├── .gitignore ├── README.md ├── build.gradle.kts ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── settings.gradle.kts └── src ├── main ├── kotlin │ └── com │ │ └── codersee │ │ └── springcoroutines │ │ ├── SpringCoroutinesApplication.kt │ │ ├── controller │ │ ├── CompanyController.kt │ │ ├── SearchController.kt │ │ └── UserController.kt │ │ ├── dto │ │ ├── CompanyRequest.kt │ │ ├── CompanyResponse.kt │ │ ├── IdNameTypeResponse.kt │ │ ├── UserRequest.kt │ │ └── UserResponse.kt │ │ ├── model │ │ ├── Company.kt │ │ └── User.kt │ │ ├── repository │ │ ├── CompanyRepository.kt │ │ └── UserRepository.kt │ │ └── service │ │ ├── CompanyService.kt │ │ └── UserService.kt └── resources │ └── application.yaml └── test └── kotlin └── com └── codersee └── springcoroutines └── SpringCoroutinesApplicationTests.kt /.gitignore: -------------------------------------------------------------------------------- 1 | HELP.md 2 | .gradle 3 | build/ 4 | !gradle/wrapper/gradle-wrapper.jar 5 | !**/src/main/**/build/ 6 | !**/src/test/**/build/ 7 | 8 | ### STS ### 9 | .apt_generated 10 | .classpath 11 | .factorypath 12 | .project 13 | .settings 14 | .springBeans 15 | .sts4-cache 16 | bin/ 17 | !**/src/main/**/bin/ 18 | !**/src/test/**/bin/ 19 | 20 | ### IntelliJ IDEA ### 21 | .idea 22 | *.iws 23 | *.iml 24 | *.ipr 25 | out/ 26 | !**/src/main/**/out/ 27 | !**/src/test/**/out/ 28 | 29 | ### NetBeans ### 30 | /nbproject/private/ 31 | /nbbuild/ 32 | /dist/ 33 | /nbdist/ 34 | /.nb-gradle/ 35 | 36 | ### VS Code ### 37 | .vscode/ 38 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Reactive REST API With Spring, Kotlin and Coroutines 2 | 3 | This repository contains a source code for the Codersee's article: https://codersee.com/reactive-rest-api-with-spring-kotlin-and-coroutines/ 4 | -------------------------------------------------------------------------------- /build.gradle.kts: -------------------------------------------------------------------------------- 1 | import org.jetbrains.kotlin.gradle.tasks.KotlinCompile 2 | 3 | plugins { 4 | id("org.springframework.boot") version "3.0.3" 5 | id("io.spring.dependency-management") version "1.1.0" 6 | kotlin("jvm") version "1.7.22" 7 | kotlin("plugin.spring") version "1.7.22" 8 | } 9 | 10 | group = "com.codersee" 11 | version = "0.0.1-SNAPSHOT" 12 | java.sourceCompatibility = JavaVersion.VERSION_17 13 | 14 | repositories { 15 | mavenCentral() 16 | } 17 | 18 | dependencies { 19 | implementation("org.springframework.boot:spring-boot-starter-data-r2dbc") 20 | implementation("org.springframework.boot:spring-boot-starter-webflux") 21 | implementation("com.fasterxml.jackson.module:jackson-module-kotlin") 22 | implementation("io.projectreactor.kotlin:reactor-kotlin-extensions") 23 | implementation("org.jetbrains.kotlin:kotlin-reflect") 24 | implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactor") 25 | runtimeOnly("org.postgresql:postgresql") 26 | runtimeOnly("org.postgresql:r2dbc-postgresql") 27 | testImplementation("org.springframework.boot:spring-boot-starter-test") 28 | testImplementation("io.projectreactor:reactor-test") 29 | } 30 | 31 | tasks.withType { 32 | kotlinOptions { 33 | freeCompilerArgs = listOf("-Xjsr305=strict") 34 | jvmTarget = "17" 35 | } 36 | } 37 | 38 | tasks.withType { 39 | useJUnitPlatform() 40 | } 41 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/codersee-blog/spring-boot-3-kotlin-coroutines/9f49ee0f44fae4be6ec3ed1e7dc97181fabe22ba/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.1-bin.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | # 4 | # Copyright © 2015-2021 the original authors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # 10 | # https://www.apache.org/licenses/LICENSE-2.0 11 | # 12 | # Unless required by applicable law or agreed to in writing, software 13 | # distributed under the License is distributed on an "AS IS" BASIS, 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | # See the License for the specific language governing permissions and 16 | # limitations under the License. 17 | # 18 | 19 | ############################################################################## 20 | # 21 | # Gradle start up script for POSIX generated by Gradle. 22 | # 23 | # Important for running: 24 | # 25 | # (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is 26 | # noncompliant, but you have some other compliant shell such as ksh or 27 | # bash, then to run this script, type that shell name before the whole 28 | # command line, like: 29 | # 30 | # ksh Gradle 31 | # 32 | # Busybox and similar reduced shells will NOT work, because this script 33 | # requires all of these POSIX shell features: 34 | # * functions; 35 | # * expansions «$var», «${var}», «${var:-default}», «${var+SET}», 36 | # «${var#prefix}», «${var%suffix}», and «$( cmd )»; 37 | # * compound commands having a testable exit status, especially «case»; 38 | # * various built-in commands including «command», «set», and «ulimit». 39 | # 40 | # Important for patching: 41 | # 42 | # (2) This script targets any POSIX shell, so it avoids extensions provided 43 | # by Bash, Ksh, etc; in particular arrays are avoided. 