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| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.storm.kafka.spout.subscription</a></div> |
| <h1 title="Interface ManualPartitioner" class="title">Interface ManualPartitioner</h1> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>All Superinterfaces:</dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/Serializable.html" title="class or interface in java.io" class="external-link">Serializable</a></code></dd> |
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| <dt>All Known Implementing Classes:</dt> |
| <dd><code><a href="RoundRobinManualPartitioner.html" title="class in org.apache.storm.kafka.spout.subscription">RoundRobinManualPartitioner</a></code></dd> |
| </dl> |
| <dl class="notes"> |
| <dt>Functional Interface:</dt> |
| <dd>This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.</dd> |
| </dl> |
| <hr> |
| <div class="type-signature"><span class="annotations"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/FunctionalInterface.html" title="class or interface in java.lang" class="external-link">@FunctionalInterface</a> |
| </span><span class="modifiers">public interface </span><span class="element-name type-name-label">ManualPartitioner</span><span class="extends-implements"> |
| extends <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/Serializable.html" title="class or interface in java.io" class="external-link">Serializable</a></span></div> |
| <div class="block">A function used to assign partitions to this spout. |
| |
| <p>WARNING if this is not done correctly you can really mess things up, like not reading data in some partitions. |
| The complete TopologyContext is passed in, but it is suggested that you use the index of the spout and the total |
| number of spouts to avoid missing partitions or double assigning partitions.</div> |
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| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Method</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a><org.apache.kafka.common.TopicPartition></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getPartitionsForThisTask(java.util.List,org.apache.storm.task.TopologyContext)" class="member-name-link">getPartitionsForThisTask</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><org.apache.kafka.common.TopicPartition> allPartitionsSorted, |
| <a href="../../../task/TopologyContext.html" title="class in org.apache.storm.task">TopologyContext</a> context)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Filter the list of all partitions handled by this set of spouts to get only the partitions assigned to this task.</div> |
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| <h2>Method Details</h2> |
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| <section class="detail" id="getPartitionsForThisTask(java.util.List,org.apache.storm.task.TopologyContext)"> |
| <h3>getPartitionsForThisTask</h3> |
| <div class="member-signature"><span class="return-type"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a><org.apache.kafka.common.TopicPartition></span> <span class="element-name">getPartitionsForThisTask</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><org.apache.kafka.common.TopicPartition> allPartitionsSorted, |
| <a href="../../../task/TopologyContext.html" title="class in org.apache.storm.task">TopologyContext</a> context)</span></div> |
| <div class="block">Filter the list of all partitions handled by this set of spouts to get only the partitions assigned to this task.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>allPartitionsSorted</code> - all of the partitions that the set of spouts want to subscribe to |
| in a strict ordering that is consistent across tasks</dd> |
| <dd><code>context</code> - the context of the topology</dd> |
| <dt>Returns:</dt> |
| <dd>the subset of the partitions that this spout task should handle.</dd> |
| </dl> |
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