| /* |
| * 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 java.io.Closeable; |
| import java.util.concurrent.Callable; |
| import org.apache.beam.runners.core.construction.graph.PipelineNode.PTransformNode; |
| import org.apache.beam.runners.core.metrics.MetricUpdates; |
| import org.apache.beam.runners.core.metrics.MetricsContainerImpl; |
| import org.apache.beam.sdk.metrics.MetricsEnvironment; |
| import org.apache.beam.sdk.util.WindowedValue; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.annotations.VisibleForTesting; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * A {@link Callable} responsible for constructing a {@link TransformEvaluator} from a {@link |
| * TransformEvaluatorFactory} and evaluating it on some bundle of input, and registering the result |
| * using a registered {@link CompletionCallback}. |
| */ |
| class DirectTransformExecutor<T> implements TransformExecutor { |
| private static final Logger LOG = LoggerFactory.getLogger(DirectTransformExecutor.class); |
| |
| static class Factory implements TransformExecutorFactory { |
| private final EvaluationContext context; |
| private final TransformEvaluatorRegistry registry; |
| |
| Factory(EvaluationContext context, TransformEvaluatorRegistry registry) { |
| this.context = context; |
| this.registry = registry; |
| } |
| |
| @Override |
| public TransformExecutor create( |
| CommittedBundle<?> bundle, |
| PTransformNode transform, |
| CompletionCallback onComplete, |
| TransformExecutorService executorService) { |
| return new DirectTransformExecutor<>( |
| context, registry, bundle, transform, onComplete, executorService); |
| } |
| } |
| |
| private final TransformEvaluatorRegistry evaluatorRegistry; |
| |
| /** The transform that will be evaluated. */ |
| private final PTransformNode transform; |
| /** The inputs this {@link DirectTransformExecutor} will deliver to the transform. */ |
| private final CommittedBundle<T> inputBundle; |
| |
| private final CompletionCallback onComplete; |
| private final TransformExecutorService transformEvaluationState; |
| private final EvaluationContext context; |
| |
| @VisibleForTesting |
| DirectTransformExecutor( |
| EvaluationContext context, |
| TransformEvaluatorRegistry factory, |
| CommittedBundle<T> inputBundle, |
| PTransformNode transform, |
| CompletionCallback completionCallback, |
| TransformExecutorService transformEvaluationState) { |
| this.evaluatorRegistry = factory; |
| |
| this.inputBundle = inputBundle; |
| this.transform = transform; |
| |
| this.onComplete = completionCallback; |
| |
| this.transformEvaluationState = transformEvaluationState; |
| this.context = context; |
| } |
| |
| @Override |
| public void run() { |
| MetricsContainerImpl metricsContainer = new MetricsContainerImpl(transform.getId()); |
| try (Closeable metricsScope = MetricsEnvironment.scopedMetricsContainer(metricsContainer)) { |
| TransformEvaluator<T> evaluator = evaluatorRegistry.forApplication(transform, inputBundle); |
| if (evaluator == null) { |
| onComplete.handleEmpty(transform); |
| // Nothing to do |
| return; |
| } |
| |
| processElements(evaluator, metricsContainer); |
| |
| finishBundle(evaluator, metricsContainer); |
| } catch (Exception e) { |
| onComplete.handleException(inputBundle, e); |
| if (e instanceof RuntimeException) { |
| throw (RuntimeException) e; |
| } |
| throw new RuntimeException(e); |
| } catch (Error err) { |
| LOG.error("Error occurred within {}", this, err); |
| onComplete.handleError(err); |
| throw err; |
| } finally { |
| // Report the physical metrics from the end of this step. |
| context.getMetrics().commitPhysical(inputBundle, metricsContainer.getCumulative()); |
| |
| transformEvaluationState.complete(this); |
| } |
| } |
| |
| /** Processes all the elements in the input bundle using the transform evaluator. */ |
| private void processElements( |
| TransformEvaluator<T> evaluator, MetricsContainerImpl metricsContainer) throws Exception { |
| if (inputBundle != null) { |
| for (WindowedValue<T> value : inputBundle.getElements()) { |
| evaluator.processElement(value); |
| |
| // Report the physical metrics after each element |
| MetricUpdates deltas = metricsContainer.getUpdates(); |
| if (deltas != null) { |
| context.getMetrics().updatePhysical(inputBundle, deltas); |
| metricsContainer.commitUpdates(); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Finishes processing the input bundle and commit the result using the {@link |
| * CompletionCallback}. |
| * |
| * @return the {@link TransformResult} produced by {@link TransformEvaluator#finishBundle()} |
| */ |
| private TransformResult<T> finishBundle( |
| TransformEvaluator<T> evaluator, MetricsContainerImpl metricsContainer) throws Exception { |
| TransformResult<T> result = |
| evaluator.finishBundle().withLogicalMetricUpdates(metricsContainer.getCumulative()); |
| onComplete.handleResult(inputBundle, result); |
| return result; |
| } |
| } |