первая лаба

2025-09-05 21:46:02 +04:00
parent 743b7c1c6a
commit 12007bd3ea
27 changed files with 1783 additions and 5 deletions
--- a/demo/.gitattributes
+++ b/demo/.gitattributes
@@ -0,0 +1,3 @@
+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary
--- a/demo/.gitignore
+++ b/demo/.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/
--- a/demo/build.gradle
+++ b/demo/build.gradle
@@ -0,0 +1,30 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.2.0'
+	id 'io.spring.dependency-management' version '1.1.4'
+}
+
+group = 'com.example'
+version = '0.0.1-SNAPSHOT'
+description = 'Demo project for Spring Boot'
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(21)
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.2.0'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}
--- a/demo/gradle/wrapper/gradle-wrapper.jar
+++ b/demo/gradle/wrapper/gradle-wrapper.jar
--- a/demo/gradle/wrapper/gradle-wrapper.properties
+++ b/demo/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
--- a/demo/gradlew
+++ b/demo/gradlew
@@ -0,0 +1,251 @@
+#!/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.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   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/HEAD/platforms/jvm/plugins-application/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
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# 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 "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH="\\\"\\\""
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$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: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$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
+
+
+# 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"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# 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 "$JAVACMD" "$@"
--- a/demo/gradlew.bat
+++ b/demo/gradlew.bat
@@ -0,0 +1,94 @@
+@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
+@rem SPDX-License-Identifier: Apache-2.0
+@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=.
+@rem This is normally unused
+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. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+: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
--- a/demo/settings.gradle
+++ b/demo/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'demo'
--- a/demo/src/main/java/com/example/demo/DemoApplication.java
+++ b/demo/src/main/java/com/example/demo/DemoApplication.java
@@ -0,0 +1,13 @@
+package com.example.demo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class DemoApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(DemoApplication.class, args);
+	}
+
+}
--- a/demo/src/main/java/com/example/demo/config/CorsConfig.java
+++ b/demo/src/main/java/com/example/demo/config/CorsConfig.java
@@ -0,0 +1,26 @@
+package com.example.demo.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.cors.CorsConfiguration;
+import org.springframework.web.cors.CorsConfigurationSource;
+import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
+
+import java.util.Arrays;
+
+@Configuration
+public class CorsConfig {
+
+    @Bean
+    public CorsConfigurationSource corsConfigurationSource() {
+        CorsConfiguration configuration = new CorsConfiguration();
+        configuration.setAllowedOriginPatterns(Arrays.asList("*"));
+        configuration.setAllowedMethods(Arrays.asList("GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"));
+        configuration.setAllowedHeaders(Arrays.asList("*"));
+        configuration.setAllowCredentials(true);
+        
+        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
+        source.registerCorsConfiguration("/**", configuration);
+        return source;
+    }
+}
--- a/demo/src/main/java/com/example/demo/config/OpenApiConfig.java
+++ b/demo/src/main/java/com/example/demo/config/OpenApiConfig.java
@@ -0,0 +1,23 @@
+package com.example.demo.config;
+
+import io.swagger.v3.oas.models.OpenAPI;
+import io.swagger.v3.oas.models.info.Info;
+import io.swagger.v3.oas.models.info.Contact;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class OpenApiConfig {
+
+    @Bean
+    public OpenAPI customOpenAPI() {
+        return new OpenAPI()
+                .info(new Info()
+                        .title("Punk Rock API")
