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| <div class="section" id="module-apache_beam.io.kinesis"> |
| <span id="apache-beam-io-kinesis-module"></span><h1>apache_beam.io.kinesis module<a class="headerlink" href="#module-apache_beam.io.kinesis" title="Permalink to this headline">¶</a></h1> |
| <p>PTransforms for supporting Kinesis streaming in Python pipelines.</p> |
| <p>These transforms are currently supported by Beam Flink and Spark portable |
| runners.</p> |
| <p><strong>Setup</strong></p> |
| <p>Transforms provided in this module are cross-language transforms |
| implemented in the Beam Java SDK. During the pipeline construction, Python SDK |
| will connect to a Java expansion service to expand these transforms. |
| To facilitate this, a small amount of setup is needed before using these |
| transforms in a Beam Python pipeline.</p> |
| <p>There are several ways to setup cross-language Kinesis transforms.</p> |
| <ul class="simple"> |
| <li>Option 1: use the default expansion service</li> |
| <li>Option 2: specify a custom expansion service</li> |
| </ul> |
| <p>See below for details regarding each of these options.</p> |
| <p><em>Option 1: Use the default expansion service</em></p> |
| <p>This is the recommended and easiest setup option for using Python Kinesis |
| transforms. This option is only available for Beam 2.25.0 and later.</p> |
| <p>This option requires following pre-requisites before running the Beam |
| pipeline.</p> |
| <ul class="simple"> |
| <li>Install Java runtime in the computer from where the pipeline is constructed |
| and make sure that ‘java’ command is available.</li> |
| </ul> |
| <p>In this option, Python SDK will either download (for released Beam version) or |
| build (when running from a Beam Git clone) a expansion service jar and use |
| that to expand transforms. Currently Kinesis transforms use the |
| ‘beam-sdks-java-io-kinesis-expansion-service’ jar for this purpose.</p> |
| <p><em>Option 2: specify a custom expansion service</em></p> |
| <p>In this option, you startup your own expansion service and provide that as |
| a parameter when using the transforms provided in this module.</p> |
| <p>This option requires following pre-requisites before running the Beam |
| pipeline.</p> |
| <ul class="simple"> |
| <li>Startup your own expansion service.</li> |
| <li>Update your pipeline to provide the expansion service address when |
| initiating Kinesis transforms provided in this module.</li> |
| </ul> |
| <p>Flink Users can use the built-in Expansion Service of the Flink Runner’s |
| Job Server. If you start Flink’s Job Server, the expansion service will be |
| started on port 8097. For a different address, please set the |
| expansion_service parameter.</p> |
| <p><strong>More information</strong></p> |
| <p>For more information regarding cross-language transforms see: |
| - <a class="reference external" href="https://beam.apache.org/roadmap/portability/">https://beam.apache.org/roadmap/portability/</a></p> |
| <p>For more information specific to Flink runner see: |
| - <a class="reference external" href="https://beam.apache.org/documentation/runners/flink/">https://beam.apache.org/documentation/runners/flink/</a></p> |
| <dl class="class"> |
| <dt id="apache_beam.io.kinesis.WriteToKinesis"> |
| <em class="property">class </em><code class="descclassname">apache_beam.io.kinesis.</code><code class="descname">WriteToKinesis</code><span class="sig-paren">(</span><em>stream_name</em>, <em>aws_access_key</em>, <em>aws_secret_key</em>, <em>region</em>, <em>partition_key</em>, <em>service_endpoint=None</em>, <em>verify_certificate=None</em>, <em>producer_properties=None</em>, <em>expansion_service=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/kinesis.html#WriteToKinesis"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.kinesis.WriteToKinesis" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.external.html#apache_beam.transforms.external.ExternalTransform" title="apache_beam.transforms.external.ExternalTransform"><code class="xref py py-class docutils literal notranslate"><span class="pre">apache_beam.transforms.external.ExternalTransform</span></code></a></p> |
| <p>An external PTransform which writes byte array stream to Amazon Kinesis.</p> |
| <p>Experimental; no backwards compatibility guarantees.</p> |
| <p>Initializes a write operation to Kinesis.</p> |
| <table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple"> |
| <li><strong>stream_name</strong> – Kinesis stream name.</li> |
