| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.beam.runners.spark.structuredstreaming.translation.streaming; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.apache.beam.runners.core.construction.SplittableParDo; |
| import org.apache.beam.runners.spark.structuredstreaming.SparkStructuredStreamingPipelineOptions; |
| import org.apache.beam.runners.spark.structuredstreaming.translation.PipelineTranslator; |
| import org.apache.beam.runners.spark.structuredstreaming.translation.TransformTranslator; |
| import org.apache.beam.runners.spark.structuredstreaming.translation.TranslationContext; |
| import org.apache.beam.sdk.Pipeline; |
| import org.apache.beam.sdk.runners.TransformHierarchy; |
| import org.apache.beam.sdk.transforms.PTransform; |
| import org.checkerframework.checker.nullness.qual.Nullable; |
| |
| /** |
| * {@link PipelineTranslator} for executing a {@link Pipeline} in Spark in streaming mode. This |
| * contains only the components specific to streaming: registry of streaming {@link |
| * TransformTranslator} and registry lookup code. |
| */ |
| @SuppressWarnings({ |
| "rawtypes", // TODO(https://github.com/apache/beam/issues/20447) |
| "nullness" // TODO(https://github.com/apache/beam/issues/20497) |
| }) |
| public class PipelineTranslatorStreaming extends PipelineTranslator { |
| // -------------------------------------------------------------------------------------------- |
| // Transform Translator Registry |
| // -------------------------------------------------------------------------------------------- |
| |
| @SuppressWarnings("rawtypes") |
| private static final Map<Class<? extends PTransform>, TransformTranslator> TRANSFORM_TRANSLATORS = |
| new HashMap<>(); |
| |
| // TODO the ability to have more than one TransformTranslator per URN |
| // that could be dynamically chosen by a predicated that evaluates based on PCollection |
| // obtainable though node.getInputs.getValue() |
| // See |
| // https://github.com/seznam/euphoria/blob/master/euphoria-spark/src/main/java/cz/seznam/euphoria/spark/SparkFlowTranslator.java#L83 |
| // And |
| // https://github.com/seznam/euphoria/blob/master/euphoria-spark/src/main/java/cz/seznam/euphoria/spark/SparkFlowTranslator.java#L106 |
| |
| static { |
| // TRANSFORM_TRANSLATORS.put(Combine.PerKey.class, new CombinePerKeyTranslatorBatch()); |
| // TRANSFORM_TRANSLATORS.put(Combine.Globally.class, new CombineGloballyTranslatorBatch()); |
| // TRANSFORM_TRANSLATORS.put(GroupByKey.class, new GroupByKeyTranslatorBatch()); |
| |
| // TODO: Do we need to have a dedicated translator for {@code Reshuffle} if it's deprecated? |
| // TRANSFORM_TRANSLATORS.put(Reshuffle.class, new ReshuffleTranslatorBatch()); |
| |
| // TRANSFORM_TRANSLATORS.put(Flatten.PCollections.class, new FlattenTranslatorBatch()); |
| // |
| // TRANSFORM_TRANSLATORS.put(Window.Assign.class, new WindowAssignTranslatorBatch()); |
| // |
| // TRANSFORM_TRANSLATORS.put(ParDo.MultiOutput.class, new ParDoTranslatorBatch()); |
| |
| TRANSFORM_TRANSLATORS.put( |
| SplittableParDo.PrimitiveUnboundedRead.class, new ReadSourceTranslatorStreaming()); |
| |
| // TRANSFORM_TRANSLATORS |
| // .put(View.CreatePCollectionView.class, new CreatePCollectionViewTranslatorBatch()); |
| } |
| |
| public PipelineTranslatorStreaming(SparkStructuredStreamingPipelineOptions options) { |
| translationContext = new TranslationContext(options); |
| } |
| |
| /** Returns a translator for the given node, if it is possible, otherwise null. */ |
| @Override |
| protected TransformTranslator<?> getTransformTranslator(TransformHierarchy.Node node) { |
| @Nullable PTransform<?, ?> transform = node.getTransform(); |
| // Root of the graph is null |
| if (transform == null) { |
| return null; |
| } |
| return TRANSFORM_TRANSLATORS.get(transform.getClass()); |
| } |
| } |