java – 使用Spring MVC和Hibernate在多租户数据库应用程序中动态添加租户

我正在开发使用多租户数据库配置的Web应用程序.

我想动态添加租户.

我添加了主控制器来创建主模式,其中包含动态创建的租户记录.

但问题是,当我请求创建租户时,它去了MultitenantConnectionProvider我在那里创建了数据库但是在数据库中我想扫描包com.appointment.schedular.model.tenant并在ne数据库中创建表.

Source code

MasterDatabaseConfig.java

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        basePackages = "com.appointment.schedular.dao.master",entityManagerFactoryRef = "masterEntityManager",transactionManagerRef = "masterTransactionManager"
)
@PropertySource("classpath:application.properties")
public class MasterDatabaseConfig {

   @Autowired
   private Environment springEnvironment;

   @Bean(name="masterDataSource")
   public DataSource masterDataSource() {
      DriverManagerDataSource dataSource = new DriverManagerDataSource();
      dataSource.setDriverClassName(springEnvironment.getProperty("master.datasource.classname"));
      dataSource.setUrl(springEnvironment.getProperty("master.datasource.url") + "?createDatabaseIfNotExist=true");
      dataSource.setUsername(springEnvironment.getProperty("master.datasource.user"));
      dataSource.setPassword(springEnvironment.getProperty("master.datasource.password"));
      return dataSource;
   }

   @Bean(name = "masterEntityManager")
   @Primary
   public LocalContainerEntityManagerFactoryBean masterEntityManagerFactory() {
      LocalContainerEntityManagerFactoryBean entityManagerFactoryBean 
              = new LocalContainerEntityManagerFactoryBean();
      entityManagerFactoryBean.setDataSource(masterDataSource());
      entityManagerFactoryBean.setPersistenceProviderClass(HibernatePersistenceProvider.class);
      JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
      entityManagerFactoryBean.setJpaVendorAdapter(vendorAdapter);
      entityManagerFactoryBean.setPackagesToScan(new String[]{"com.appointment.schedular.model.master"});
      entityManagerFactoryBean.setJpaProperties(getHibernateProperties());
      entityManagerFactoryBean.setPersistenceUnitName("master");
      return entityManagerFactoryBean;
   }

   private Properties getHibernateProperties() {
      Properties properties = new Properties();
      properties.put("hibernate.dialect",springEnvironment.getProperty("hibernate.dialect","org.hibernate.dialect.MySQLDialect"));
      properties.put("hibernate.show_sql",springEnvironment.getProperty("hibernate.show_sql","true"));
      properties.put("hibernate.format_sql",springEnvironment.getProperty("hibernate.format_sql","true"));
      properties.put("hibernate.hbm2ddl.auto",springEnvironment.getProperty("hibernate.hbm2ddl.auto","update"));
      return properties;
   }

   @Bean(name = "masterTransactionManager")
   public JpaTransactionManager transactionManager(EntityManagerFactory masterEntityManager) {
      JpaTransactionManager transactionManager = new JpaTransactionManager();
      transactionManager.setEntityManagerFactory(masterEntityManager);
      return transactionManager;
   }
}

TenantDatabaseConfig.java

@Configuration
@EnableTransactionManagement
@ComponentScan("com.appointment.schedular.tenant")
@EnableJpaRepositories(
        entityManagerFactoryRef = "tenantEntityManager",transactionManagerRef = "tenantTransactionManager",basePackages = {"com.appointment.schedular.dao.tenant"})
@PropertySource("classpath:application.properties")
public class TenantDatabaseConfig {

   @Autowired
   private Environment springEnvironment;

   @Bean
   public JpaVendorAdapter jpaVendorAdapter() {
      return new HibernateJpaVendorAdapter();
   }

   @Bean(name = "tenantDataSource")
   public DataSource tenantDataSource() {
      DriverManagerDataSource dataSource = new DriverManagerDataSource();
      dataSource.setDriverClassName(springEnvironment.getProperty("tenant.datasource.classname"));
      dataSource.setUrl(springEnvironment.getProperty("tenant.datasource.url")+"xy" + "?createDatabaseIfNotExist=true");
      dataSource.setUsername(springEnvironment.getProperty("tenant.datasource.user"));
      dataSource.setPassword(springEnvironment.getProperty("tenant.datasource.password"));
      return dataSource;
   }