| <li><strong>aws_access_key</strong> – Kinesis access key.</li> |
| <li><strong>aws_secret_key</strong> – Kinesis access key secret.</li> |
| <li><strong>region</strong> – AWS region. Example: ‘us-east-1’.</li> |
| <li><strong>service_endpoint</strong> – Kinesis service endpoint</li> |
| <li><strong>verify_certificate</strong> – Enable or disable certificate verification. |
| Never set to False on production. True by default.</li> |
| <li><strong>partition_key</strong> – Specify default partition key.</li> |
| <li><strong>producer_properties</strong> – Specify the configuration properties for Kinesis |
| Producer Library (KPL) as dictionary. |
| Example: {‘CollectionMaxCount’: ‘1000’, ‘ConnectTimeout’: ‘10000’}</li> |
| <li><strong>expansion_service</strong> – The address (host:port) of the ExpansionService.</li> |
| </ul> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <dl class="attribute"> |
| <dt id="apache_beam.io.kinesis.WriteToKinesis.URN"> |
| <code class="descname">URN</code><em class="property"> = 'beam:transform:org.apache.beam:kinesis_write:v1'</em><a class="headerlink" href="#apache_beam.io.kinesis.WriteToKinesis.URN" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="class"> |
| <dt id="apache_beam.io.kinesis.ReadDataFromKinesis"> |
| <em class="property">class </em><code class="descclassname">apache_beam.io.kinesis.</code><code class="descname">ReadDataFromKinesis</code><span class="sig-paren">(</span><em>stream_name</em>, <em>aws_access_key</em>, <em>aws_secret_key</em>, <em>region</em>, <em>service_endpoint=None</em>, <em>verify_certificate=None</em>, <em>max_num_records=None</em>, <em>max_read_time=None</em>, <em>initial_position_in_stream=None</em>, <em>initial_timestamp_in_stream=None</em>, <em>request_records_limit=None</em>, <em>up_to_date_threshold=None</em>, <em>max_capacity_per_shard=None</em>, <em>watermark_policy=None</em>, <em>watermark_idle_duration_threshold=None</em>, <em>rate_limit=None</em>, <em>expansion_service=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/kinesis.html#ReadDataFromKinesis"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.kinesis.ReadDataFromKinesis" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.external.html#apache_beam.transforms.external.ExternalTransform" title="apache_beam.transforms.external.ExternalTransform"><code class="xref py py-class docutils literal notranslate"><span class="pre">apache_beam.transforms.external.ExternalTransform</span></code></a></p> |
| <p>An external PTransform which reads byte array stream from Amazon Kinesis.</p> |
| <p>Experimental; no backwards compatibility guarantees.</p> |
| <p>Initializes a read operation from Kinesis.</p> |
| <table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple"> |
| <li><strong>stream_name</strong> – Kinesis stream name.</li> |
| <li><strong>aws_access_key</strong> – Kinesis access key.</li> |
| <li><strong>aws_secret_key</strong> – Kinesis access key secret.</li> |
| <li><strong>region</strong> – AWS region. Example: ‘us-east-1’.</li> |
| <li><strong>service_endpoint</strong> – Kinesis service endpoint</li> |
| <li><strong>verify_certificate</strong> – Enable or disable certificate verification. |
| Never set to False on production. True by default.</li> |
| <li><strong>max_num_records</strong> – Specifies to read at most a given number of records. |
| Must be greater than 0.</li> |
| <li><strong>max_read_time</strong> – Specifies to read records during x milliseconds.</li> |
| <li><strong>initial_timestamp_in_stream</strong> – Specify reading beginning at the given |
| timestamp in milliseconds. Must be in the past.</li> |
| <li><strong>initial_position_in_stream</strong> – Specify reading from some initial |
| position in stream. Possible values: |
| LATEST - Start after the most recent data record (fetch new data). |
| TRIM_HORIZON - Start from the oldest available data record. |
| AT_TIMESTAMP - Start from the record at or after the specified |
| server-side timestamp.</li> |
| <li><strong>request_records_limit</strong> – Specifies the maximum number of records in |
| GetRecordsResult returned by GetRecords call which is limited by 10K |
| records. If should be adjusted according to average size of data record |
| to prevent shard overloading. More at: |
| docs.aws.amazon.com/kinesis/latest/APIReference/API_GetRecords.html</li> |
| <li><strong>up_to_date_threshold</strong> – Specifies how late in milliseconds records |
| consumed by this source can be to still be considered on time. Defaults |
| to zero.</li> |
