MySql Database Configuration as primary database

MySqlDatabaseConfiguration

package com.sma.backend.multidb.config;

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(entityManagerFactoryRef = "mysqlEntityManagerFactory", transactionManagerRef = "mysqlTransactionManager", basePackages = {"com.sma.backend.multidb.database.mysql.repository"})

public class MySqlConfig {

    @Primary
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSourceProperties mysqlDataSourceProperties() {
        return new DataSourceProperties();
    }

    @Primary
    @Bean
    public DataSource mysqlDataSource(@Qualifier("mysqlDataSourceProperties") DataSourceProperties dataSourceProperties) {
        return dataSourceProperties.initializeDataSourceBuilder().build();
    }

    @Primary
    @Bean
    public LocalContainerEntityManagerFactoryBean mysqlEntityManagerFactory(@Qualifier("mysqlDataSource") DataSource hubDataSource, EntityManagerFactoryBuilder builder) {
        return builder.dataSource(hubDataSource).packages("com.sma.backend.multidb.database.mysql.domain")
                .persistenceUnit("mysql").build();
    }

    @Primary
    @Bean
    public PlatformTransactionManager mysqlTransactionManager(@Qualifier("mysqlEntityManagerFactory") EntityManagerFactory factory) {
        return new JpaTransactionManager(factory);
    }

}