+                        .version("1.0.0")
+                        .description("REST API для управления данными о панк-рок исполнителях")
+                        .contact(new Contact()
+                                .name("Developer")
+                                .email("developer@example.com")));
+    }
+}
--- a/demo/src/main/java/com/example/demo/controller/AlbumController.java
+++ b/demo/src/main/java/com/example/demo/controller/AlbumController.java
@@ -0,0 +1,70 @@
+package com.example.demo.controller;
+
+import com.example.demo.dto.AlbumDto;
+import org.springframework.web.bind.annotation.*;
+import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
+
+@RestController
+@RequestMapping("/api")
+public class AlbumController {
+    
+    private final Map<Integer, AlbumDto> albums = new LinkedHashMap<>();
+    private final AtomicInteger idCounter = new AtomicInteger(1);
+
+    public AlbumController() {
+        // Инициализация пустой коллекцией (как в db.json)
+    }
+
+    @GetMapping("/albums")
+    public List<AlbumDto> getAllAlbums() {
+        return new ArrayList<>(albums.values());
+    }
+
+    @GetMapping("/albums/{id}")
+    public AlbumDto getAlbumById(@PathVariable Integer id) {
+        return albums.get(id);
+    }
+
+    @PostMapping("/albums")
+    public AlbumDto createAlbum(@RequestBody AlbumDto album) {
+        Integer newId = idCounter.getAndIncrement();
+        album.setId(newId);
+        albums.put(newId, album);
+        return album;
+    }
+
+    @PutMapping("/albums/{id}")
+    public AlbumDto updateAlbum(@PathVariable Integer id, @RequestBody AlbumDto album) {
+        if (albums.containsKey(id)) {
+            album.setId(id);
+            albums.put(id, album);
+            return album;
+        }
+        return null;
+    }
+
+    @PatchMapping("/albums/{id}")
+    public AlbumDto patchAlbum(@PathVariable Integer id, @RequestBody Map<String, Object> updates) {
+        AlbumDto existingAlbum = albums.get(id);
+        if (existingAlbum != null) {
+            if (updates.containsKey("artistId")) {
+                existingAlbum.setArtistId((Integer) updates.get("artistId"));
+            }
+            if (updates.containsKey("title")) {
+                existingAlbum.setTitle((String) updates.get("title"));
+            }
+            if (updates.containsKey("year")) {
+                existingAlbum.setYear((Integer) updates.get("year"));
+            }
+            albums.put(id, existingAlbum);
+            return existingAlbum;
+        }
+        return null;
+    }
+
+    @DeleteMapping("/albums/{id}")
+    public boolean deleteAlbum(@PathVariable Integer id) {
+        return albums.remove(id) != null;
+    }
+}
--- a/demo/src/main/java/com/example/demo/controller/ArtistController.java
+++ b/demo/src/main/java/com/example/demo/controller/ArtistController.java
@@ -0,0 +1,79 @@
+package com.example.demo.controller;
+
+import com.example.demo.dto.ArtistDto;
+import org.springframework.web.bind.annotation.*;
+import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
+
+@RestController
+@RequestMapping("/api")
+@CrossOrigin(origins = "*")
+public class ArtistController {
+    
+    private final Map<String, ArtistDto> artists = new LinkedHashMap<>();
+    private final AtomicInteger idCounter = new AtomicInteger(1);
+
+    public ArtistController() {
+        // Инициализация предопределенными данными
+        artists.put("9daa", new ArtistDto("9daa", "testlabуцк", "sadууу", 2, 3));
+        artists.put("98ad", new ArtistDto("98ad", "ыфвфы", "выфв", 1, 1));
+        artists.put("dd28", new ArtistDto("dd28", "аааа", "ааа", 2, 3));
+        artists.put("b499", new ArtistDto("b499", "бб", "уафв", 1, 3));
+        artists.put("0f62", new ArtistDto("0f62", "Максим", "2", 2, 1));
+    }
+
+    @GetMapping("/artists")
+    public List<ArtistDto> getAllArtists() {
+        return new ArrayList<>(artists.values());
+    }
+
+    @GetMapping("/artists/{id}")
+    public ArtistDto getArtistById(@PathVariable String id) {
+        return artists.get(id);
+    }
+
+    @PostMapping("/artists")
+    public ArtistDto createArtist(@RequestBody ArtistDto artist) {
+        String newId = String.valueOf(idCounter.getAndIncrement());
+        artist.setId(newId);
+        artists.put(newId, artist);
+        return artist;
