2025-09 spring-37-rabbit

2026-05-30 10:50:42 +00:00 · 2026-02-19 19:07:41 +03:00
parent 8ff44e4c86
commit cebc83bf18
35 changed files with 1067 additions and 0 deletions
@@ -0,0 +1,41 @@
+## Пример взаимодействия приложений через RabbitMQ
+
+В примере демонстрируется:
+
+* *использование `@Scheduled` таймера для имитации пользовательской активности*
+* *оправка и прием сообщений между двумя приложениями через RabbitMQ*
+* *создание и отправка email сообщений средствами SpringMail*
+* *аггрегация данных с помощью SpringData/JPQL*
+* *создание кастомного endpoint-а actuator-а для вывода статистики*
+
+Описание примера:
+
+user-activity-emitter-microservice:
+
+* *по таймеру `UserActivityEmitterService` достает из БД случайный тип активности и пользователя*
+* *после чего формирует из них объект активности (`UserActivity`) и отправляет в очередь сообщений RabbitMQ с
+  помощью `RabbitTemplate`
+  настроенный на работу с "main-exchange"*
+* *большее число активностей имеют `routingKey` = "user.activity.message.simple" *
+* *активности, у которых в названии типа есть вхождение "Вредн" имееют свой `routingKey` ("
+  user.activity.message.important") *
+* *так же приложение по таймеру, с помощью `ActivityStatCalculationEmitterSerivce` инициирует подсчет статистики с
+  помощью отправки
+  сообщения в очередь RabbitMQ c `routingKey` = "user.activity.stat"*
+
+user-activity-processor-microservice:
+
+* *в приложении для обработки сообщений есть несколько очередей, куда попадают сообщения в зависимости от `routingKey`*
+* *их прослушивает компонент `RabbitMqListener`, который содержит по методу на каждую очередь"*
+* *в "all-activity-queue" попадают все активности. На выходе из данной очереди активности сохраняются в БД*
+* *в "important-activity-queue" попадают важные активности. На выходе из данной очереди активности преобразуются в
+  письма и отправляются на
+  почту администратору*
+* *в "stat-calc-commands-queue" попадают команды, которые инициируют расчет статистики. *
+* *в методе-обработчике сообщений данной очереди происходит удаление старых статистических данных, а так же подсчет и
+  сохранение в БД новых*
+* *за вывод статистических данных отвечает кастомный endpoint actuator-а `ActivityStatEndpoint`*
+
+Для работы приложений требуется работающий RabbitMQ. За его запуск отвечает docker-compose.yml
+Адрес консоли RabbitMQ: http://localhost:15672/
+Логин и пароль: guest
@@ -0,0 +1,7 @@
+version: '3'
+services:
+  rabbitmq:
+    image: rabbitmq:management
+    ports:
+      - "5672:5672"
+      - "15672:15672"
@@ -0,0 +1,38 @@
+<?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>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.5.2</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <groupId>ru.otus.example</groupId>
+    <artifactId>spring-mail-rabbitmq-demo</artifactId>
+    <version>1.0</version>
+
+    <packaging>pom</packaging>
+
+    <modules>
+        <module>user-activity-models</module>
+        <module>user-activity-emitter-microservice</module>
+        <module>user-activity-processor-microservice</module>
+    </modules>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+</project>
@@ -0,0 +1,31 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**
+!**/src/test/**
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+
+### VS Code ###
+.vscode/
@@ -0,0 +1,55 @@
+<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>ru.otus.example</groupId>
+        <artifactId>spring-mail-rabbitmq-demo</artifactId>
+        <version>1.0</version>
+    </parent>
+
+    <artifactId>user-activity-emitter-microservice</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>user-activity-emitter-microservice</name>
+    <description>User activity emitter microservice</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-amqp</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>ru.otus.example</groupId>
+            <artifactId>user-activity-models</artifactId>
+            <version>0.0.1-SNAPSHOT</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
@@ -0,0 +1,17 @@
+package ru.otus.example.rabbitmq;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.domain.EntityScan;
+import org.springframework.scheduling.annotation.EnableScheduling;
+
+@EnableScheduling
+@EntityScan("ru.otus.example.useractivitymodels")
+@SpringBootApplication
+public class EmitterMicroServiceApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(EmitterMicroServiceApplication.class, args);
+    }
+
+}
