21

2026-05-30 10:50:42 +00:00 · 2022-08-09 23:03:13 +06:00
parent faa303f777
commit da2fae3f88
18 changed files with 491 additions and 0 deletions
@@ -0,0 +1,24 @@
+target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/build/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>ru.otus</groupId>
+    <artifactId>spring-21</artifactId>
+    <version>1.0</version>
+
+    <packaging>pom</packaging>
+
+    <modules>
+        <module>spring-21-web-flux</module>
+        <module>spring-21-reactor</module>
+        <module>spring-21-reactive-spring-data</module>
+    </modules>
+</project>
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>ru.otus</groupId>
+    <artifactId>spring-21-reactive-spring-data</artifactId>
+    <version>1.0</version>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.6</version>
+        <relativePath/>
+    </parent>
+
+    <properties>
+        <java.version>11</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-mongodb-reactive</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.mongodb</groupId>
+            <artifactId>mongodb-driver-reactivestreams</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>de.flapdoodle.embed</groupId>
+            <artifactId>de.flapdoodle.embed.mongo</artifactId>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>
@@ -0,0 +1,42 @@
+package ru.otus.spring;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContext;
+import reactor.core.publisher.Flux;
+import ru.otus.spring.domain.Person;
+import ru.otus.spring.repostory.AccountRepository;
+import ru.otus.spring.repostory.PersonRepository;
+
+import java.util.List;
+
+@SpringBootApplication
+public class Main {
+
+    public static void main(String[] args) throws InterruptedException {
+        ApplicationContext context = SpringApplication.run(Main.class);
+
+        PersonRepository repository = context.getBean(PersonRepository.class);
+        AccountRepository accountRepository = context.getBean(AccountRepository.class);
+
+        var persons = List.of(
+                new Person("Pushkin"),
+                new Person("Lermontov"));
+
+        // subscribe блокирует текущий поток и дожидается Flux
+        repository.saveAll(persons)
+                .subscribe();
+
+        // а вот это уже неблокирующий subscribe
+        repository.findAll()
+                .map(Person::getName)
+                .subscribe(System.out::println);
+
+        // Пример объединения двух Flux
+        Flux.merge(repository.findAll(), repository.findAll())
+                .map(Person::getName)
+                .subscribe(System.out::println);
+
+        Thread.sleep(20000);
+    }
+}
@@ -0,0 +1,37 @@
+package ru.otus.spring.domain;
+
+public class Account {
+    private String id;
+    private String personId;
+    private Long amount;
+
+    public Account(String id, String personId, Long amount) {
+        this.id = id;
+        this.personId = personId;
+        this.amount = amount;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getPersonId() {
+        return personId;
+    }
+
+    public void setPersonId(String personId) {
+        this.personId = personId;
+    }
+
+    public Long getAmount() {
+        return amount;
+    }
+
+    public void setAmount(Long amount) {
+        this.amount = amount;
+    }
+}
@@ -0,0 +1,27 @@
+package ru.otus.spring.domain;
+
+public class Person {
+
+    private String id;
+    private String name;
+
+    public Person(String name) {
+        this.name = name;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
@@ -0,0 +1,7 @@
+package ru.otus.spring.repostory;
+
+import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
+import ru.otus.spring.domain.Account;
+
+public interface AccountRepository extends ReactiveMongoRepository<Account, String> {
+}
@@ -0,0 +1,15 @@
+package ru.otus.spring.repostory;
+
+import org.springframework.data.mongodb.repository.Query;
+import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+import ru.otus.spring.domain.Person;
+
+public interface PersonRepository extends ReactiveMongoRepository<Person, String> {
+
+    Flux<Person> findByName(String name);
+
+    @Query("{ 'name': ?0 }")
+    Mono<Person> findFirstByName(String name);
+}
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>ru.otus</groupId>
+    <artifactId>spring-21-reactor</artifactId>
+    <version>1.0</version>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.6.3</version>
+        <relativePath/>
+    </parent>
+
+    <properties>
+        <java.version>11</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.projectreactor</groupId>
+            <artifactId>reactor-core</artifactId>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>
@@ -0,0 +1,20 @@
+package ru.otus.spring;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ConfigurableApplicationContext;
+import ru.otus.spring.reactor.ReactiveProcessingService;
+
+@SpringBootApplication
+public class Main {
+
+    public static void main(String[] args) {
+        ConfigurableApplicationContext context = SpringApplication.run(Main.class);