+    }
+
+    @PutMapping("/artists/{id}")
+    public ArtistDto updateArtist(@PathVariable String id, @RequestBody ArtistDto artist) {
+        if (artists.containsKey(id)) {
+            artist.setId(id);
+            artists.put(id, artist);
+            return artist;
+        }
+        return null;
+    }
+
+    @PatchMapping("/artists/{id}")
+    public ArtistDto patchArtist(@PathVariable String id, @RequestBody Map<String, Object> updates) {
+        ArtistDto existingArtist = artists.get(id);
+        if (existingArtist != null) {
+            if (updates.containsKey("name")) {
+                existingArtist.setName((String) updates.get("name"));
+            }
+            if (updates.containsKey("description")) {
+                existingArtist.setDescription((String) updates.get("description"));
+            }
+            if (updates.containsKey("epochId")) {
+                existingArtist.setEpochId((Integer) updates.get("epochId"));
+            }
+            if (updates.containsKey("countryId")) {
+                existingArtist.setCountryId((Integer) updates.get("countryId"));
+            }
+            artists.put(id, existingArtist);
+            return existingArtist;
+        }
+        return null;
+    }
+
+    @DeleteMapping("/artists/{id}")
+    public boolean deleteArtist(@PathVariable String id) {
+        return artists.remove(id) != null;
+    }
+}
--- a/demo/src/main/java/com/example/demo/controller/CountryController.java
+++ b/demo/src/main/java/com/example/demo/controller/CountryController.java
@@ -0,0 +1,68 @@
+package com.example.demo.controller;
+
+import com.example.demo.dto.CountryDto;
+import org.springframework.web.bind.annotation.*;
+import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
+
+@RestController
+@RequestMapping("/api")
+@CrossOrigin(origins = "*")
+public class CountryController {
+    
+    private final Map<Integer, CountryDto> countries = new LinkedHashMap<>();
+    private final AtomicInteger idCounter = new AtomicInteger(1);
+
+    public CountryController() {
+        // Инициализация предопределенными данными
+        countries.put(1, new CountryDto(1, "Россия"));
+        countries.put(2, new CountryDto(2, "США"));
+        countries.put(3, new CountryDto(3, "Тайга"));
+    }
+
+    @GetMapping("/countries")
+    public List<CountryDto> getAllCountries() {
+        return new ArrayList<>(countries.values());
+    }
+
+    @GetMapping("/countries/{id}")
+    public CountryDto getCountryById(@PathVariable Integer id) {
+        return countries.get(id);
+    }
+
+    @PostMapping("/countries")
+    public CountryDto createCountry(@RequestBody CountryDto country) {
+        Integer newId = idCounter.getAndIncrement();
+        country.setId(newId);
+        countries.put(newId, country);
+        return country;
+    }
+
+    @PutMapping("/countries/{id}")
+    public CountryDto updateCountry(@PathVariable Integer id, @RequestBody CountryDto country) {
+        if (countries.containsKey(id)) {
+            country.setId(id);
+            countries.put(id, country);
+            return country;
+        }
+        return null;
+    }
+
+    @PatchMapping("/countries/{id}")
+    public CountryDto patchCountry(@PathVariable Integer id, @RequestBody Map<String, Object> updates) {
+        CountryDto existingCountry = countries.get(id);
+        if (existingCountry != null) {
+            if (updates.containsKey("name")) {
+                existingCountry.setName((String) updates.get("name"));
+            }
+            countries.put(id, existingCountry);
+            return existingCountry;
+        }
+        return null;
+    }
+
+    @DeleteMapping("/countries/{id}")
+    public boolean deleteCountry(@PathVariable Integer id) {
+        return countries.remove(id) != null;
+    }
+}
--- a/demo/src/main/java/com/example/demo/controller/EpochController.java
+++ b/demo/src/main/java/com/example/demo/controller/EpochController.java
@@ -0,0 +1,67 @@
+package com.example.demo.controller;
+
+import com.example.demo.dto.EpochDto;
+import org.springframework.web.bind.annotation.*;
+import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
+
+@RestController
+@RequestMapping("/api")
+@CrossOrigin(origins = "*")
+public class EpochController {
+    
+    private final Map<Integer, EpochDto> epochs = new LinkedHashMap<>();
