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| <div class="subTitle">org.apache.beam.sdk.io.gcp.bigtable.changestreams.action</div> |
| <h2 title="Class DetectNewPartitionsAction" class="title">Class DetectNewPartitionsAction</h2> |
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| <pre><a href="../../../../../../../../../org/apache/beam/sdk/annotations/Internal.html" title="annotation in org.apache.beam.sdk.annotations">@Internal</a> |
| public class <span class="typeNameLabel">DetectNewPartitionsAction</span> |
| extends java.lang.Object</pre> |
| <div class="block">This class processes <a href="../../../../../../../../../org/apache/beam/sdk/io/gcp/bigtable/changestreams/dofn/DetectNewPartitionsDoFn.html" title="class in org.apache.beam.sdk.io.gcp.bigtable.changestreams.dofn"><code>DetectNewPartitionsDoFn</code></a>.</div> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/beam/sdk/io/gcp/bigtable/changestreams/action/DetectNewPartitionsAction.html#DetectNewPartitionsAction-org.apache.beam.sdk.io.gcp.bigtable.changestreams.ChangeStreamMetrics-org.apache.beam.sdk.io.gcp.bigtable.changestreams.dao.MetadataTableDao-org.apache.beam.sdk.io.gcp.bigtable.changestreams.action.GenerateInitialPartitionsAction-">DetectNewPartitionsAction</a></span>(<a href="../../../../../../../../../org/apache/beam/sdk/io/gcp/bigtable/changestreams/ChangeStreamMetrics.html" title="class in org.apache.beam.sdk.io.gcp.bigtable.changestreams">ChangeStreamMetrics</a> metrics, |
| <a href="../../../../../../../../../org/apache/beam/sdk/io/gcp/bigtable/changestreams/dao/MetadataTableDao.html" title="class in org.apache.beam.sdk.io.gcp.bigtable.changestreams.dao">MetadataTableDao</a> metadataTableDao, |
| <a href="../../../../../../../../../org/apache/beam/sdk/io/gcp/bigtable/changestreams/action/GenerateInitialPartitionsAction.html" title="class in org.apache.beam.sdk.io.gcp.bigtable.changestreams.action">GenerateInitialPartitionsAction</a> generateInitialPartitionsAction)</code> </td> |
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| <td class="colFirst"><code><a href="../../../../../../../../../org/apache/beam/sdk/transforms/DoFn.ProcessContinuation.html" title="class in org.apache.beam.sdk.transforms">DoFn.ProcessContinuation</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/beam/sdk/io/gcp/bigtable/changestreams/action/DetectNewPartitionsAction.html#run-org.apache.beam.sdk.transforms.splittabledofn.RestrictionTracker-org.apache.beam.sdk.transforms.DoFn.OutputReceiver-org.apache.beam.sdk.transforms.splittabledofn.ManualWatermarkEstimator-org.apache.beam.sdk.transforms.DoFn.BundleFinalizer-org.joda.time.Instant-">run</a></span>(<a href="../../../../../../../../../org/apache/beam/sdk/transforms/splittabledofn/RestrictionTracker.html" title="class in org.apache.beam.sdk.transforms.splittabledofn">RestrictionTracker</a><<a href="../../../../../../../../../org/apache/beam/sdk/io/range/OffsetRange.html" title="class in org.apache.beam.sdk.io.range">OffsetRange</a>,java.lang.Long> tracker, |
| <a href="../../../../../../../../../org/apache/beam/sdk/transforms/DoFn.OutputReceiver.html" title="interface in org.apache.beam.sdk.transforms">DoFn.OutputReceiver</a><<a href="../../../../../../../../../org/apache/beam/sdk/io/gcp/bigtable/changestreams/model/PartitionRecord.html" title="class in org.apache.beam.sdk.io.gcp.bigtable.changestreams.model">PartitionRecord</a>> receiver, |
| <a href="../../../../../../../../../org/apache/beam/sdk/transforms/splittabledofn/ManualWatermarkEstimator.html" title="interface in org.apache.beam.sdk.transforms.splittabledofn">ManualWatermarkEstimator</a><<a href="https://static.javadoc.io/joda-time/joda-time/2.10.10/org/joda/time/Instant.html?is-external=true" title="class or interface in org.joda.time">Instant</a>> watermarkEstimator, |
| <a href="../../../../../../../../../org/apache/beam/sdk/transforms/DoFn.BundleFinalizer.html" title="interface in org.apache.beam.sdk.transforms">DoFn.BundleFinalizer</a> bundleFinalizer, |
| <a href="https://static.javadoc.io/joda-time/joda-time/2.10.10/org/joda/time/Instant.html?is-external=true" title="class or interface in org.joda.time">Instant</a> startTime)</code> |
| <div class="block">Perform the necessary steps to manage initial set of partitions and new partitions.</div> |
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| <a name="DetectNewPartitionsAction-org.apache.beam.sdk.io.gcp.bigtable.changestreams.ChangeStreamMetrics-org.apache.beam.sdk.io.gcp.bigtable.changestreams.dao.MetadataTableDao-org.apache.beam.sdk.io.gcp.bigtable.changestreams.action.GenerateInitialPartitionsAction-"> |
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| <h4>DetectNewPartitionsAction</h4> |
