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<div class="subTitle">org.apache.gearpump.streaming.kafka.lib.source</div>
<h2 title="Class AbstractKafkaSource" class="title">Class AbstractKafkaSource</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li>org.apache.gearpump.streaming.kafka.lib.source.AbstractKafkaSource</li>
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<dt>All Implemented Interfaces:</dt>
<dd>java.io.Serializable, <a href="../../../../../../../org/apache/gearpump/streaming/source/DataSource.html" title="interface in org.apache.gearpump.streaming.source">DataSource</a>, <a href="../../../../../../../org/apache/gearpump/streaming/transaction/api/TimeReplayableSource.html" title="interface in org.apache.gearpump.streaming.transaction.api">TimeReplayableSource</a></dd>
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<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../../../org/apache/gearpump/streaming/kafka/KafkaSource.html" title="class in org.apache.gearpump.streaming.kafka">KafkaSource</a></dd>
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<pre>public abstract class <span class="typeNameLabel">AbstractKafkaSource</span>
extends java.lang.Object
implements <a href="../../../../../../../org/apache/gearpump/streaming/transaction/api/TimeReplayableSource.html" title="interface in org.apache.gearpump.streaming.transaction.api">TimeReplayableSource</a></pre>
<div class="block">Contains implementation for Kafka source connectors, users should use
<a href="../../../../../../../org/apache/gearpump/streaming/kafka/KafkaSource.html" title="class in org.apache.gearpump.streaming.kafka"><code>KafkaSource</code></a>.
<p>
This is a TimeReplayableSource which is able to replay messages from kafka given a start time.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../../serialized-form.html#org.apache.gearpump.streaming.kafka.lib.source.AbstractKafkaSource">Serialized Form</a></dd>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/gearpump/streaming/kafka/lib/source/AbstractKafkaSource.html#AbstractKafkaSource-java.lang.String-java.util.Properties-">AbstractKafkaSource</a></span>(java.lang.String&nbsp;topic,
java.util.Properties&nbsp;properties)</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/gearpump/streaming/kafka/lib/source/AbstractKafkaSource.html#AbstractKafkaSource-java.lang.String-java.util.Properties-org.apache.gearpump.streaming.kafka.util.KafkaConfig.KafkaConfigFactory-org.apache.gearpump.streaming.kafka.lib.util.KafkaClient.KafkaClientFactory-org.apache.gearpump.streaming.kafka.lib.source.consumer.FetchThread.FetchThreadFactory-">AbstractKafkaSource</a></span>(java.lang.String&nbsp;topic,
java.util.Properties&nbsp;props,
<a href="../../../../../../../org/apache/gearpump/streaming/kafka/util/KafkaConfig.KafkaConfigFactory.html" title="class in org.apache.gearpump.streaming.kafka.util">KafkaConfig.KafkaConfigFactory</a>&nbsp;kafkaConfigFactory,
<a href="../../../../../../../org/apache/gearpump/streaming/kafka/lib/util/KafkaClient.KafkaClientFactory.html" title="class in org.apache.gearpump.streaming.kafka.lib.util">KafkaClient.KafkaClientFactory</a>&nbsp;kafkaClientFactory,
<a href="../../../../../../../org/apache/gearpump/streaming/kafka/lib/source/consumer/FetchThread.FetchThreadFactory.html" title="class in org.apache.gearpump.streaming.kafka.lib.source.consumer">FetchThread.FetchThreadFactory</a>&nbsp;fetchThreadFactory)</code>&nbsp;</td>
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<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/gearpump/streaming/kafka/lib/source/AbstractKafkaSource.html#addCheckpointStore-kafka.common.TopicAndPartition-org.apache.gearpump.streaming.transaction.api.CheckpointStore-">addCheckpointStore</a></span>(kafka.common.TopicAndPartition&nbsp;tp,
<a href="../../../../../../../org/apache/gearpump/streaming/transaction/api/CheckpointStore.html" title="interface in org.apache.gearpump.streaming.transaction.api">CheckpointStore</a>&nbsp;store)</code>&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/gearpump/streaming/kafka/lib/source/AbstractKafkaSource.html#close--">close</a></span>()</code>
<div class="block">Closes connection to data source.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>java.time.Instant</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/gearpump/streaming/kafka/lib/source/AbstractKafkaSource.html#getWatermark--">getWatermark</a></span>()</code>
