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| <div class="subTitle">org.apache.kudu.client</div> |
| <h2 title="Class KuduPartitioner" class="title">Class KuduPartitioner</h2> |
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| <li>org.apache.kudu.client.KuduPartitioner</li> |
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| <pre>@InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public class <span class="typeNameLabel">KuduPartitioner</span> |
| extends <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></pre> |
| <div class="block">A KuduPartitioner allows clients to determine the target partition of a |
| row without actually performing a write. The set of partitions is eagerly |
| fetched when the KuduPartitioner is constructed so that the actual partitioning |
| step can be performed synchronously without any network trips. |
| |
| NOTE: Because this operates on a metadata snapshot retrieved at construction |
| time, it will not reflect any metadata changes to the table that have occurred |
| since its creation.</div> |
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| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/KuduPartitioner.KuduPartitionerBuilder.html" title="class in org.apache.kudu.client">KuduPartitioner.KuduPartitionerBuilder</a></span></code> |
| <div class="block">A Builder class to build <a href="../../../../org/apache/kudu/client/KuduPartitioner.html" title="class in org.apache.kudu.client"><code>KuduPartitioner</code></a>.</div> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/KuduPartitioner.html#KuduPartitioner-org.apache.kudu.client.PartitionSchema-java.util.Map-">KuduPartitioner</a></span>(org.apache.kudu.client.PartitionSchema partitionSchema, |
| <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><<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>,org.apache.kudu.client.Partition> tabletIdToPartition)</code> </td> |
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| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/KuduPartitioner.html#isCovered-org.apache.kudu.client.PartialRow-">isCovered</a></span>(<a href="../../../../org/apache/kudu/client/PartialRow.html" title="class in org.apache.kudu.client">PartialRow</a> row)</code> |
| <div class="block">Determine if the given row falls into a valid partition.</div> |
| </td> |
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| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/KuduPartitioner.html#numPartitions--">numPartitions</a></span>()</code> </td> |
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| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/KuduPartitioner.html#partitionRow-org.apache.kudu.client.PartialRow-">partitionRow</a></span>(<a href="../../../../org/apache/kudu/client/PartialRow.html" title="class in org.apache.kudu.client">PartialRow</a> row)</code> |
| <div class="block">Determine the partition index that the given row falls into.</div> |
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| <h4>KuduPartitioner</h4> |
| <pre>@InterfaceAudience.Private |
| @InterfaceStability.Unstable |
| public KuduPartitioner(org.apache.kudu.client.PartitionSchema partitionSchema, |
| <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><<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>,org.apache.kudu.client.Partition> tabletIdToPartition)</pre> |
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| <h4>numPartitions</h4> |
| <pre>public int numPartitions()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the number of partitions known by this partitioner.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isCovered-org.apache.kudu.client.PartialRow-"> |
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| <h4>isCovered</h4> |
| <pre>public boolean isCovered(<a href="../../../../org/apache/kudu/client/PartialRow.html" title="class in org.apache.kudu.client">PartialRow</a> row)</pre> |
| <div class="block">Determine if the given row falls into a valid partition. |
| |
| NOTE: The row must be constructed with a schema returned from the Kudu server. |
| ex: `KuduTable.getSchema().newPartialRow();`</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>row</code> - The row to check.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the row falls into a valid partition.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>partitionRow</h4> |
| <pre>public int partitionRow(<a href="../../../../org/apache/kudu/client/PartialRow.html" title="class in org.apache.kudu.client">PartialRow</a> row) |
| throws org.apache.kudu.client.NonCoveredRangeException</pre> |
| <div class="block">Determine the partition index that the given row falls into. |
| |
| NOTE: The row must be constructed with a schema returned from the Kudu server. |
| ex: `KuduTable.getSchema().newPartialRow();`</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>row</code> - The row to be partitioned.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The resulting partition index. |
| The result will be less than numPartitions()</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.apache.kudu.client.NonCoveredRangeException</code> - if the row falls into a non-covered range.</dd> |
| </dl> |
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