| <pre>public DetectNewPartitionsAction(<a href="../../../../../../../../../org/apache/beam/sdk/io/gcp/bigtable/changestreams/ChangeStreamMetrics.html" title="class in org.apache.beam.sdk.io.gcp.bigtable.changestreams">ChangeStreamMetrics</a> metrics, |
| <a href="../../../../../../../../../org/apache/beam/sdk/io/gcp/bigtable/changestreams/dao/MetadataTableDao.html" title="class in org.apache.beam.sdk.io.gcp.bigtable.changestreams.dao">MetadataTableDao</a> metadataTableDao, |
| <a href="../../../../../../../../../org/apache/beam/sdk/io/gcp/bigtable/changestreams/action/GenerateInitialPartitionsAction.html" title="class in org.apache.beam.sdk.io.gcp.bigtable.changestreams.action">GenerateInitialPartitionsAction</a> generateInitialPartitionsAction)</pre> |
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| <a name="run-org.apache.beam.sdk.transforms.splittabledofn.RestrictionTracker-org.apache.beam.sdk.transforms.DoFn.OutputReceiver-org.apache.beam.sdk.transforms.splittabledofn.ManualWatermarkEstimator-org.apache.beam.sdk.transforms.DoFn.BundleFinalizer-org.joda.time.Instant-"> |
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| <h4>run</h4> |
| <pre>public <a href="../../../../../../../../../org/apache/beam/sdk/transforms/DoFn.ProcessContinuation.html" title="class in org.apache.beam.sdk.transforms">DoFn.ProcessContinuation</a> run(<a href="../../../../../../../../../org/apache/beam/sdk/transforms/splittabledofn/RestrictionTracker.html" title="class in org.apache.beam.sdk.transforms.splittabledofn">RestrictionTracker</a><<a href="../../../../../../../../../org/apache/beam/sdk/io/range/OffsetRange.html" title="class in org.apache.beam.sdk.io.range">OffsetRange</a>,java.lang.Long> tracker, |
| <a href="../../../../../../../../../org/apache/beam/sdk/transforms/DoFn.OutputReceiver.html" title="interface in org.apache.beam.sdk.transforms">DoFn.OutputReceiver</a><<a href="../../../../../../../../../org/apache/beam/sdk/io/gcp/bigtable/changestreams/model/PartitionRecord.html" title="class in org.apache.beam.sdk.io.gcp.bigtable.changestreams.model">PartitionRecord</a>> receiver, |
| <a href="../../../../../../../../../org/apache/beam/sdk/transforms/splittabledofn/ManualWatermarkEstimator.html" title="interface in org.apache.beam.sdk.transforms.splittabledofn">ManualWatermarkEstimator</a><<a href="https://static.javadoc.io/joda-time/joda-time/2.10.10/org/joda/time/Instant.html?is-external=true" title="class or interface in org.joda.time">Instant</a>> watermarkEstimator, |
| <a href="../../../../../../../../../org/apache/beam/sdk/transforms/DoFn.BundleFinalizer.html" title="interface in org.apache.beam.sdk.transforms">DoFn.BundleFinalizer</a> bundleFinalizer, |
| <a href="https://static.javadoc.io/joda-time/joda-time/2.10.10/org/joda/time/Instant.html?is-external=true" title="class or interface in org.joda.time">Instant</a> startTime) |
| throws java.lang.Exception</pre> |
| <div class="block">Perform the necessary steps to manage initial set of partitions and new partitions. Currently, |
| we set to process new partitions every second. |
| |
| <ol> |
| <li>Look up the initial list of partitions to stream if it's the very first run. |
| <li>On rest of the runs, try advancing watermark if needed. |
| <li>Update the metadata table with info about this DoFn. |
| <li>Process new partitions and output them. |
| <li>Reconcile any Partitions that haven't been streaming for a long time |
| <li>Register callback to clean up processed partitions after bundle has been finalized. |
| </ol></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>tracker</code> - offset tracker that simply increment by 1 every single run</dd> |
| <dd><code>receiver</code> - output new partitions</dd> |
| <dd><code>watermarkEstimator</code> - update watermark that is a representation of the low watermark of the |
| entire beam pipeline</dd> |
| <dd><code>bundleFinalizer</code> - perform after bundle output actions to clean up metadata table</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><a href="../../../../../../../../../org/apache/beam/sdk/transforms/DoFn.ProcessContinuation.html#resume--"><code>DoFn.ProcessContinuation.resume()</code></a> with 1-second delay if the stream continues, |
| otherwise <a href="../../../../../../../../../org/apache/beam/sdk/transforms/DoFn.ProcessContinuation.html#stop--"><code>DoFn.ProcessContinuation.stop()</code></a></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>com.google.protobuf.InvalidProtocolBufferException</code> - if failing to process new partitions</dd> |
| <dd><code>java.lang.Exception</code></dd> |
| </dl> |
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