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   * Licensed to the Apache Software Foundation (ASF) under one
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   * distributed with this work for additional information
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   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
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   *
   *     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,
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   * See the License for the specific language governing permissions and
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  package com.datastax.oss.driver.mapper;
  
  import static org.assertj.core.api.Assertions.assertThat;
  
  import com.datastax.dse.driver.api.core.cql.reactive.ReactiveResultSet;
  import com.datastax.dse.driver.api.mapper.reactive.MappedReactiveResultSet;
  import com.datastax.oss.driver.api.core.CqlIdentifier;
  import com.datastax.oss.driver.api.core.CqlSession;
  import com.datastax.oss.driver.api.core.cql.SimpleStatement;
  import com.datastax.oss.driver.api.mapper.annotations.Dao;
  import com.datastax.oss.driver.api.mapper.annotations.DaoFactory;
  import com.datastax.oss.driver.api.mapper.annotations.DaoKeyspace;
  import com.datastax.oss.driver.api.mapper.annotations.DefaultNullSavingStrategy;
  import com.datastax.oss.driver.api.mapper.annotations.Delete;
  import com.datastax.oss.driver.api.mapper.annotations.Insert;
  import com.datastax.oss.driver.api.mapper.annotations.Mapper;
  import com.datastax.oss.driver.api.mapper.annotations.Select;
  import com.datastax.oss.driver.api.mapper.entity.saving.NullSavingStrategy;
  import com.datastax.oss.driver.api.testinfra.ccm.CcmRule;
  import com.datastax.oss.driver.api.testinfra.ccm.SchemaChangeSynchronizer;
  import com.datastax.oss.driver.api.testinfra.session.SessionRule;
  import com.datastax.oss.driver.categories.ParallelizableTests;
  import io.reactivex.Flowable;
  import java.util.UUID;
  import org.junit.Before;
  import org.junit.BeforeClass;
  import org.junit.ClassRule;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  import org.junit.rules.RuleChain;
  import org.junit.rules.TestRule;
  
  @Category(ParallelizableTests.class)
  public class SelectReactiveIT extends InventoryITBase {
  
    private static CcmRule ccmRule = CcmRule.getInstance();
  
    private static SessionRule<CqlSession> sessionRule = SessionRule.builder(ccmRule).build();
  
    @ClassRule public static TestRule chain = RuleChain.outerRule(ccmRule).around(sessionRule);
  
    private static DseProductDao dao;
  
    @BeforeClass
    public static void setup() {
      CqlSession session = sessionRule.session();
  
      SchemaChangeSynchronizer.withLock(
          () -> {
            for (String query : createStatements(ccmRule)) {
              session.execute(
                  SimpleStatement.builder(query)
                      .setExecutionProfile(sessionRule.slowProfile())
                      .build());
            }
          });
  
      DseInventoryMapper inventoryMapper =
          new SelectReactiveIT_DseInventoryMapperBuilder(session).build();
      dao = inventoryMapper.productDao(sessionRule.keyspace());
    }
  
    @Before
    public void insertData() {
      Flowable.fromPublisher(dao.saveReactive(FLAMETHROWER)).blockingSubscribe();
      Flowable.fromPublisher(dao.saveReactive(MP3_DOWNLOAD)).blockingSubscribe();
    }
  
    @Test
    public void should_select_by_primary_key_reactive() {
      assertThat(Flowable.fromPublisher(dao.findByIdReactive(FLAMETHROWER.getId())).blockingSingle())
          .isEqualTo(FLAMETHROWER);
      Flowable.fromPublisher(dao.deleteReactive(FLAMETHROWER)).blockingSubscribe();
      assertThat(
              Flowable.fromPublisher(dao.findByIdReactive(FLAMETHROWER.getId()))
                  .singleElement()
                  .blockingGet())
          .isNull();
    }
  
    @Mapper
    public interface DseInventoryMapper {
  
      @DaoFactory
      DseProductDao productDao(@DaoKeyspace CqlIdentifier keyspace);
    }
  
    @Dao
    @DefaultNullSavingStrategy(NullSavingStrategy.SET_TO_NULL)
    public interface DseProductDao {
  
      @Select
      MappedReactiveResultSet<Product> findByIdReactive(UUID productId);
  
      @Delete
      ReactiveResultSet deleteReactive(Product product);
  
      @Insert
      ReactiveResultSet saveReactive(Product product);
    }
  }
  