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   <div class="section" id="module-apache_beam.runners.sdf_utils">
 <span id="apache-beam-runners-sdf-utils-module"></span><h1>apache_beam.runners.sdf_utils module<a class="headerlink" href="#module-apache_beam.runners.sdf_utils" title="Permalink to this headline">¶</a></h1>
 <p>Common utility class to help SDK harness to execute an SDF.</p>
 <dl class="class">
 <dt id="apache_beam.runners.sdf_utils.SplitResultPrimary">
 <em class="property">class </em><code class="descclassname">apache_beam.runners.sdf_utils.</code><code class="descname">SplitResultPrimary</code><span class="sig-paren">(</span><em>primary_value</em><span class="sig-paren">)</span><a class="headerlink" href="#apache_beam.runners.sdf_utils.SplitResultPrimary" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#tuple" title="(in Python v3.8)"><code class="xref py py-class docutils literal notranslate"><span class="pre">tuple</span></code></a></p>
 <p>Create new instance of SplitResultPrimary(primary_value,)</p>
 <dl class="attribute">
 <dt id="apache_beam.runners.sdf_utils.SplitResultPrimary.primary_value">
 <code class="descname">primary_value</code><a class="headerlink" href="#apache_beam.runners.sdf_utils.SplitResultPrimary.primary_value" title="Permalink to this definition">¶</a></dt>
 <dd><p>Alias for field number 0</p>
 </dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.runners.sdf_utils.SplitResultResidual">
 <em class="property">class </em><code class="descclassname">apache_beam.runners.sdf_utils.</code><code class="descname">SplitResultResidual</code><span class="sig-paren">(</span><em>residual_value</em>, <em>current_watermark</em>, <em>deferred_timestamp</em><span class="sig-paren">)</span><a class="headerlink" href="#apache_beam.runners.sdf_utils.SplitResultResidual" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#tuple" title="(in Python v3.8)"><code class="xref py py-class docutils literal notranslate"><span class="pre">tuple</span></code></a></p>
 <p>Create new instance of SplitResultResidual(residual_value, current_watermark, deferred_timestamp)</p>
 <dl class="attribute">
 <dt id="apache_beam.runners.sdf_utils.SplitResultResidual.current_watermark">
 <code class="descname">current_watermark</code><a class="headerlink" href="#apache_beam.runners.sdf_utils.SplitResultResidual.current_watermark" title="Permalink to this definition">¶</a></dt>
 <dd><p>Alias for field number 1</p>
 </dd></dl>

 <dl class="attribute">
 <dt id="apache_beam.runners.sdf_utils.SplitResultResidual.deferred_timestamp">
 <code class="descname">deferred_timestamp</code><a class="headerlink" href="#apache_beam.runners.sdf_utils.SplitResultResidual.deferred_timestamp" title="Permalink to this definition">¶</a></dt>
 <dd><p>Alias for field number 2</p>
 </dd></dl>

 <dl class="attribute">
 <dt id="apache_beam.runners.sdf_utils.SplitResultResidual.residual_value">
 <code class="descname">residual_value</code><a class="headerlink" href="#apache_beam.runners.sdf_utils.SplitResultResidual.residual_value" title="Permalink to this definition">¶</a></dt>
 <dd><p>Alias for field number 0</p>
 </dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker">
 <em class="property">class </em><code class="descclassname">apache_beam.runners.sdf_utils.</code><code class="descname">ThreadsafeRestrictionTracker</code><span class="sig-paren">(</span><em>restriction_tracker</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#ThreadsafeRestrictionTracker"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker" 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 v3.8)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p>
 <p>A thread-safe wrapper which wraps a <cite>RestritionTracker</cite>.</p>
 <p>This wrapper guarantees synchronization of modifying restrictions across
 multi-thread.</p>
 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.current_restriction">
 <code class="descname">current_restriction</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#ThreadsafeRestrictionTracker.current_restriction"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.current_restriction" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.try_claim">
 <code class="descname">try_claim</code><span class="sig-paren">(</span><em>position</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#ThreadsafeRestrictionTracker.try_claim"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.try_claim" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.defer_remainder">
 <code class="descname">defer_remainder</code><span class="sig-paren">(</span><em>deferred_time=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#ThreadsafeRestrictionTracker.defer_remainder"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.defer_remainder" title="Permalink to this definition">¶</a></dt>
 <dd><p>Performs self-checkpoint on current processing restriction with an
 expected resuming time.</p>
 <p>Self-checkpoint could happen during processing elements. When executing an
 DoFn.process(), you may want to stop processing an element and resuming
 later if current element has been processed quit a long time or you also
 want to have some outputs from other elements. <code class="docutils literal notranslate"><span class="pre">defer_remainder()</span></code> can be
 called on per element if needed.</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"><strong>deferred_time</strong> – A relative <code class="docutils literal notranslate"><span class="pre">Duration</span></code> that indicates the ideal time gap
 between now and resuming, or an absolute <code class="docutils literal notranslate"><span class="pre">Timestamp</span></code> for resuming
 execution time. If the time_delay is None, the deferred work will be
 executed as soon as possible.</td>
 </tr>
 </tbody>
 </table>
 </dd></dl>

