mashkova_margarita_lab_3 ready

mashkova_margarita_lab_3/README.md

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+# Лабораторная работа №3
+## ПИбд-42 Машкова Маргарита
+## Задание
+1. Создать 2 микросервиса, реализующих CRUD на связанных сущностях.
+2. Реализовать механизм синхронного обмена сообщениями между микросервисами.
+3. Реализовать шлюз на основе прозрачного прокси-сервера nginx.
+
+## Запуск программы
+В директории с файлом `docker-compose.yml` выполнить команду:
+```
+docker-compose up -d
+```
+
+## Описание работы программы
+
+### 2 микросервиса, реализующих CRUD на связанных сущностях:
+
+#### Описание сущностей:
+- `Groupe` - группа в университете, содержит 2 атрибута: id и name.
+
+P.S. Слово `group` специально написано неправильно, т.к. такое слово зарезервиравано в СУБД :)
+- `Student` - студент, сущность содержит 4 атрибута: id, name, surname, groupeId.
+
+Соответственно сущности связаны один (группа) - ко многим (студенты).
+
+Данные микросервисы, выполняющие CRUD операции над сущностями, реализованы при помощи фреймворка `spring`.
+
+### Реализация механизма синхронного обмена сообщениями между микросервисами:
+Реализуется при помощи `RestTemplate`. При получении информации о студенте или о всех студентах отправляется GET запрос
+к сервису `groupe-service`, чтобы получить информацию о группе, в которой учится студент.
+```
+private final RestTemplate restTemplate = new RestTemplate();
+private final String URL = "http://groupe-service:8080/groupe/";
+
+public StudentInfoDto findStudentInfo(Integer id){
+        Student student = studentRepository.findById(id)
+                .orElseThrow(() -> new RuntimeException(String.format("Student with id %s was not found", id)));
+
+        GroupeInfoDto group = restTemplate.getForObject(URL + student.getGroupeId(), GroupeInfoDto.class);
+
+        StudentInfoDto studentInfoDto = new StudentInfoDto();
+        studentInfoDto.setId(id);
+        studentInfoDto.setName(student.getName());
+        studentInfoDto.setSurname(student.getSurname());
+        studentInfoDto.setGroupeInfoDto(group);
+
+        return studentInfoDto;
+    }
+```
+
+
+### Файл конфигурации `docker-compose.yml`:
+Для обеспечения работы прокси-сервера nginx в качестве шлюза, необходимо чтобы все управляемые им сервисы находились
+в одной сети типа "мост":
+```
+networks:
+  my-network:
+    driver: bridge
+```
+
+#### Настройка сервисов:
+
+Для сервиса БД `db-university` используется образ postgres. Также указывается порт взаимодействия, 
+переменные окружения - логин, пароль для учетной записи в postgres и имя БД. Сервис добавлятся в созданную сеть.
+Опция `restart: always` означает, что docker-compose перезапустит контейнер, если тот вдруг остановится.
+```
+db-university:
+image: postgres:latest
+container_name: db-university
+ports:
+  - 5432:5432
+environment:
+  POSTGRES_PASSWORD: admin
+  POSTGRES_USER: admin
+  POSTGRES_DB: university
+restart: always
+networks:
+  - my-network
+```
+Для сервисов `groupe-service` и `student-service` используются образы приложений, созданные при помощи Dockerfile. 
+Также указывается порт взаимодействия, зависимость от сервиса БД (контейнер микросервиса запускается только 
+после запуска контейнера БД). 
+Сервис добавлятся в созданную сеть.
+Опция `restart: always` означает, что docker-compose перезапустит контейнер, если тот вдруг остановится.
+```
+  groupe-service:
+    build:
+      context: .
