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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.heron.streamlet.impl</a></div> |
| <h2 title="Class StreamletBaseImpl" class="title">Class StreamletBaseImpl<R></h2> |
| </div> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.heron.streamlet.impl.StreamletBaseImpl<R></li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="../StreamletBase.html" title="interface in org.apache.heron.streamlet">StreamletBase</a><R></code></dd> |
| </dl> |
| <dl> |
| <dt>Direct Known Subclasses:</dt> |
| <dd><code><a href="streamlets/ConsumerStreamlet.html" title="class in org.apache.heron.streamlet.impl.streamlets">ConsumerStreamlet</a></code>, <code><a href="streamlets/LogStreamlet.html" title="class in org.apache.heron.streamlet.impl.streamlets">LogStreamlet</a></code>, <code><a href="streamlets/SinkStreamlet.html" title="class in org.apache.heron.streamlet.impl.streamlets">SinkStreamlet</a></code>, <code><a href="StreamletImpl.html" title="class in org.apache.heron.streamlet.impl">StreamletImpl</a></code></dd> |
| </dl> |
| <hr> |
| <pre>public abstract class <span class="typeNameLabel">StreamletBaseImpl<R></span> |
| extends java.lang.Object |
| implements <a href="../StreamletBase.html" title="interface in org.apache.heron.streamlet">StreamletBase</a><R></pre> |
| <div class="block">A Streamlet is a (potentially unbounded) ordered collection of tuples. |
| Streamlets originate from pub/sub systems(such Pulsar/Kafka), or from |
| static data(such as csv files, HDFS files), or for that matter any other |
| source. They are also created by transforming existing Streamlets using |
| operations such as map/flatMap, etc. |
| Besides the tuples, a Streamlet has the following properties associated with it |
| a) name. User assigned or system generated name to refer the streamlet |
| b) nPartitions. Number of partitions that the streamlet is composed of. Thus the |
| ordering of the tuples in a Streamlet is wrt the tuples within a partition. |
| This allows the system to distribute each partition to different nodes across the cluster. |
| A bunch of transformations can be done on Streamlets(like map/flatMap, etc.). Each |
| of these transformations operate on every tuple of the Streamlet and produce a new |
| Streamlet. One can think of a transformation attaching itself to the stream and processing |
| each tuple as they go by. Thus the parallelism of any operator is implicitly determined |
| by the number of partitions of the stream that it is operating on. If a particular |
| transformation wants to operate at a different parallelism, one can repartition the |
| Streamlet before doing the transformation.</div> |
| </li> |
| </ul> |
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| <th class="colSecond" scope="col">Class</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="StreamletBaseImpl.StreamletNamePrefix.html" title="enum in org.apache.heron.streamlet.impl">StreamletBaseImpl.StreamletNamePrefix</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
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| </li> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Field</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected java.lang.String</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#name">name</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected int</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#nPartitions">nPartitions</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| </table> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier</th> |
| <th class="colSecond" scope="col">Constructor</th> |
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| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected </code></td> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">StreamletBaseImpl</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Only used by the implementors</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </section> |
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| <section> |
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| </a> |
| <h3>Method Summary</h3> |
| <table class="memberSummary"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</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="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract 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="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><T> void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#addChild(org.apache.heron.streamlet.impl.StreamletBaseImpl)">addChild</a></span>​(<a href="StreamletBaseImpl.html" title="class in org.apache.heron.streamlet.impl">StreamletBaseImpl</a><T> child)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#build(org.apache.heron.api.topology.TopologyBuilder,java.util.Set)">build</a></span>​(<a href="../../api/topology/TopologyBuilder.html" title="class in org.apache.heron.api.topology">TopologyBuilder</a> bldr, |