@@ -0,0 +1,34 @@
+package ru.otus.example.rabbitmq.rabbitmq;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.amqp.core.TopicExchange;
+import org.springframework.amqp.rabbit.connection.ConnectionFactory;
+import org.springframework.amqp.rabbit.core.RabbitTemplate;
+import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class RabbitMqConfig {
+
+    private static final String MAIN_EXCHANGE_NAME = "main-exchange";
+
+    @Bean
+    public Jackson2JsonMessageConverter jsonConverter(ObjectMapper objectMapper) {
+        return new Jackson2JsonMessageConverter(objectMapper);
+    }
+
+    @Bean
+    public RabbitTemplate rabbitTemplate(ConnectionFactory connectionFactory,
+                                         Jackson2JsonMessageConverter jsonConverter) {
+        RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
+        rabbitTemplate.setExchange(MAIN_EXCHANGE_NAME);
+        rabbitTemplate.setMessageConverter(jsonConverter);
+        return rabbitTemplate;
+    }
+
+    @Bean
+    public TopicExchange topicExchange() {
+        return new TopicExchange(MAIN_EXCHANGE_NAME);
+    }
+}
@@ -0,0 +1,9 @@
+package ru.otus.example.rabbitmq.repositories;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.transaction.annotation.Transactional;
+import ru.otus.example.useractivitymodels.UserActivity;
+
+@Transactional
+public interface ActivityRepository extends JpaRepository<UserActivity, Long> {
+}
@@ -0,0 +1,7 @@
+package ru.otus.example.rabbitmq.repositories;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import ru.otus.example.useractivitymodels.ActivityType;
+
+public interface ActivityTypeRepository extends JpaRepository<ActivityType, Long> {
+}
@@ -0,0 +1,9 @@
+package ru.otus.example.rabbitmq.repositories;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.transaction.annotation.Transactional;
+import ru.otus.example.useractivitymodels.AppUser;
+
+@Transactional
+public interface AppUserRepository extends JpaRepository<AppUser, Long> {
+}
@@ -0,0 +1,24 @@
+package ru.otus.example.rabbitmq.services;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.amqp.rabbit.core.RabbitTemplate;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Service;
+
+@RequiredArgsConstructor
+@Service
+@Slf4j
+public class ActivityStatCalculationEmitterSerivce {
+    private static final String USER_ACTIVITY_STAT_ROUTING_KEY = "user.activity.stat";
+    private static final String CALC_STAT_COMMAND = "{\"command\": \"calc stat now\"}";
+
+    private final RabbitTemplate rabbitTemplate;
+
+    @Scheduled(initialDelay = 3000, fixedRate = 10000)
+    public void emitAppUserActivityStatCalculation() {
+//        log.warn("Stat send!!!");
+        rabbitTemplate.convertAndSend(USER_ACTIVITY_STAT_ROUTING_KEY, CALC_STAT_COMMAND);
+        log.warn("Stat calculated!!!");
+    }
+}
@@ -0,0 +1,40 @@
+package ru.otus.example.rabbitmq.services;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import lombok.val;
+import org.springframework.amqp.rabbit.core.RabbitTemplate;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Service;
+import ru.otus.example.rabbitmq.repositories.ActivityTypeRepository;
+import ru.otus.example.rabbitmq.repositories.AppUserRepository;
+import ru.otus.example.useractivitymodels.UserActivity;
+
+import java.util.Random;
+
+@RequiredArgsConstructor
+@Service
+@Slf4j
+public class UserActivityEmitterService {
+    private final ActivityTypeRepository activityTypeRepository;
+    private final AppUserRepository appUserRepository;
+    private final RabbitTemplate rabbitTemplate;
+
+    @SuppressWarnings("unused")
+    @Scheduled(initialDelay = 2000, fixedRate = 3000)
+    public void emitAppUserActivity() {
+        val random = new Random();
+        val activityTypes = activityTypeRepository.findAll();
+        val appUsers = appUserRepository.findAll();
+
+        val activityType = activityTypes.get(random.nextInt(activityTypes.size()));
+        val appUser = appUsers.get(random.nextInt(appUsers.size()));
+        val appUserActivity = new UserActivity(activityType, appUser);
+        val isImportant = activityType.getName().contains("Вредн");
+
+        val routingKey = String.format("user.activity.message.%s", isImportant ? "important" : "simple");
+        rabbitTemplate.convertAndSend(routingKey, appUserActivity);
+        log.info("Send activity: {}", appUserActivity);
+
+    }
+}
@@ -0,0 +1,14 @@
+server:
+  port: 9090
+spring:
+  jpa:
+    generate-ddl: false
