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| |
| <html> |
| <h2>Side Output</h2> |
| <p> |
| While ParDo always produces a main output PCollection (as the return value from apply), you can |
| also have your ParDo produce any number of additional output PCollections. If you choose to have |
| multiple outputs, your ParDo returns all of the output PCollections (including the main output) |
| bundled together. |
| </p> |
| <p> |
| <b>Kata:</b> Implement additional output to your ParDo for numbers bigger than 100. |
| </p> |
| <br> |
| <div class="hint"> |
| Use <a href="https://beam.apache.org/releases/javadoc/current/org/apache/beam/sdk/transforms/DoFn.MultiOutputReceiver.html"> |
| MultiOutputReceiver</a> and |
| <a href="https://beam.apache.org/releases/javadoc/current/org/apache/beam/sdk/transforms/ParDo.SingleOutput.html#withOutputTags-org.apache.beam.sdk.values.TupleTag-org.apache.beam.sdk.values.TupleTagList-"> |
| .withOutputTags</a> to output multiple tagged-outputs in a |
| <a href="https://beam.apache.org/releases/javadoc/current/org/apache/beam/sdk/transforms/ParDo.html"> |
| ParDo.</a> |
| </div> |
| <div class="hint"> |
| Refer to the Beam Programming Guide |
| <a href="https://beam.apache.org/documentation/programming-guide/#additional-outputs"> |
| "Additional outputs"</a> section for more information. |
| </div> |
| </html> |