+    private final AtomicInteger idCounter = new AtomicInteger(1);
+
+    public EpochController() {
+        // Инициализация предопределенными данными
+        epochs.put(1, new EpochDto(1, "1980-е"));
+        epochs.put(2, new EpochDto(2, "1990-е"));
+    }
+
+    @GetMapping("/epochs")
+    public List<EpochDto> getAllEpochs() {
+        return new ArrayList<>(epochs.values());
+    }
+
+    @GetMapping("/epochs/{id}")
+    public EpochDto getEpochById(@PathVariable Integer id) {
+        return epochs.get(id);
+    }
+
+    @PostMapping("/epochs")
+    public EpochDto createEpoch(@RequestBody EpochDto epoch) {
+        Integer newId = idCounter.getAndIncrement();
+        epoch.setId(newId);
+        epochs.put(newId, epoch);
+        return epoch;
+    }
+
+    @PutMapping("/epochs/{id}")
+    public EpochDto updateEpoch(@PathVariable Integer id, @RequestBody EpochDto epoch) {
+        if (epochs.containsKey(id)) {
+            epoch.setId(id);
+            epochs.put(id, epoch);
+            return epoch;
+        }
+        return null;
+    }
+
+    @PatchMapping("/epochs/{id}")
+    public EpochDto patchEpoch(@PathVariable Integer id, @RequestBody Map<String, Object> updates) {
+        EpochDto existingEpoch = epochs.get(id);
+        if (existingEpoch != null) {
+            if (updates.containsKey("name")) {
+                existingEpoch.setName((String) updates.get("name"));
+            }
+            epochs.put(id, existingEpoch);
+            return existingEpoch;
+        }
+        return null;
+    }
+
+    @DeleteMapping("/epochs/{id}")
+    public boolean deleteEpoch(@PathVariable Integer id) {
+        return epochs.remove(id) != null;
+    }
+}
--- a/demo/src/main/java/com/example/demo/controller/SongController.java
+++ b/demo/src/main/java/com/example/demo/controller/SongController.java
@@ -0,0 +1,70 @@
+package com.example.demo.controller;
+
+import com.example.demo.dto.SongDto;
+import org.springframework.web.bind.annotation.*;
+import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
+
+@RestController
+@RequestMapping("/api")
+public class SongController {
+    
+    private final Map<Integer, SongDto> songs = new LinkedHashMap<>();
+    private final AtomicInteger idCounter = new AtomicInteger(1);
+
+    public SongController() {
+        // Инициализация пустой коллекцией (как в db.json)
+    }
+
+    @GetMapping("/songs")
+    public List<SongDto> getAllSongs() {
+        return new ArrayList<>(songs.values());
+    }
+
+    @GetMapping("/songs/{id}")
+    public SongDto getSongById(@PathVariable Integer id) {
+        return songs.get(id);
+    }
+
+    @PostMapping("/songs")
+    public SongDto createSong(@RequestBody SongDto song) {
+        Integer newId = idCounter.getAndIncrement();
+        song.setId(newId);
+        songs.put(newId, song);
+        return song;
+    }
+
+    @PutMapping("/songs/{id}")
+    public SongDto updateSong(@PathVariable Integer id, @RequestBody SongDto song) {
+        if (songs.containsKey(id)) {
+            song.setId(id);
+            songs.put(id, song);
+            return song;
+        }
+        return null;
+    }
+
+    @PatchMapping("/songs/{id}")
+    public SongDto patchSong(@PathVariable Integer id, @RequestBody Map<String, Object> updates) {
+        SongDto existingSong = songs.get(id);
+        if (existingSong != null) {
+            if (updates.containsKey("albumId")) {
+                existingSong.setAlbumId((Integer) updates.get("albumId"));
+            }
+            if (updates.containsKey("title")) {
+                existingSong.setTitle((String) updates.get("title"));
+            }
+            if (updates.containsKey("duration")) {
+                existingSong.setDuration((String) updates.get("duration"));
+            }
+            songs.put(id, existingSong);
+            return existingSong;
+        }
+        return null;
+    }
+
+    @DeleteMapping("/songs/{id}")
+    public boolean deleteSong(@PathVariable Integer id) {
+        return songs.remove(id) != null;
+    }
+}
--- a/demo/src/main/java/com/example/demo/dto/AlbumDto.java
+++ b/demo/src/main/java/com/example/demo/dto/AlbumDto.java
@@ -0,0 +1,49 @@
+package com.example.demo.dto;
+
+public class AlbumDto {
+    private Integer id;
+    private Integer artistId;
+    private String title;
