>Interface Summary</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Interface</th>
<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream">Aggregator</a>&lt;K,V,T&gt;</td>
<td class="colLast">
<div class="block">The <a href="../../../../../org/apache/kafka/streams/kstream/Aggregator.html" title="interface in org.apache.kafka.streams.kstream"><code>Aggregator</code></a> interface for aggregating values of the given key.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/ForeachAction.html" title="interface in org.apache.kafka.streams.kstream">ForeachAction</a>&lt;K,V&gt;</td>
<td class="colLast">
<div class="block">The <a href="../../../../../org/apache/kafka/streams/kstream/ForeachAction.html" title="interface in org.apache.kafka.streams.kstream"><code>ForeachAction</code></a> interface for performing an action on a key-value pair.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/Initializer.html" title="interface in org.apache.kafka.streams.kstream">Initializer</a>&lt;T&gt;</td>
<td class="colLast">
<div class="block">The <a href="../../../../../org/apache/kafka/streams/kstream/Initializer.html" title="interface in org.apache.kafka.streams.kstream"><code>Initializer</code></a> interface for creating an initial value in aggregations.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/KeyValueMapper.html" title="interface in org.apache.kafka.streams.kstream">KeyValueMapper</a>&lt;K,V,R&gt;</td>
<td class="colLast">
<div class="block">The <a href="../../../../../org/apache/kafka/streams/kstream/KeyValueMapper.html" title="interface in org.apache.kafka.streams.kstream"><code>KeyValueMapper</code></a> interface for mapping a key-value pair to a new value (could be another key-value pair).</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/KGroupedTable.html" title="interface in org.apache.kafka.streams.kstream">KGroupedTable</a>&lt;K,V&gt;</td>
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<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.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/KStream.html" title="interface in org.apache.kafka.streams.kstream">KStream</a>&lt;K,V&gt;</td>
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<div class="block"><a href="../../../../../org/apache/kafka/streams/kstream/KStream.html" title="interface in org.apache.kafka.streams.kstream"><code>KStream</code></a> is an abstraction of a <i>record stream</i> of key-value pairs.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream">KTable</a>&lt;K,V&gt;</td>
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<div class="block"><a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a> is an abstraction of a <i>changelog stream</i> from a primary-keyed table.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/Predicate.html" title="interface in org.apache.kafka.streams.kstream">Predicate</a>&lt;K,V&gt;</td>
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<div class="block">The <a href="../../../../../org/apache/kafka/streams/kstream/Predicate.html" title="interface in org.apache.kafka.streams.kstream"><code>Predicate</code></a> interface represents a predicate (boolean-valued function) of a key-value pair.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/Reducer.html" title="interface in org.apache.kafka.streams.kstream">Reducer</a>&lt;V&gt;</td>
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<div class="block">The <a href="../../../../../org/apache/kafka/streams/kstream/Reducer.html" title="interface in org.apache.kafka.streams.kstream"><code>Reducer</code></a> interface for combining two values of the same type into a new value.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/Transformer.html" title="interface in org.apache.kafka.streams.kstream">Transformer</a>&lt;K,V,R&gt;</td>
<td class="colLast">
<div class="block">A stateful <a href="../../../../../org/apache/kafka/streams/kstream/Transformer.html" title="interface in org.apache.kafka.streams.kstream"><code>Transformer</code></a> interface for transform a key-value pair into a new value.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/TransformerSupplier.html" title="interface in org.apache.kafka.streams.kstream">TransformerSupplier</a>&lt;K,V,R&gt;</td>
<td class="colLast">
<div class="block">A <a href="../../../../../org/apache/kafka/streams/kstream/TransformerSupplier.html" title="interface in org.apache.kafka.streams.kstream"><code>TransformerSupplier</code></a> interface which can create one or more <a href="../../../../../org/apache/kafka/streams/kstream/Transformer.html" title="interface in org.apache.kafka.streams.kstream"><code>Transformer</code></a> instances.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/ValueJoiner.html" title="interface in org.apache.kafka.streams.kstream">ValueJoiner</a>&lt;V1,V2,R&gt;</td>
