如何以编程方式调用Spring JPA模式生成脚本

Question

我为多租户环境创建了一个REST服务器应用程序。 我正在使用Spring Boot 2.x，Spring Data REST，Hibernate 5，Mysql 5.7。

由于这个原因，我禁用了数据源的自动配置，并且我有自己的Hibernate配置：

@Configuration
@Profile("prod")
public class HibernateConfig {

    @Autowired
    private Environment env;

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(MultiTenantConnectionProvider multiTenantConnectionProviderImpl,
            CurrentTenantIdentifierResolver currentTenantIdentifierResolverImpl) throws InstantiationException, IllegalAccessException,
            ClassNotFoundException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException {
        Map<String, Object> properties = new HashMap<>();
        properties.put(org.hibernate.cfg.Environment.MULTI_TENANT, MultiTenancyStrategy.DATABASE);
        properties.put(org.hibernate.cfg.Environment.MULTI_TENANT_CONNECTION_PROVIDER, multiTenantConnectionProviderImpl);
        properties.put(org.hibernate.cfg.Environment.MULTI_TENANT_IDENTIFIER_RESOLVER, currentTenantIdentifierResolverImpl);
        LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
        em.setDataSource(primaryDataSource());
        em.setPackagesToScan("cloud.optix.server");
        em.setJpaPropertyMap(properties);

        HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
        em.setJpaVendorAdapter(vendorAdapter);
        properties = new HashMap<>();
        properties.put("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
        properties.put("hibernate.dialect", env.getProperty("hibernate.dialect"));
        properties.put("hibernate.show_sql", env.getProperty("hibernate.show_sql"));
        properties.put("hibernate.implicit_naming_strategy", env.getProperty("hibernate.implicit_naming_strategy"));

        properties.put("hibernate.jdbc.fetch_size", env.getProperty("hibernate.jdbc.fetch_size"));
        properties.put("hibernate.jdbc.batch_size", env.getProperty("hibernate.jdbc.batch_size"));
        properties.put("hibernate.max_fetch_depth", env.getProperty("hibernate.max_fetch_depth"));
        properties.put("hibernate.cache.use_second_level_cache", env.getProperty("hibernate.cache.use_second_level_cache"));
        properties.put("hibernate.jdbc.time_zone", env.getProperty("hibernate.jdbc.time_zone"));
        properties.put("hibernate.globally_quoted_identifiers", env.getProperty("hibernate.globally_quoted_identifiers"));
        properties.put("hibernate.globally_quoted_identifiers_skip_column_definitions",
                env.getProperty("hibernate.globally_quoted_identifiers_skip_column_definitions"));
        em.setJpaPropertyMap(properties);

        return em;
    }

    @Primary
    @Bean
    public DataSource primaryDataSource() throws InstantiationException, IllegalAccessException, ClassNotFoundException,
            IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException {
        final SimpleDriverDataSource dataSource = new SimpleDriverDataSource();
        dataSource.setDriver(((Driver) Class.forName(env.getProperty("primary.datasource.driver-class-name")).getDeclaredConstructor()
                .newInstance(null)));
        dataSource.setUrl(env.getProperty("primary.datasource.url"));
        dataSource.setUsername(env.getProperty("primary.datasource.username"));
        dataSource.setPassword(env.getProperty("primary.datasource.password"));
        return dataSource;
    }

    @Primary
    @Bean
    public PlatformTransactionManager primaryTransactionManager(MultiTenantConnectionProvider multiTenantConnectionProviderImpl,
            CurrentTenantIdentifierResolver currentTenantIdentifierResolverImpl) throws InstantiationException, IllegalAccessException,
            ClassNotFoundException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException {
        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(
                entityManagerFactory(multiTenantConnectionProviderImpl, currentTenantIdentifierResolverImpl).getObject());
        return transactionManager;
    }

}

主要数据源是空的，Hibernate需要它来工作。 我想运行Spring JPA生成脚本来创建和更新DDL（sql文件）。 在一个租户环境中，我使用：

spring.jpa.properties.javax.persistence.schema-generation.create-source=metadata
spring.jpa.properties.javax.persistence.schema-generation.scripts.action=create
spring.jpa.properties.javax.persistence.schema-generation.scripts.create-target=create.sql

或

spring.jpa.properties.javax.persistence.schema-generation.create-source=metadata
spring.jpa.properties.javax.persistence.schema-generation.scripts.action=update
spring.jpa.properties.javax.persistence.schema-generation.scripts.create-target=update.sql

分别生成一个创建DDL和更新DDL，它很吸引人！

我想知道是否有一种方法可以使用Spring工具在租户的数据源/连接上以编程方式调用脚本执行。