| <li><strong>max_capacity_per_shard</strong> – Specifies the maximum number of messages per |
| one shard. Defaults to 10’000.</li> |
| <li><strong>watermark_policy</strong> – Specifies the watermark policy. Possible values: |
| PROCESSING_TYPE, ARRIVAL_TIME. Defaults to ARRIVAL_TIME.</li> |
| <li><strong>watermark_idle_duration_threshold</strong> – Use only when watermark policy is |
| ARRIVAL_TIME. Denotes the duration for which the watermark can be idle. |
| Passed in milliseconds.</li> |
| <li><strong>rate_limit</strong> – Sets fixed rate policy for given milliseconds value. By |
| default there is no rate limit.</li> |
| <li><strong>expansion_service</strong> – The address (host:port) of the ExpansionService.</li> |
| </ul> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <dl class="attribute"> |
| <dt id="apache_beam.io.kinesis.ReadDataFromKinesis.URN"> |
| <code class="descname">URN</code><em class="property"> = 'beam:transform:org.apache.beam:kinesis_read:v1'</em><a class="headerlink" href="#apache_beam.io.kinesis.ReadDataFromKinesis.URN" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="class"> |
| <dt id="apache_beam.io.kinesis.InitialPositionInStream"> |
| <em class="property">class </em><code class="descclassname">apache_beam.io.kinesis.</code><code class="descname">InitialPositionInStream</code><a class="reference internal" href="_modules/apache_beam/io/kinesis.html#InitialPositionInStream"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.kinesis.InitialPositionInStream" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p> |
| <dl class="attribute"> |
| <dt id="apache_beam.io.kinesis.InitialPositionInStream.LATEST"> |
| <code class="descname">LATEST</code><em class="property"> = 'LATEST'</em><a class="headerlink" href="#apache_beam.io.kinesis.InitialPositionInStream.LATEST" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="apache_beam.io.kinesis.InitialPositionInStream.TRIM_HORIZON"> |
| <code class="descname">TRIM_HORIZON</code><em class="property"> = 'TRIM_HORIZON'</em><a class="headerlink" href="#apache_beam.io.kinesis.InitialPositionInStream.TRIM_HORIZON" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="apache_beam.io.kinesis.InitialPositionInStream.AT_TIMESTAMP"> |
| <code class="descname">AT_TIMESTAMP</code><em class="property"> = 'AT_TIMESTAMP'</em><a class="headerlink" href="#apache_beam.io.kinesis.InitialPositionInStream.AT_TIMESTAMP" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="staticmethod"> |
| <dt id="apache_beam.io.kinesis.InitialPositionInStream.validate_param"> |
| <em class="property">static </em><code class="descname">validate_param</code><span class="sig-paren">(</span><em>param</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/kinesis.html#InitialPositionInStream.validate_param"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.kinesis.InitialPositionInStream.validate_param" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="class"> |
| <dt id="apache_beam.io.kinesis.WatermarkPolicy"> |
| <em class="property">class </em><code class="descclassname">apache_beam.io.kinesis.</code><code class="descname">WatermarkPolicy</code><a class="reference internal" href="_modules/apache_beam/io/kinesis.html#WatermarkPolicy"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.kinesis.WatermarkPolicy" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.10)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p> |
| <dl class="attribute"> |
| <dt id="apache_beam.io.kinesis.WatermarkPolicy.PROCESSING_TYPE"> |
| <code class="descname">PROCESSING_TYPE</code><em class="property"> = 'PROCESSING_TYPE'</em><a class="headerlink" href="#apache_beam.io.kinesis.WatermarkPolicy.PROCESSING_TYPE" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="apache_beam.io.kinesis.WatermarkPolicy.ARRIVAL_TIME"> |
| <code class="descname">ARRIVAL_TIME</code><em class="property"> = 'ARRIVAL_TIME'</em><a class="headerlink" href="#apache_beam.io.kinesis.WatermarkPolicy.ARRIVAL_TIME" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="staticmethod"> |
| <dt id="apache_beam.io.kinesis.WatermarkPolicy.validate_param"> |
| <em class="property">static </em><code class="descname">validate_param</code><span class="sig-paren">(</span><em>param</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/io/kinesis.html#WatermarkPolicy.validate_param"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.io.kinesis.WatermarkPolicy.validate_param" title="Permalink to this definition">¶</a></dt> |
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