+    hibernate:
+      ddl-auto: none
+    show-sql: false
+
+  rabbitmq:
+    addresses: "localhost"
+  sql:
+    init:
+      mode: always
@@ -0,0 +1,44 @@
+insert into app_users(name, email)
+values ('Рафаель Губерманович Тыгыдым', 'test@mail.ru');
+
+insert into app_users(name, email)
+values ('Артем Демосфенович Шмяк', 'test@mail.ru');
+
+insert into app_users(name, email)
+values ('Ифигения Бореславовна Фуфелшмерц', 'test@mail.ru');
+
+
+insert into activity_types(name)
+values ('Очень полезное дело №4');
+
+insert into activity_types(name)
+values ('Очень полезное дело №13');
+
+insert into activity_types(name)
+values ('Очень полезное дело №34');
+
+insert into activity_types(name)
+values ('Очень полезное дело №48');
+
+insert into activity_types(name)
+values ('Очень полезное дело №53');
+
+insert into activity_types(name)
+values ('Вредное дело №11');
+
+insert into activity_types(name)
+values ('Вредное дело №12');
+
+insert into activity_types(name)
+values ('Вредное дело №13');
+
+insert into activity_types(name)
+values ('Вредное дело №14');
+
+insert into activity_types(name)
+values ('Вредное дело №15');
+
+insert into activity_types(name)
+values ('Вредное дело №16');
+
+
@@ -0,0 +1,31 @@
+create table activity_types
+(
+    id   bigint auto_increment,
+    name varchar(255),
+    primary key (id)
+);
+
+create table app_users
+(
+    id    bigint auto_increment,
+    email varchar(255),
+    name  varchar(255),
+    primary key (id)
+);
+
+
+create table app_users_activity
+(
+    id               bigint auto_increment,
+    activity_time    timestamp,
+    app_user_id      bigint,
+    activity_type_id bigint,
+    primary key (id)
+);
+
+alter table app_users_activity
+    add constraint app_users_activity_user_id_fk foreign key (app_user_id) references app_users;
+
+alter table app_users_activity
+    add constraint app_users_activity_activity_type_id_fk foreign key (activity_type_id) references activity_types;
+
@@ -0,0 +1,31 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**
+!**/src/test/**
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+
+### VS Code ###
+.vscode/
@@ -0,0 +1,32 @@
+<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>ru.otus.example</groupId>
+        <artifactId>spring-mail-rabbitmq-demo</artifactId>
+        <version>1.0</version>
+    </parent>
+
+    <artifactId>user-activity-models</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>user-activity-models</name>
+    <description>Models for spring mail rabbitmq demo project</description>
+
+
+    <dependencies>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-annotations</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>jakarta.persistence</groupId>
+            <artifactId>jakarta.persistence-api</artifactId>
+        </dependency>
+
+
+    </dependencies>
+
+</project>
@@ -0,0 +1,37 @@
+package ru.otus.example.useractivitymodels;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import jakarta.persistence.*;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@Entity
+@Table(name = "activity_stat")
+public class ActivityStatElem {
+
+    @JsonIgnore
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private long id;
+
+    @JsonProperty("Имя пользователя")
+    @Column(name = "app_user_name")
+    private String appUserName;
+
+    @JsonProperty("Тип активности")
+    @Column(name = "activity_type")
+    private String activityType;
+
+    @JsonProperty("Количество")
+    @Column(name = "activities_count")
+    private long activitiesCount;
+
+    public ActivityStatElem(String appUserName, String activityType, long activitiesCount) {
+        this.appUserName = appUserName;
+        this.activityType = activityType;
+        this.activitiesCount = activitiesCount;
+    }
+}
@@ -0,0 +1,21 @@
+package ru.otus.example.useractivitymodels;
+
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@Entity
+@Table(name = "activity_types")
+public class ActivityType {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id")
+    private long id;
+
+    @Column(name = "name")
+    private String name;
+}
@@ -0,0 +1,24 @@
+package ru.otus.example.useractivitymodels;
+
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Entity
+@Table(name = "app_users")
+public class AppUser {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id")
+    private long id;
+
+    @Column(name = "email")
+    private String email;
+
+    @Column(name = "name")
+    private String name;
+}
