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<div class="subTitle">org.apache.storm.kafka.spout.internal</div>
<h2 title="Class OffsetManager" class="title">Class OffsetManager</h2>
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<pre>public class <span class="typeNameLabel">OffsetManager</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"><p>Manages acked and committed offsets for a TopicPartition. This class is not thread safe</p></div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/storm/kafka/spout/internal/OffsetManager.html#OffsetManager-org.apache.kafka.common.TopicPartition-long-">OffsetManager</a></span>(org.apache.kafka.common.TopicPartition&nbsp;tp,
long&nbsp;initialFetchOffset)</code>
<div class="block">Creates a new OffsetManager.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/storm/kafka/spout/internal/OffsetManager.html#addToAckMsgs-org.apache.storm.kafka.spout.KafkaSpoutMessageId-">addToAckMsgs</a></span>(<a href="../../../../../../org/apache/storm/kafka/spout/KafkaSpoutMessageId.html" title="class in org.apache.storm.kafka.spout">KafkaSpoutMessageId</a>&nbsp;msgId)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/storm/kafka/spout/internal/OffsetManager.html#addToEmitMsgs-long-">addToEmitMsgs</a></span>(long&nbsp;offset)</code>&nbsp;</td>
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<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/storm/kafka/spout/internal/OffsetManager.html#commit-org.apache.kafka.clients.consumer.OffsetAndMetadata-">commit</a></span>(org.apache.kafka.clients.consumer.OffsetAndMetadata&nbsp;committedOffsetAndMeta)</code>
<div class="block">Marks an offset as committed.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/storm/kafka/spout/internal/OffsetManager.html#contains-org.apache.storm.kafka.spout.KafkaSpoutMessageId-">contains</a></span>(<a href="../../../../../../org/apache/storm/kafka/spout/KafkaSpoutMessageId.html" title="class in org.apache.storm.kafka.spout">KafkaSpoutMessageId</a>&nbsp;msgId)</code>&nbsp;</td>
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<td class="colFirst"><code>org.apache.kafka.clients.consumer.OffsetAndMetadata</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/storm/kafka/spout/internal/OffsetManager.html#findNextCommitOffset-java.lang.String-">findNextCommitOffset</a></span>(<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>&nbsp;commitMetadata)</code>
<div class="block">An offset can only be committed when all emitted records with lower offset have been acked.</div>
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<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/storm/kafka/spout/internal/OffsetManager.html#getCommittedOffset--">getCommittedOffset</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/storm/kafka/spout/internal/OffsetManager.html#getLatestEmittedOffset--">getLatestEmittedOffset</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/storm/kafka/spout/internal/OffsetManager.html#getNthUncommittedOffsetAfterCommittedOffset-int-">getNthUncommittedOffsetAfterCommittedOffset</a></span>(int&nbsp;index)</code>
<div class="block">Gets the offset of the nth emitted message after the committed offset.</div>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/storm/kafka/spout/internal/OffsetManager.html#getNumUncommittedOffsets--">getNumUncommittedOffsets</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/storm/kafka/spout/internal/OffsetManager.html#hasCommitted--">hasCommitted</a></span>()</code>
<div class="block">Checks if this OffsetManager has committed to Kafka.</div>
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<td class="colFirst"><code><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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/storm/kafka/spout/internal/OffsetManager.html#toString--">toString</a></span>()</code>&nbsp;</td>
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<pre>public&nbsp;OffsetManager(org.apache.kafka.common.TopicPartition&nbsp;tp,
long&nbsp;initialFetchOffset)</pre>
<div class="block"><p>Creates a new OffsetManager.</p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>tp</code> - The TopicPartition</dd>
<dd><code>initialFetchOffset</code> - The initial fetch offset for the given TopicPartition</dd>
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<pre>public&nbsp;void&nbsp;addToAckMsgs(<a href="../../../../../../org/apache/storm/kafka/spout/KafkaSpoutMessageId.html" title="class in org.apache.storm.kafka.spout">KafkaSpoutMessageId</a>&nbsp;msgId)</pre>
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<pre>public&nbsp;void&nbsp;addToEmitMsgs(long&nbsp;offset)</pre>
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<pre>public&nbsp;int&nbsp;getNumUncommittedOffsets()</pre>
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<pre>public&nbsp;long&nbsp;getNthUncommittedOffsetAfterCommittedOffset(int&nbsp;index)</pre>
<div class="block"><p>Gets the offset of the nth emitted message after the committed offset. Example: If the committed offset is 0 and offsets 1, 2, 8, 10 have been emitted, getNthUncommittedOffsetAfterCommittedOffset(3) returns 8.</p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>index</code> - The index of the message to get the offset for</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The offset</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/NoSuchElementException.html?is-external=true" title="class or interface in java.util">NoSuchElementException</a></code> - if the index is out of range</dd>
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<pre>public&nbsp;org.apache.kafka.clients.consumer.OffsetAndMetadata&nbsp;findNextCommitOffset(<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>&nbsp;commitMetadata)</pre>
<div class="block"><p>An offset can only be committed when all emitted records with lower offset have been acked. This guarantees that all offsets smaller than the committedOffset have been delivered, or that those offsets no longer exist in Kafka. <p/> The returned offset points to the earliest uncommitted offset, and matches the semantics of the KafkaConsumer.commitSync API.</p></div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>commitMetadata</code> - Metadata information to commit to Kafka. It is constant per KafkaSpout instance per topology</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the next OffsetAndMetadata to commit, or null if no offset is ready to commit.</dd>
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<h4>commit</h4>
<pre>public&nbsp;long&nbsp;commit(org.apache.kafka.clients.consumer.OffsetAndMetadata&nbsp;committedOffsetAndMeta)</pre>
<div class="block"><p>Marks an offset as committed. This method has side effects - it sets the internal state in such a way that future calls to <a href="../../../../../../org/apache/storm/kafka/spout/internal/OffsetManager.html#findNextCommitOffset-java.lang.String-"><code>findNextCommitOffset(String)</code></a> will return offsets greater than or equal to the offset specified, if any.</p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>committedOffsetAndMeta</code> - The committed offset. All lower offsets are expected to have been committed.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Number of offsets committed in this commit</dd>
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<pre>public&nbsp;boolean&nbsp;hasCommitted()</pre>
<div class="block"><p>Checks if this OffsetManager has committed to Kafka.</p></div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if this OffsetManager has made at least one commit to Kafka, false otherwise</dd>
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<pre>public&nbsp;boolean&nbsp;contains(<a href="../../../../../../org/apache/storm/kafka/spout/KafkaSpoutMessageId.html" title="class in org.apache.storm.kafka.spout">KafkaSpoutMessageId</a>&nbsp;msgId)</pre>
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<pre>public&nbsp;long&nbsp;getLatestEmittedOffset()</pre>
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<pre>public&nbsp;long&nbsp;getCommittedOffset()</pre>
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<pre>public final&nbsp;<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>&nbsp;toString()</pre>
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