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| <h2 title="Class Stream" class="title">Class Stream<T></h2> |
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| <ul class="inheritance"> |
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| <pre>public class <strong>Stream<T></strong> |
| extends java.lang.Object</pre> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.Sink.html" title="class in io.gearpump.streaming.dsl">Stream.Sink</a><<a href="../../../../io/gearpump/streaming/dsl/Stream.Sink.html" title="type parameter in Stream.Sink">T</a>></strong></code> </td> |
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| <th class="colOne" scope="col">Constructor and Description</th> |
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| <td class="colOne"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.html#Stream(io.gearpump.util.Graph, io.gearpump.streaming.dsl.op.Op, scala.Option)">Stream</a></strong>(io.gearpump.util.Graph<<a href="../../../../io/gearpump/streaming/dsl/op/Op.html" title="interface in io.gearpump.streaming.dsl.op">Op</a>,<a href="../../../../io/gearpump/streaming/dsl/op/OpEdge.html" title="interface in io.gearpump.streaming.dsl.op">OpEdge</a>> graph, |
| <a href="../../../../io/gearpump/streaming/dsl/op/Op.html" title="interface in io.gearpump.streaming.dsl.op">Op</a> thisNode, |
| scala.Option<<a href="../../../../io/gearpump/streaming/dsl/op/OpEdge.html" title="interface in io.gearpump.streaming.dsl.op">OpEdge</a>> edge)</code> </td> |
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| <h3>Method Summary</h3> |
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| <caption><span>Methods</span><span class="tabEnd"> </span></caption> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
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| <td class="colFirst"><code>static <T> <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><T></code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.html#apply(io.gearpump.util.Graph, io.gearpump.streaming.dsl.op.Op, scala.Option)">apply</a></strong>(io.gearpump.util.Graph<<a href="../../../../io/gearpump/streaming/dsl/op/Op.html" title="interface in io.gearpump.streaming.dsl.op">Op</a>,<a href="../../../../io/gearpump/streaming/dsl/op/OpEdge.html" title="interface in io.gearpump.streaming.dsl.op">OpEdge</a>> graph, |
| <a href="../../../../io/gearpump/streaming/dsl/op/Op.html" title="interface in io.gearpump.streaming.dsl.op">Op</a> node, |
| scala.Option<<a href="../../../../io/gearpump/streaming/dsl/op/OpEdge.html" title="interface in io.gearpump.streaming.dsl.op">OpEdge</a>> edge)</code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>></code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.html#filter(scala.Function1, java.lang.String)">filter</a></strong>(scala.Function1<<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>,java.lang.Object> fun, |
| java.lang.String description)</code> |
| <div class="block">reserve records when fun(T) == true</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><R> <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><R></code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.html#flatMap(scala.Function1, java.lang.String)">flatMap</a></strong>(scala.Function1<<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>,scala.collection.TraversableOnce<R>> fun, |
| java.lang.String description)</code> |
| <div class="block">convert a value[T] to a list of value[R]</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <K,V> K</code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.html#getTupleKey(scala.Tuple2)">getTupleKey</a></strong>(scala.Tuple2<K,V> tuple)</code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><Group> <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>></code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.html#groupBy(scala.Function1, int, java.lang.String)">groupBy</a></strong>(scala.Function1<<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>,Group> fun, |
| int parallelism, |
| java.lang.String description)</code> |
| <div class="block">Group by fun(T)</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.html#log()">log</a></strong>()</code> |
| <div class="block">Log to task log file</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><R> <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><R></code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.html#map(scala.Function1, java.lang.String)">map</a></strong>(scala.Function1<<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>,R> fun, |
| java.lang.String description)</code> |
| <div class="block">convert value[T] to value[R]</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>></code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.html#merge(io.gearpump.streaming.dsl.Stream, java.lang.String)">merge</a></strong>(<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>> other, |
| java.lang.String description)</code> |
| <div class="block">Merge data from two stream into one</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><R> <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><R></code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.html#process(java.lang.Class, int, io.gearpump.cluster.UserConfig, java.lang.String)">process</a></strong>(java.lang.Class<? extends <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task">Task</a>> processor, |
