примеры к занятию

2022-02/spring-27/oauth/src/main/java/ru/otus/spring/sso/controller/UserController.java

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+package ru.otus.spring.sso.controller;
+
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.security.oauth2.core.user.OAuth2User;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Collections;
+import java.util.Map;
+
+@RestController
+public class UserController {
+    @GetMapping("/user")
+    public Map<String, Object> user( @AuthenticationPrincipal OAuth2User principal) {
+        return Collections.singletonMap("name", principal.getAttribute("name"));
+    }
+}

2022-02/spring-27/oauth/src/main/java/ru/otus/spring/sso/security/SecurityConfig.java

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+package ru.otus.spring.sso.security;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+import org.springframework.security.web.authentication.HttpStatusEntryPoint;
+
+public class SecurityConfig extends WebSecurityConfigurerAdapter {
+    @Override
+    protected void configure( HttpSecurity http ) throws Exception {
+        // @formatter:off
+        http
+                .authorizeRequests( a -> a
+                        .antMatchers( "/", "/error", "/webjars/**" ).permitAll()
+                        .anyRequest().authenticated()
+                )
+                .exceptionHandling( e -> e
+                        .authenticationEntryPoint( new HttpStatusEntryPoint( HttpStatus.UNAUTHORIZED ) )
+                )
+                .csrf().disable()
+                .logout( l -> l
+                        .logoutSuccessUrl( "/" ).permitAll()
+                )
+
+                .oauth2Login();
+        // @formatter:on
+    }
+}

2022-05/spring-31/.gitignore

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+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/

2022-05/spring-31/pom.xml

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+<?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-31</artifactId>
+    <version>1.0</version>
+
+    <packaging>pom</packaging>
+
+    <modules>
+        <module>spring-31-exercise</module>
+        <module>spring-31-solution</module>
+
+    </modules>
+</project>

2022-05/spring-31/spring-31-exercise/pom.xml

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+<?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-31-exercise</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>

2022-05/spring-31/spring-31-exercise/src/main/java/ru/otus/spring/integration/App.java

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+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)]);
+    }
+}

2022-05/spring-31/spring-31-exercise/src/main/java/ru/otus/spring/integration/Cafe.java

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+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);
+}

2022-05/spring-31/spring-31-exercise/src/main/java/ru/otus/spring/integration/domain/Food.java

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+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;
+    }
+}

2022-05/spring-31/spring-31-exercise/src/main/java/ru/otus/spring/integration/domain/OrderItem.java

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+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;
+    }
+}

2022-05/spring-31/spring-31-exercise/src/main/java/ru/otus/spring/integration/kitchen/KitchenService.java

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+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());
+    }
+}

2022-05/spring-31/spring-31-solution/pom.xml

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+<?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-31-solution</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>

2022-05/spring-31/spring-31-solution/src/main/java/ru/otus/spring/integration/App.java

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+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 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.concurrent.ForkJoinPool;
+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 );
+
+        ForkJoinPool pool = ForkJoinPool.commonPool();
+
+        while ( true ) {
+            Thread.sleep( 7000 );
+
+            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 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;
+    }
+}

2022-05/spring-31/spring-31-solution/src/main/java/ru/otus/spring/integration/Cafe.java

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+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);
+}

2022-05/spring-31/spring-31-solution/src/main/java/ru/otus/spring/integration/domain/Food.java

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+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;
+    }
+}

2022-05/spring-31/spring-31-solution/src/main/java/ru/otus/spring/integration/domain/OrderItem.java

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+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;
+    }
+}

2022-05/spring-31/spring-31-solution/src/main/java/ru/otus/spring/integration/kitchen/KitchenService.java

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+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());
+    }
+}