 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.check_done">
 <code class="descname">check_done</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#ThreadsafeRestrictionTracker.check_done"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.check_done" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.current_progress">
 <code class="descname">current_progress</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#ThreadsafeRestrictionTracker.current_progress"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.current_progress" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.try_split">
 <code class="descname">try_split</code><span class="sig-paren">(</span><em>fraction_of_remainder</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#ThreadsafeRestrictionTracker.try_split"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.try_split" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.deferred_status">
 <code class="descname">deferred_status</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#ThreadsafeRestrictionTracker.deferred_status"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.ThreadsafeRestrictionTracker.deferred_status" title="Permalink to this definition">¶</a></dt>
 <dd><p>Returns deferred work which is produced by <code class="docutils literal notranslate"><span class="pre">defer_remainder()</span></code>.</p>
 <p>When there is a self-checkpoint performed, the system needs to fulfill the
 DelayedBundleApplication with deferred_work for a  ProcessBundleResponse.
 The system calls this API to get deferred_residual with watermark together
 to help the runner to schedule a future work.</p>
 <p>Returns: (deferred_residual, time_delay) if having any residual, else None.</p>
 </dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.runners.sdf_utils.RestrictionTrackerView">
 <em class="property">class </em><code class="descclassname">apache_beam.runners.sdf_utils.</code><code class="descname">RestrictionTrackerView</code><span class="sig-paren">(</span><em>threadsafe_restriction_tracker</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#RestrictionTrackerView"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.RestrictionTrackerView" 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 v3.8)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p>
 <p>A DoFn view of thread-safe RestrictionTracker.</p>
 <p>The RestrictionTrackerView wraps a ThreadsafeRestrictionTracker and only
 exposes APIs that will be called by a <code class="docutils literal notranslate"><span class="pre">DoFn.process()</span></code>. During execution
 time, the RestrictionTrackerView will be fed into the <code class="docutils literal notranslate"><span class="pre">DoFn.process</span></code> as a
 restriction_tracker.</p>
 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.RestrictionTrackerView.current_restriction">
 <code class="descname">current_restriction</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#RestrictionTrackerView.current_restriction"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.RestrictionTrackerView.current_restriction" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.RestrictionTrackerView.try_claim">
 <code class="descname">try_claim</code><span class="sig-paren">(</span><em>position</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#RestrictionTrackerView.try_claim"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.RestrictionTrackerView.try_claim" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.RestrictionTrackerView.defer_remainder">
 <code class="descname">defer_remainder</code><span class="sig-paren">(</span><em>deferred_time=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#RestrictionTrackerView.defer_remainder"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.RestrictionTrackerView.defer_remainder" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.runners.sdf_utils.ThreadsafeWatermarkEstimator">
 <em class="property">class </em><code class="descclassname">apache_beam.runners.sdf_utils.</code><code class="descname">ThreadsafeWatermarkEstimator</code><span class="sig-paren">(</span><em>watermark_estimator</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#ThreadsafeWatermarkEstimator"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.ThreadsafeWatermarkEstimator" 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 v3.8)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p>
 <p>A threadsafe wrapper which wraps a WatermarkEstimator with locking
 mechanism to guarantee multi-thread safety.</p>
 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.ThreadsafeWatermarkEstimator.get_estimator_state">
 <code class="descname">get_estimator_state</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#ThreadsafeWatermarkEstimator.get_estimator_state"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.ThreadsafeWatermarkEstimator.get_estimator_state" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.ThreadsafeWatermarkEstimator.current_watermark">
 <code class="descname">current_watermark</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#ThreadsafeWatermarkEstimator.current_watermark"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.ThreadsafeWatermarkEstimator.current_watermark" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.ThreadsafeWatermarkEstimator.observe_timestamp">
 <code class="descname">observe_timestamp</code><span class="sig-paren">(</span><em>timestamp</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#ThreadsafeWatermarkEstimator.observe_timestamp"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.ThreadsafeWatermarkEstimator.observe_timestamp" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 <dl class="class">
 <dt id="apache_beam.runners.sdf_utils.NoOpWatermarkEstimatorProvider">
 <em class="property">class </em><code class="descclassname">apache_beam.runners.sdf_utils.</code><code class="descname">NoOpWatermarkEstimatorProvider</code><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#NoOpWatermarkEstimatorProvider"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.NoOpWatermarkEstimatorProvider" title="Permalink to this definition">¶</a></dt>
 <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.core.html#apache_beam.transforms.core.WatermarkEstimatorProvider" title="apache_beam.transforms.core.WatermarkEstimatorProvider"><code class="xref py py-class docutils literal notranslate"><span class="pre">apache_beam.transforms.core.WatermarkEstimatorProvider</span></code></a></p>
 <p>A WatermarkEstimatorProvider which creates NoOpWatermarkEstimator for the
 framework.</p>
 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.NoOpWatermarkEstimatorProvider.initial_estimator_state">
 <code class="descname">initial_estimator_state</code><span class="sig-paren">(</span><em>element</em>, <em>restriction</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#NoOpWatermarkEstimatorProvider.initial_estimator_state"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.NoOpWatermarkEstimatorProvider.initial_estimator_state" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 <dl class="method">
 <dt id="apache_beam.runners.sdf_utils.NoOpWatermarkEstimatorProvider.create_watermark_estimator">
 <code class="descname">create_watermark_estimator</code><span class="sig-paren">(</span><em>estimator_state</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/sdf_utils.html#NoOpWatermarkEstimatorProvider.create_watermark_estimator"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.sdf_utils.NoOpWatermarkEstimatorProvider.create_watermark_estimator" title="Permalink to this definition">¶</a></dt>
 <dd></dd></dl>

 </dd></dl>

 </div>


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