MyBatis Micronaut Adapter
Micronaut-MyBatis adapter is an easy-to-use Micronaut bridge for MyBatis sql mapping framework.
Disclaimer
This is a very basic version, which has a lot to cover. Right now only Java api is supported. See tests for examples.
Essentials
Declare your regular mybatis mapper, like this:
@Mapper
public interface UserMapper {
@Select("select * from users order by id")
List<User> getUsers();
@Select("select * from users where id=#{value}")
User getUser(String userId);
@Insert("insert into users VALUES (#{id}, #{name})")
void insert(User user);
}
Notice the @Mapper
annotation - it declares your mapper as a @Singleton
so that you able to inject this later on in your service:
@Singleton
public class FooService {
private final UserMapper userMapper;
public FooService(UserMapper userMapper) {
this.userMapper = userMapper;
}
public User doSomeBusinessStuff(String userId) {
return this.userMapper.getUser(userId);
}
}
Thats it! Micronaut-mybatis will take care of instantiating SqlSessionFactory, creating a new session and using it to call your mapper.
Every mapper call is made in a single transaction, so, if you want to make multiple calls withing transaction, just declare a default method in your mapper:
@Mapper
public interface UserMapper {
@Select("select * from users order by id")
List<User> getUsers();
@Select("select * from users where id=#{value}")
User getUser(String userId);
@Insert("insert into users VALUES (#{id}, #{name})")
void insert(User user);
default User insertAndSelect(User user) {
insert(user);
return getUser(user.getId());
}
}