+
+        ReactiveProcessingService service = context.getBean(ReactiveProcessingService.class);
+
+        service.printHello("Ivan");
+    }
+}
+
+
@@ -0,0 +1,14 @@
+package ru.otus.spring.reactor;
+
+public class Message {
+
+    private final String value;
+
+    public Message(String value) {
+        this.value = value;
+    }
+
+    public String getValue() {
+        return value;
+    }
+}
@@ -0,0 +1,58 @@
+package ru.otus.spring.reactor;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Service;
+import reactor.core.Disposable;
+import reactor.core.publisher.Sinks;
+import ru.otus.spring.service.NonFluxService;
+
+import javax.annotation.PreDestroy;
+
+@Service
+public class ReactiveProcessingService {
+
+    private final Logger logger = LoggerFactory.getLogger(ReactiveProcessingService.class);
+
+    private final Sinks.Many<Message> sink;
+    private final Disposable flow;
+
+    public ReactiveProcessingService(NonFluxService nonFluxService) {
+        // Создаём sink (ранее - процессор)
+        // Это reactor-овская реализация reactive-stream интерфейса
+        // Обрабатывает данные как простой последовательный вызов методов :)
+        sink = Sinks.many().multicast().directBestEffort();
+        // Здесь мы настраиваем flow
+        flow = sink.asFlux()
+                .map(nonFluxService::nonFluxSayHello)
+                .subscribe(this::printMessage);
+        // в идеале в коде выше должен быть doOnNext
+        // в map не предполагаются задержки
+    }
+
+    /**
+     * Этот метод будет инициировать асинхронную обрабтку сообщения
+     *
+     * @param name это имя будет приходить из не-reactor окружения
+     */
+    public void printHello(String name) {
+        sink.tryEmitNext(new Message(name));
+    }
+
+    /**
+     * А это терминальный шаг для сообщения
+     *
+     * @param message а это финальный шаг для сообщения, отсюда можно вернуть рзультат в не-реактив окружение
+     */
+    private void printMessage(Message message) {
+        logger.info("Message received: {}", message.getValue());
+    }
+
+    /**
+     * Просто пример, как остановить процесс
+     */
+    @PreDestroy
+    public void dispose() {
+        this.flow.dispose();
+    }
+}
@@ -0,0 +1,25 @@
+package ru.otus.spring.service;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Service;
+import ru.otus.spring.reactor.Message;
+
+@Service
+public class NonFluxService {
+
+    private final Logger logger = LoggerFactory.getLogger(NonFluxService.class);
+
+    public Message nonFluxSayHello(Message message) {
+        logger.info("Message received in non-flux service: {}", message.getValue());
+
+        String name = message.getValue();
+        String withHello = "Hello, " + name + "!";
+        try {
+            Thread.sleep(1000);
+            return new Message(withHello);
+        } catch (InterruptedException ex) {
+            return new Message(withHello);
+        }
+    }
+}
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>ru.otus</groupId>
+    <artifactId>spring-21-web-flux</artifactId>
+    <version>1.0</version>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.6.3</version>
+        <relativePath/>
+    </parent>
+
+    <properties>
+        <java.version>11</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-webflux</artifactId>
+        </dependency>
+
+        <!--
+            работает и без этой зависимости на Project Reactor,
+            но она нужна для демонстрации RxJava2 контроллера -->
+        <dependency>
+            <groupId>io.reactivex.rxjava2</groupId>
+            <artifactId>rxjava</artifactId>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>
@@ -0,0 +1,14 @@
+package ru.otus.spring;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Main {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Main.class);
+    }
+}
+
+
@@ -0,0 +1,34 @@
+package ru.otus.spring;
+
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+import java.time.Duration;
+
+@RestController
+public class ReactorController {
+
+    @GetMapping("/flux/one")
+    public Mono<String> one() {
+        return Mono.just("one");
+    }
+
+    @GetMapping("/flux/ten")
+    public Flux<Integer> list() {
+        return repository.findAll()
+            .map();
+    }
+
+    @GetMapping(path = "/flux/stream", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
+    public Flux<String> stream() {
+        return Flux.generate(() -> 0, (state, emitter) -> {
+            emitter.next(state);
+            return state + 1;
+        })
+                .delayElements(Duration.ofSeconds(1L))
+                .map(Object::toString);
+    }
+}
@@ -0,0 +1,20 @@
+package ru.otus.spring;
+
+import io.reactivex.Flowable;
+import io.reactivex.Single;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class RxJava2Controller {
+
+    @GetMapping("/rx/one")
+    public Single<String> single() {
+        return Single.just("one");
+    }
+
+    @GetMapping("/rx/ten")
+    public Flowable<Integer> list() {
+        return Flowable.range(1, 10);
+    }
+}