{"id":10006415,"date":"2022-09-06T21:42:33","date_gmt":"2022-09-06T13:42:33","guid":{"rendered":"https:\/\/ityet.com\/?p=10006415"},"modified":"2022-09-06T21:42:33","modified_gmt":"2022-09-06T13:42:33","slug":"%e6%89%8b%e6%8a%8a%e6%89%8b%e6%95%99%e4%bd%a0-spring-boot-%e6%95%b4%e5%90%88-reactor","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006415","title":{"rendered":"\u624b\u628a\u624b\u6559\u4f60 Spring Boot \u6574\u5408 Reactor"},"content":{"rendered":"

Reactor \u662f\u4e00\u4e2a\u5b8c\u5168\u975e\u963b\u585e<\/strong>\u7684 JVM \u54cd\u5e94\u5f0f<\/strong>\u7f16\u7a0b\u57fa\u7840\uff0c\u6709\u7740\u9ad8\u6548\u7684\u9700\u6c42\u7ba1\u7406\uff08\u80cc\u538b\u7684\u5f62\u5f0f\uff09\u3002\u5b83\u76f4\u63a5\u6574\u5408 Java8 \u7684\u51fd\u6570\u5f0f API\uff0c\u5c24\u5176\u662f CompletableFuture<\/code>\uff0c Stream<\/code>\uff0c\u8fd8\u6709 Duration<\/code> \u3002\u63d0\u4f9b\u4e86\u53ef\u7ec4\u5408\u7684\u5f02\u6b65\u5316\u5e8f\u5217 API\u2009\u2014\u2009Flux (\u5bf9\u4e8e [N] \u4e2a\u5143\u7d20) and Mono (\u5bf9\u4e8e [0|1] \u5143\u7d20)\u2009\u2014\u2009\u5e76\u5e7f\u6cdb\u5b9e\u73b0 \u54cd\u5e94\u5f0fStream \u89c4\u8303\u3002<\/p><\/blockquote>\n

\u8fd9\u6b21\u5e26\u5927\u5bb6\u4ece\u96f6\u5f00\u59cb\uff0c\u4f7f\u7528 Spring Boot \u6846\u67b6\u5efa\u7acb\u4e00\u4e2a Reactor \u54cd\u5e94\u5f0f\u9879\u76ee\u3002<\/p>\n

1 \u521b\u5efa\u9879\u76ee<\/h2>\n

\u4f7f\u7528 https:\/\/start.spring.io\/<\/a> \u521b\u5efa\u9879\u76ee\u3002\u6dfb\u52a0\u4f9d\u8d56\u9879\uff1aH2\u3001Lombok\u3001Spring Web\u3001JPA\u3001JDBC<\/p>\n

