реализовать микросервисную архитектуру

.run/ShareItGateway.run.xml

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+<component name="ProjectRunConfigurationManager">
+    <configuration default="false" name="ShareItGateway" type="Application" factoryName="Application" nameIsGenerated="true">
+        <option name="MAIN_CLASS_NAME" value="ru.practicum.shareit.ShareItGateway" />
+        <module name="shareit-gateway" />
+        <extension name="coverage">
+            <pattern>
+                <option name="PATTERN" value="ru.practicum.shareit.*" />
+                <option name="ENABLED" value="true" />
+            </pattern>
+        </extension>
+        <method v="2">
+            <option name="Make" enabled="true" />
+        </method>
+    </configuration>
+</component>

.run/ShareItServer.run.xml

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+<component name="ProjectRunConfigurationManager">
+    <configuration default="false" name="ShareItServer" type="Application" factoryName="Application" nameIsGenerated="true">
+        <option name="MAIN_CLASS_NAME" value="ru.practicum.shareit.ShareItServer" />
+        <module name="shareit-server" />
+        <extension name="coverage">
+            <pattern>
+                <option name="PATTERN" value="ru.practicum.shareit.*" />
+                <option name="ENABLED" value="true" />
+            </pattern>
+        </extension>
+        <method v="2">
+            <option name="Make" enabled="true" />
+        </method>
+    </configuration>
+</component>

docker-compose.yml

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+version: '3.8'
+
+services:
+  db:
+    image: postgres:16.1
+    container_name: postgres
+    ports:
+      - "6541:5432"
+    environment:
+      - POSTGRES_PASSWORD=shareit
+      - POSTGRES_USER=shareit
+      - POSTGRES_DB=shareit
+    volumes:
+      - ./server/src/main/resources/schema.sql:/docker-entrypoint-initdb.d/initDB.sql
+    healthcheck:
+      test: pg_isready -q -d $$POSTGRES_DB -U $$POSTGRES_USER
+      timeout: 5s
+      interval: 5s
+      retries: 10
+
+  gateway:
+    build: gateway
+    image: shareit-gateway
+    container_name: shareit-gateway
+    ports:
+      - "8080:8080"
+    depends_on:
+      - server
+    environment:
+      - SHAREIT_SERVER_URL=http://server:9090
+
+  server:
+    build: server
+    image: shareit-server
+    container_name: shareit-server
+    ports:
+      - "9090:9090"
+    depends_on:
+      db:
+        condition: service_healthy
+    environment:
+      - SPRING_DATASOURCE_URL=jdbc:postgresql://db:5432/shareit
+      - SPRING_DATASOURCE_USERNAME=shareit
+      - SPRING_DATASOURCE_PASSWORD=shareit
+    volumes:
+      - ./server/src/main/resources/application.properties:/app/application.properties

gateway/Dockerfile

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+FROM eclipse-temurin:21-jre-jammy
+VOLUME /tmp
+ARG JAR_FILE=target/*.jar
+COPY ${JAR_FILE} app.jar
+ENTRYPOINT ["sh", "-c", "java ${JAVA_OPTS} -jar /app.jar"]

gateway/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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>ru.practicum</groupId>
+        <artifactId>shareit</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>shareit-gateway</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+
+    <name>ShareIt Gateway</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.hibernate.validator</groupId>
+            <artifactId>hibernate-validator</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.httpcomponents.client5</groupId>
+            <artifactId>httpclient5</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-configuration-processor</artifactId>
+            <optional>true</optional>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

gateway/src/main/java/ru/practicum/shareit/ShareItGateway.java

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+package ru.practicum.shareit;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ShareItGateway {
+    public static void main(String[] args) {
+        SpringApplication.run(ShareItGateway.class, args);
+    }
+
+}

gateway/src/main/java/ru/practicum/shareit/booking/BookingClient.java

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+package ru.practicum.shareit.booking;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.http.ResponseEntity;
+import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
+import org.springframework.stereotype.Service;
+import org.springframework.web.util.DefaultUriBuilderFactory;
+
+import ru.practicum.shareit.booking.dto.BookItemRequestDto;
+import ru.practicum.shareit.booking.dto.BookingState;
+import ru.practicum.shareit.client.BaseClient;
+
+@Service
+public class BookingClient extends BaseClient {
+    private static final String API_PREFIX = "/bookings";
+
+    @Autowired
+    public BookingClient(@Value("${shareit-server.url}") String serverUrl, RestTemplateBuilder builder) {
+        super(
+                builder
+                        .uriTemplateHandler(new DefaultUriBuilderFactory(serverUrl + API_PREFIX))
+                        .requestFactory(() -> new HttpComponentsClientHttpRequestFactory())
+                        .build()
+        );
+    }
+
+    public ResponseEntity<Object> getBookings(Long userId, BookingState state, Integer from, Integer size) {
+        String path = "?state=" + state.name() + "&from=" + from;
+        if (size != null) {
+            path += "&size=" + size;
+        }
+        return get(path, userId, null);
+    }
+
+    public ResponseEntity<Object> getBookingsOwner(Long userId, BookingState state, Integer from, Integer size) {
+        String path = "/owner?state=" + state.name() + "&from=" + from;
+        if (size != null) {
+            path += "&size=" + size;
+        }
+        return get(path, userId, null);
+    }
+
+
+    public ResponseEntity<Object> create(Long userId, BookItemRequestDto requestDto) {
+        return post("", userId, requestDto);
+    }
+
+    public ResponseEntity<Object> getBooking(Long userId, Long bookingId) {
+        return get("/" + bookingId, userId);
+    }
+
+    public ResponseEntity<Object> update(Long bookingId, Long userId, Boolean approved) {
+        String path = "/" + bookingId + "?approved=" + approved;
+        return patch(path, userId, null, null);
+    }
+}