+    private Integer year;
+
+    public AlbumDto() {}
+
+    public AlbumDto(Integer id, Integer artistId, String title, Integer year) {
+        this.id = id;
+        this.artistId = artistId;
+        this.title = title;
+        this.year = year;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public Integer getArtistId() {
+        return artistId;
+    }
+
+    public void setArtistId(Integer artistId) {
+        this.artistId = artistId;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public Integer getYear() {
+        return year;
+    }
+
+    public void setYear(Integer year) {
+        this.year = year;
+    }
+}
--- a/demo/src/main/java/com/example/demo/dto/ArtistDto.java
+++ b/demo/src/main/java/com/example/demo/dto/ArtistDto.java
@@ -0,0 +1,59 @@
+package com.example.demo.dto;
+
+public class ArtistDto {
+    private String id;
+    private String name;
+    private String description;
+    private Integer epochId;
+    private Integer countryId;
+
+    public ArtistDto() {}
+
+    public ArtistDto(String id, String name, String description, Integer epochId, Integer countryId) {
+        this.id = id;
+        this.name = name;
+        this.description = description;
+        this.epochId = epochId;
+        this.countryId = countryId;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public Integer getEpochId() {
+        return epochId;
+    }
+
+    public void setEpochId(Integer epochId) {
+        this.epochId = epochId;
+    }
+
+    public Integer getCountryId() {
+        return countryId;
+    }
+
+    public void setCountryId(Integer countryId) {
+        this.countryId = countryId;
+    }
+}
--- a/demo/src/main/java/com/example/demo/dto/CountryDto.java
+++ b/demo/src/main/java/com/example/demo/dto/CountryDto.java
@@ -0,0 +1,29 @@
+package com.example.demo.dto;
+
+public class CountryDto {
+    private Integer id;
+    private String name;
+
+    public CountryDto() {}
+
+    public CountryDto(Integer id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
--- a/demo/src/main/java/com/example/demo/dto/EpochDto.java
+++ b/demo/src/main/java/com/example/demo/dto/EpochDto.java
@@ -0,0 +1,29 @@
+package com.example.demo.dto;
+
+public class EpochDto {
+    private Integer id;
+    private String name;
+
+    public EpochDto() {}
+
+    public EpochDto(Integer id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
--- a/demo/src/main/java/com/example/demo/dto/SongDto.java
+++ b/demo/src/main/java/com/example/demo/dto/SongDto.java
@@ -0,0 +1,49 @@
+package com.example.demo.dto;
+
+public class SongDto {
+    private Integer id;
+    private Integer albumId;
+    private String title;
+    private String duration;
+
+    public SongDto() {}
+
+    public SongDto(Integer id, Integer albumId, String title, String duration) {
+        this.id = id;
+        this.albumId = albumId;
+        this.title = title;
+        this.duration = duration;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public Integer getAlbumId() {
+        return albumId;
+    }
+
+    public void setAlbumId(Integer albumId) {
+        this.albumId = albumId;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getDuration() {
+        return duration;
+    }
+
+    public void setDuration(String duration) {
+        this.duration = duration;
+    }
+}
--- a/demo/src/main/resources/application.properties
+++ b/demo/src/main/resources/application.properties
@@ -0,0 +1,4 @@
+spring.application.name=demo
+server.port=8080
+springdoc.api-docs.path=/api-docs
+springdoc.swagger-ui.path=/swagger-ui.html
--- a/demo/src/test/java/com/example/demo/DemoApplicationTests.java
+++ b/demo/src/test/java/com/example/demo/DemoApplicationTests.java
@@ -0,0 +1,13 @@
+package com.example.demo;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class DemoApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}
--- a/punkrock-react/db.json
+++ b/punkrock-react/db.json
@@ -27,6 +27,13 @@
      "description": "уафв",
      "epochId": 1,
      "countryId": 3
+    },
+    {
+      "id": "0f62",
+      "name": "Максим",
+      "description": "2",
+      "epochId": 2,
+      "countryId": 1
    }
  ],
  "countries": [
--- a/punkrock-react/package-lock.json
+++ b/punkrock-react/package-lock.json
@@ -21,6 +21,10 @@
        "react-router-dom": "^7.6.0",
        "react-scripts": "5.0.1",
