| /* |
| * 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.flink; |
| |
| import static org.apache.beam.vendor.guava.v20_0.com.google.common.base.Preconditions.checkNotNull; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.stream.Collectors; |
| import org.apache.beam.runners.core.construction.TransformInputs; |
| import org.apache.beam.runners.flink.translation.types.CoderTypeInformation; |
| import org.apache.beam.sdk.coders.Coder; |
| import org.apache.beam.sdk.options.PipelineOptions; |
| import org.apache.beam.sdk.runners.AppliedPTransform; |
| import org.apache.beam.sdk.transforms.PTransform; |
| import org.apache.beam.sdk.util.WindowedValue; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.sdk.values.PInput; |
| import org.apache.beam.sdk.values.POutput; |
| import org.apache.beam.sdk.values.PValue; |
| import org.apache.beam.sdk.values.TupleTag; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.collect.Iterables; |
| import org.apache.flink.api.common.typeinfo.TypeInformation; |
| import org.apache.flink.streaming.api.datastream.DataStream; |
| import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; |
| |
| /** |
| * Helper for keeping track of which {@link DataStream DataStreams} map to which {@link PTransform |
| * PTransforms}. |
| */ |
| class FlinkStreamingTranslationContext { |
| |
| private final StreamExecutionEnvironment env; |
| private final PipelineOptions options; |
| |
| /** |
| * Keeps a mapping between the output value of the PTransform and the Flink Operator |
| * that produced it, after the translation of the correspondinf PTransform to its Flink |
| * equivalent. |
| */ |
| private final Map<PValue, DataStream<?>> dataStreams; |
| |
| private AppliedPTransform<?, ?, ?> currentTransform; |
| |
| public FlinkStreamingTranslationContext(StreamExecutionEnvironment env, PipelineOptions options) { |
| this.env = checkNotNull(env); |
| this.options = checkNotNull(options); |
| this.dataStreams = new HashMap<>(); |
| } |
| |
| public StreamExecutionEnvironment getExecutionEnvironment() { |
| return env; |
| } |
| |
| public PipelineOptions getPipelineOptions() { |
| return options; |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> DataStream<T> getInputDataStream(PValue value) { |
| return (DataStream<T>) dataStreams.get(value); |
| } |
| |
| public void setOutputDataStream(PValue value, DataStream<?> set) { |
| if (!dataStreams.containsKey(value)) { |
| dataStreams.put(value, set); |
| } |
| } |
| |
| /** |
| * Sets the AppliedPTransform which carries input/output. |
| * |
| * @param currentTransform |
| */ |
| public void setCurrentTransform(AppliedPTransform<?, ?, ?> currentTransform) { |
| this.currentTransform = currentTransform; |
| } |
| |
| public <T> Coder<WindowedValue<T>> getWindowedInputCoder(PCollection<T> collection) { |
| Coder<T> valueCoder = collection.getCoder(); |
| |
| return WindowedValue.getFullCoder( |
| valueCoder, collection.getWindowingStrategy().getWindowFn().windowCoder()); |
| } |
| |
| public <T> Coder<T> getInputCoder(PCollection<T> collection) { |
| return collection.getCoder(); |
| } |
| |
| public Map<TupleTag<?>, Coder<?>> getOutputCoders() { |
| return currentTransform.getOutputs().entrySet().stream() |
| .filter(e -> e.getValue() instanceof PCollection) |
| .collect(Collectors.toMap(e -> e.getKey(), e -> ((PCollection) e.getValue()).getCoder())); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> TypeInformation<WindowedValue<T>> getTypeInfo(PCollection<T> collection) { |
| Coder<T> valueCoder = collection.getCoder(); |
| WindowedValue.FullWindowedValueCoder<T> windowedValueCoder = |
| WindowedValue.getFullCoder( |
| valueCoder, collection.getWindowingStrategy().getWindowFn().windowCoder()); |
| |
| return new CoderTypeInformation<>(windowedValueCoder); |
| } |
| |
| public AppliedPTransform<?, ?, ?> getCurrentTransform() { |
| return currentTransform; |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T extends PValue> T getInput(PTransform<T, ?> transform) { |
| return (T) Iterables.getOnlyElement(TransformInputs.nonAdditionalInputs(currentTransform)); |
| } |
| |
| public <T extends PInput> Map<TupleTag<?>, PValue> getInputs(PTransform<T, ?> transform) { |
| return currentTransform.getInputs(); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T extends PValue> T getOutput(PTransform<?, T> transform) { |
| return (T) Iterables.getOnlyElement(currentTransform.getOutputs().values()); |
| } |
| |
| public <OutputT extends POutput> Map<TupleTag<?>, PValue> getOutputs( |
| PTransform<?, OutputT> transform) { |
| return currentTransform.getOutputs(); |
| } |
| } |