Package cn.fantasticmao.mundo.data.jdbc

Annotation Type RoutingSeed

@Target({PARAMETER,METHOD,TYPE,FIELD})
@Retention(RUNTIME)
@Documented
public @interface RoutingSeed

Annotation to declare the DataSource route seed. Used on domain type fields, method parameters, method and interface declarations of Spring-Data Repositories.

With ShardingByMod Strategy, this annotation can be used to implement database sharding. For example:

 @Entity
 @Table(name = "t_user")
 public class User {
     @Id
     @RoutingSeed
     private Integer id;
     private String name;

     // ......
 }

 public interface UserRepository extends CrudRepository<User, Integer> {
     @Override
     User save(User user);

     @Override
     Optional<User> findById(@RoutingSeed Integer id);
 }
 

With MultiTenant Strategy, this annotation can be used to implement the multi-tenant database pattern. For example:

 @Entity
 @Table(name = "t_employee")
 public class Employee {
     @Id
     private Integer id;
     private String name;

     // ......
 }

 public interface EmployeeRepository extends CrudRepository<Employee, Integer> {
     String DEPARTMENT_SALE = "sale";
     String DEPARTMENT_TECH = "tech";

     @RoutingSeed(DEPARTMENT_SALE)
     @Query(value = "SELECT * FROM t_employee WHERE id = ?1", nativeQuery = true)
     Employee findByIdInSale(Integer id);

     @RoutingSeed(DEPARTMENT_TECH)
     @Query(value = "SELECT * FROM t_employee WHERE id = ?1", nativeQuery = true)
     Employee findByIdInTech(Integer id);
 }
 

Since:

2022-08-17

Version:

1.0.6

Author:

fantasticmao

See Also:

RoutingDataSource, RoutingSeedContext, RoutingSeedExtractor, RoutingStrategy

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element	Description
String	value	Set the route seed directly, only works on method and interface declarations.

Element Detail

value

String value

Set the route seed directly, only works on method and interface declarations.

Returns:

seed value that has been set

Default:

""