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<div class="subTitle">org.apache.storm.topology</div>
<h2 title="Interface IComponent" class="title">Interface IComponent</h2>
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<dt>All Superinterfaces:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></dd>
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<dt>All Known Subinterfaces:</dt>
<dd><a href="../../../../org/apache/storm/topology/IBasicBolt.html" title="interface in org.apache.storm.topology">IBasicBolt</a>, <a href="../../../../org/apache/storm/coordination/IBatchBolt.html" title="interface in org.apache.storm.coordination">IBatchBolt</a>&lt;T&gt;, <a href="../../../../org/apache/storm/topology/IRichBolt.html" title="interface in org.apache.storm.topology">IRichBolt</a>, <a href="../../../../org/apache/storm/topology/IRichSpout.html" title="interface in org.apache.storm.topology">IRichSpout</a>, <a href="../../../../org/apache/storm/topology/IRichStateSpout.html" title="interface in org.apache.storm.topology">IRichStateSpout</a>, <a href="../../../../org/apache/storm/topology/IStatefulBolt.html" title="interface in org.apache.storm.topology">IStatefulBolt</a>&lt;T&gt;, <a href="../../../../org/apache/storm/topology/IStatefulComponent.html" title="interface in org.apache.storm.topology">IStatefulComponent</a>&lt;T&gt;, <a href="../../../../org/apache/storm/topology/IStatefulWindowedBolt.html" title="interface in org.apache.storm.topology">IStatefulWindowedBolt</a>&lt;T&gt;, <a href="../../../../org/apache/storm/trident/topology/ITridentBatchBolt.html" title="interface in org.apache.storm.trident.topology">ITridentBatchBolt</a>, <a href="../../../../org/apache/storm/topology/IWindowedBolt.html" title="interface in org.apache.storm.topology">IWindowedBolt</a></dd>
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<dl>
<dt>All Known Implementing Classes:</dt>
<dd><a href="../../../../org/apache/storm/elasticsearch/bolt/AbstractEsBolt.html" title="class in org.apache.storm.elasticsearch.bolt">AbstractEsBolt</a>, <a href="../../../../org/apache/storm/hbase/bolt/AbstractHBaseBolt.html" title="class in org.apache.storm.hbase.bolt">AbstractHBaseBolt</a>, <a href="../../../../org/apache/storm/hdfs/bolt/AbstractHdfsBolt.html" title="class in org.apache.storm.hdfs.bolt">AbstractHdfsBolt</a>, <a href="../../../../org/apache/storm/jdbc/bolt/AbstractJdbcBolt.html" title="class in org.apache.storm.jdbc.bolt">AbstractJdbcBolt</a>, <a href="../../../../org/apache/storm/mongodb/bolt/AbstractMongoBolt.html" title="class in org.apache.storm.mongodb.bolt">AbstractMongoBolt</a>, <a href="../../../../org/apache/storm/starter/bolt/AbstractRankerBolt.html" title="class in org.apache.storm.starter.bolt">AbstractRankerBolt</a>, <a href="../../../../org/apache/storm/redis/bolt/AbstractRedisBolt.html" title="class in org.apache.storm.redis.bolt">AbstractRedisBolt</a>, <a href="../../../../org/apache/storm/starter/AnchoredWordCount.RandomSentenceSpout.html" title="class in org.apache.storm.starter">AnchoredWordCount.RandomSentenceSpout</a>, <a href="../../../../org/apache/storm/starter/AnchoredWordCount.SplitSentence.html" title="class in org.apache.storm.starter">AnchoredWordCount.SplitSentence</a>, <a href="../../../../org/apache/storm/starter/AnchoredWordCount.WordCount.html" title="class in org.apache.storm.starter">AnchoredWordCount.WordCount</a>, <a href="../../../../org/apache/storm/hdfs/bolt/AvroGenericRecordBolt.html" title="class in org.apache.storm.hdfs.bolt">AvroGenericRecordBolt</a>, <a href="../../../../org/apache/storm/topology/base/BaseBasicBolt.html" title="class in org.apache.storm.topology.base">BaseBasicBolt</a>, <a href="../../../../org/apache/storm/topology/base/BaseBatchBolt.html" title="class in org.apache.storm.topology.base">BaseBatchBolt</a>, <a href="../../../../org/apache/storm/cassandra/bolt/BaseCassandraBolt.html" title="class in org.apache.storm.cassandra.bolt">BaseCassandraBolt</a>, <a href="../../../../org/apache/storm/topology/base/BaseComponent.html" title="class in org.apache.storm.topology.base">BaseComponent</a>, <a href="../../../../org/apache/storm/topology/base/BaseRichBolt.html" title="class in org.apache.storm.topology.base">BaseRichBolt</a>, <a href="../../../../org/apache/storm/topology/base/BaseRichSpout.html" title="class in org.apache.storm.topology.base">BaseRichSpout</a>, <a href="../../../../org/apache/storm/topology/base/BaseStatefulBolt.html" title="class in org.apache.storm.topology.base">BaseStatefulBolt</a>, <a href="../../../../org/apache/storm/topology/BaseStatefulBoltExecutor.html" title="class in org.apache.storm.topology">BaseStatefulBoltExecutor</a>, <a href="../../../../org/apache/storm/topology/base/BaseStatefulWindowedBolt.html" title="class in 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<pre>public interface <span class="typeNameLabel">IComponent</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></pre>
<div class="block"><p>Common methods for all possible components in a topology. This interface is used when defining topologies using the Java API.</p></div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/storm/topology/IComponent.html#declareOutputFields-org.apache.storm.topology.OutputFieldsDeclarer-">declareOutputFields</a></span>(<a href="../../../../org/apache/storm/topology/OutputFieldsDeclarer.html" title="interface in org.apache.storm.topology">OutputFieldsDeclarer</a>&nbsp;declarer)</code>
<div class="block">Declare the output schema for all the streams of this topology.</div>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/storm/topology/IComponent.html#getComponentConfiguration--">getComponentConfiguration</a></span>()</code>
<div class="block">Declare configuration specific to this component.</div>
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<h4>declareOutputFields</h4>
<pre>void&nbsp;declareOutputFields(<a href="../../../../org/apache/storm/topology/OutputFieldsDeclarer.html" title="interface in org.apache.storm.topology">OutputFieldsDeclarer</a>&nbsp;declarer)</pre>
<div class="block"><p>Declare the output schema for all the streams of this topology.</p></div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>declarer</code> - this is used to declare output stream ids, output fields, and whether or not each output stream is a direct stream</dd>
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<h4>getComponentConfiguration</h4>
<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&gt;&nbsp;getComponentConfiguration()</pre>
<div class="block"><p>Declare configuration specific to this component. Only a subset of the &ldquo;topology.*&rdquo; configs can be overridden. The component configuration can be further overridden when constructing the topology using <a href="../../../../org/apache/storm/topology/TopologyBuilder.html" title="class in org.apache.storm.topology"><code>TopologyBuilder</code></a></p></div>
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