| java.util.Set<java.lang.String> stageNames)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>protected abstract boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#doBuild(org.apache.heron.api.topology.TopologyBuilder,java.util.Set)">doBuild</a></span>​(<a href="../../api/topology/TopologyBuilder.html" title="class in org.apache.heron.api.topology">TopologyBuilder</a> bldr, |
| java.util.Set<java.lang.String> stageNames)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>java.util.List<<a href="StreamletBaseImpl.html" title="class in org.apache.heron.streamlet.impl">StreamletBaseImpl</a><?>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getChildren()">getChildren</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Gets all the children of this streamlet.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>java.lang.String</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getName()">getName</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Gets the name of the Streamlet.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getNumPartitions()">getNumPartitions</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Gets the number of partitions of this Streamlet.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isBuilt()">isBuilt</a></span>()</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isFullyBuilt()">isFullyBuilt</a></span>()</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setDefaultNameIfNone(org.apache.heron.streamlet.impl.StreamletBaseImpl.StreamletNamePrefix,java.util.Set)">setDefaultNameIfNone</a></span>​(<a href="StreamletBaseImpl.StreamletNamePrefix.html" title="enum in org.apache.heron.streamlet.impl">StreamletBaseImpl.StreamletNamePrefix</a> prefix, |
| java.util.Set<java.lang.String> stageNames)</code></th> |
| <td class="colLast"> |
| <div class="block">Sets a default unique name to the Streamlet by type if it is not set.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code><a href="../StreamletBase.html" title="interface in org.apache.heron.streamlet">StreamletBase</a><<a href="StreamletBaseImpl.html" title="type parameter in StreamletBaseImpl">R</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setName(java.lang.String)">setName</a></span>​(java.lang.String sName)</code></th> |
| <td class="colLast"> |
| <div class="block">Sets the name of the Streamlet.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code><a href="../StreamletBase.html" title="interface in org.apache.heron.streamlet">StreamletBase</a><<a href="StreamletBaseImpl.html" title="type parameter in StreamletBaseImpl">R</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setNumPartitions(int)">setNumPartitions</a></span>​(int numPartitions)</code></th> |
| <td class="colLast"> |
| <div class="block">Sets the number of partitions of the streamlet</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a id="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, toString, wait, wait, wait</code></li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <section> |
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| <!-- --> |
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| <h3>Field Detail</h3> |
| <a id="name"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>name</h4> |
| <pre>protected java.lang.String name</pre> |
| </li> |
| </ul> |
| <a id="nPartitions"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>nPartitions</h4> |
| <pre>protected int nPartitions</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <section> |
| <ul class="blockList"> |
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| <h3>Constructor Detail</h3> |
| <a id="<init>()"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>StreamletBaseImpl</h4> |
| <pre>protected StreamletBaseImpl()</pre> |
| <div class="block">Only used by the implementors</div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| <!-- ============ METHOD DETAIL ========== --> |
| <section> |
| <ul class="blockList"> |
| <li class="blockList"><a id="method.detail"> |
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| </a> |
| <h3>Method Detail</h3> |
| <a id="setName(java.lang.String)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setName</h4> |
| <pre class="methodSignature">public <a href="../StreamletBase.html" title="interface in org.apache.heron.streamlet">StreamletBase</a><<a href="StreamletBaseImpl.html" title="type parameter in StreamletBaseImpl">R</a>> setName​(java.lang.String sName)</pre> |
| <div class="block">Sets the name of the Streamlet.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../StreamletBase.html#setName(java.lang.String)">setName</a></code> in interface <code><a href="../StreamletBase.html" title="interface in org.apache.heron.streamlet">StreamletBase</a><<a href="StreamletBaseImpl.html" title="type parameter in StreamletBaseImpl">R</a>></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>sName</code> - The name given by the user for this streamlet</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Returns back the Streamlet with changed name</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getName()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getName</h4> |
