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[HUDI-1343] Add standard schema postprocessor which would rewrite the schema using spark-avro conversion (#2192)

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Co-authored-by: liujh <liujh@t3go.cn>
This commit is contained in:
liujinhui
2020-12-04 11:28:34 +08:00
committed by GitHub
parent 1f0d5c077e
commit 62b392b49c
5 changed files with 133 additions and 5 deletions
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36
hudi-utilities/src/test/java/org/apache/hudi/utilities/SparkAvroSchemaProvider.java Normal file
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@@ -0,0 +1,36 @@
/*
* 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.hudi.utilities;
import org.apache.avro.Schema;
import org.apache.hudi.common.config.TypedProperties;
import org.apache.hudi.utilities.schema.SchemaProvider;
import org.apache.spark.api.java.JavaSparkContext;
public class SparkAvroSchemaProvider extends SchemaProvider {
public SparkAvroSchemaProvider(TypedProperties props, JavaSparkContext jssc) {
super(props, jssc);
}
@Override
public Schema getSourceSchema() {
return new Schema.Parser().parse("{\"type\":\"record\",\"name\":\"test\",\"fields\":[{\"name\": \"day\", \"type\":\"string\"}]}");
}
}

38
hudi-utilities/src/test/java/org/apache/hudi/utilities/TestSchemaPostProcessor.java
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@@ -22,15 +22,20 @@ import org.apache.hudi.common.config.TypedProperties;
import org.apache.hudi.utilities.schema.SchemaPostProcessor;
import org.apache.hudi.utilities.schema.SchemaPostProcessor.Config;
import org.apache.hudi.utilities.schema.SchemaProvider;
import org.apache.hudi.utilities.schema.SparkAvroPostProcessor;
import org.apache.hudi.utilities.testutils.UtilitiesTestBase;
import org.apache.avro.Schema;
import org.apache.avro.Schema.Type;
import org.apache.avro.SchemaBuilder;
import org.apache.hudi.utilities.transform.FlatteningTransformer;
import org.apache.spark.api.java.JavaSparkContext;
import org.junit.jupiter.api.Test;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
@@ -39,13 +44,19 @@ public class TestSchemaPostProcessor extends UtilitiesTestBase {
private TypedProperties properties = new TypedProperties();
private static String ORIGINAL_SCHEMA = "{\"name\":\"t3_biz_operation_t_driver\",\"type\":\"record\",\"fields\":[{\"name\":\"ums_id_\",\"type\":[\"null\",\"string\"],\"default\":null},"
+ "{\"name\":\"ums_ts_\",\"type\":[\"null\",\"string\"],\"default\":null}]}";
private static String RESULT_SCHEMA = "{\"type\":\"record\",\"name\":\"hoodie_source\",\"namespace\":\"hoodie.source\",\"fields\":[{\"name\":\"ums_id_\",\"type\":[\"string\",\"null\"]},"
+ "{\"name\":\"ums_ts_\",\"type\":[\"string\",\"null\"]}]}";
@Test
public void testPostProcessor() throws IOException {
properties.put(Config.SCHEMA_POST_PROCESSOR_PROP, DummySchemaPostProcessor.class.getName());
SchemaProvider provider =
UtilHelpers.wrapSchemaProviderWithPostProcessor(
UtilHelpers.createSchemaProvider(DummySchemaProvider.class.getName(), properties, jsc),
properties, jsc);
properties, jsc,null);
Schema schema = provider.getSourceSchema();
assertEquals(schema.getType(), Type.RECORD);
@@ -53,6 +64,31 @@ public class TestSchemaPostProcessor extends UtilitiesTestBase {
assertNotNull(schema.getField("testString"));
}
@Test
public void testSparkAvro() throws IOException {
properties.put(Config.SCHEMA_POST_PROCESSOR_PROP, SparkAvroPostProcessor.class.getName());
List<String> transformerClassNames = new ArrayList<>();
transformerClassNames.add(FlatteningTransformer.class.getName());
SchemaProvider provider =
UtilHelpers.wrapSchemaProviderWithPostProcessor(
UtilHelpers.createSchemaProvider(SparkAvroSchemaProvider.class.getName(), properties, jsc),
properties, jsc, transformerClassNames);
Schema schema = provider.getSourceSchema();
assertEquals(schema.getType(), Type.RECORD);
assertEquals(schema.getName(), "hoodie_source");
assertEquals(schema.getNamespace(), "hoodie.source");
assertNotNull(schema.getField("day"));
}
@Test
public void testSparkAvroSchema() throws IOException {
SparkAvroPostProcessor processor = new SparkAvroPostProcessor(properties, null);
Schema schema = new Schema.Parser().parse(ORIGINAL_SCHEMA);
assertEquals(processor.processSchema(schema).toString(), RESULT_SCHEMA);
}
public static class DummySchemaPostProcessor extends SchemaPostProcessor {
public DummySchemaPostProcessor(TypedProperties props, JavaSparkContext jssc) {