<div class="block">Returns a watermark such that no timestamp earlier than the watermark should enter the system
Watermark.MAX mark the end of source data</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/gearpump/streaming/kafka/lib/source/AbstractKafkaSource.html#open-org.apache.gearpump.streaming.task.TaskContext-java.time.Instant-">open</a></span>(<a href="../../../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a>&nbsp;context,
java.time.Instant&nbsp;startTime)</code>
<div class="block">Opens connection to data source
invoked in onStart() method of <a href="../../../../../../../org/apache/gearpump/streaming/source/DataSourceTask.html" title="class in org.apache.gearpump.streaming.source"><code>DataSourceTask</code></a></div>
</td>
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<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="../../../../../../../org/apache/gearpump/Message.html" title="interface in org.apache.gearpump">Message</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/gearpump/streaming/kafka/lib/source/AbstractKafkaSource.html#read--">read</a></span>()</code>
<div class="block">Reads a record from incoming queue, decodes, filters and checkpoints offsets
before returns a Message.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/gearpump/streaming/kafka/lib/source/AbstractKafkaSource.html#setCheckpointStore-org.apache.gearpump.streaming.transaction.api.CheckpointStoreFactory-">setCheckpointStore</a></span>(<a href="../../../../../../../org/apache/gearpump/streaming/transaction/api/CheckpointStoreFactory.html" title="interface in org.apache.gearpump.streaming.transaction.api">CheckpointStoreFactory</a>&nbsp;checkpointStoreFactory)</code>
<div class="block">Sets store factory which creates a checkpoint store
at runtime to checkpoint (timestamp, source_offsets)</div>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h3>Constructor Detail</h3>
<a name="AbstractKafkaSource-java.lang.String-java.util.Properties-org.apache.gearpump.streaming.kafka.util.KafkaConfig.KafkaConfigFactory-org.apache.gearpump.streaming.kafka.lib.util.KafkaClient.KafkaClientFactory-org.apache.gearpump.streaming.kafka.lib.source.consumer.FetchThread.FetchThreadFactory-">
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<h4>AbstractKafkaSource</h4>
<pre>public&nbsp;AbstractKafkaSource(java.lang.String&nbsp;topic,
java.util.Properties&nbsp;props,
<a href="../../../../../../../org/apache/gearpump/streaming/kafka/util/KafkaConfig.KafkaConfigFactory.html" title="class in org.apache.gearpump.streaming.kafka.util">KafkaConfig.KafkaConfigFactory</a>&nbsp;kafkaConfigFactory,
<a href="../../../../../../../org/apache/gearpump/streaming/kafka/lib/util/KafkaClient.KafkaClientFactory.html" title="class in org.apache.gearpump.streaming.kafka.lib.util">KafkaClient.KafkaClientFactory</a>&nbsp;kafkaClientFactory,
<a href="../../../../../../../org/apache/gearpump/streaming/kafka/lib/source/consumer/FetchThread.FetchThreadFactory.html" title="class in org.apache.gearpump.streaming.kafka.lib.source.consumer">FetchThread.FetchThreadFactory</a>&nbsp;fetchThreadFactory)</pre>
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<h4>AbstractKafkaSource</h4>
<pre>public&nbsp;AbstractKafkaSource(java.lang.String&nbsp;topic,
java.util.Properties&nbsp;properties)</pre>
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<a name="setCheckpointStore-org.apache.gearpump.streaming.transaction.api.CheckpointStoreFactory-">
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<h4>setCheckpointStore</h4>
<pre>public&nbsp;void&nbsp;setCheckpointStore(<a href="../../../../../../../org/apache/gearpump/streaming/transaction/api/CheckpointStoreFactory.html" title="interface in org.apache.gearpump.streaming.transaction.api">CheckpointStoreFactory</a>&nbsp;checkpointStoreFactory)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/gearpump/streaming/transaction/api/TimeReplayableSource.html#setCheckpointStore-org.apache.gearpump.streaming.transaction.api.CheckpointStoreFactory-">TimeReplayableSource</a></code></span></div>
<div class="block">Sets store factory which creates a checkpoint store
at runtime to checkpoint (timestamp, source_offsets)</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/gearpump/streaming/transaction/api/TimeReplayableSource.html#setCheckpointStore-org.apache.gearpump.streaming.transaction.api.CheckpointStoreFactory-">setCheckpointStore</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/gearpump/streaming/transaction/api/TimeReplayableSource.html" title="interface in org.apache.gearpump.streaming.transaction.api">TimeReplayableSource</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>checkpointStoreFactory</code> - (undocumented)</dd>
