| /* |
| * 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.spark; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| import static org.mockito.Mockito.mock; |
| |
| import org.apache.beam.runners.spark.translation.Dataset; |
| import org.apache.beam.runners.spark.translation.EvaluationContext; |
| import org.apache.beam.runners.spark.translation.SparkContextFactory; |
| import org.apache.beam.runners.spark.translation.TransformTranslator; |
| import org.apache.beam.sdk.Pipeline; |
| import org.apache.beam.sdk.coders.Coder; |
| import org.apache.beam.sdk.options.PipelineOptionsFactory; |
| import org.apache.beam.sdk.transforms.Count; |
| import org.apache.beam.sdk.transforms.Create; |
| import org.apache.beam.sdk.transforms.Create.Values; |
| import org.apache.beam.sdk.transforms.GroupByKey; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.spark.api.java.JavaSparkContext; |
| import org.junit.Test; |
| |
| /** Tests of {@link Dataset#cache(String, Coder)}} scenarios. */ |
| public class CacheTest { |
| |
| /** |
| * Test checks how the cache candidates map is populated by the runner when evaluating the |
| * pipeline. |
| */ |
| @Test |
| public void cacheCandidatesUpdaterTest() { |
| SparkPipelineOptions options = createOptions(); |
| Pipeline pipeline = Pipeline.create(options); |
| PCollection<String> pCollection = pipeline.apply(Create.of("foo", "bar")); |
| // first read |
| pCollection.apply(Count.globally()); |
| // second read |
| // as we access the same PCollection two times, the Spark runner does optimization and so |
| // will cache the RDD representing this PCollection |
| pCollection.apply(Count.globally()); |
| |
| JavaSparkContext jsc = SparkContextFactory.getSparkContext(options); |
| EvaluationContext ctxt = new EvaluationContext(jsc, pipeline, options); |
| SparkRunner.CacheVisitor cacheVisitor = |
| new SparkRunner.CacheVisitor(new TransformTranslator.Translator(), ctxt); |
| pipeline.traverseTopologically(cacheVisitor); |
| assertEquals(2L, (long) ctxt.getCacheCandidates().get(pCollection)); |
| } |
| |
| @Test |
| public void shouldCacheTest() { |
| SparkPipelineOptions options = createOptions(); |
| options.setCacheDisabled(true); |
| Pipeline pipeline = Pipeline.create(options); |
| |
| Values<String> valuesTransform = Create.of("foo", "bar"); |
| PCollection pCollection = mock(PCollection.class); |
| |
| JavaSparkContext jsc = SparkContextFactory.getSparkContext(options); |
| EvaluationContext ctxt = new EvaluationContext(jsc, pipeline, options); |
| ctxt.getCacheCandidates().put(pCollection, 2L); |
| |
| assertFalse(ctxt.shouldCache(valuesTransform, pCollection)); |
| |
| options.setCacheDisabled(false); |
| assertTrue(ctxt.shouldCache(valuesTransform, pCollection)); |
| |
| GroupByKey<String, String> gbkTransform = GroupByKey.create(); |
| assertFalse(ctxt.shouldCache(gbkTransform, pCollection)); |
| } |
| |
| private SparkPipelineOptions createOptions() { |
| SparkPipelineOptions options = |
| PipelineOptionsFactory.create().as(TestSparkPipelineOptions.class); |
| options.setRunner(TestSparkRunner.class); |
| return options; |
| } |
| } |