+      dockerfile: ./groupe-service/Dockerfile
+    container_name: groupe-service
+    ports:
+      - 8080:8080
+    restart: always
+    depends_on:
+      - db-university
+    networks:
+      - my-network
+
+  student-service:
+    build:
+      context: .
+      dockerfile: ./student-service/Dockerfile
+    container_name: student-service
+    ports:
+      - 8081:8081
+    restart: always
+    depends_on:
+      - db-university
+    networks:
+      - my-network
+```
+
+### Dockerfile сервиса `groupe-service`:
+Используется базовый образ openjdk:17-jdk. Задается рабочая директория /app. В нее копируется jar файл приложения.
+Указывается порт, на котором работает приложение. Запуск программы осуществляется посредством запуска jar файла.
+
+```
+FROM openjdk:17-jdk
+
+WORKDIR /app
+COPY ./groupe-service/build/libs/groupe-service-1.0-SNAPSHOT.jar /app/groupe-service-1.0-SNAPSHOT.jar
+EXPOSE 8080
+
+CMD ["java", "-jar", "groupe-service-1.0-SNAPSHOT.jar"]
+```
+
+### Dockerfile сервиса `student-service`:
+Структура аналогична Dockerfile сервиса `groupe-service`.
+```
+FROM openjdk:17-jdk
+
+WORKDIR /app
+COPY ./student-service/build/libs/student-service-1.0-SNAPSHOT.jar /app/student-service-1.0-SNAPSHOT.jar
+EXPOSE 8081
+
+CMD ["java", "-jar", "student-service-1.0-SNAPSHOT.jar"]
+```
+
+
+### Реализация шлюза на основе прозрачного прокси-сервера nginx:
+
+Для сервиса `nginx` используется образ nginx, указывается порт взаимодействия.
+`volumes` указывает, что при запуске контейнера, локальный файл конфигураций nginx.conf следует поместить вместо
+стандартного файла конфигураций nginx, а `depends_on` указывает, что данный прокси-сервер зависит от обоих сервисов
+и разворачивается только после их запуска.
+
+```
+  nginx:
+    image: nginx
+    container_name: nginx
+    ports:
+      - "80:80"
+    networks:
+      - my-network
+    volumes:
+      - ./nginx-conf:/etc/nginx/conf.d
+    depends_on:
+      - groupe-service
+      - student-service
+```
+
+### Файл конфигурации `nginx.conf`:
+Данная конфигурация позволяет перенаправлять запросы, начинающиеся с `/groupe-service/` на сервер
+groupe-service на порту 8080, а запросы, начинающиеся с `/student-service/`, на сервер student-service на порту 8081.
+Заголовки запроса также передаются и устанавливаются соответствующие значения для Host и X-Forwarded-Prefix.
+Заголовок Host будет установлен в значение $host, заголовок X-Forwarded-Prefix - в значение `/student-service` или
+`/groupe-service`.
+```
+server {
+    listen 80;
+
+    location /groupe-service/ {
+        proxy_pass_request_headers on;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-Prefix '/groupe-service';
+        proxy_pass http://groupe-service:8080/;
+    }
+
+    location /student-service/ {
+        proxy_pass_request_headers on;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-Prefix '/student-service';
+        proxy_pass http://student-service:8081/;
+
+    }
+}
+```
+
+## Запуск сервисов
+
+### Результат выполнения команды `docker-compose up -d`:
+![Вывод в консоли](build_images.png)
+
+### Созданные образы:
+![Созданные образы](images.png)
+
+### Созданные контейнеры:
+![Созданные контейнеры](containers.png)
+
+### Результаты синхронного обмена сообщениями между микросервисами:
+При получения списка студентов, сервис `student-service` обращается к сервису `groupe-service`,
+чтобы отобразить данные группы.
+![results](results.png)
+
+Ссылка на видео:
+https://youtu.be/BCF0Lxc6veo

