| /* |
| * 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.sdk.fn.data; |
| |
| import static org.apache.beam.vendor.guava.v20_0.com.google.common.base.Preconditions.checkArgument; |
| |
| import com.google.auto.value.AutoValue; |
| import org.apache.beam.model.fnexecution.v1.BeamFnApi.RemoteGrpcPort; |
| import org.apache.beam.model.pipeline.v1.RunnerApi.FunctionSpec; |
| import org.apache.beam.model.pipeline.v1.RunnerApi.PTransform; |
| import org.apache.beam.vendor.grpc.v1p13p1.com.google.protobuf.InvalidProtocolBufferException; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.collect.Iterables; |
| |
| /** |
| * An execution-time only {@link PTransform} which represents an SDK harness reading from a {@link |
| * RemoteGrpcPort}. |
| */ |
| @AutoValue |
| public abstract class RemoteGrpcPortRead { |
| public static final String URN = "urn:org.apache.beam:source:runner:0.1"; |
| private static final String LOCAL_OUTPUT_ID = "local_output"; |
| |
| public static RemoteGrpcPortRead readFromPort(RemoteGrpcPort port, String outputPCollectionId) { |
| return new AutoValue_RemoteGrpcPortRead(port, outputPCollectionId); |
| } |
| |
| public static RemoteGrpcPortRead fromPTransform(PTransform pTransform) |
| throws InvalidProtocolBufferException { |
| checkArgument( |
| URN.equals(pTransform.getSpec().getUrn()), |
| "Expected URN for %s, got %s", |
| RemoteGrpcPortRead.class.getSimpleName(), |
| pTransform.getSpec().getUrn()); |
| checkArgument( |
| pTransform.getOutputsCount() == 1, |
| "Expected exactly one output, got %s", |
| pTransform.getOutputsCount()); |
| RemoteGrpcPort port = RemoteGrpcPort.parseFrom(pTransform.getSpec().getPayload()); |
| String outputPcollection = Iterables.getOnlyElement(pTransform.getOutputsMap().values()); |
| return readFromPort(port, outputPcollection); |
| } |
| |
| public PTransform toPTransform() { |
| return PTransform.newBuilder() |
| .setSpec(FunctionSpec.newBuilder().setUrn(URN).setPayload(getPort().toByteString()).build()) |
| .putOutputs(LOCAL_OUTPUT_ID, getOutputPCollectionId()) |
| .build(); |
| } |
| |
| public abstract RemoteGrpcPort getPort(); |
| |
| abstract String getOutputPCollectionId(); |
| } |