   @Bean(name = "tenantEntityManager")
   public LocalContainerEntityManagerFactoryBean entityManagerFactory(
                                       MultiTenantConnectionProvider connectionProvider,CurrentTenantIdentifierResolver tenantResolver) {
      LocalContainerEntityManagerFactoryBean emfBean = new LocalContainerEntityManagerFactoryBean();

      emfBean.setDataSource(tenantDataSource());
      emfBean.setPackagesToScan("com.appointment.schedular.model.tenant");
      emfBean.setJpaVendorAdapter(jpaVendorAdapter());
      Map<String,Object> properties = new HashMap<>();
      properties.put(org.hibernate.cfg.Environment.MULTI_TENANT,MultiTenancyStrategy.SCHEMA);
      properties.put(org.hibernate.cfg.Environment.MULTI_TENANT_CONNECTION_PROVIDER,connectionProvider);
      properties.put(org.hibernate.cfg.Environment.MULTI_TENANT_IDENTIFIER_RESOLVER,tenantResolver);
      properties.put("hibernate.ejb.naming_strategy","org.hibernate.cfg.ImprovedNamingStrategy");
        properties.put("hibernate.dialect","update"));
      emfBean.setJpaPropertyMap(properties);
      emfBean.setPersistenceUnitName("master");
      return emfBean;
   }

   @Bean(name = "tenantTransactionManager")
   public JpaTransactionManager transactionManager(EntityManagerFactory tenantEntityManager) {
      JpaTransactionManager transactionManager = new JpaTransactionManager();
      transactionManager.setEntityManagerFactory(tenantEntityManager);
      return transactionManager;
   }
}

MultitenantConnectionProviderImpl.java

@SuppressWarnings("serial")
@Component
@PropertySource("classpath:application.properties")
public class MultiTenantConnectionProviderImpl extends AbstractDataSourceBasedMultiTenantConnectionProviderImpl implements ApplicationListener<ContextRefreshedEvent> {

   @Autowired
   private Environment springEnvironment;

   @Autowired
   private TenantDao tenantDao;

   @Autowired
   @Qualifier("tenantDataSource")
   DataSource masterDataSource;

   /*@Autowired
   @Qualifier("tenantEntityManager")
   EntityManager*/

   private final Map<String,DataSource> map = new HashMap<>();

   @Override
   public void onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent) {
      init();
   }

   private void init() {
      List<Tenant> tenants = tenantDao.findAll();
      for (Tenant tenant : tenants) {
         DataSource genDatasource = constructDataSource(tenant.getTenantKey());
         map.put(tenant.getTenantKey(),genDatasource);

       /*
         LocalContainerEntityManagerFactoryBean entityManagerFactoryBean 
         = new LocalContainerEntityManagerFactoryBean();
         entityManagerFactoryBean.setDataSource(genDatasource);
         entityManagerFactoryBean.setPersistenceProviderClass(HibernatePersistenceProvider.class);
         JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
         entityManagerFactoryBean.setJpaVendorAdapter(vendorAdapter);
         entityManagerFactoryBean.setPackagesToScan(new String[]{"com.appointment.schedular.model.tenant"});

         Map<String,Object> properties = new HashMap<>();
          properties.put("hibernate.ejb.naming_strategy","org.hibernate.cfg.ImprovedNamingStrategy");
            properties.put("hibernate.dialect","org.hibernate.dialect.MySQLDialect"));
          properties.put("hibernate.show_sql","true"));
          properties.put("hibernate.format_sql","true"));
          properties.put("hibernate.hbm2ddl.auto","update"));

         entityManagerFactoryBean.setJpaPropertyMap(properties);
        */ 
      }
   }

   private DataSource constructDataSource(String dbName) {
      DriverManagerDataSource dataSource = new DriverManagerDataSource();
      dataSource.setDriverClassName(springEnvironment.getProperty("tenant.datasource.classname"));
      dataSource.setUrl(springEnvironment.getProperty("tenant.datasource.url") + dbName+ "?createDatabaseIfNotExist=true");
      dataSource.setUsername(springEnvironment.getProperty("tenant.datasource.user"));
      dataSource.setPassword(springEnvironment.getProperty("tenant.datasource.password"));
      try {
         dataSource.getConnection().createStatement().execute("CREATE DATABASE IF NOT EXISTS " + dbName);
      } catch (Exception ex) {
         System.out.println(ex);
      }
      return dataSource;
   }

   @Override
   protected DataSource selectAnyDataSource() {
      return masterDataSource;
   }

   @Override
   protected DataSource selectDataSource(String key) {
      return map.get(key);
   }

   public void addTenant(String tenantKey) {
      map.put(tenantKey,constructDataSource(tenantKey));
   }
}

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