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| <div class="section" id="module-apache_beam.runners.interactive.caching.streaming_cache"> |
| <span id="apache-beam-runners-interactive-caching-streaming-cache-module"></span><h1>apache_beam.runners.interactive.caching.streaming_cache module<a class="headerlink" href="#module-apache_beam.runners.interactive.caching.streaming_cache" title="Permalink to this headline">¶</a></h1> |
| <dl class="class"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCacheSink"> |
| <em class="property">class </em><code class="descclassname">apache_beam.runners.interactive.caching.streaming_cache.</code><code class="descname">StreamingCacheSink</code><span class="sig-paren">(</span><em>cache_dir</em>, <em>filename</em>, <em>sample_resolution_sec</em>, <em>coder=SafeFastPrimitivesCoder</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCacheSink"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCacheSink" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference internal" href="apache_beam.transforms.ptransform.html#apache_beam.transforms.ptransform.PTransform" title="apache_beam.transforms.ptransform.PTransform"><code class="xref py py-class docutils literal notranslate"><span class="pre">apache_beam.transforms.ptransform.PTransform</span></code></a></p> |
| <p>A PTransform that writes TestStreamFile(Header|Records)s to file.</p> |
| <p>This transform takes in an arbitrary element stream and writes the list of |
| TestStream events (as TestStreamFileRecords) to file. When replayed, this |
| will produce the best-effort replay of the original job (e.g. some elements |
| may be produced slightly out of order from the original stream).</p> |
| <p>Note that this PTransform is assumed to be only run on a single machine where |
| the following assumptions are correct: elements come in ordered, no two |
| transforms are writing to the same file. This PTransform is assumed to only |
| run correctly with the DirectRunner.</p> |
| <p>TODO(BEAM-9447): Generalize this to more source/sink types aside from file |
| based. Also, generalize to cases where there might be multiple workers |
| writing to the same sink.</p> |
| <dl class="attribute"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCacheSink.path"> |
| <code class="descname">path</code><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCacheSink.path" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Returns the path the sink leads to.</p> |
| </dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCacheSink.size_in_bytes"> |
| <code class="descname">size_in_bytes</code><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCacheSink.size_in_bytes" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Returns the space usage in bytes of the sink.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCacheSink.expand"> |
| <code class="descname">expand</code><span class="sig-paren">(</span><em>pcoll</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCacheSink.expand"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCacheSink.expand" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="class"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCacheSource"> |
| <em class="property">class </em><code class="descclassname">apache_beam.runners.interactive.caching.streaming_cache.</code><code class="descname">StreamingCacheSource</code><span class="sig-paren">(</span><em>cache_dir</em>, <em>labels</em>, <em>is_cache_complete=None</em>, <em>coder=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCacheSource"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCacheSource" 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> |
| <p>A class that reads and parses TestStreamFile(Header|Reader)s.</p> |
| <p>This source operates in the following way:</p> |
| <blockquote> |
| <div><ol class="arabic simple"> |
| <li>Wait for up to <cite>timeout_secs</cite> for the file to be available.</li> |
| <li>Read, parse, and emit the entire contents of the file</li> |
| <li>Wait for more events to come or until <cite>is_cache_complete</cite> returns True</li> |
| <li>If there are more events, then go to 2</li> |
| <li>Otherwise, stop emitting.</li> |
| </ol> |
| </div></blockquote> |
| <p>This class is used to read from file and send its to the TestStream via the |
| StreamingCacheManager.Reader.</p> |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCacheSource.read"> |
| <code class="descname">read</code><span class="sig-paren">(</span><em>tail</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCacheSource.read"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCacheSource.read" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Reads all TestStreamFile(Header|TestStreamFileRecord)s from file.</p> |
| <p>This returns a generator to be able to read all lines from the given file. |
| If <cite>tail</cite> is True, then it will wait until the cache is complete to exit. |
| Otherwise, it will read the file only once.</p> |
| </dd></dl> |
| |
| </dd></dl> |
| |
| <dl class="class"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache"> |
| <em class="property">class </em><code class="descclassname">apache_beam.runners.interactive.caching.streaming_cache.</code><code class="descname">StreamingCache</code><span class="sig-paren">(</span><em>cache_dir</em>, <em>is_cache_complete=None</em>, <em>sample_resolution_sec=0.1</em>, <em>saved_pcoders=None</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Bases: <a class="reference internal" href="apache_beam.runners.interactive.cache_manager.html#apache_beam.runners.interactive.cache_manager.CacheManager" title="apache_beam.runners.interactive.cache_manager.CacheManager"><code class="xref py py-class docutils literal notranslate"><span class="pre">apache_beam.runners.interactive.cache_manager.CacheManager</span></code></a></p> |
| <p>Abstraction that holds the logic for reading and writing to cache.</p> |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.size"> |