\"\"<\/p>\n

\u7136\u540e\u5bfc\u5165 Reactor<\/code> \u5305<\/p>\n

<dependency>\n    <groupId>io.projectreactor<\/groupId>\n    <artifactId>reactor-core<\/artifactId>\n<\/dependency>\n<dependency>\n    <groupId>io.projectreactor<\/groupId>\n    <artifactId>reactor-test<\/artifactId>\n    <scope>test<\/scope>\n<\/dependency><\/code><\/pre>\n
2 \u96c6\u6210 H2 \u6570\u636e\u5e93<\/h2>\n
application.properties<\/code> \u6587\u4ef6\u4e2d\u6dfb\u52a0 H2<\/code> \u6570\u636e\u8fde\u63a5\u4fe1\u606f\u3002\u6b64\u5916\uff0c\u7aef\u53e3\u4f7f\u7528 8081\uff08\u968f\u610f\uff0c\u672c\u5730\u672a\u88ab\u4f7f\u7528\u7684\u7aef\u53e3\u5373\u53ef\uff09\u3002<\/p>\n
server.port=8081\n################ H2 \u6570\u636e\u5e93 \u57fa\u7840\u914d\u7f6e ##############\nspring.datasource.driverClassName=org.h2.Driver\nspring.datasource.url=jdbc:h2:~\/user\nspring.datasource.username=sa\nspring.datasource.password=\n\nspring.jpa.database=h2\nspring.jpa.hibernate.ddl-auto=update\nspring.h2.console.path=\/h2-console\nspring.h2.console.enable=true<\/code><\/pre>\n
3 \u521b\u5efa\u6d4b\u8bd5\u7c7b<\/h2>\n
3.1 user \u5b9e\u4f53<\/h3>\n
\u5efa\u7acb\u7b80\u5355\u6570\u636e\u64cd\u4f5c\u5b9e\u4f53 User\u3002<\/p>\n
import lombok.Data;\nimport lombok.NoArgsConstructor;\n\nimport javax.persistence.*;\n\n\/**\n * @Author: prepared\n * @Date: 2022\/8\/29 21:40\n *\/\n@Data\n@NoArgsConstructor\n@Table(name = "t_user")\n@Entity\npublic class User {\n\n    @Id\n    @GeneratedValue(strategy = GenerationType.AUTO)\n    private Long id;\n\n    private String userName;\n\n    private int age;\n\n    private String sex;\n\n    public User(String userName, int age, String sex) {\n        this.userName = userName;\n        this.age = age;\n        this.sex = sex;\n    }\n}<\/code><\/pre>\n
3.2 UserRepository<\/h3>\n
\u6570\u636e\u6a21\u578b\u5c42\u4f7f\u7528 JPA<\/code> \u6846\u67b6\u3002<\/p>\n
import com.prepared.user.domain.User;\nimport org.springframework.data.jpa.repository.JpaRepository;\nimport org.springframework.stereotype.Repository;\n\n\/**\n * @Author: prepared\n * @Date: 2022\/8\/29 21:45\n *\/\n@Repository\npublic interface UserRepository extends JpaRepository<User, Long> {\n}<\/code><\/pre>\n
3.3 UserService<\/h3>\n
service \u589e\u52a0\u4e24\u4e2a\u65b9\u6cd5\uff0cadd \u65b9\u6cd5\uff0c\u7528\u6765\u6dfb\u52a0\u6570\u636e\uff1blist \u65b9\u6cd5\uff0c\u7528\u6765\u67e5\u8be2\u6240\u6709\u6570\u636e\u3002\u6240\u6709\u63a5\u53e3\u8fd4\u56de Mono\/Flux \u5bf9\u8c61\u3002<\/p>\n
\u6700\u4f73\u5b9e\u8df5\uff1a\u6240\u6709\u7684\u7b2c\u4e09\u65b9\u63a5\u53e3\u3001IO \u8017\u65f6\u6bd4\u8f83\u957f\u7684\u64cd\u4f5c\u90fd\u53ef\u4ee5\u653e\u5728 Mono \u5bf9\u8c61\u4e2d\u3002<\/p>\n
doOnError<\/code> \u76d1\u63a7\u5f02\u5e38\u60c5\u51b5\uff1b<\/p>\n
doFinally<\/code> \u76d1\u63a7\u6574\u4f53\u6267\u884c\u60c5\u51b5\uff0c\u5982\uff1a\u8017\u65f6\u3001\u8c03\u7528\u91cf\u76d1\u63a7\u7b49\u3002<\/p>\n