</dl>
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<a name="open-org.apache.gearpump.streaming.task.TaskContext-java.time.Instant-">
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<h4>open</h4>
<pre>public&nbsp;void&nbsp;open(<a href="../../../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a>&nbsp;context,
java.time.Instant&nbsp;startTime)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/gearpump/streaming/source/DataSource.html#open-org.apache.gearpump.streaming.task.TaskContext-java.time.Instant-">DataSource</a></code></span></div>
<div class="block">Opens connection to data source
invoked in onStart() method of <a href="../../../../../../../org/apache/gearpump/streaming/source/DataSourceTask.html" title="class in org.apache.gearpump.streaming.source"><code>DataSourceTask</code></a>
<p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/gearpump/streaming/source/DataSource.html#open-org.apache.gearpump.streaming.task.TaskContext-java.time.Instant-">open</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/gearpump/streaming/source/DataSource.html" title="interface in org.apache.gearpump.streaming.source">DataSource</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>context</code> - is the task context at runtime</dd>
<dd><code>startTime</code> - is the start time of system</dd>
</dl>
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<h4>read</h4>
<pre>public&nbsp;<a href="../../../../../../../org/apache/gearpump/Message.html" title="interface in org.apache.gearpump">Message</a>&nbsp;read()</pre>
<div class="block">Reads a record from incoming queue, decodes, filters and checkpoints offsets
before returns a Message. Message can be null if the incoming queue is empty.
<p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/gearpump/streaming/source/DataSource.html#read--">read</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/gearpump/streaming/source/DataSource.html" title="interface in org.apache.gearpump.streaming.source">DataSource</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <a href="../../../../../../../org/apache/gearpump/Message.html" title="interface in org.apache.gearpump"><code>Message</code></a> or null</dd>
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<h4>close</h4>
<pre>public&nbsp;void&nbsp;close()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/gearpump/streaming/source/DataSource.html#close--">DataSource</a></code></span></div>
<div class="block">Closes connection to data source.
invoked in onStop() method of <a href="../../../../../../../org/apache/gearpump/streaming/source/DataSourceTask.html" title="class in org.apache.gearpump.streaming.source"><code>DataSourceTask</code></a></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/gearpump/streaming/source/DataSource.html#close--">close</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/gearpump/streaming/source/DataSource.html" title="interface in org.apache.gearpump.streaming.source">DataSource</a></code></dd>
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<h4>getWatermark</h4>
<pre>public&nbsp;java.time.Instant&nbsp;getWatermark()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../../org/apache/gearpump/streaming/source/DataSource.html#getWatermark--">DataSource</a></code></span></div>
<div class="block">Returns a watermark such that no timestamp earlier than the watermark should enter the system
Watermark.MAX mark the end of source data</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/gearpump/streaming/source/DataSource.html#getWatermark--">getWatermark</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../../org/apache/gearpump/streaming/source/DataSource.html" title="interface in org.apache.gearpump.streaming.source">DataSource</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>(undocumented)</dd>
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<h4>addCheckpointStore</h4>
<pre>protected&nbsp;void&nbsp;addCheckpointStore(kafka.common.TopicAndPartition&nbsp;tp,
<a href="../../../../../../../org/apache/gearpump/streaming/transaction/api/CheckpointStore.html" title="interface in org.apache.gearpump.streaming.transaction.api">CheckpointStore</a>&nbsp;store)</pre>
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