mashkova_margarita_lab_3/docker-compose.yml

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+version: '3'
+
+networks:
+  my-network:
+    driver: bridge
+
+services:
+  db-university:
+    image: postgres:latest
+    container_name: db-university
+    ports:
+      - 5432:5432
+    environment:
+      POSTGRES_PASSWORD: admin
+      POSTGRES_USER: admin
+      POSTGRES_DB: university
+    restart: always
+    networks:
+      - my-network
+
+  groupe-service:
+    build:
+      context: .
+      dockerfile: ./groupe-service/Dockerfile
+    container_name: groupe-service
+    ports:
+      - 8080:8080
+    restart: always
+    depends_on:
+      - db-university
+    networks:
+      - my-network
+
+  student-service:
+    build:
+      context: .
+      dockerfile: ./student-service/Dockerfile
+    container_name: student-service
+    ports:
+      - 8081:8081
+    restart: always
+    depends_on:
+      - db-university
+    networks:
+      - my-network
+
+  nginx:
+    image: nginx
+    container_name: nginx
+    ports:
+      - "80:80"
+    networks:
+      - my-network
+    volumes:
+      - ./nginx-conf:/etc/nginx/conf.d
+    depends_on:
+      - groupe-service
+      - student-service

mashkova_margarita_lab_3/groupe-service/.gitignore

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+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

mashkova_margarita_lab_3/groupe-service/Dockerfile

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+FROM openjdk:17-jdk
+
+WORKDIR /app
+COPY ./groupe-service/build/libs/groupe-service-1.0-SNAPSHOT.jar /app/groupe-service-1.0-SNAPSHOT.jar
+EXPOSE 8080
+
+CMD ["java", "-jar", "groupe-service-1.0-SNAPSHOT.jar"]

mashkova_margarita_lab_3/groupe-service/build.gradle

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+plugins {
+    id 'java'
+    id 'org.springframework.boot' version '3.0.0'
+    id 'io.spring.dependency-management' version '1.1.0'
+}
+
+group 'org.example'
+version '1.0-SNAPSHOT'
+
+configurations {
+    compileOnly {
+        extendsFrom annotationProcessor
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    implementation 'org.springframework.boot:spring-boot-starter-web'
+    implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.0.3'
+    implementation 'org.mapstruct:mapstruct:1.5.3.Final'
+
+    compileOnly 'org.projectlombok:lombok'
+    annotationProcessor 'org.projectlombok:lombok'
+    runtimeOnly 'org.postgresql:postgresql'
+    annotationProcessor 'org.mapstruct:mapstruct-processor:1.5.3.Final'
+
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1'
+}
+
+test {
+    useJUnitPlatform()
+}

mashkova_margarita_lab_3/groupe-service/gradlew

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+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

mashkova_margarita_lab_3/groupe-service/gradlew.bat

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+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

mashkova_margarita_lab_3/groupe-service/settings.gradle

@@ -0,0 +1,2 @@
+rootProject.name = 'groupe-service'
+

mashkova_margarita_lab_3/groupe-service/src/main/java/org/example/GroupeApplication.java

@@ -0,0 +1,11 @@
+package org.example;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class GroupeApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(GroupeApplication.class, args);
+    }
+}

mashkova_margarita_lab_3/groupe-service/src/main/java/org/example/controller/GroupeController.java

@@ -0,0 +1,45 @@
+package org.example.controller;
+
+import org.example.dto.GroupeDto;
+import org.example.mapper.GroupeMapper;
+import org.example.service.GroupeService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/groupe")
+public class GroupeController {
+    @Autowired
+    private GroupeService groupeService;
+    @Autowired
+    private GroupeMapper groupeMapper;
+
+    @GetMapping("/")
+    public List<GroupeDto> getGroups() {
+        return groupeService.findAllGroups().stream()
+                .map(groupe -> groupeMapper.toGroupeDto(groupe))
+                .toList();
+    }
+
+    @GetMapping("/{id}")
+    public GroupeDto getGroup(@PathVariable Integer id){
+        return groupeMapper.toGroupeDto(groupeService.findGroup(id));
+    }
+
+    @PostMapping
+    public GroupeDto createGroup(@RequestBody GroupeDto groupeDto){
+        return groupeMapper.toGroupeDto(groupeService.addGroup(groupeDto.getId(), groupeDto.getName()));
+    }
+
+    @PutMapping("/{id}")
+    public GroupeDto editGroup(@RequestBody GroupeDto groupeDto){
+        return groupeMapper.toGroupeDto(groupeService.updateGroup(groupeDto.getId(), groupeDto.getName()));
+    }
+
+    @DeleteMapping("/{id}")
+    public void deleteGroup(@PathVariable Integer id){
+        groupeService.deleteGroup(id);
+    }
+}

mashkova_margarita_lab_3/groupe-service/src/main/java/org/example/dto/GroupeDto.java