| <pre class="methodSignature">public java.lang.String getName()</pre> |
| <div class="block">Gets the name of the Streamlet.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../StreamletBase.html#getName()">getName</a></code> in interface <code><a href="../StreamletBase.html" title="interface in org.apache.heron.streamlet">StreamletBase</a><<a href="StreamletBaseImpl.html" title="type parameter in StreamletBaseImpl">R</a>></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Returns the name of the Streamlet</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="setDefaultNameIfNone(org.apache.heron.streamlet.impl.StreamletBaseImpl.StreamletNamePrefix,java.util.Set)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setDefaultNameIfNone</h4> |
| <pre class="methodSignature">protected void setDefaultNameIfNone​(<a href="StreamletBaseImpl.StreamletNamePrefix.html" title="enum in org.apache.heron.streamlet.impl">StreamletBaseImpl.StreamletNamePrefix</a> prefix, |
| java.util.Set<java.lang.String> stageNames)</pre> |
| <div class="block">Sets a default unique name to the Streamlet by type if it is not set. |
| Otherwise, just checks its uniqueness.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>prefix</code> - The name prefix of this streamlet</dd> |
| <dd><code>stageNames</code> - The collections of created streamlet/stage names</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="setNumPartitions(int)"> |
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| </a> |
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| <h4>setNumPartitions</h4> |
| <pre class="methodSignature">public <a href="../StreamletBase.html" title="interface in org.apache.heron.streamlet">StreamletBase</a><<a href="StreamletBaseImpl.html" title="type parameter in StreamletBaseImpl">R</a>> setNumPartitions​(int numPartitions)</pre> |
| <div class="block">Sets the number of partitions of the streamlet</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../StreamletBase.html#setNumPartitions(int)">setNumPartitions</a></code> in interface <code><a href="../StreamletBase.html" title="interface in org.apache.heron.streamlet">StreamletBase</a><<a href="StreamletBaseImpl.html" title="type parameter in StreamletBaseImpl">R</a>></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>numPartitions</code> - The user assigned number of partitions</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Returns back the Streamlet with changed number of partitions</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="getNumPartitions()"> |
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| </a> |
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| <li class="blockList"> |
| <h4>getNumPartitions</h4> |
| <pre class="methodSignature">public int getNumPartitions()</pre> |
| <div class="block">Gets the number of partitions of this Streamlet.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../StreamletBase.html#getNumPartitions()">getNumPartitions</a></code> in interface <code><a href="../StreamletBase.html" title="interface in org.apache.heron.streamlet">StreamletBase</a><<a href="StreamletBaseImpl.html" title="type parameter in StreamletBaseImpl">R</a>></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the number of partitions of this Streamlet</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="addChild(org.apache.heron.streamlet.impl.StreamletBaseImpl)"> |
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| </a> |
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| <h4>addChild</h4> |
| <pre class="methodSignature">public <T> void addChild​(<a href="StreamletBaseImpl.html" title="class in org.apache.heron.streamlet.impl">StreamletBaseImpl</a><T> child)</pre> |
| </li> |
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| <h4>getChildren</h4> |
| <pre class="methodSignature">public java.util.List<<a href="StreamletBaseImpl.html" title="class in org.apache.heron.streamlet.impl">StreamletBaseImpl</a><?>> getChildren()</pre> |
| <div class="block">Gets all the children of this streamlet. |
| Children of a streamlet are streamlets that are resulting from transformations of elements of |
| this and potentially other streamlets.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The kid streamlets</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>build</h4> |
| <pre class="methodSignature">public void build​(<a href="../../api/topology/TopologyBuilder.html" title="class in org.apache.heron.api.topology">TopologyBuilder</a> bldr, |
| java.util.Set<java.lang.String> stageNames)</pre> |
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| <h4>doBuild</h4> |
| <pre class="methodSignature">protected abstract boolean doBuild​(<a href="../../api/topology/TopologyBuilder.html" title="class in org.apache.heron.api.topology">TopologyBuilder</a> bldr, |
| java.util.Set<java.lang.String> stageNames)</pre> |
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