Примеры к занятию 28

2026-05-30 10:50:42 +00:00 · 2020-12-09 18:59:33 +03:00
parent 99203bb546
commit dbe60af08e
14 changed files with 404 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 +1,17 @@
+<?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-28</artifactId>
+    <version>1.0</version>
+
+    <packaging>pom</packaging>
+
+    <modules>
+        <module>spring-28-exercise</module>
+        <module>spring-28-solution</module>
+    </modules>
+</project>
@@ -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-28-exercise</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.2.6.RELEASE</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-integration</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-messaging</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>3.7</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>
@@ -0,0 +1,70 @@
+package ru.otus.spring.integration;
+
+import org.apache.commons.lang3.RandomUtils;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.support.AbstractApplicationContext;
+import org.springframework.integration.annotation.IntegrationComponentScan;
+
+import org.springframework.integration.channel.PublishSubscribeChannel;
+import org.springframework.integration.channel.QueueChannel;
+import org.springframework.integration.config.EnableIntegration;
+import org.springframework.integration.dsl.IntegrationFlow;
+import org.springframework.integration.dsl.IntegrationFlows;
+
+import org.springframework.integration.dsl.MessageChannels;
+import ru.otus.spring.integration.domain.Food;
+import ru.otus.spring.integration.domain.OrderItem;
+
+
+@IntegrationComponentScan
+@SuppressWarnings({"resource", "Duplicates", "InfiniteLoopStatement"})
+@ComponentScan
+@Configuration
+@EnableIntegration
+public class App {
+    private static final String[] MENU = {"coffee", "tea", "smoothie", "whiskey", "beer", "cola", "water"};
+
+    @Bean
+    public QueueChannel itemsChannel() {
+        return MessageChannels.queue(10).get();
+    }
+
+    @Bean
+    public PublishSubscribeChannel foodChannel() {
+        return MessageChannels.publishSubscribe().get();
+    }
+
+    // TODO: create default poller
+
+    @Bean
+    public IntegrationFlow cafeFlow() {
+        return IntegrationFlows.from("itemsChannel")
+                // TODO: cook OrderItem in the kitchen
+                // TODO*: add splitter and aggregator
+                // TODO: forward it to the publish subscriber channel
+                .get();
+    }
+
+    public static void main(String[] args) throws Exception {
+        AbstractApplicationContext ctx = new AnnotationConfigApplicationContext(App.class);
+
+        // here we works with cafe using interface
+        Cafe cafe = ctx.getBean(Cafe.class);
+
+        while (true) {
+            Thread.sleep(1000);
+
+            OrderItem orderItem = generateOrderItem();
+            System.out.println("New orderItem: " + orderItem.getItemName());
+            Food food = cafe.process(orderItem);
+            System.out.println("Ready food: " + food.getName());
+        }
+    }
+
+    private static OrderItem generateOrderItem() {
+        return new OrderItem(MENU[RandomUtils.nextInt(0, MENU.length)]);
+    }
+}
@@ -0,0 +1,12 @@
+package ru.otus.spring.integration;
+
+
+import ru.otus.spring.integration.domain.Food;
+import ru.otus.spring.integration.domain.OrderItem;
+
+// TODO: add messaging gateway annotation
+public interface Cafe {
+
+    // TODO: add gateway annotation with required channels
+    Food process(OrderItem orderItem);
+}
@@ -0,0 +1,15 @@
+package ru.otus.spring.integration.domain;
+
+
+public class Food {
+
+    private final String name;
+
+    public Food(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+}
@@ -0,0 +1,14 @@
+package ru.otus.spring.integration.domain;
+
+public class OrderItem {
+
+    private final String itemName;
+
+    public OrderItem(String itemName) {
+        this.itemName = itemName;
+    }
+
+    public String getItemName() {
+        return itemName;
+    }
+}
@@ -0,0 +1,16 @@
+package ru.otus.spring.integration.kitchen;
+
+import org.springframework.stereotype.Service;
+import ru.otus.spring.integration.domain.Food;
+import ru.otus.spring.integration.domain.OrderItem;
+
+@Service
+public class KitchenService {
+
+    public Food cook(OrderItem orderItem) throws Exception {
+        System.out.println("Cooking " + orderItem.getItemName());
+        Thread.sleep(3000);
+        System.out.println("Cooking " + orderItem.getItemName() + " done");
+        return new Food(orderItem.getItemName());
+    }
+}
@@ -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-28-solution</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.2.6.RELEASE</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-integration</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-messaging</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>3.7</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>