| int parallism, |
| io.gearpump.cluster.UserConfig conf, |
| java.lang.String description)</code> |
| <div class="block">connect with a low level Processor(TaskDescription)</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>></code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.html#reduce(scala.Function2, java.lang.String)">reduce</a></strong>(scala.Function2<<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>,<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>,<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>> fun, |
| java.lang.String description)</code> |
| <div class="block">Reduce opeartion</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <K,V> <a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="class in io.gearpump.streaming.dsl">KVStream</a><K,V></code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.html#streamToKVStream(io.gearpump.streaming.dsl.Stream)">streamToKVStream</a></strong>(<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><scala.Tuple2<K,V>> stream)</code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <K,V> scala.Function2<scala.Tuple2<K,V>,scala.Tuple2<K,V>,scala.Tuple2<K,V>></code></td> |
| <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/dsl/Stream.html#sumByValue(scala.math.Numeric)">sumByValue</a></strong>(scala.math.Numeric<V> numeric)</code> </td> |
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| </a> |
| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
| </ul> |
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| <h3>Constructor Detail</h3> |
| <a name="Stream(io.gearpump.util.Graph, io.gearpump.streaming.dsl.op.Op, scala.Option)"> |
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| </a> |
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| <h4>Stream</h4> |
| <pre>public Stream(io.gearpump.util.Graph<<a href="../../../../io/gearpump/streaming/dsl/op/Op.html" title="interface in io.gearpump.streaming.dsl.op">Op</a>,<a href="../../../../io/gearpump/streaming/dsl/op/OpEdge.html" title="interface in io.gearpump.streaming.dsl.op">OpEdge</a>> graph, |
| <a href="../../../../io/gearpump/streaming/dsl/op/Op.html" title="interface in io.gearpump.streaming.dsl.op">Op</a> thisNode, |
| scala.Option<<a href="../../../../io/gearpump/streaming/dsl/op/OpEdge.html" title="interface in io.gearpump.streaming.dsl.op">OpEdge</a>> edge)</pre> |
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| <h3>Method Detail</h3> |
| <a name="apply(io.gearpump.util.Graph, io.gearpump.streaming.dsl.op.Op, scala.Option)"> |
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| </a> |
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| <h4>apply</h4> |
| <pre>public static <T> <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><T> apply(io.gearpump.util.Graph<<a href="../../../../io/gearpump/streaming/dsl/op/Op.html" title="interface in io.gearpump.streaming.dsl.op">Op</a>,<a href="../../../../io/gearpump/streaming/dsl/op/OpEdge.html" title="interface in io.gearpump.streaming.dsl.op">OpEdge</a>> graph, |
| <a href="../../../../io/gearpump/streaming/dsl/op/Op.html" title="interface in io.gearpump.streaming.dsl.op">Op</a> node, |
| scala.Option<<a href="../../../../io/gearpump/streaming/dsl/op/OpEdge.html" title="interface in io.gearpump.streaming.dsl.op">OpEdge</a>> edge)</pre> |
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| <h4>getTupleKey</h4> |
| <pre>public static <K,V> K getTupleKey(scala.Tuple2<K,V> tuple)</pre> |
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| <h4>sumByValue</h4> |
| <pre>public static <K,V> scala.Function2<scala.Tuple2<K,V>,scala.Tuple2<K,V>,scala.Tuple2<K,V>> sumByValue(scala.math.Numeric<V> numeric)</pre> |
| </li> |
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| <a name="streamToKVStream(io.gearpump.streaming.dsl.Stream)"> |
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| <h4>streamToKVStream</h4> |
| <pre>public static <K,V> <a href="../../../../io/gearpump/streaming/dsl/KVStream.html" title="class in io.gearpump.streaming.dsl">KVStream</a><K,V> streamToKVStream(<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><scala.Tuple2<K,V>> stream)</pre> |
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| <h4>flatMap</h4> |
| <pre>public <R> <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><R> flatMap(scala.Function1<<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>,scala.collection.TraversableOnce<R>> fun, |
| java.lang.String description)</pre> |
| <div class="block">convert a value[T] to a list of value[R]</div> |
| <dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>R</code> - the result message type</dd><dt><span class="strong">Parameters:</span></dt><dd><code>fun</code> - function</dd><dd><code>description</code> - the description message for this operation</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a new stream with type [R]</dd></dl> |
| </li> |
| </ul> |
| <a name="map(scala.Function1, java.lang.String)"> |
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| <h4>map</h4> |