@@ -0,0 +1,38 @@
+package ru.otus.example.useractivitymodels;
+
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDateTime;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Entity
+@Table(name = "app_users_activity")
+public class UserActivity {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id")
+    private long id;
+
+    @Column(name = "activity_time")
+    private LocalDateTime activityTime;
+
+    @ManyToOne(fetch = FetchType.EAGER)
+    @JoinColumn(name = "activity_type_id")
+    private ActivityType type;
+
+    @ManyToOne(fetch = FetchType.EAGER)
+    @JoinColumn(name = "app_user_id")
+    private AppUser appUser;
+
+    public UserActivity(ActivityType type, AppUser appUser) {
+        this.id = id;
+        this.type = type;
+        this.appUser = appUser;
+        this.activityTime = LocalDateTime.now();
+    }
+}
@@ -0,0 +1,31 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**
+!**/src/test/**
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+
+### VS Code ###
+.vscode/
@@ -0,0 +1,66 @@
+<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>ru.otus.example</groupId>
+        <artifactId>spring-mail-rabbitmq-demo</artifactId>
+        <version>1.0</version>
+    </parent>
+
+    <artifactId>user-activity-processor-microservice</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>user-activity-processor-microservice</name>
+    <description>User activity processor microservice</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-amqp</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-mail</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>ru.otus.example</groupId>
+            <artifactId>user-activity-models</artifactId>
+            <version>0.0.1-SNAPSHOT</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
@@ -0,0 +1,17 @@
+package ru.otus.example.rabbitmq;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.domain.EntityScan;
+import org.springframework.scheduling.annotation.EnableScheduling;
+
+@EnableScheduling
+@EntityScan("ru.otus.example.useractivitymodels")
+@SpringBootApplication
+public class ProcessorMicroServiceApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(ProcessorMicroServiceApplication.class, args);
+    }
+
+}
@@ -0,0 +1,23 @@
+package ru.otus.example.rabbitmq.actuator;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
+import org.springframework.boot.actuate.endpoint.annotation.ReadOperation;
+import org.springframework.stereotype.Component;
+import ru.otus.example.rabbitmq.repositories.ActivityStatRepository;
+import ru.otus.example.useractivitymodels.ActivityStatElem;
+
+import java.util.List;
+
+@RequiredArgsConstructor
+@Component
+@Endpoint(id = "activity-stat")
+public class ActivityStatEndpoint {
+
+    private final ActivityStatRepository activityStatRepository;
+
+    @ReadOperation
+    public List<ActivityStatElem> getAppUsersActivityStat() {
+        return activityStatRepository.findAll();
+    }
+}
@@ -0,0 +1,13 @@
+package ru.otus.example.rabbitmq.config;
+
+import lombok.Data;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+@Data
+@Component
+@ConfigurationProperties("app")
+public class AppProps {
+    private String serverEmail;
+    private String adminEmail;
+}
@@ -0,0 +1,75 @@
+package ru.otus.example.rabbitmq.rabbitmq;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.amqp.core.*;
+import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class RabbitMqConfig {
+    @Bean
+    public Jackson2JsonMessageConverter jsonConverter(ObjectMapper objectMapper) {
+        return new Jackson2JsonMessageConverter(objectMapper);
+    }
+
+    @Bean
+    public Queue allActivityQueue() {
+        return new Queue("all-activity-queue");
+    }
+
+    @Bean
+    public Queue importantActivityQueue() {
+        return new Queue("important-activity-queue");
+    }
+
+    @Bean
+    public Queue statCalcCommandsQueue() {
+        return QueueBuilder.durable("stat-calc-commands-queue")
+                .maxLength(5)
+                .deadLetterExchange("dead-letter-exchange")
+                .build();
+    }
+
+    @Bean
+    public Queue deadLetterQueue() {
+        return new Queue("dead-letter-queue");
+    }
+
+    @Bean
+    public TopicExchange topicExchange() {
+        return new TopicExchange("main-exchange");
+    }
+
+    @Bean
+    public FanoutExchange deadLetterExchange() {
+        return new FanoutExchange("dead-letter-exchange");
+    }
+
+    @Bean
+    public Binding allActivityBinding() {
