2022-02 - 29

2026-06-20 11:14:34 +00:00 · 2022-06-11 13:54:20 +06:00
parent c7d30c48ab
commit abad2f4bbe
10 changed files with 242 additions and 0 deletions
@@ -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-29-integration-example</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.3.3.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 +1,21 @@
+package ru.otus.spring.integration;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.support.AbstractApplicationContext;
+import ru.otus.spring.integration.service.OrderService;
+
+@SpringBootApplication
+public class App {
+
+    public static void main( String[] args ) throws Exception {
+        ConfigurableApplicationContext ctx = SpringApplication.run(App.class, args);
+
+        OrderService orderService = ctx.getBean(OrderService.class);
+        orderService.startOrdersLoop();
+
+    }
+
+}
@@ -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.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 +1,45 @@
+package ru.otus.spring.integration.integration;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.integration.channel.PublishSubscribeChannel;
+import org.springframework.integration.channel.QueueChannel;
+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.service.KitchenService;
+
+@Configuration
+public class IntegrationConfig {
+
+    private static final int QUEUE_CAPACITY = 10;
+    private static final String COOK_METHOD_NAME = "cook";
+
+    @Bean
+    public QueueChannel itemsChannel() {
+        return MessageChannels.queue(QUEUE_CAPACITY).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(KitchenService kitchenService) {
+        return IntegrationFlows.from(itemsChannel())
+                .split()
+                .handle(kitchenService, COOK_METHOD_NAME)
+                .aggregate()
+                .channel(foodChannel())
+                .get();
+    }
+
+}
@@ -0,0 +1,8 @@
+package ru.otus.spring.integration.service;
+
+import ru.otus.spring.integration.domain.Food;
+import ru.otus.spring.integration.domain.OrderItem;
+
+public interface KitchenService {
+    Food cook(OrderItem orderItem) throws Exception;
+}
@@ -0,0 +1,17 @@
+package ru.otus.spring.integration.service;
+
+import org.springframework.stereotype.Service;
+import ru.otus.spring.integration.domain.Food;
+import ru.otus.spring.integration.domain.OrderItem;
+
+@Service
+public class KitchenServiceImpl implements KitchenService {
+
+    @Override
+    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 +1,5 @@
+package ru.otus.spring.integration.service;
+
+public interface OrderService {
+    void startOrdersLoop() throws Exception;
+}
@@ -0,0 +1,60 @@
+package ru.otus.spring.integration.service;
+
+import org.apache.commons.lang3.RandomUtils;
+import org.springframework.stereotype.Service;
+import ru.otus.spring.integration.domain.Food;
+import ru.otus.spring.integration.domain.OrderItem;
+import ru.otus.spring.integration.integration.Cafe;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.ForkJoinPool;
+import java.util.stream.Collectors;
+
+@Service
+public class OrderServiceImpl implements OrderService {
+
+    private static final int ORDERS_DELAY_MILLS = 7000;
+    private static final String[] MENU = {"coffee", "tea", "smoothie", "whiskey", "beer", "cola", "water"};
+
+    private final Cafe cafe;
+
+    public OrderServiceImpl(Cafe cafe) {
+        this.cafe = cafe;
+    }
+
+    @SuppressWarnings({"resource", "Duplicates", "InfiniteLoopStatement", "BusyWait"})
+    @Override
+    public void startOrdersLoop() throws Exception {
+        ForkJoinPool pool = ForkJoinPool.commonPool();
+
+        while (true) {
+            Thread.sleep(ORDERS_DELAY_MILLS);
+
+            pool.execute(() -> {
+                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 OrderItem generateOrderItem() {
+        return new OrderItem(MENU[RandomUtils.nextInt(0, MENU.length)]);
+    }
+
+    private Collection<OrderItem> generateOrderItems() {
+        List<OrderItem> items = new ArrayList<>();
+        for (int i = 0; i < RandomUtils.nextInt(1, 5); ++i) {
+            items.add(generateOrderItem());
+        }
+        return items;
+    }
+}