| /* |
| * 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.gearpump.translators; |
| |
| import static org.apache.beam.vendor.guava.v20_0.com.google.common.base.Preconditions.checkArgument; |
| |
| import io.gearpump.cluster.UserConfig; |
| import io.gearpump.streaming.dsl.javaapi.JavaStream; |
| import io.gearpump.streaming.dsl.javaapi.JavaStreamApp; |
| import io.gearpump.streaming.source.DataSource; |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.apache.beam.runners.core.construction.TransformInputs; |
| import org.apache.beam.runners.gearpump.GearpumpPipelineOptions; |
| import org.apache.beam.sdk.Pipeline; |
| import org.apache.beam.sdk.runners.AppliedPTransform; |
| import org.apache.beam.sdk.runners.TransformHierarchy; |
| 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; |
| |
| /** Maintains context data for {@link TransformTranslator}s. */ |
| @SuppressWarnings({"rawtypes", "unchecked"}) |
| public class TranslationContext { |
| |
| private final JavaStreamApp streamApp; |
| private final GearpumpPipelineOptions pipelineOptions; |
| private AppliedPTransform<?, ?, ?> currentTransform; |
| private final Map<PValue, JavaStream<?>> streams = new HashMap<>(); |
| |
| public TranslationContext(JavaStreamApp streamApp, GearpumpPipelineOptions pipelineOptions) { |
| this.streamApp = streamApp; |
| this.pipelineOptions = pipelineOptions; |
| } |
| |
| public void setCurrentTransform(TransformHierarchy.Node treeNode, Pipeline pipeline) { |
| this.currentTransform = treeNode.toAppliedPTransform(pipeline); |
| } |
| |
| public GearpumpPipelineOptions getPipelineOptions() { |
| return pipelineOptions; |
| } |
| |
| public <InputT> JavaStream<InputT> getInputStream(PValue input) { |
| return (JavaStream<InputT>) streams.get(input); |
| } |
| |
| public <OutputT> void setOutputStream(PValue output, JavaStream<OutputT> outputStream) { |
| if (!streams.containsKey(output)) { |
| streams.put(output, outputStream); |
| } else { |
| throw new RuntimeException("set stream for duplicated output " + output); |
| } |
| } |
| |
| public Map<TupleTag<?>, PValue> getInputs() { |
| return getCurrentTransform().getInputs(); |
| } |
| |
| public PValue getInput() { |
| return Iterables.getOnlyElement(TransformInputs.nonAdditionalInputs(getCurrentTransform())); |
| } |
| |
| public Map<TupleTag<?>, PValue> getOutputs() { |
| return getCurrentTransform().getOutputs(); |
| } |
| |
| public PValue getOutput() { |
| return Iterables.getOnlyElement(getOutputs().values()); |
| } |
| |
| public AppliedPTransform<?, ?, ?> getCurrentTransform() { |
| checkArgument(currentTransform != null, "current transform not set"); |
| return currentTransform; |
| } |
| |
| public <T> JavaStream<T> getSourceStream(DataSource dataSource) { |
| return streamApp.source( |
| dataSource, pipelineOptions.getParallelism(), UserConfig.empty(), "source"); |
| } |
| } |