import com.prepared.user.dao.UserRepository;\nimport com.prepared.user.domain.User;\nimport org.slf4j.Logger;\nimport org.slf4j.LoggerFactory;\nimport org.springframework.stereotype.Service;\nimport reactor.core.publisher.Mono;\n\nimport javax.annotation.Resource;\nimport java.util.List;\n\n\/**\n * @Author: prepared\n * @Date: 2022\/8\/29 21:45\n *\/\n@Service\npublic class UserService {\n\n    private Logger logger = LoggerFactory.getLogger(UserService.class);\n\n    @Resource\n    private UserRepository userRepository;\n\n    public Mono<Boolean> save(User user) {\n        long startTime = System.currentTimeMillis();\n        return Mono.fromSupplier(() -> {\n                    return userRepository.save(user) != null;\n                })\n                .doOnError(e -> {\n                    \/\/ \u6253\u5370\u5f02\u5e38\u65e5\u5fd7&\u589e\u52a0\u76d1\u63a7\uff08\u81ea\u884c\u5904\u7406\uff09\n                    logger.error("save.user.error, user={}, e", user, e);\n                })\n                .doFinally(e -> {\n                    \/\/ \u8017\u65f6 & \u6574\u4f53\u5065\u5eb7\n                    logger.info("save.user.time={}, user={}", user, System.currentTimeMillis() - startTime);\n                });\n    }\n\n    public Mono<User> findById(Long id) {\n        long startTime = System.currentTimeMillis();\n        return Mono.fromSupplier(() -> {\n                    return userRepository.getReferenceById(id);\n                }).doOnError(e -> {\n                    \/\/ \u6253\u5370\u5f02\u5e38\u65e5\u5fd7&\u589e\u52a0\u76d1\u63a7\uff08\u81ea\u884c\u5904\u7406\uff09\n                    logger.error("findById.user.error, id={}, e", id, e);\n                })\n                .doFinally(e -> {\n                    \/\/ \u8017\u65f6 & \u6574\u4f53\u5065\u5eb7\n                    logger.info("findById.user.time={}, id={}", id, System.currentTimeMillis() - startTime);\n                });\n    }\n\n    public Mono<List<User>> list() {\n        long startTime = System.currentTimeMillis();\n        return Mono.fromSupplier(() -> {\n                    return userRepository.findAll();\n                }).doOnError(e -> {\n                    \/\/ \u6253\u5370\u5f02\u5e38\u65e5\u5fd7&\u589e\u52a0\u76d1\u63a7\uff08\u81ea\u884c\u5904\u7406\uff09\n                    logger.error("list.user.error, e", e);\n                })\n                .doFinally(e -> {\n                    \/\/ \u8017\u65f6 & \u6574\u4f53\u5065\u5eb7\n                    logger.info("list.user.time={}, ", System.currentTimeMillis() - startTime);\n                });\n    }\n  \n  public Flux<User> listFlux() {\n        long startTime = System.currentTimeMillis();\n        return Flux.fromIterable(userRepository.findAll())\n                .doOnError(e -> {\n                    \/\/ \u6253\u5370\u5f02\u5e38\u65e5\u5fd7&\u589e\u52a0\u76d1\u63a7\uff08\u81ea\u884c\u5904\u7406\uff09\n                    logger.error("list.user.error, e", e);\n                })\n                .doFinally(e -> {\n                    \/\/ \u8017\u65f6 & \u6574\u4f53\u5065\u5eb7\n                    logger.info("list.user.time={}, ", System.currentTimeMillis() - startTime);\n                });\n    }\n}\n<\/code><\/pre>\n
3.4 UserController<\/h3>\n
controller<\/code> \u589e\u52a0\u4e24\u4e2a\u65b9\u6cd5\uff0cadd \u65b9\u6cd5\uff0c\u7528\u6765\u6dfb\u52a0\u6570\u636e\uff1blist \u65b9\u6cd5\uff0c\u7528\u6765\u67e5\u8be2\u6240\u6709\u6570\u636e\u3002<\/p>\n
list \u65b9\u6cd5\u8fd8\u6709\u53e6\u5916\u4e00\u79cd\u5199\u6cd5\uff0c\u8fd9\u5c31\u6d89\u53ca\u5230 Mono \u548c Flux \u7684\u4e0d\u540c\u4e86\u3002<\/p>\n
\u8fd4\u56deList<\/code>\u53ef\u4ee5\u4f7f\u7528Mono<List<User>><\/code> \uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528 Flux<User><\/code>\u3002<\/p>\n