        "web-vitals": "^2.1.4"
+      },
+      "devDependencies": {
+        "concurrently": "^9.2.1",
+        "json-server": "^1.0.0-beta.3"
      }
    },
    "node_modules/@adobe/css-tools": {
@@ -3092,6 +3096,13 @@
        }
      }
    },
+    "node_modules/@polka/url": {
+      "version": "1.0.0-next.29",
+      "resolved": "https://registry.npmjs.org/@polka/url/-/url-1.0.0-next.29.tgz",
+      "integrity": "sha512-wwQAWhWSuHaag8c4q/KN/vCoeOJYshAIvMQwD4GpSb3OiZklFfvAgmj0VCBBImRpuF/aFgIRzllXlVX93Jevww==",
+      "dev": true,
+      "license": "MIT"
+    },
    "node_modules/@popperjs/core": {
      "version": "2.11.8",
      "resolved": "https://registry.npmjs.org/@popperjs/core/-/core-2.11.8.tgz",
@@ -3560,6 +3571,327 @@
        "@testing-library/dom": ">=7.21.4"
      }
    },
+    "node_modules/@tinyhttp/accepts": {
+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/@tinyhttp/accepts/-/accepts-2.2.3.tgz",
+      "integrity": "sha512-9pQN6pJAJOU3McmdJWTcyq7LLFW8Lj5q+DadyKcvp+sxMkEpktKX5sbfJgJuOvjk6+1xWl7pe0YL1US1vaO/1w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "mime": "4.0.4",
+        "negotiator": "^0.6.3"
+      },
+      "engines": {
+        "node": ">=12.20.0"
+      },
+      "funding": {
+        "type": "individual",
+        "url": "https://github.com/tinyhttp/tinyhttp?sponsor=1"
+      }
+    },
+    "node_modules/@tinyhttp/accepts/node_modules/mime": {
+      "version": "4.0.4",
+      "resolved": "https://registry.npmjs.org/mime/-/mime-4.0.4.tgz",
+      "integrity": "sha512-v8yqInVjhXyqP6+Kw4fV3ZzeMRqEW6FotRsKXjRS5VMTNIuXsdRoAvklpoRgSqXm6o9VNH4/C0mgedko9DdLsQ==",
+      "dev": true,
+      "funding": [
+        "https://github.com/sponsors/broofa"
+      ],
+      "license": "MIT",
+      "bin": {
+        "mime": "bin/cli.js"
+      },
+      "engines": {
+        "node": ">=16"
+      }
+    },
+    "node_modules/@tinyhttp/app": {
+      "version": "2.5.2",
+      "resolved": "https://registry.npmjs.org/@tinyhttp/app/-/app-2.5.2.tgz",
+      "integrity": "sha512-DcB3Y8GQppLQlO2VxRYF7LzTEAoZb+VRQXuIsErcu2fNaM1xdx6NQZDso5rlZUiaeg6KYYRfU34N4XkZbv6jSA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@tinyhttp/cookie": "2.1.1",
+        "@tinyhttp/proxy-addr": "2.2.1",
+        "@tinyhttp/req": "2.2.5",
+        "@tinyhttp/res": "2.2.5",
+        "@tinyhttp/router": "2.2.3",
+        "header-range-parser": "1.1.3",
+        "regexparam": "^2.0.2"
+      },
+      "engines": {
+        "node": ">=14.21.3"
+      },
+      "funding": {
+        "type": "individual",
+        "url": "https://github.com/tinyhttp/tinyhttp?sponsor=1"
+      }
+    },
+    "node_modules/@tinyhttp/content-disposition": {
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/@tinyhttp/content-disposition/-/content-disposition-2.2.2.tgz",
+      "integrity": "sha512-crXw1txzrS36huQOyQGYFvhTeLeG0Si1xu+/l6kXUVYpE0TjFjEZRqTbuadQLfKGZ0jaI+jJoRyqaWwxOSHW2g==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12.20.0"
+      },
+      "funding": {
+        "type": "individual",
+        "url": "https://github.com/tinyhttp/tinyhttp?sponsor=1"
+      }
+    },
+    "node_modules/@tinyhttp/content-type": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/@tinyhttp/content-type/-/content-type-0.1.4.tgz",
+      "integrity": "sha512-dl6f3SHIJPYbhsW1oXdrqOmLSQF/Ctlv3JnNfXAE22kIP7FosqJHxkz/qj2gv465prG8ODKH5KEyhBkvwrueKQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12.4"
+      }
+    },
+    "node_modules/@tinyhttp/cookie": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/@tinyhttp/cookie/-/cookie-2.1.1.tgz",
+      "integrity": "sha512-h/kL9jY0e0Dvad+/QU3efKZww0aTvZJslaHj3JTPmIPC9Oan9+kYqmh3M6L5JUQRuTJYFK2nzgL2iJtH2S+6dA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12.20.0"
+      },
+      "funding": {
+        "type": "individual",
+        "url": "https://github.com/tinyhttp/tinyhttp?sponsor=1"
+      }
+    },
+    "node_modules/@tinyhttp/cookie-signature": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/@tinyhttp/cookie-signature/-/cookie-signature-2.1.1.tgz",
+      "integrity": "sha512-VDsSMY5OJfQJIAtUgeQYhqMPSZptehFSfvEEtxr+4nldPA8IImlp3QVcOVuK985g4AFR4Hl1sCbWCXoqBnVWnw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12.20.0"
+      }
+    },
+    "node_modules/@tinyhttp/cors": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/@tinyhttp/cors/-/cors-2.0.1.tgz",
