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[英]Multi-tenancy in Spring Boot + Hibernate5 - Schema per tenant
[英]Multi-tenancy using single database multiple schema with Hibernate and Spring Boot saving data to wrong schema
我正在尝试使用数据为我的多租户(单个数据库、多个模式)系统播种,但遇到了一个问题,当我对单个数据库使用相同的代码时,该问题不存在。 我完全期望在我的研究过程中我错过了一些明显的东西。
每个模式都将包含完全相同的表结构。
这是我的租户上下文
public class TenantContext {
public static final String DEFAULT_TENANT_IDENTIFIER = "public";
private static final ThreadLocal<String> TENANT_IDENTIFIER = new ThreadLocal<>();
public static void setTenant(String tenantIdentifier) {
TENANT_IDENTIFIER.set(tenantIdentifier);
}
public static void reset(String tenantIdentifier) {
TENANT_IDENTIFIER.remove();
}
@Component
public static class TenantIdentifierResolver implements CurrentTenantIdentifierResolver {
@Override
public String resolveCurrentTenantIdentifier() {
String currentTenantId = TENANT_IDENTIFIER.get();
return currentTenantId != null ?
currentTenantId :
DEFAULT_TENANT_IDENTIFIER;
}
@Override
public boolean validateExistingCurrentSessions() {
return false;
}
}
}
还有我的 HibernateConfig
@Configuration
public class HibernateConfig {
@Autowired
private JpaProperties jpaProperties;
@Bean
public JpaVendorAdapter jpaVendorAdapter() {
return new HibernateJpaVendorAdapter();
}
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource,
MultiTenantConnectionProvider multiTenantConnectionProvider, CurrentTenantIdentifierResolver currentTenantIdentifierResolver) {
Map<String, Object> jpaPropertiesMap = new HashMap<>();
jpaPropertiesMap.putAll(jpaProperties.getProperties());
jpaPropertiesMap.put(Environment.MULTI_TENANT, MultiTenancyStrategy.SCHEMA);
jpaPropertiesMap.put(Environment.MULTI_TENANT_CONNECTION_PROVIDER, multiTenantConnectionProvider);
jpaPropertiesMap.put(Environment.MULTI_TENANT_IDENTIFIER_RESOLVER, TenantContext.TenantIdentifierResolver.class);
LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
entityManagerFactoryBean.setDataSource(dataSource);
entityManagerFactoryBean.setPackagesToScan(UppStudentAppBeApplication.class.getPackage().getName());
entityManagerFactoryBean.setJpaVendorAdapter(jpaVendorAdapter());
entityManagerFactoryBean.setJpaPropertyMap(jpaPropertiesMap);
return entityManagerFactoryBean;
}
}
还有我的 TenantConenctionProvider
@Component
public class TenantConnectionProvider implements MultiTenantConnectionProvider {
private static Logger logger = LoggerFactory.getLogger(TenantConnectionProvider.class);
@Autowired
private DataSource dataSource;
public TenantConnectionProvider(DataSource dataSource) {
this.dataSource = dataSource;
}
@Override
public Connection getAnyConnection() throws SQLException {
return dataSource.getConnection();
}
@Override
public void releaseAnyConnection(Connection connection) throws SQLException {
connection.close();
}
@Override
public Connection getConnection(String tenantIdentifier) throws SQLException {
logger.info("Get connection for tenant " + String.join(":", tenantIdentifier ));
final Connection connection = getAnyConnection();
try {
//connection.createStatement().execute( String.format("SET SCHEMA \"%s\";", tenantIdentifier));
connection.setSchema(tenantIdentifier);
} catch ( SQLException e ) {
throw new HibernateException(
"Could not alter JDBC connection to specified schema [" +
tenantIdentifier + "]",
e
);
}
return connection;
}
@Override
public void releaseConnection(String tenantIdentifier, Connection connection) throws SQLException {
try {
//connection.createStatement().execute( String.format("SET SCHEMA \"%s\";", TenantContext.DEFAULT_TENANT_IDENTIFIER) );
connection.setSchema(TenantContext.DEFAULT_TENANT_IDENTIFIER);
} catch ( SQLException e ) {
throw new HibernateException(
"Could not alter JDBC connection to specified schema [" +
tenantIdentifier + "]",
e
);
}
releaseAnyConnection(connection);
}
@Override
public boolean supportsAggressiveRelease() {
return false;
}
@Override
public boolean isUnwrappableAs(Class unwrapType) {
return false;
}
@Override
public <T> T unwrap(Class<T> unwrapType) {
return null;
}
}
我将我的种子称为 class,它使用 flyway 迁移构建了我的租户和模式。
然后我尝试遍历保存的租户切换 TenantContext。 当调试似乎起作用时。 但是,当我尝试对 repo 做任何事情时,我收到以下错误。
ohengine.jdbc.spi.SqlExceptionHelper: 错误: 列 Campus0_.createdat 不存在
提示:也许您的意思是引用列“campus0_.created_at”。
Position:32
正如我之前所说,当它是单个数据库和模式时,它以前工作得很好。 我不是 100% 确定我哪里出错了。 我应该如何注册模式? 如果是这样,我如何在不重新部署的情况下加入新租户? 我应该在这个阶段使用使用 repo 中的模式的自定义查询吗?
提前感谢您的任何帮助或建议。
编辑 1所以我现在通过检查 hibernate 属性克服了我最初的障碍,因此通过如下更改 hibernate 配置
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource,
MultiTenantConnectionProvider multiTenantConnectionProvider,
HibernateProperties hibernateProperties) {
Map<String, Object> jpaPropertiesMap = hibernateProperties.determineHibernateProperties(jpaProperties.getProperties(), new HibernateSettings());
//jpaPropertiesMap.putAll(jpaProperties.getProperties());
jpaPropertiesMap.put(Environment.MULTI_TENANT, MultiTenancyStrategy.SCHEMA);
jpaPropertiesMap.put(Environment.MULTI_TENANT_CONNECTION_PROVIDER, multiTenantConnectionProvider);
jpaPropertiesMap.put(Environment.MULTI_TENANT_IDENTIFIER_RESOLVER, TenantContext.TenantIdentifierResolver.class);
LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
entityManagerFactoryBean.setDataSource(dataSource);
entityManagerFactoryBean.setPackagesToScan(UppStudentAppBeApplication.class.getPackage().getName());
entityManagerFactoryBean.setJpaVendorAdapter(jpaVendorAdapter());
entityManagerFactoryBean.setJpaPropertyMap(jpaPropertiesMap);
return entityManagerFactoryBean;
}
这现在已经消除了上述命名错误。 但是现在它保存到我的默认架构而不是 TenantIdentifierResolver 中设置的架构。
你实现AsyncHandlerInterceptor
- Spring 的拦截器。 也应该在WebMvcConfigurer
中注册。
@Component
public class TenantRequestInterceptor implements AsyncHandlerInterceptor{
private SecurityDomain securityDomain;
public TenantRequestInterceptor(SecurityDomain securityDomain) {
this.securityDomain = securityDomain;
}
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
return Optional.ofNullable(request)
.map(req -> securityDomain.getTenantIdFromJwt(req))
.map(tenant -> setTenantContext(tenant))
.orElse(false);
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {
TenantContext.reset();
}
private boolean setTenantContext(String tenant) {
TenantContext.setCurrentTenant(tenant);
return true;
}
}
这很重要,因为在这里您使用租户填充 TenantContext。 您是否调试过方法getConnection(String tenantIdentifier)
作为tenantIdentifier 的值是什么?
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