| /* |
| * 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.direct.portable; |
| |
| import javax.annotation.Nullable; |
| import org.apache.beam.model.pipeline.v1.RunnerApi; |
| import org.apache.beam.model.pipeline.v1.RunnerApi.Components; |
| import org.apache.beam.model.pipeline.v1.RunnerApi.PCollection; |
| import org.apache.beam.model.pipeline.v1.RunnerApi.PTransform; |
| import org.apache.beam.model.pipeline.v1.RunnerApi.Pipeline; |
| import org.apache.beam.runners.core.construction.graph.PipelineNode; |
| import org.apache.beam.runners.core.construction.graph.PipelineNode.PCollectionNode; |
| import org.apache.beam.runners.core.construction.graph.PipelineNode.PTransformNode; |
| import org.apache.beam.runners.direct.ExecutableGraph; |
| |
| /** |
| * A builder of simple {@link ExecutableGraph ExecutableGraphs} suitable for use in the portable |
| * direct runner, to reduce verbosity of creating a graph with no payloads of any meaning. |
| */ |
| public class ExecutableGraphBuilder { |
| private final RunnerApi.Components.Builder components; |
| |
| private ExecutableGraphBuilder() { |
| components = Components.newBuilder(); |
| } |
| |
| public static ExecutableGraphBuilder create() { |
| return new ExecutableGraphBuilder(); |
| } |
| |
| public ExecutableGraphBuilder addTransform( |
| String name, @Nullable String input, String... outputs) { |
| PTransform.Builder pt = PTransform.newBuilder().setUniqueName(name); |
| if (input != null) { |
| pt = pt.putInputs("input", input); |
| addPCollection(input); |
| } |
| for (String output : outputs) { |
| pt = pt.putOutputs(output, output); |
| addPCollection(output); |
| } |
| components.putTransforms(name, pt.build()); |
| return this; |
| } |
| |
| private ExecutableGraphBuilder addPCollection(String name) { |
| components.putPcollections(name, PCollection.newBuilder().setUniqueName(name).build()); |
| return this; |
| } |
| |
| public PTransformNode transformNode(String name) { |
| return PipelineNode.pTransform(name, components.getTransformsOrThrow(name)); |
| } |
| |
| public PCollectionNode collectionNode(String name) { |
| return PipelineNode.pCollection(name, components.getPcollectionsOrThrow(name)); |
| } |
| |
| public ExecutableGraph<PTransformNode, PCollectionNode> toGraph() { |
| return PortableGraph.forPipeline( |
| Pipeline.newBuilder() |
| .setComponents(components) |
| .addAllRootTransformIds(components.getTransformsMap().keySet()) |
| .build()); |
| } |
| } |