+      "integrity": "sha512-qrmo6WJuaiCzKWagv2yA/kw6hIISfF/hOqPWwmI6w0o8apeTMmRN3DoCFvQ/wNVuWVdU5J4KU7OX8aaSOEq51A==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@tinyhttp/vary": "^0.1.3"
+      },
+      "engines": {
+        "node": ">=12.20 || 14.x || >=16"
+      }
+    },
+    "node_modules/@tinyhttp/encode-url": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/@tinyhttp/encode-url/-/encode-url-2.1.1.tgz",
+      "integrity": "sha512-AhY+JqdZ56qV77tzrBm0qThXORbsVjs/IOPgGCS7x/wWnsa/Bx30zDUU/jPAUcSzNOzt860x9fhdGpzdqbUeUw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12.20.0"
+      }
+    },
+    "node_modules/@tinyhttp/etag": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/@tinyhttp/etag/-/etag-2.1.2.tgz",
+      "integrity": "sha512-j80fPKimGqdmMh6962y+BtQsnYPVCzZfJw0HXjyH70VaJBHLKGF+iYhcKqzI3yef6QBNa8DKIPsbEYpuwApXTw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12.20.0"
+      }
+    },
+    "node_modules/@tinyhttp/forwarded": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/@tinyhttp/forwarded/-/forwarded-2.1.2.tgz",
+      "integrity": "sha512-9H/eulJ68ElY/+zYpTpNhZ7vxGV+cnwaR6+oQSm7bVgZMyuQfgROW/qvZuhmgDTIxnGMXst+Ba4ij6w6Krcs3w==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12.20.0"
+      }
+    },
+    "node_modules/@tinyhttp/logger": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/@tinyhttp/logger/-/logger-2.1.0.tgz",
+      "integrity": "sha512-Ma1fJ9CwUbn9r61/4HW6+nflsVoslpOnCrfQ6UeZq7GGIgwLzofms3HoSVG7M+AyRMJpxlfcDdbH5oFVroDMKA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "colorette": "^2.0.20",
+        "dayjs": "^1.11.13",
+        "http-status-emojis": "^2.2.0"
+      },
+      "engines": {
+        "node": ">=14.18 || >=16.20"
+      }
+    },
+    "node_modules/@tinyhttp/proxy-addr": {
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+      "resolved": "https://registry.npmjs.org/lowdb/-/lowdb-7.0.1.tgz",
+      "integrity": "sha512-neJAj8GwF0e8EpycYIDFqEPcx9Qz4GUho20jWFR7YiFeXzF1YMLdxB36PypcTSPMA+4+LvgyMacYhlr18Zlymw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "steno": "^4.0.2"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/typicode"
+      }
+    },
    "node_modules/lower-case": {
      "version": "2.0.2",
      "resolved": "https://registry.npmjs.org/lower-case/-/lower-case-2.0.2.tgz",
@@ -11400,6 +11990,16 @@
        "node": ">=8.6"
      }
    },
+    "node_modules/milliparsec": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/milliparsec/-/milliparsec-4.0.0.tgz",
+      "integrity": "sha512-/wk9d4Z6/9ZvoEH/6BI4TrTCgmkpZPuSRN/6fI9aUHOfXdNTuj/VhLS7d+NqG26bi6L9YmGXutVYvWC8zQ0qtA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=20"
+      }
+    },
    "node_modules/mime": {
      "version": "1.6.0",
      "resolved": "https://registry.npmjs.org/mime/-/mime-1.6.0.tgz",
@@ -11519,6 +12119,16 @@
        "mkdirp": "bin/cmd.js"
      }
    },
+    "node_modules/mrmime": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/mrmime/-/mrmime-2.0.1.tgz",
+      "integrity": "sha512-Y3wQdFg2Va6etvQ5I82yUhGdsKrcYox6p7FfL1LbK2J4V01F9TGlepTIhnK24t7koZibmg82KGglhA1XK5IsLQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=10"
+      }
+    },
    "node_modules/ms": {
      "version": "2.1.3",
      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
@@ -14235,6 +14845,16 @@
        "url": "https://github.com/sponsors/ljharb"
      }
    },
+    "node_modules/regexparam": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/regexparam/-/regexparam-2.0.2.tgz",
+      "integrity": "sha512-A1PeDEYMrkLrfyOwv2jwihXbo9qxdGD3atBYQA9JJgreAx8/7rC6IUkWOw2NQlOxLp2wL0ifQbh1HuidDfYA6w==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
+    },
    "node_modules/regexpu-core": {
      "version": "6.2.0",
      "resolved": "https://registry.npmjs.org/regexpu-core/-/regexpu-core-6.2.0.tgz",
@@ -14556,6 +15176,16 @@
        "queue-microtask": "^1.2.2"
      }
    },
+    "node_modules/rxjs": {
+      "version": "7.8.2",
+      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-7.8.2.tgz",
+      "integrity": "sha512-dhKf903U/PQZY6boNNtAGdWbG85WAbjT/1xYoZIC7FAY0yWapOBQVsVrDl58W86//e1VpMNBtRV4MaXfdMySFA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "tslib": "^2.1.0"
+      }
+    },
    "node_modules/safe-array-concat": {
      "version": "1.1.3",