@@ -0,0 +1,93 @@
+package ru.otus.spring.integration;
+
+import org.apache.commons.lang3.RandomUtils;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.support.AbstractApplicationContext;
+import org.springframework.integration.annotation.IntegrationComponentScan;
+import org.springframework.integration.channel.DirectChannel;
+import org.springframework.integration.channel.PublishSubscribeChannel;
+import org.springframework.integration.channel.QueueChannel;
+import org.springframework.integration.config.EnableIntegration;
+import org.springframework.integration.dsl.IntegrationFlow;
+import org.springframework.integration.dsl.IntegrationFlows;
+import org.springframework.integration.dsl.MessageChannels;
+import org.springframework.integration.dsl.Pollers;
+
+import org.springframework.integration.scheduling.PollerMetadata;
+import ru.otus.spring.integration.domain.Food;
+import ru.otus.spring.integration.domain.OrderItem;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.stream.Collectors;
+
+
+@IntegrationComponentScan
+@SuppressWarnings({"resource", "Duplicates", "InfiniteLoopStatement"})
+@ComponentScan
+@Configuration
+@EnableIntegration
+public class App {
+    private static final String[] MENU = {"coffee", "tea", "smoothie", "whiskey", "beer", "cola", "water"};
+
+    @Bean
+    public QueueChannel itemsChannel() {
+        return MessageChannels.queue(10).get();
+    }
+
+    @Bean
+    public PublishSubscribeChannel foodChannel() {
+        return MessageChannels.publishSubscribe().get();
+    }
+
+    @Bean (name = PollerMetadata.DEFAULT_POLLER )
+    public PollerMetadata poller () {
+        return Pollers.fixedRate(100).maxMessagesPerPoll(2).get() ;
+    }
+
+    @Bean
+    public IntegrationFlow cafeFlow() {
+        return IntegrationFlows.from("itemsChannel")
+                .split()
+                .handle("kitchenService", "cook")
+                .aggregate()
+                .channel("foodChannel")
+                .get();
+    }
+
+    public static void main(String[] args) throws Exception {
+        AbstractApplicationContext ctx = new AnnotationConfigApplicationContext(App.class);
+
+        // here we works with cafe using interface
+        Cafe cafe = ctx.getBean(Cafe.class);
+
+        while (true) {
+            Thread.sleep(1000);
+
+            Collection<OrderItem> items = generateOrderItems();
+            System.out.println("New orderItems: " +
+                    items.stream().map(OrderItem::getItemName)
+                            .collect(Collectors.joining(",")));
+            Collection<Food> food = cafe.process(items);
+            System.out.println("Ready food: " + food.stream()
+                    .map(Food::getName)
+                    .collect(Collectors.joining(",")));
+        }
+    }
+
+    private static OrderItem generateOrderItem() {
+        return new OrderItem(MENU[RandomUtils.nextInt(0, MENU.length)]);
+    }
+
+    private static Collection<OrderItem> generateOrderItems() {
+        List<OrderItem> items = new ArrayList<>();
+        for (int i = 0; i < RandomUtils.nextInt(1, 5); ++i) {
+            items.add(generateOrderItem());
+        }
+        return items;
+    }
+}
@@ -0,0 +1,16 @@
+package ru.otus.spring.integration;
+
+
+import org.springframework.integration.annotation.Gateway;
+import org.springframework.integration.annotation.MessagingGateway;
+import ru.otus.spring.integration.domain.Food;
+import ru.otus.spring.integration.domain.OrderItem;
+
+import java.util.Collection;
+
+@MessagingGateway
+public interface Cafe {
+
+    @Gateway(requestChannel = "itemsChannel", replyChannel = "foodChannel")
+    Collection<Food> process(Collection<OrderItem> orderItem);
+}
@@ -0,0 +1,15 @@
+package ru.otus.spring.integration.domain;
+
+
+public class Food {
+
+    private final String name;
+
+    public Food(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+}
@@ -0,0 +1,14 @@
+package ru.otus.spring.integration.domain;
+
+public class OrderItem {
+
+    private final String itemName;
+
+    public OrderItem(String itemName) {
+        this.itemName = itemName;
+    }
+
+    public String getItemName() {
+        return itemName;
+    }
+}
@@ -0,0 +1,16 @@
+package ru.otus.spring.integration.kitchen;
+
+import org.springframework.stereotype.Service;
+import ru.otus.spring.integration.domain.Food;
+import ru.otus.spring.integration.domain.OrderItem;
+
+@Service
+public class KitchenService {
+
+    public Food cook(OrderItem orderItem) throws Exception {
+        System.out.println("Cooking " + orderItem.getItemName());
+        Thread.sleep(3000);
+        System.out.println("Cooking " + orderItem.getItemName() + " done");
+        return new Food(orderItem.getItemName());
+    }
+}