+        return BindingBuilder.bind(allActivityQueue())
+                .to(topicExchange())
+                .with("user.activity.message.*");
+    }
+
+    @Bean
+    public Binding importantActivityBinding() {
+        return BindingBuilder.bind(importantActivityQueue())
+                .to(topicExchange())
+                .with("user.activity.message.important");
+    }
+
+    @Bean
+    public Binding statCalcCommandsBinding() {
+        return BindingBuilder.bind(statCalcCommandsQueue())
+                .to(topicExchange())
+                .with("user.activity.stat");
+    }
+
+    @Bean
+    public Binding deadLetterBinding() {
+        return BindingBuilder.bind(deadLetterQueue())
+                .to(deadLetterExchange());
+    }
+}
@@ -0,0 +1,70 @@
+package ru.otus.example.rabbitmq.rabbitmq;
+
+import com.rabbitmq.client.Channel;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import lombok.val;
+import org.springframework.amqp.AmqpRejectAndDontRequeueException;
+import org.springframework.amqp.rabbit.annotation.RabbitListener;
+import org.springframework.amqp.support.AmqpHeaders;
+import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.messaging.handler.annotation.Header;
+import org.springframework.stereotype.Service;
+import ru.otus.example.rabbitmq.repositories.ActivityRepository;
+import ru.otus.example.rabbitmq.repositories.ActivityStatRepository;
+import ru.otus.example.rabbitmq.services.UserActivityToEmailTransformer;
+import ru.otus.example.useractivitymodels.UserActivity;
+
+@RequiredArgsConstructor
+@Service
+@Slf4j
+public class RabbitMqListener {
+
+    private final ActivityRepository activityRepository;
+    private final ActivityStatRepository activityStatRepository;
+    private final UserActivityToEmailTransformer messageTransformer;
+    private final JavaMailSender mailSender;
+
+    @RabbitListener(queues = "important-activity-queue")
+    public void processImportantMessages(UserActivity message) {
+        log.info("RECEIVED FROM important-activity-queue: " + message);
+
+        try {
+            val mailMessage = messageTransformer.transform(message);
+            log.info("Как будто посылаем письмо: " + mailMessage);
+            //mailSender.send(mailMessage);
+        } catch (Exception e) {
+            throw new AmqpRejectAndDontRequeueException("Ooops");
+        }
+    }
+
+    @RabbitListener(queues = "all-activity-queue")
+    public void processAllMessages(UserActivity message) {
+        log.info("RECEIVED FROM all-activity-queue: " + message);
+        try {
+            activityRepository.save(message);
+        } catch (Exception e) {
+            throw new AmqpRejectAndDontRequeueException("Ooops");
+        }
+    }
+
+    @RabbitListener(queues = "stat-calc-commands-queue", ackMode = "MANUAL")
+    public void processStatCalcCommandsMessages(String message,
+                                                Channel channel,
+                                                @Header(AmqpHeaders.DELIVERY_TAG) long tag) throws Exception {
+        log.warn("RECEIVED FROM stat-calc-commands-queue: " + message);
+
+        activityStatRepository.deleteAll();
+        val activityStat = activityStatRepository.calcActivityStat();
+        activityStatRepository.saveAll(activityStat);
+//        sleep(5000);
+        channel.basicAck(tag, false);
+
+        // Для ackMode = "MANUAL" и перехода в dead letter exchange
+        //channel.basicNack(tag, false, false);
+
+        // Для ackMode = "AUTO" и перехода в dead letter exchange
+        //throw new AmqpRejectAndDontRequeueException("Ooops");
+
+    }
+}
@@ -0,0 +1,9 @@
+package ru.otus.example.rabbitmq.repositories;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.transaction.annotation.Transactional;
+import ru.otus.example.useractivitymodels.UserActivity;
+
+@Transactional
+public interface ActivityRepository extends JpaRepository<UserActivity, Long> {
+}
@@ -0,0 +1,21 @@
+package ru.otus.example.rabbitmq.repositories;
+
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.transaction.annotation.Transactional;
+import ru.otus.example.useractivitymodels.ActivityStatElem;
+
+import java.util.List;
+
+@Transactional
+public interface ActivityStatRepository extends JpaRepository<ActivityStatElem, Long> {
+
+    @Transactional(readOnly = true)
+    @Query("select new ru.otus.example.useractivitymodels.ActivityStatElem(u.name, t.name, count(a)) " +