@@ -0,0 +1,9 @@
+package org.example.dto;
+
+import lombok.Data;
+
+@Data
+public class GroupeDto {
+    private Integer id;
+    private String name;
+}

mashkova_margarita_lab_3/groupe-service/src/main/java/org/example/mapper/GroupeMapper.java

@@ -0,0 +1,12 @@
+package org.example.mapper;
+
+import org.example.dto.GroupeDto;
+import org.example.model.Groupe;
+import org.mapstruct.Mapper;
+import org.mapstruct.ReportingPolicy;
+
+@Mapper(componentModel = "spring", unmappedTargetPolicy = ReportingPolicy.IGNORE)
+public interface GroupeMapper {
+    Groupe fromGroupeDto(GroupeDto groupeDto);
+    GroupeDto toGroupeDto(Groupe groupe);
+}

mashkova_margarita_lab_3/groupe-service/src/main/java/org/example/model/Groupe.java

@@ -0,0 +1,20 @@
+package org.example.model;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import lombok.*;
+
+@Data
+@NoArgsConstructor
+@RequiredArgsConstructor
+@AllArgsConstructor
+@Entity
+public class Groupe {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Integer id;
+    @NonNull
+    private String name;
+}

mashkova_margarita_lab_3/groupe-service/src/main/java/org/example/repository/GroupeRepository.java

@@ -0,0 +1,7 @@
+package org.example.repository;
+
+import org.example.model.Groupe;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface GroupeRepository extends JpaRepository<Groupe, Integer> {
+}

mashkova_margarita_lab_3/groupe-service/src/main/java/org/example/service/GroupeService.java

@@ -0,0 +1,47 @@
+package org.example.service;
+
+import org.example.model.Groupe;
+import org.example.repository.GroupeRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class GroupeService {
+    @Autowired
+    private GroupeRepository groupeRepository;
+
+    @Transactional(readOnly = true)
+    public List<Groupe> findAllGroups(){
+        return groupeRepository.findAll();
+    }
+
+    @Transactional(readOnly = true)
+    public Groupe findGroup(Integer id){
+        final Optional<Groupe> group = groupeRepository.findById(id);
+        return group.orElseThrow(() -> new RuntimeException(String.format("Group with id %s was not found", id)));
+    }
+
+    @Transactional
+    public Groupe addGroup(Integer id, String name){
+        Groupe group = new Groupe(id, name);
+        return groupeRepository.save(group);
+    }
+
+    @Transactional
+    public Groupe updateGroup(Integer id, String name){
+        final Groupe group = findGroup(id);
+        group.setName(name);
+        return groupeRepository.save(group);
+    }
+
+    @Transactional
+    public Groupe deleteGroup(Integer id){
+        Groupe group = findGroup(id);
+        groupeRepository.delete(group);
+        return group;
+    }
+}

mashkova_margarita_lab_3/groupe-service/src/main/resources/application.yml

@@ -0,0 +1,11 @@
+server:
+  port: "8080"
+spring:
+  datasource:
+    url: jdbc:postgresql://db-university:5432/university
+    username: admin
+    password: admin
+    driver-class-name: org.postgresql.Driver
+  jpa:
+    hibernate:
+      ddl-auto: update

mashkova_margarita_lab_3/nginx-conf/nginx.conf

@@ -0,0 +1,18 @@
+server {
+    listen 80;
+
+    location /groupe-service/ {
+        proxy_pass_request_headers on;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-Prefix '/groupe-service';
+        proxy_pass http://groupe-service:8080/;
+    }
+
+    location /student-service/ {
+        proxy_pass_request_headers on;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-Prefix '/student-service';
+        proxy_pass http://student-service:8081/;
+
+    }
+}

mashkova_margarita_lab_3/student-service/.gitignore

@@ -0,0 +1,37 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

mashkova_margarita_lab_3/student-service/Dockerfile

@@ -0,0 +1,7 @@
+FROM openjdk:17-jdk
+
+WORKDIR /app
+COPY ./student-service/build/libs/student-service-1.0-SNAPSHOT.jar /app/student-service-1.0-SNAPSHOT.jar
+EXPOSE 8081
+
+CMD ["java", "-jar", "student-service-1.0-SNAPSHOT.jar"]

