详解基于MybatisPlus两步实现多租户方案
1.定义一个TenantLineHandler的实现类:
import com.baomidou.mybatisplus.extension.plugins.handler.TenantLineHandler; import com.google.common.collect.Lists; import net.sf.jsqlparser.expression.Expression; import net.sf.jsqlparser.expression.LongValue; import java.util.List; /** * 多租户处理插件 * * @author 向振华 * @date 2021/04/26 13:37 */ public class CustomTenantLineHandler implements TenantLineHandler { /** * 忽略添加租户ID的表 */ private final static List<String> IGNORE_TABLE_NAMES = Lists.newArrayList( "t_country", "t_language" ); /** * 获取租户ID值表达式(可从cookie、token、缓存中取) * * @return */ @Override public Expression getTenantId() { return new LongValue(1L); } /** * 获取租户字段名(数据库的租户ID字段名) * * @return */ @Override public String getTenantIdColumn() { return "tenant_id"; } /** * 根据表名判断是否忽略拼接多租户条件 * * @param tableName * @return */ @Override public boolean ignoreTable(String tableName) { return IGNORE_TABLE_NAMES.contains(tableName); } }
2.定义MybatisPlusConfig配置类将多租户插件生效:
import com.baomidou.mybatisplus.annotation.DbType; import com.baomidou.mybatisplus.autoconfigure.ConfigurationCustomizer; import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor; import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor; import com.baomidou.mybatisplus.extension.plugins.inner.TenantLineInnerInterceptor; import com.bzcst.bop.component.mybatis.config.handler.AutoFillMetaObjectHandler; import com.bzcst.bop.component.mybatis.config.handler.CustomTenantLineHandler; import org.mybatis.spring.annotation.MapperScan; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; /** * @author 向振华 * @date 2021/04/26 14:45 */ @Configuration @MapperScan("scan.your.mapper.package") public class MybatisPlusConfig { @Bean public MybatisPlusInterceptor mybatisPlusInterceptor() { MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor(); // 多租户插件(注意:这个一定要放在最上面) interceptor.addInnerInterceptor(new TenantLineInnerInterceptor(new CustomTenantLineHandler())); // 分页插件 interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL)); return interceptor; } @Bean public ConfigurationCustomizer configurationCustomizer() { return configuration -> configuration.setUseDeprecatedExecutor(false); } @Bean public AutoFillMetaObjectHandler fillMetaObjectHandler() { return new AutoFillMetaObjectHandler(); } }
测试
@Test public void select() { Role role = roleService.getById(40L); System.out.println(role); }
Creating a new SqlSession SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2fedfff1] was not registered for synchronization because synchronization is not active Original SQL: SELECT id,tenant_id,frame_id,name,type,description,meta_created,meta_updated,meta_logic_flag FROM t_sec_role WHERE id=? parser sql: SELECT id, tenant_id, frame_id, name, type, description, meta_created, meta_updated, meta_logic_flag FROM t_sec_role WHERE id = ? AND tenant_id = 1 2021-04-26 14:58:55.534 INFO 24980 --- [ main] com.zaxxer.hikari.HikariDataSource : DatebookHikariCP - Starting... 2021-04-26 14:58:55.903 INFO 24980 --- [ main] com.zaxxer.hikari.HikariDataSource : DatebookHikariCP - Start completed. JDBC Connection [HikariProxyConnection@1100660981 wrapping com.mysql.cj.jdbc.ConnectionImpl@628fa8ea] will not be managed by Spring ==> Preparing: SELECT id, tenant_id, frame_id, name, type, description, meta_created, meta_updated, meta_logic_flag FROM t_sec_role WHERE id = ? AND tenant_id = 1 ==> Parameters: 40(Long) <== Columns: id, tenant_id, frame_id, name, type, description, meta_created, meta_updated, meta_logic_flag <== Row: 40, 1, 123, 一个角色啊, 2, haha, 2021-04-26 14:07:42, 2021-04-26 14:07:42, 1 <== Total: 1 Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2fedfff1] Role(id=40, sasTenantId=1, orgFrameId=123, name=一个角色啊, type=2, description=haha, metaCreated=Mon Apr 26 14:07:42 CST 2021, metaUpdated=Mon Apr 26 14:07:42 CST 2021, metaLogicFlag=1)
可以看到查询语句后面拼接了tenant_id = 1
==> Preparing: SELECT id, tenant_id, frame_id, name, type, description, meta_created, meta_updated, meta_logic_flag FROM t_sec_role WHERE id = ? AND tenant_id = 1
注意:如果表中没有定义tenant_id会报错,不需要添加多租户的表配置到CustomTenantLineHandler 中的IGNORE_TABLE_NAMES集合中
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