| /* |
| * 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.dataflow.worker; |
| |
| import static org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Preconditions.checkArgument; |
| import static org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Preconditions.checkState; |
| |
| import com.google.api.services.dataflow.model.SideInputInfo; |
| import java.util.List; |
| import java.util.Map; |
| import org.apache.beam.runners.dataflow.util.CloudObject; |
| import org.apache.beam.runners.dataflow.util.CloudObjects; |
| import org.apache.beam.runners.dataflow.util.PropertyNames; |
| import org.apache.beam.runners.dataflow.util.Structs; |
| import org.apache.beam.runners.dataflow.worker.DataflowExecutionContext.DataflowStepContext; |
| import org.apache.beam.runners.dataflow.worker.util.WorkerPropertyNames; |
| import org.apache.beam.runners.dataflow.worker.util.common.worker.ParDoFn; |
| import org.apache.beam.sdk.coders.Coder; |
| import org.apache.beam.sdk.options.PipelineOptions; |
| import org.apache.beam.sdk.util.WindowedValue.FullWindowedValueCoder; |
| import org.apache.beam.sdk.values.TupleTag; |
| |
| /** |
| * A {@link ParDoFnFactory} which constructs {@link StreamingPCollectionViewWriterParDoFn}s used to |
| * write side input data. |
| * |
| * <p>Note that this {@link ParDoFnFactory} may only be used in a streaming context. |
| */ |
| public class StreamingPCollectionViewWriterDoFnFactory implements ParDoFnFactory { |
| |
| @Override |
| public ParDoFn create( |
| PipelineOptions options, |
| CloudObject cloudUserFn, |
| List<SideInputInfo> sideInputInfos, |
| TupleTag<?> mainOutputTag, |
| Map<TupleTag<?>, Integer> outputTupleTagsToReceiverIndices, |
| DataflowExecutionContext<?> executionContext, |
| DataflowOperationContext operationContext) |
| throws Exception { |
| DataflowStepContext stepContext = executionContext.getStepContext(operationContext); |
| checkArgument( |
| stepContext instanceof StreamingModeExecutionContext.StreamingModeStepContext, |
| "stepContext must be a StreamingModeStepContext to use StreamingPCollectionViewWriterFn"); |
| |
| Coder<?> coder = |
| CloudObjects.coderFromCloudObject( |
| CloudObject.fromSpec(Structs.getObject(cloudUserFn, PropertyNames.ENCODING))); |
| checkState( |
| coder instanceof FullWindowedValueCoder, |
| "Expected to received an instanceof an %s but got %s", |
| FullWindowedValueCoder.class.getSimpleName(), |
| coder); |
| FullWindowedValueCoder<?> windowedValueCoder = (FullWindowedValueCoder<?>) coder; |
| return new StreamingPCollectionViewWriterParDoFn( |
| (StreamingModeExecutionContext.StreamingModeStepContext) stepContext, |
| new TupleTag<>(Structs.getString(cloudUserFn, WorkerPropertyNames.SIDE_INPUT_ID)), |
| (Coder) windowedValueCoder.getValueCoder(), |
| (Coder) windowedValueCoder.getWindowCoder()); |
| } |
| } |