使用Spring Data MongoDB在事务中的两个不同ReactiveMongoRepository中的调用方法？

Question

当将响应式编程模型与Spring Data MongoDB一起使用时，可以像这样执行事务：

Mono<DeleteResult> result = template.inTransaction()                                      
    .execute(action -> action.remove(query(where("id").is("step-1")), Step.class));

但是Spring Data MongoDB也支持“反应性存储库”，例如：

public interface PersonRepository extends ReactiveMongoRepository<Person, String>

  Flux<Person> findByLocationNear(Point location, Distance distance);
}

和

public interface CarRepository extends ReactiveMongoRepository<Car, String>

  Flux<Car> findByYear(int year);
}

我的问题是，假设您有ReactiveMongoRepository，能否以某种方式利用MongoDB事务，例如在同一笔交易中同时插入Person和Car（在这种情况下使用PersonRepository和CarRepository）？如果是这样，您该怎么做？

Answer 1

我也一直在努力寻找Mongo DB和Spring Boot的响应式支持Transactional的解决方案

但是幸运的是我自己想通了。尽管google的一些功能也无济于事，但这些都是无反应的。

您需要将ReactiveMongoTransactionManager与ReactiveMongoDatabaseFactory一起使用，最后大部分细节，也共享相同的代码存储库

为了使mongo数据库支持事务，我们需要确保数据库应以副本方式运行。相同的说明如下：-

使用docker-compose.yml运行基于docker-compose的mongo db服务器，如下所示：-

    version: "3"
    services:
        mongo:
            hostname: mongo
            container_name: localmongo_docker
            image: mongo
            expose:
              - 27017
            ports:
              - 27017:27017
            restart: always
            entrypoint: [ "/usr/bin/mongod", "--bind_ip_all", "--replSet", "rs0" ]
            volumes:
              - ./mongodata:/data/db # need to create a docker volume named as mongodata first

出现图像后，执行命令（这里localmongo_docker是容器的名称）：-

docker exec -it localmongo_docker mongo

复制下面的命令并粘贴并执行

rs.initiate(
   {
     _id : 'rs0',
     members: [
       { _id : 0, host : "mongo:27017" }
     ]
   }
 )

然后通过输入exit]退出执行

重要

-代码仓库可以在我的github上找到-https://github.com/krnbr/mongo-spring-boot-template

该代码的重要说明如下：-

config]包中的MongoConfiguration类是使事务正常运行的重要部分，指向配置类的链接是here
主要部分是Bean

@Bean
ReactiveMongoTransactionManager transactionManager(ReactiveMongoDatabaseFactory dbFactory) {
    return new ReactiveMongoTransactionManager(dbFactory);
}

为了检查代码的Trasactional要求是否正常工作，您可以通过服务包here中的UserService类进行检查

如果链接对某人无效，请共享代码：-

Bean中的配置和内部

@Configuration
public class MongoConfiguration extends AbstractMongoClientConfiguration {

    @Autowired
    private MongoProperties mongoProperties;

    @Bean
    ReactiveMongoTransactionManager transactionManager(ReactiveMongoDatabaseFactory dbFactory) {
        return new ReactiveMongoTransactionManager(dbFactory);
    }

    @Override
    protected String getDatabaseName() {
        return mongoProperties.getDatabase();
    }

    @Override
    public MongoClient mongoClient() {
        return MongoClients.create(mongoProperties.getUri());
    }
}
application.properties（与mongo数据库有关）
spring.data.mongodb.database=mongo
spring.data.mongodb.uri=mongodb://localhost:27017/mongo?replicaSet=rs0
文档类
角色类

@Getter
@Setter
@Accessors(chain = true)
@Document(collection = "roles")
@TypeAlias("role")
public class Role implements Persistable<String> {

    @Id
    private String id;

    @Field("role_name")
    @Indexed(unique = true)
    private String role;

    @CreatedDate
    private ZonedDateTime created;

    @LastModifiedDate
    private ZonedDateTime updated;

    private Boolean deleted;

    private Boolean enabled;

    @Override
    @JsonIgnore
    public boolean isNew() {
        if(getCreated() == null)
            return true;
        else
            return false;
    }
}
用户类别
@Getter
@Setter
@Accessors(chain = true)
@Document(collection = "users")
@JsonInclude(JsonInclude.Include.NON_NULL)
@TypeAlias("user")
public class User implements Persistable<String> {

    @Id()
    private String id;

    @Field("username")
    @Indexed(unique = true)
    @JsonProperty("username")
    private String userName;

    @JsonProperty(access = JsonProperty.Access.WRITE_ONLY)
    private String password;

    @CreatedDate
    private ZonedDateTime created;

    @LastModifiedDate
    private ZonedDateTime updated;

    private Boolean deleted;

    private Boolean enabled;

