| /* |
| * 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.core.construction; |
| |
| import static org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Preconditions.checkArgument; |
| |
| import com.google.auto.service.AutoService; |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.Map; |
| import org.apache.beam.model.pipeline.v1.RunnerApi; |
| import org.apache.beam.model.pipeline.v1.RunnerApi.FunctionSpec; |
| import org.apache.beam.runners.core.construction.PTransformTranslation.TransformPayloadTranslator; |
| import org.apache.beam.sdk.runners.AppliedPTransform; |
| import org.apache.beam.sdk.transforms.PTransform; |
| import org.apache.beam.sdk.transforms.ParDo; |
| import org.apache.beam.sdk.transforms.View; |
| import org.apache.beam.sdk.transforms.View.CreatePCollectionView; |
| import org.apache.beam.sdk.util.SerializableUtils; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.sdk.values.PCollectionView; |
| import org.apache.beam.vendor.grpc.v1p21p0.com.google.protobuf.ByteString; |
| |
| /** |
| * Utility methods for translating a {@link View} transforms to and from {@link RunnerApi} |
| * representations. |
| * |
| * @deprecated this should generally be done as part of {@link ParDo} translation, or moved into a |
| * dedicated runners-core-construction auxiliary class |
| */ |
| @Deprecated |
| public class CreatePCollectionViewTranslation { |
| |
| /** |
| * @deprecated Since {@link CreatePCollectionView} is not a part of the Beam model, there is no |
| * SDK-agnostic specification. Using this method means your runner is tied to Java. |
| */ |
| @Deprecated |
| public static <ElemT, ViewT> PCollectionView<ViewT> getView( |
| AppliedPTransform< |
| PCollection<ElemT>, |
| PCollection<ElemT>, |
| PTransform<PCollection<ElemT>, PCollection<ElemT>>> |
| application) |
| throws IOException { |
| |
| RunnerApi.PTransform transformProto = |
| PTransformTranslation.toProto( |
| application, |
| Collections.emptyList(), |
| SdkComponents.create(application.getPipeline().getOptions())); |
| |
| checkArgument( |
| PTransformTranslation.CREATE_VIEW_TRANSFORM_URN.equals(transformProto.getSpec().getUrn()), |
| "Illegal attempt to extract %s from transform %s with name \"%s\" and URN \"%s\"", |
| PCollectionView.class.getSimpleName(), |
| application.getTransform(), |
| application.getFullName(), |
| transformProto.getSpec().getUrn()); |
| |
| return (PCollectionView<ViewT>) |
| SerializableUtils.deserializeFromByteArray( |
| transformProto.getSpec().getPayload().toByteArray(), |
| PCollectionView.class.getSimpleName()); |
| } |
| |
| /** |
| * @deprecated runners should move away from translating `CreatePCollectionView` and treat this as |
| * part of the translation for a `ParDo` side input. |
| */ |
| @Deprecated |
| static class CreatePCollectionViewTranslator |
| implements TransformPayloadTranslator<View.CreatePCollectionView<?, ?>> { |
| @Override |
| public String getUrn(View.CreatePCollectionView<?, ?> transform) { |
| return PTransformTranslation.CREATE_VIEW_TRANSFORM_URN; |
| } |
| |
| @Override |
| public FunctionSpec translate( |
| AppliedPTransform<?, ?, View.CreatePCollectionView<?, ?>> transform, |
| SdkComponents components) { |
| return FunctionSpec.newBuilder() |
| .setUrn(getUrn(transform.getTransform())) |
| .setPayload( |
| ByteString.copyFrom( |
| SerializableUtils.serializeToByteArray(transform.getTransform().getView()))) |
| .build(); |
| } |
| } |
| |
| /** |
| * Registers {@link CreatePCollectionViewTranslator}. |
| * |
| * @deprecated runners should move away from translating `CreatePCollectionView` and treat this as |
| * part of the translation for a `ParDo` side input. |
| */ |
| @AutoService(TransformPayloadTranslatorRegistrar.class) |
| @Deprecated |
| public static class Registrar implements TransformPayloadTranslatorRegistrar { |
| @Override |
| public Map<? extends Class<? extends PTransform>, ? extends TransformPayloadTranslator> |
| getTransformPayloadTranslators() { |
| return Collections.singletonMap( |
| View.CreatePCollectionView.class, new CreatePCollectionViewTranslator()); |
| } |
| } |
| } |