+            "from UserActivity a left join a.appUser u left join a.type t " +
+            "group by u.name, t.name " +
+            "order by count(a) desc, u.name, t.name")
+    List<ActivityStatElem> calcActivityStat();
+
+}
@@ -0,0 +1,8 @@
+package ru.otus.example.rabbitmq.services;
+
+import org.springframework.mail.SimpleMailMessage;
+import ru.otus.example.useractivitymodels.UserActivity;
+
+public interface UserActivityToEmailTransformer {
+    SimpleMailMessage transform(UserActivity activity);
+}
@@ -0,0 +1,25 @@
+package ru.otus.example.rabbitmq.services;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.mail.SimpleMailMessage;
+import org.springframework.stereotype.Service;
+import ru.otus.example.rabbitmq.config.AppProps;
+import ru.otus.example.useractivitymodels.UserActivity;
+
+@RequiredArgsConstructor
+@Service
+public class UserActivityToEmailTransformerImpl implements UserActivityToEmailTransformer {
+
+    private final AppProps appProps;
+
+    @Override
+    public SimpleMailMessage transform(UserActivity activity) {
+        SimpleMailMessage mailMessage = new SimpleMailMessage();
+        mailMessage.setTo(appProps.getAdminEmail());
+        mailMessage.setFrom(appProps.getServerEmail());
+        mailMessage.setSubject("Обнаружена вредная активность");
+        mailMessage.setText(String.format("Внимание!!! Обнаружена вредная активность! Время: %s, пользователь: %s, тип активности: %s",
+                activity.getActivityTime(), activity.getAppUser().getName(), activity.getType().getName()));
+        return mailMessage;
+    }
+}
@@ -0,0 +1,40 @@
+app:
+  # адрес почты, через которую сервер отправляет письма
+  server-email: ${server.email}
+  # адрес почты администратора, на которую сервер отправляет письма
+  admin-email: ${admin.email}
+
+spring:
+  jpa:
+    generate-ddl: false
+    hibernate:
+      ddl-auto: none
+    show-sql: true
+
+  rabbitmq:
+    addresses: "localhost"
+
+  mail:
+    host: smtp.mail.ru
+    port: 465
+    # логин и пароль для почты, через которую сервер отправляет письма
+    username: ${email.server.user}
+    password: ${email.server.password}
+    protocol: smtps
+    properties:
+      mail:
+        smtp:
+          auth: true
+          starttls.enable: true
+  sql:
+    init:
+      mode:
+
+management:
+  endpoints:
+    web:
+      exposure:
+        include: health, info, activity-stat
+  endpoint:
+    health:
+      show-details: always
@@ -0,0 +1,44 @@
+insert into app_users(name, email)
+values ('Рафаель Губерманович Тыгыдым', 'test@mail.ru');
+
+insert into app_users(name, email)
+values ('Артем Демосфенович Шмяк', 'test@mail.ru');
+
+insert into app_users(name, email)
+values ('Ифигения Бореславовна Фуфелшмерц', 'test@mail.ru');
+
+
+insert into activity_types(name)
+values ('Очень полезное дело №4');
+
+insert into activity_types(name)
+values ('Очень полезное дело №13');
+
+insert into activity_types(name)
+values ('Очень полезное дело №34');
+
+insert into activity_types(name)
+values ('Очень полезное дело №48');
+
+insert into activity_types(name)
+values ('Очень полезное дело №53');
+
+insert into activity_types(name)
+values ('Вредное дело №11');
+
+insert into activity_types(name)
+values ('Вредное дело №12');
+
+insert into activity_types(name)
+values ('Вредное дело №13');
+
+insert into activity_types(name)
+values ('Вредное дело №14');
+
+insert into activity_types(name)
+values ('Вредное дело №15');
+
+insert into activity_types(name)
+values ('Вредное дело №16');
+
+
@@ -0,0 +1,41 @@
+create table activity_types
+(
+    id   bigint auto_increment,
+    name varchar(255),
+    primary key (id)
+);
+
+create table app_users
+(
+    id    bigint auto_increment,
+    email varchar(255),
+    name  varchar(255),
+    primary key (id)
+);
+
+
+create table app_users_activity
+(
+    id               bigint auto_increment,
+    activity_time    timestamp,
+    app_user_id      bigint,
+    activity_type_id bigint,
+    primary key (id)
+);
+
+alter table app_users_activity
+    add constraint app_users_activity_user_id_fk foreign key (app_user_id) references app_users;
+
+alter table app_users_activity
+    add constraint app_users_activity_activity_type_id_fk foreign key (activity_type_id) references activity_types;
+
+
+create table activity_stat
+(
+    id               bigint auto_increment,
+    app_user_name    varchar(255),
+    activity_type    varchar(255),
+    activities_count bigint,
+    primary key (id)
+);
+