    @DBRef(lazy = true)
    @JsonProperty("roles")
    private List<Role> roles = new ArrayList();

    @Override
    @JsonIgnore
    public boolean isNew() {
        if(getCreated() == null)
            return true;
        else
            return false;
    }
}
UserProfile类
@Getter
@Setter
@Accessors(chain = true)
@Document(collection = "user_profiles")
@JsonInclude(JsonInclude.Include.NON_NULL)
@TypeAlias("user_profile")
public class UserProfile implements Persistable<String> {

    @Id
    private String id;

    @Indexed(unique = true)
    private String mobile;

    @Indexed(unique = true)
    private String email;

    private String address;

    private String firstName;

    private String lastName;

    @DBRef
    private User user;

    @CreatedDate
    private ZonedDateTime created;

    @LastModifiedDate
    private ZonedDateTime updated;

    private Boolean deleted;

    private Boolean enabled;

    @Override
    @JsonIgnore
    public boolean isNew() {
        if(getCreated() == null)
            return true;
        else
            return false;
    }

}
ReactiveMongoRepository接口（S）>
RoleRepository

public interface RoleRepository extends ReactiveMongoRepository<Role, String> {

    Mono<Role> findByRole(String role);

    Flux<Role> findAllByRoleIn(List<String> roles);

}
UserRepository
public interface UserRepository extends ReactiveMongoRepository<User, String> {

    Mono<User> findByUserName(String userName);

}
UserProfileRepository
public interface UserProfileRepository extends ReactiveMongoRepository<UserProfile, String> {
}
[用户服务类
需要在这里创建您自己的RuntimeException类，这里是AppRuntimeException类，我一直在使用]]@Slf4j
@Service
public class UserService {

    @Autowired
    private RoleRepository roleRepository;

    @Autowired
    private UserRepository userRepository;

    @Autowired
    private UserProfileRepository userProfileRepository;

    @Transactional
    public Mono<UserProfile> saveUserAndItsProfile(final UserRequest userRequest) {

        Mono<Role> roleMono = roleRepository.findByRole("USER");

        Mono<User> userMono = roleMono.flatMap(r -> {
            User user = new User()
                    .setUserName(userRequest.getUsername())
                    .setPassword(userRequest.getPassword());
            user.setRoles(Arrays.asList(r));
            return userRepository.save(user);
        }).onErrorResume(ex -> {
            log.error(ex.getMessage());
            if(ex instanceof DuplicateKeyException) {
                String errorMessage = "The user with the username '"+userRequest.getUsername()+"' already exists";
                log.error(errorMessage);
                return Mono.error(new AppRuntimeException(errorMessage, ErrorCodes.CONFLICT, ex));
            }
            return Mono.error(new AppRuntimeException(ex.getMessage(), ErrorCodes.INTERNAL_SERVER_ERROR, ex));
        });

        Mono<UserProfile> userProfileMono = userMono.flatMap(u -> {
            UserProfile userProfile = new UserProfile()
                    .setAddress(userRequest.getAddress())
                    .setEmail(userRequest.getEmail())
                    .setMobile(userRequest.getMobile())
                    .setUser(u);
            return userProfileRepository.save(userProfile);
        }).onErrorResume(ex -> {
            log.error(ex.getMessage());
            if(ex instanceof DuplicateKeyException) {
                String errorMessage = "The user with the profile mobile'"+userRequest.getMobile()+"' and/or - email '"+userRequest.getEmail()+"' already exists";
                log.error(errorMessage);
                return Mono.error(new AppRuntimeException(errorMessage, ErrorCodes.CONFLICT, ex));
            }
            return Mono.error(new AppRuntimeException(ex.getMessage(), ErrorCodes.INTERNAL_SERVER_ERROR, ex));
        });

        return userProfileMono;

    }

}
控制器和模型类
UserRequest模型类
@Getter
@Setter
@Accessors(chain = true)
@Slf4j
@JsonInclude(JsonInclude.Include.NON_NULL)
public class UserRequest {

    private String username;
    private String password;
    private String mobile;
    private String email;
    private String address;
    private String firstName;
    private String lastName;

}
UserProfileApisController类
@Slf4j
@RestController
@RequestMapping("/apis/user/profile")
public class UserProfileApisController {

    @Autowired
    private UserService userService;

    @PostMapping
    public Mono<UserProfile> saveUserProfile(final @RequestBody UserRequest userRequest) {
        return userService.saveUserAndItsProfile(userRequest);
    }

}

使用Spring Data MongoDB在事务中的两个不同ReactiveMongoRepository中的调用方法？

问题描述投票：1回答：1

1个回答

最新问题

使用Spring Data MongoDB在事务中的两个不同ReactiveMongoRepository中的调用方法？

问题描述 投票：1回答：1

1个回答

最新问题

问题描述投票：1回答：1