ConfluentKafkaSchemaRegistryTest.java

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 * 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
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 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
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package gobblin.source.extractor.extract.kafka;

import java.util.Properties;

import org.apache.avro.Schema;
import org.apache.avro.SchemaBuilder;

import org.testng.Assert;
import org.testng.annotations.Test;

import io.confluent.kafka.schemaregistry.client.MockSchemaRegistryClient;
import io.confluent.kafka.schemaregistry.client.SchemaRegistryClient;

import gobblin.metrics.kafka.KafkaSchemaRegistry;
import gobblin.metrics.kafka.SchemaRegistryException;


@Test(groups = { "gobblin.source.extractor.extract.kafka" })
public class ConfluentKafkaSchemaRegistryTest {

  private static final String TEST_TOPIC_NAME = "testTopic";
  private static final String TEST_URL = "testUrl";
  private static final String TEST_RECORD_NAME = "testRecord";
  private static final String TEST_NAMESPACE = "testNamespace";
  private static final String TEST_FIELD_NAME = "testField";

  @Test
  public void testRegisterAndGetByKey() throws SchemaRegistryException {
    Properties properties = new Properties();
    properties.setProperty(KafkaSchemaRegistry.KAFKA_SCHEMA_REGISTRY_URL, TEST_URL);

    SchemaRegistryClient schemaRegistryClient = new MockSchemaRegistryClient();
    KafkaSchemaRegistry<Integer, Schema> kafkaSchemaRegistry =
        new ConfluentKafkaSchemaRegistry(properties, schemaRegistryClient);

    Schema schema =
        SchemaBuilder.record(TEST_RECORD_NAME).namespace(TEST_NAMESPACE).fields().name(TEST_FIELD_NAME).type()
            .stringType().noDefault().endRecord();

    Integer id = kafkaSchemaRegistry.register(schema);
    Assert.assertEquals(schema, kafkaSchemaRegistry.getSchemaByKey(id));
  }

  @Test
  public void testRegisterAndGetLatest() throws SchemaRegistryException {
    Properties properties = new Properties();
    properties.setProperty(KafkaSchemaRegistry.KAFKA_SCHEMA_REGISTRY_URL, TEST_URL);

    doTestRegisterAndGetLatest(properties);
  }

  @Test
  public void testRegisterAndGetLatestCustomSuffix() throws SchemaRegistryException {
    Properties properties = new Properties();
    properties.setProperty(KafkaSchemaRegistry.KAFKA_SCHEMA_REGISTRY_URL, TEST_URL);
    properties.setProperty(ConfluentKafkaSchemaRegistry.CONFLUENT_SCHEMA_NAME_SUFFIX, "-key");

    doTestRegisterAndGetLatest(properties);
  }

  private void doTestRegisterAndGetLatest(Properties properties) throws SchemaRegistryException {

    SchemaRegistryClient schemaRegistryClient = new MockSchemaRegistryClient();
    KafkaSchemaRegistry<Integer, Schema> kafkaSchemaRegistry =
        new ConfluentKafkaSchemaRegistry(properties, schemaRegistryClient);

    Schema schema1 =
        SchemaBuilder.record(TEST_RECORD_NAME + "1").namespace(TEST_NAMESPACE).fields().name(TEST_FIELD_NAME).type()
            .stringType().noDefault().endRecord();

    Schema schema2 =
        SchemaBuilder.record(TEST_RECORD_NAME + "2").namespace(TEST_NAMESPACE).fields().name(TEST_FIELD_NAME).type()
            .stringType().noDefault().endRecord();

    kafkaSchemaRegistry.register(schema1, TEST_TOPIC_NAME);
    kafkaSchemaRegistry.register(schema2, TEST_TOPIC_NAME);

    Assert.assertNotEquals(schema1, kafkaSchemaRegistry.getLatestSchemaByTopic(TEST_TOPIC_NAME));
    Assert.assertEquals(schema2, kafkaSchemaRegistry.getLatestSchemaByTopic(TEST_TOPIC_NAME));
  }
}