| <code class="descname">size</code><span class="sig-paren">(</span><em>*labels</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache.size"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.size" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.capture_size"> |
| <code class="descname">capture_size</code><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.capture_size" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.capture_paths"> |
| <code class="descname">capture_paths</code><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.capture_paths" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="attribute"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.capture_keys"> |
| <code class="descname">capture_keys</code><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.capture_keys" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.exists"> |
| <code class="descname">exists</code><span class="sig-paren">(</span><em>*labels</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache.exists"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.exists" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.read"> |
| <code class="descname">read</code><span class="sig-paren">(</span><em>*labels</em>, <em>**args</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache.read"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.read" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Returns a generator to read all records from file.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.read_multiple"> |
| <code class="descname">read_multiple</code><span class="sig-paren">(</span><em>labels</em>, <em>tail=True</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache.read_multiple"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.read_multiple" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Returns a generator to read all records from file.</p> |
| <p>Does tail until the cache is complete. This is because it is used in the |
| TestStreamServiceController to read from file which is only used during |
| pipeline runtime which needs to block.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.write"> |
| <code class="descname">write</code><span class="sig-paren">(</span><em>values</em>, <em>*labels</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache.write"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.write" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Writes the given values to cache.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.clear"> |
| <code class="descname">clear</code><span class="sig-paren">(</span><em>*labels</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache.clear"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.clear" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.source"> |
| <code class="descname">source</code><span class="sig-paren">(</span><em>*labels</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache.source"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.source" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Returns the StreamingCacheManager source.</p> |
| <p>This is beam.Impulse() because unbounded sources will be marked with this |
| and then the PipelineInstrument will replace these with a TestStream.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.sink"> |
| <code class="descname">sink</code><span class="sig-paren">(</span><em>labels</em>, <em>is_capture=False</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache.sink"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.sink" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Returns a StreamingCacheSink to write elements to file.</p> |
| <p>Note that this is assumed to only work in the DirectRunner as the underlying |
| StreamingCacheSink assumes a single machine to have correct element |
| ordering.</p> |
| </dd></dl> |
| |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.save_pcoder"> |
| <code class="descname">save_pcoder</code><span class="sig-paren">(</span><em>pcoder</em>, <em>*labels</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache.save_pcoder"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.save_pcoder" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.load_pcoder"> |
| <code class="descname">load_pcoder</code><span class="sig-paren">(</span><em>*labels</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache.load_pcoder"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.load_pcoder" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.cleanup"> |
| <code class="descname">cleanup</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache.cleanup"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.cleanup" title="Permalink to this definition">¶</a></dt> |
| <dd></dd></dl> |
| |
| <dl class="class"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.Reader"> |
| <em class="property">class </em><code class="descname">Reader</code><span class="sig-paren">(</span><em>headers</em>, <em>readers</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache.Reader"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.Reader" 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> |
| <p>Abstraction that reads from PCollection readers.</p> |
| <p>This class is an Abstraction layer over multiple PCollection readers to be |
| used for supplying a TestStream service with events.</p> |
| <p>This class is also responsible for holding the state of the clock, injecting |
| clock advancement events, and watermark advancement events.</p> |
| <dl class="method"> |
| <dt id="apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.Reader.read"> |
| <code class="descname">read</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/runners/interactive/caching/streaming_cache.html#StreamingCache.Reader.read"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#apache_beam.runners.interactive.caching.streaming_cache.StreamingCache.Reader.read" title="Permalink to this definition">¶</a></dt> |
| <dd><p>Reads records from PCollection readers.</p> |
| </dd></dl> |
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