gateway/src/main/java/ru/practicum/shareit/booking/BookingController.java

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+package ru.practicum.shareit.booking;
+
+import jakarta.validation.Valid;
+import jakarta.validation.constraints.PositiveOrZero;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
+import ru.practicum.shareit.booking.dto.BookItemRequestDto;
+import ru.practicum.shareit.booking.dto.BookingState;
+
+@Controller
+@RequestMapping(path = "/bookings")
+@RequiredArgsConstructor
+@Slf4j
+@Validated
+public class BookingController {
+    private static final String USER_ID = "X-Sharer-User-Id";
+    private final BookingClient bookingClient;
+    private static final String BOOKING_ID = "{booking-id}";
+
+    @GetMapping
+    public ResponseEntity<Object> getBookings(@RequestHeader(USER_ID) Long userId,
+                                              @RequestParam(name = "state", defaultValue = "all") String stateParam,
+                                              @PositiveOrZero @RequestParam(name = "from", defaultValue = "0")
+                                              Integer from,
+                                              @RequestParam(required = false) Integer size) {
+        BookingState state = BookingState.from(stateParam)
+                .orElseThrow(() -> new IllegalArgumentException("Unknown state: " + stateParam));
+        log.info("Get booking with state {}, userId={}, from={}, size={}", stateParam, userId, from, size);
+        return bookingClient.getBookings(userId, state, from, size);
+    }
+
+    @GetMapping("/owner")
+    public ResponseEntity<Object> getBookingsOwner(@RequestParam(name = "state", defaultValue = "all")
+                                                   String stateParam,
+                                                   @RequestHeader(USER_ID) Long userId,
+                                                   @PositiveOrZero @RequestParam(defaultValue = "0") Integer from,
+                                                   @RequestParam(required = false) Integer size) {
+        BookingState state = BookingState.from(stateParam)
+                .orElseThrow(() -> new IllegalArgumentException("Unknown state: " + stateParam));
+        log.info("Получен GET-запрос к эндпоинту: '/bookings/owner' на получение " +
+                "списка всех бронирований вещей пользователя с ID={} с параметром STATE={}", userId, state);
+        return bookingClient.getBookingsOwner(userId, state, from, size);
+    }
+
+    @PostMapping
+    public ResponseEntity<Object> create(@RequestHeader(USER_ID) Long userId,
+                                         @RequestBody @Valid BookItemRequestDto requestDto) {
+        log.info("Creating booking {}, userId={}", requestDto, userId);
+        return bookingClient.create(userId, requestDto);
+    }
+
+    @GetMapping(BOOKING_ID)
+    public ResponseEntity<Object> getBooking(@RequestHeader(USER_ID) Long userId,
+                                             @PathVariable("booking-id") Long bookingId) {
+        log.info("Get booking {}, userId={}", bookingId, userId);
+        return bookingClient.getBooking(userId, bookingId);
+    }
+
+    @ResponseBody
+    @PatchMapping(BOOKING_ID)
+    public ResponseEntity<Object> update(@PathVariable("booking-id") Long bookingId,
+                                         @RequestHeader(USER_ID) Long userId, @RequestParam Boolean approved) {
+        log.info("Получен PATCH-запрос к эндпоинту: '/bookings' на обновление статуса бронирования с ID={}",
+                bookingId);
+        return bookingClient.update(bookingId, userId, approved);
+    }
+}

gateway/src/main/java/ru/practicum/shareit/booking/dto/BookItemRequestDto.java

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+package ru.practicum.shareit.booking.dto;
+
+import java.time.LocalDateTime;
+
+import jakarta.validation.constraints.Future;
+import jakarta.validation.constraints.FutureOrPresent;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.experimental.FieldDefaults;
+
+@Getter
+@NoArgsConstructor
+@AllArgsConstructor
+@FieldDefaults(level = AccessLevel.PRIVATE)
+public class BookItemRequestDto {
+    Long itemId;
+    @FutureOrPresent
+    LocalDateTime start;
+    @Future
+    LocalDateTime end;
+}

gateway/src/main/java/ru/practicum/shareit/booking/dto/BookingState.java

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+package ru.practicum.shareit.booking.dto;
+
+import java.util.Optional;
+
+public enum BookingState {
+    // Все
+    ALL,
+    // Текущие
+    CURRENT,
+    // Будущие
+    FUTURE,
+    // Завершенные
+    PAST,
+    // Отклоненные
+    REJECTED,
+    // Ожидающие подтверждения
+    WAITING;
+
+    public static Optional<BookingState> from(String stringState) {
+        for (BookingState state : values()) {
+            if (state.name().equalsIgnoreCase(stringState)) {
+                return Optional.of(state);
+            }
+        }
+        return Optional.empty();
+    }
+}