| /* |
| * 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.samza.translation; |
| |
| import org.apache.beam.model.pipeline.v1.RunnerApi; |
| import org.apache.beam.runners.core.construction.WindowingStrategyTranslation; |
| import org.apache.beam.runners.core.construction.graph.PipelineNode; |
| import org.apache.beam.runners.core.construction.graph.QueryablePipeline; |
| import org.apache.beam.runners.samza.runtime.OpAdapter; |
| import org.apache.beam.runners.samza.runtime.OpMessage; |
| import org.apache.beam.runners.samza.runtime.WindowAssignOp; |
| import org.apache.beam.sdk.runners.TransformHierarchy; |
| import org.apache.beam.sdk.transforms.windowing.Window; |
| import org.apache.beam.sdk.transforms.windowing.WindowFn; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.vendor.grpc.v1p26p0.com.google.protobuf.InvalidProtocolBufferException; |
| import org.apache.samza.operators.MessageStream; |
| |
| /** |
| * Translates {@link org.apache.beam.sdk.transforms.windowing.Window.Assign} to Samza {@link |
| * WindowAssignOp}. |
| */ |
| class WindowAssignTranslator<T> implements TransformTranslator<Window.Assign<T>> { |
| @Override |
| public void translate( |
| Window.Assign<T> transform, TransformHierarchy.Node node, TranslationContext ctx) { |
| final PCollection<T> output = ctx.getOutput(transform); |
| |
| @SuppressWarnings("unchecked") |
| final WindowFn<T, ?> windowFn = (WindowFn<T, ?>) output.getWindowingStrategy().getWindowFn(); |
| |
| final MessageStream<OpMessage<T>> inputStream = ctx.getMessageStream(ctx.getInput(transform)); |
| |
| final MessageStream<OpMessage<T>> outputStream = |
| inputStream.flatMap(OpAdapter.adapt(new WindowAssignOp<>(windowFn))); |
| |
| ctx.registerMessageStream(output, outputStream); |
| } |
| |
| @Override |
| public void translatePortable( |
| PipelineNode.PTransformNode transform, |
| QueryablePipeline pipeline, |
| PortableTranslationContext ctx) { |
| final RunnerApi.WindowIntoPayload payload; |
| try { |
| payload = |
| RunnerApi.WindowIntoPayload.parseFrom(transform.getTransform().getSpec().getPayload()); |
| } catch (InvalidProtocolBufferException e) { |
| throw new IllegalArgumentException( |
| String.format("failed to parse WindowIntoPayload: %s", transform.getId()), e); |
| } |
| |
| @SuppressWarnings("unchecked") |
| final WindowFn<T, ?> windowFn = |
| (WindowFn<T, ?>) WindowingStrategyTranslation.windowFnFromProto(payload.getWindowFn()); |
| |
| final MessageStream<OpMessage<T>> inputStream = ctx.getOneInputMessageStream(transform); |
| |
| final MessageStream<OpMessage<T>> outputStream = |
| inputStream.flatMap(OpAdapter.adapt(new WindowAssignOp<>(windowFn))); |
| |
| ctx.registerMessageStream(ctx.getOutputId(transform), outputStream); |
| } |
| } |