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<div class="block">The <a href="../../../../../org/apache/kafka/streams/kstream/ValueJoiner.html" title="interface in org.apache.kafka.streams.kstream"><code>ValueJoiner</code></a> interface for joining two values into a new value.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/ValueMapper.html" title="interface in org.apache.kafka.streams.kstream">ValueMapper</a>&lt;V1,V2&gt;</td>
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<div class="block">The <a href="../../../../../org/apache/kafka/streams/kstream/ValueMapper.html" title="interface in org.apache.kafka.streams.kstream"><code>ValueMapper</code></a> interface for mapping an original value to a new value (could be another key-value pair).</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/ValueTransformer.html" title="interface in org.apache.kafka.streams.kstream">ValueTransformer</a>&lt;V,R&gt;</td>
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<div class="block">A stateful <a href="../../../../../org/apache/kafka/streams/kstream/ValueTransformer.html" title="interface in org.apache.kafka.streams.kstream"><code>ValueTransformer</code></a> interface to transform a value into a new value.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/ValueTransformerSupplier.html" title="interface in org.apache.kafka.streams.kstream">ValueTransformerSupplier</a>&lt;V,R&gt;</td>
<td class="colLast">
<div class="block">A <a href="../../../../../org/apache/kafka/streams/kstream/ValueTransformerSupplier.html" title="interface in org.apache.kafka.streams.kstream"><code>ValueTransformerSupplier</code></a> interface which can create one or more <a href="../../../../../org/apache/kafka/streams/kstream/ValueTransformer.html" title="interface in org.apache.kafka.streams.kstream"><code>ValueTransformer</code></a> instances.</div>
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<table class="packageSummary" border="0" cellpadding="3" cellspacing="0" summary="Class Summary table, listing classes, and an explanation">
<caption><span>Class Summary</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Class</th>
<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/JoinWindows.html" title="class in org.apache.kafka.streams.kstream">JoinWindows</a></td>
<td class="colLast">
<div class="block">The window specifications used for joins.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/KStreamBuilder.html" title="class in org.apache.kafka.streams.kstream">KStreamBuilder</a></td>
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<div class="block"><a href="../../../../../org/apache/kafka/streams/kstream/KStreamBuilder.html" title="class in org.apache.kafka.streams.kstream"><code>KStreamBuilder</code></a> is a subclass of <a href="../../../../../org/apache/kafka/streams/processor/TopologyBuilder.html" title="class in org.apache.kafka.streams.processor"><code>TopologyBuilder</code></a> that provides the Kafka Streams DSL
for users to specify computational logic and translates the given logic to a <code>org.apache.kafka.streams.processor.internals.ProcessorTopology</code>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/TimeWindows.html" title="class in org.apache.kafka.streams.kstream">TimeWindows</a></td>
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<div class="block">The time-based window specifications used for aggregations.</div>
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<tr class="rowColor">
<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/UnlimitedWindows.html" title="class in org.apache.kafka.streams.kstream">UnlimitedWindows</a></td>
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<div class="block">The unlimited window specifications.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/Window.html" title="class in org.apache.kafka.streams.kstream">Window</a></td>
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<div class="block">A single window instance, defined by its start and end timestamp.</div>
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/Windowed.html" title="class in org.apache.kafka.streams.kstream">Windowed</a>&lt;K&gt;</td>
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<div class="block">The windowed key interface used in <a href="../../../../../org/apache/kafka/streams/kstream/KTable.html" title="interface in org.apache.kafka.streams.kstream"><code>KTable</code></a>, used for representing a windowed table result from windowed stream aggregations,
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<td class="colFirst"><a href="../../../../../org/apache/kafka/streams/kstream/Windows.html" title="class in org.apache.kafka.streams.kstream">Windows</a>&lt;W extends <a href="../../../../../org/apache/kafka/streams/kstream/Window.html" title="class in org.apache.kafka.streams.kstream">Window</a>&gt;</td>
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<div class="block">The window specification interface that can be extended for windowing operation in joins and aggregations.</div>
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