      "resolved": "https://registry.npmjs.org/safe-array-concat/-/safe-array-concat-1.1.3.tgz",
@@ -15019,9 +15649,9 @@
      }
    },
    "node_modules/shell-quote": {
-      "version": "1.8.2",
-      "resolved": "https://registry.npmjs.org/shell-quote/-/shell-quote-1.8.2.tgz",
-      "integrity": "sha512-AzqKpGKjrj7EM6rKVQEPpB288oCfnrEIuyoT9cyF4nmGa7V8Zk6f7RRqYisX8X9m+Q7bd632aZW4ky7EhbQztA==",
+      "version": "1.8.3",
+      "resolved": "https://registry.npmjs.org/shell-quote/-/shell-quote-1.8.3.tgz",
+      "integrity": "sha512-ObmnIF4hXNg1BqhnHmgbDETF8dLPCggZWBjkQfhZpbszZnYur5DUljTcCHii5LC3J5E0yeO/1LIMyH+UvHQgyw==",
      "license": "MIT",
      "engines": {
        "node": ">= 0.4"
@@ -15108,6 +15738,21 @@
      "integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==",
      "license": "ISC"
    },
+    "node_modules/sirv": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/sirv/-/sirv-2.0.4.tgz",
+      "integrity": "sha512-94Bdh3cC2PKrbgSOUqTiGPWVZeSiXfKOVZNJniWoqrWrRkB1CJzBU3NEbiTsPcYy1lDsANA/THzS+9WBiy5nfQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@polka/url": "^1.0.0-next.24",
+        "mrmime": "^2.0.0",
+        "totalist": "^3.0.0"
+      },
+      "engines": {
+        "node": ">= 10"
+      }
+    },
    "node_modules/sisteransi": {
      "version": "1.0.5",
      "resolved": "https://registry.npmjs.org/sisteransi/-/sisteransi-1.0.5.tgz",
@@ -15134,6 +15779,22 @@
        "websocket-driver": "^0.7.4"
      }
    },
+    "node_modules/sort-on": {
+      "version": "6.1.1",
+      "resolved": "https://registry.npmjs.org/sort-on/-/sort-on-6.1.1.tgz",
+      "integrity": "sha512-PB8pVvXAoRBijBCvuKJnmo06D8mSnQlLij0abfB2VdOpfFm29sPGYD4ft2prUPo1AZXTnkn3pP48AppRWyMkrw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "dot-prop": "^9.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
    "node_modules/source-list-map": {
      "version": "2.0.1",
      "resolved": "https://registry.npmjs.org/source-list-map/-/source-list-map-2.0.1.tgz",
@@ -15384,6 +16045,19 @@
        "node": ">= 0.8"
      }
    },
+    "node_modules/steno": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/steno/-/steno-4.0.2.tgz",
+      "integrity": "sha512-yhPIQXjrlt1xv7dyPQg2P17URmXbuM5pdGkpiMB3RenprfiBlvK415Lctfe0eshk90oA7/tNq7WEiMK8RSP39A==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/typicode"
+      }
+    },
    "node_modules/string_decoder": {
      "version": "1.3.0",
      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
@@ -16215,6 +16889,16 @@
        "node": ">=0.6"
      }
    },
+    "node_modules/totalist": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/totalist/-/totalist-3.0.1.tgz",
+      "integrity": "sha512-sf4i37nQ2LBx4m3wB74y+ubopq6W/dIzXg0FDGjsYnZHVa1Da8FH853wlL2gtUhg+xJXjfk3kUZS3BRoQeoQBQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      }
+    },
    "node_modules/tough-cookie": {
      "version": "4.1.4",
      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-4.1.4.tgz",
@@ -16251,6 +16935,16 @@
        "node": ">=8"
      }
    },
+    "node_modules/tree-kill": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/tree-kill/-/tree-kill-1.2.2.tgz",
+      "integrity": "sha512-L0Orpi8qGpRG//Nd+H90vFB+3iHnue1zSSGmNOOCh1GLJ7rUKVwV2HvijphGQS2UmhUZewS9VgvxYIdgr+fG1A==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "tree-kill": "cli.js"
+      }
+    },
    "node_modules/tryer": {
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/tryer/-/tryer-1.0.1.tgz",
--- a/punkrock-react/package.json
+++ b/punkrock-react/package.json
@@ -22,7 +22,9 @@
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
-    "eject": "react-scripts eject"
+    "eject": "react-scripts eject",
+    "json-server": "json-server --watch db.json --port 3001",
+    "dev": "concurrently \"npm start\" \"npm run json-server\""
  },
  "eslintConfig": {
    "extends": [
@@ -41,5 +43,9 @@
      "last 1 firefox version",
      "last 1 safari version"
    ]
+  },
+  "devDependencies": {
+    "concurrently": "^9.2.1",
+    "json-server": "^1.0.0-beta.3"
  }
 }
--- a/punkrock-react/src/services/api.js
+++ b/punkrock-react/src/services/api.js
@@ -1,4 +1,4 @@
-const API_URL = 'http://localhost:3000';
+const API_URL = 'http://localhost:8080/api';

 export const getArtists = async () => {
  const response = await fetch(`${API_URL}/artists`);