mashkova_margarita_lab_3/student-service/build.gradle

@@ -0,0 +1,37 @@
+plugins {
+    id 'java'
+    id 'org.springframework.boot' version '3.0.0'
+    id 'io.spring.dependency-management' version '1.1.0'
+}
+
+group 'org.example'
+version '1.0-SNAPSHOT'
+
+configurations {
+    compileOnly {
+        extendsFrom annotationProcessor
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    implementation 'org.springframework.boot:spring-boot-starter-web'
+    implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.0.3'
+    implementation 'org.mapstruct:mapstruct:1.5.3.Final'
+
+    compileOnly 'org.projectlombok:lombok'
+    annotationProcessor 'org.projectlombok:lombok'
+    runtimeOnly 'org.postgresql:postgresql'
+    annotationProcessor 'org.mapstruct:mapstruct-processor:1.5.3.Final'
+
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1'
+}
+
+test {
+    useJUnitPlatform()
+}

mashkova_margarita_lab_3/student-service/gradlew

@@ -0,0 +1,240 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

mashkova_margarita_lab_3/student-service/gradlew.bat

@@ -0,0 +1,91 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

mashkova_margarita_lab_3/student-service/settings.gradle

@@ -0,0 +1,2 @@
+rootProject.name = 'student-service'
+

mashkova_margarita_lab_3/student-service/src/main/java/org/example/StudentApplication.java

@@ -0,0 +1,11 @@
+package org.example;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class StudentApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(StudentApplication.class, args);
+    }
+}

mashkova_margarita_lab_3/student-service/src/main/java/org/example/controller/StudentController.java

@@ -0,0 +1,49 @@
+package org.example.controller;
+
+import org.example.dto.StudentDto;
+import org.example.dto.StudentInfoDto;
+import org.example.mapper.StudentMapper;
+import org.example.service.StudentService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/student")
+public class StudentController {
+    @Autowired
+    private StudentService studentService;
+
+    @Autowired
+    private StudentMapper studentMapper;
+
+    @GetMapping("/")
+    public List<StudentInfoDto> getStudents(){
+        return studentService.findAllStudents();
+    }
+
+    @GetMapping("/{id}")
+    public StudentInfoDto getStudent(@PathVariable Integer id){
+        return studentService.findStudentInfo(id);
+    }
+
+    @PostMapping
+    public StudentDto createStudent(@RequestBody StudentDto studentDto){
+        return studentMapper.toStudentDto(
+                studentService.addStudent(studentDto.getId(), studentDto.getName(), studentDto.getSurname(),
+                        studentDto.getGroupeId()));
+    }
+
+    @PutMapping("/{id}")
+    public StudentDto editStudent(@RequestBody StudentDto studentDto){
+        return studentMapper.toStudentDto(
+                studentService.updateStudent(studentDto.getId(), studentDto.getName(), studentDto.getSurname(),
+                        studentDto.getGroupeId()));
+    }
+
+    @DeleteMapping("/{id}")
+    public void deleteStudent(@PathVariable Integer id){
+        studentService.deleteStudent(id);
+    }
+}

mashkova_margarita_lab_3/student-service/src/main/java/org/example/dto/GroupeInfoDto.java

@@ -0,0 +1,9 @@
+package org.example.dto;
+
+import lombok.Data;
+
+@Data
+public class GroupeInfoDto {
+    private Integer id;
+    private String name;
+}

mashkova_margarita_lab_3/student-service/src/main/java/org/example/dto/StudentDto.java

@@ -0,0 +1,11 @@
+package org.example.dto;
+
+import lombok.Data;
+
+@Data
+public class StudentDto {
+    private Integer id;
+    private String name;
+    private String surname;
+    private Integer groupeId;
+}

mashkova_margarita_lab_3/student-service/src/main/java/org/example/dto/StudentInfoDto.java

@@ -0,0 +1,11 @@
+package org.example.dto;
+
+import lombok.Data;
+
+@Data
+public class StudentInfoDto {
+    private Integer id;
+    private String name;
+    private String surname;
+    private GroupeInfoDto groupeInfoDto;
+}

mashkova_margarita_lab_3/student-service/src/main/java/org/example/mapper/StudentMapper.java

