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| <p class="subTitle">io.gearpump.streaming.dsl</p> |
| <h2 title="Class KVStream" class="title">Class KVStream<K,V></h2> |
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| <pre>public class <strong>KVStream<K,V></strong> |
| extends java.lang.Object</pre> |
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| <td class="colOne"><code><strong><a href="../../../../io/gearpump/streaming/dsl/KVStream.html#KVStream(io.gearpump.streaming.dsl.Stream)">KVStream</a></strong>(<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><scala.Tuple2<<a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="type parameter in KVStream">K</a>,<a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="type parameter in KVStream">V</a>>> stream)</code> </td> |
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| <td class="colFirst"><code><a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><scala.Tuple2<<a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="type parameter in KVStream">K</a>,<a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="type parameter in KVStream">V</a>>></code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/KVStream.html#groupByKey(int)">groupByKey</a></strong>(int parallelism)</code> |
| <div class="block">Apply to Stream[Tuple2[K,V} |
| Group by the key of a KV tuple |
| For (key, value) will groupby key</div> |
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| <td class="colFirst"><code><a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><scala.Tuple2<<a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="type parameter in KVStream">K</a>,<a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="type parameter in KVStream">V</a>>></code></td> |
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| <h4>KVStream</h4> |
| <pre>public KVStream(<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><scala.Tuple2<<a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="type parameter in KVStream">K</a>,<a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="type parameter in KVStream">V</a>>> stream)</pre> |
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| <h4>groupByKey</h4> |
| <pre>public <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><scala.Tuple2<<a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="type parameter in KVStream">K</a>,<a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="type parameter in KVStream">V</a>>> groupByKey(int parallelism)</pre> |
| <div class="block">Apply to Stream[Tuple2[K,V} |
| Group by the key of a KV tuple |
| For (key, value) will groupby key</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>parallelism</code> - the parallelism for this operation</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>the new KV stream</dd></dl> |
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| <h4>sum</h4> |
| <pre>public <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><scala.Tuple2<<a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="type parameter in KVStream">K</a>,<a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="type parameter in KVStream">V</a>>> sum(scala.math.Numeric<<a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="type parameter in KVStream">V</a>> numeric)</pre> |
| <div class="block">Sum the value of the tuples |
| <p> |
| Apply to Stream[Tuple2[K,V}, V must be of type Number |
| <p> |
| For input (key, value1), (key, value2), will generate (key, value1 + value2)</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>numeric</code> - the numeric operations</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>the sum stream</dd></dl> |
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