| <pre>public <R> <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><R> map(scala.Function1<<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>,R> fun, |
| java.lang.String description)</pre> |
| <div class="block">convert value[T] to value[R]</div> |
| <dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>R</code> - the result message type</dd><dt><span class="strong">Parameters:</span></dt><dd><code>fun</code> - function</dd><dd><code>description</code> - (undocumented)</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a new stream with type [R]</dd></dl> |
| </li> |
| </ul> |
| <a name="filter(scala.Function1, java.lang.String)"> |
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| <h4>filter</h4> |
| <pre>public <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>> filter(scala.Function1<<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>,java.lang.Object> fun, |
| java.lang.String description)</pre> |
| <div class="block">reserve records when fun(T) == true</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>fun</code> - the filter</dd><dd><code>description</code> - (undocumented)</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a new stream after filter</dd></dl> |
| </li> |
| </ul> |
| <a name="reduce(scala.Function2, java.lang.String)"> |
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| <h4>reduce</h4> |
| <pre>public <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>> reduce(scala.Function2<<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>,<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>,<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>> fun, |
| java.lang.String description)</pre> |
| <div class="block">Reduce opeartion</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>fun</code> - reduction function</dd><dd><code>description</code> - description message for this operator</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a new stream after reduction</dd></dl> |
| </li> |
| </ul> |
| <a name="log()"> |
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| <h4>log</h4> |
| <pre>public void log()</pre> |
| <div class="block">Log to task log file</div> |
| </li> |
| </ul> |
| <a name="merge(io.gearpump.streaming.dsl.Stream, java.lang.String)"> |
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| <h4>merge</h4> |
| <pre>public <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>> merge(<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>> other, |
| java.lang.String description)</pre> |
| <div class="block">Merge data from two stream into one</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>other</code> - the other stream</dd><dd><code>description</code> - (undocumented)</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>the merged stream</dd></dl> |
| </li> |
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| <a name="groupBy(scala.Function1, int, java.lang.String)"> |
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| <h4>groupBy</h4> |
| <pre>public <Group> <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>> groupBy(scala.Function1<<a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="type parameter in Stream">T</a>,Group> fun, |
| int parallelism, |
| java.lang.String description)</pre> |
| <div class="block">Group by fun(T) |
| <p> |
| For example, we have T type, People(name: String, gender: String, age: Int) |
| groupBy[People](_.gender) will group the people by gender. |
| <p> |
| You can append other combinators after groupBy |
| <p> |
| For example, |
| <p> |
| Stream[People].groupBy(_.gender).flatmap(..).filter.(..).reduce(..) |
| <p></div> |
| <dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>Group</code> - the group type</dd><dt><span class="strong">Parameters:</span></dt><dd><code>fun</code> - group by function</dd><dd><code>parallelism</code> - parallelism level</dd><dd><code>description</code> - the description</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>the grouped stream</dd></dl> |
| </li> |
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| <a name="process(java.lang.Class, int, io.gearpump.cluster.UserConfig, java.lang.String)"> |
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| <h4>process</h4> |
| <pre>public <R> <a href="../../../../io/gearpump/streaming/dsl/Stream.html" title="class in io.gearpump.streaming.dsl">Stream</a><R> process(java.lang.Class<? extends <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task">Task</a>> processor, |
| int parallism, |
| io.gearpump.cluster.UserConfig conf, |
| java.lang.String description)</pre> |
| <div class="block">connect with a low level Processor(TaskDescription)</div> |
| <dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>R</code> - the result message type</dd><dt><span class="strong">Parameters:</span></dt><dd><code>processor</code> - a user defined processor</dd><dd><code>parallelism</code> - parallelism level</dd><dd><code>parallism</code> - (undocumented)</dd><dd><code>conf</code> - (undocumented)</dd><dd><code>description</code> - (undocumented)</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>new stream after processing with type [R]</dd></dl> |
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