@@ -0,0 +1,12 @@
+package org.example.mapper;
+
+import org.example.dto.StudentDto;
+import org.example.model.Student;
+import org.mapstruct.Mapper;
+import org.mapstruct.ReportingPolicy;
+
+@Mapper(componentModel = "spring", unmappedTargetPolicy = ReportingPolicy.IGNORE)
+public interface StudentMapper {
+    Student fromStudentDto(StudentDto studentDto);
+    StudentDto toStudentDto(Student student);
+}

mashkova_margarita_lab_3/student-service/src/main/java/org/example/model/Student.java

@@ -0,0 +1,24 @@
+package org.example.model;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import lombok.*;
+import org.example.dto.GroupeInfoDto;
+
+@Data
+@NoArgsConstructor
+@RequiredArgsConstructor
+@AllArgsConstructor
+@Entity
+public class Student {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Integer id;
+    @NonNull
+    private String name;
+    @NonNull
+    private String surname;
+    private Integer groupeId;
+}

mashkova_margarita_lab_3/student-service/src/main/java/org/example/repository/StudentRepository.java

@@ -0,0 +1,7 @@
+package org.example.repository;
+
+import org.example.model.Student;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface StudentRepository extends JpaRepository<Student, Integer> {
+}

mashkova_margarita_lab_3/student-service/src/main/java/org/example/service/StudentService.java

@@ -0,0 +1,79 @@
+package org.example.service;
+
+import org.example.dto.GroupeInfoDto;
+import org.example.dto.StudentInfoDto;
+import org.example.model.Student;
+import org.example.repository.StudentRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class StudentService {
+    @Autowired
+    private StudentRepository studentRepository;
+
+    private final RestTemplate restTemplate = new RestTemplate();
+    private final String URL = "http://groupe-service:8080/groupe/";
+
+    @Transactional(readOnly = true)
+    public List<StudentInfoDto> findAllStudents(){
+        List <Student> students = studentRepository.findAll();
+        List <StudentInfoDto> studentsInfo = new ArrayList<>();
+        for (Student student : students) {
+            StudentInfoDto studentInfo = findStudentInfo(student.getId());
+            studentsInfo.add(studentInfo);
+        }
+        return studentsInfo;
+    }
+
+    @Transactional(readOnly = true)
+    public Student findStudent(Integer id){
+        final Optional<Student> student = studentRepository.findById(id);
+        return student.orElseThrow(() -> new RuntimeException(String.format("Student with id %s was not found", id)));
+    }
+
+    @Transactional(readOnly = true)
+    public StudentInfoDto findStudentInfo(Integer id){
+        Student student = studentRepository.findById(id)
+                .orElseThrow(() -> new RuntimeException(String.format("Student with id %s was not found", id)));
+
+        GroupeInfoDto group = restTemplate.getForObject(URL + student.getGroupeId(), GroupeInfoDto.class);
+
+        StudentInfoDto studentInfoDto = new StudentInfoDto();
+        studentInfoDto.setId(id);
+        studentInfoDto.setName(student.getName());
+        studentInfoDto.setSurname(student.getSurname());
+        studentInfoDto.setGroupeInfoDto(group);
+
+        return studentInfoDto;
+    }
+
+    @Transactional
+    public Student addStudent(Integer id, String name, String surname, Integer groupeId){
+        Student student = new Student(id, name, surname, groupeId);
+        return studentRepository.save(student);
+    }
+
+    @Transactional
+    public Student updateStudent(Integer id, String name, String surname, Integer groupeId){
+        Student student = findStudent(id);
+        student.setName(name);
+        student.setSurname(surname);
+        student.setGroupeId(groupeId);
+        return studentRepository.save(student);
+    }
+
+    @Transactional
+    public Student deleteStudent(Integer id){
+        Student student = findStudent(id);
+        studentRepository.delete(student);
+        return student;
+    }
+}

mashkova_margarita_lab_3/student-service/src/main/resources/application.yml

@@ -0,0 +1,11 @@
+server:
+  port: "8081"
+spring:
+  datasource:
+    url: jdbc:postgresql://db-university:5432/university
+    username: admin
+    password: admin
+    driver-class-name: org.postgresql.Driver
+  jpa:
+    hibernate:
+      ddl-auto: update