44 | # 45 | # The "traditional" practice of packing multiple parameters into a 46 | # space-separated string is a well documented source of bugs and security 47 | # problems, so this is (mostly) avoided, by progressively accumulating 48 | # options in "$@", and eventually passing that to Java. 49 | # 50 | # Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS, 51 | # and GRADLE_OPTS) rely on word-splitting, this is performed explicitly; 52 | # see the in-line comments for details. 53 | # 54 | # There are tweaks for specific operating systems such as AIX, CygWin, 55 | # Darwin, MinGW, and NonStop. 56 | # 57 | # (3) This script is generated from the Groovy template 58 | # https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt 59 | # within the Gradle project. 60 | # 61 | # You can find Gradle at https://github.com/gradle/gradle/. 62 | # 63 | ############################################################################## 64 | 65 | # Attempt to set APP_HOME 66 | 67 | # Resolve links: $0 may be a link 68 | app_path=$0 69 | 70 | # Need this for daisy-chained symlinks. 71 | while 72 | APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path 73 | [ -h "$app_path" ] 74 | do 75 | ls=$( ls -ld "$app_path" ) 76 | link=${ls#*' -> '} 77 | case $link in #( 78 | /*) app_path=$link ;; #( 79 | *) app_path=$APP_HOME$link ;; 80 | esac 81 | done 82 | 83 | APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit 84 | 85 | APP_NAME="Gradle" 86 | APP_BASE_NAME=${0##*/} 87 | 88 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 89 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 90 | 91 | # Use the maximum available, or set MAX_FD != -1 to use that value. 92 | MAX_FD=maximum 93 | 94 | warn () { 95 | echo "$*" 96 | } >&2 97 | 98 | die () { 99 | echo 100 | echo "$*" 101 | echo 102 | exit 1 103 | } >&2 104 | 105 | # OS specific support (must be 'true' or 'false'). 106 | cygwin=false 107 | msys=false 108 | darwin=false 109 | nonstop=false 110 | case "$( uname )" in #( 111 | CYGWIN* ) cygwin=true ;; #( 112 | Darwin* ) darwin=true ;; #( 113 | MSYS* | MINGW* ) msys=true ;; #( 114 | NONSTOP* ) nonstop=true ;; 115 | esac 116 | 117 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 118 | 119 | 120 | # Determine the Java command to use to start the JVM. 121 | if [ -n "$JAVA_HOME" ] ; then 122 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 123 | # IBM's JDK on AIX uses strange locations for the executables 124 | JAVACMD=$JAVA_HOME/jre/sh/java 125 | else 126 | JAVACMD=$JAVA_HOME/bin/java 127 | fi 128 | if [ ! -x "$JAVACMD" ] ; then 129 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 130 | 131 | Please set the JAVA_HOME variable in your environment to match the 132 | location of your Java installation." 133 | fi 134 | else 135 | JAVACMD=java 136 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 137 | 138 | Please set the JAVA_HOME variable in your environment to match the 139 | location of your Java installation." 140 | fi 141 | 142 | # Increase the maximum file descriptors if we can. 143 | if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then 144 | case $MAX_FD in #( 145 | max*) 146 | MAX_FD=$( ulimit -H -n ) || 147 | warn "Could not query maximum file descriptor limit" 148 | esac 149 | case $MAX_FD in #( 150 | '' | soft) :;; #( 151 | *) 152 | ulimit -n "$MAX_FD" || 153 | warn "Could not set maximum file descriptor limit to $MAX_FD" 154 | esac 155 | fi 156 | 157 | # Collect all arguments for the java command, stacking in reverse order: 158 | # * args from the command line 159 | # * the main class name 160 | # * -classpath 161 | # * -D...appname settings 162 | # * --module-path (only if needed) 163 | # * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables. 164 | 165 | # For Cygwin or MSYS, switch paths to Windows format before running java 166 | if "$cygwin" || "$msys" ; then 167 | APP_HOME=$( cygpath --path --mixed "$APP_HOME" ) 168 | CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" ) 169 | 170 | JAVACMD=$( cygpath --unix "$JAVACMD" ) 171 | 172 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 173 | for arg do 174 | if 175 | case $arg in #( 176 | -*) false ;; # don't mess with options #( 177 | /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath 178 | [ -e "$t" ] ;; #( 179 | *) false ;; 180 | esac 181 | then 182 | arg=$( cygpath --path --ignore --mixed "$arg" ) 183 | fi 184 | # Roll the args list around exactly as many times as the number of 185 | # args, so each arg winds up back in the position where it started, but 186 | # possibly modified. 187 | # 188 | # NB: a `for` loop captures its iteration list before it begins, so 189 | # changing the positional parameters here affects neither the number of 190 | # iterations, nor the values presented in `arg`. 191 | shift # remove old arg 192 | set -- "$@" "$arg" # push replacement arg 193 | done 194 | fi 195 | 196 | # Collect all arguments for the java command; 197 | # * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of 198 | # shell script including quotes and variable substitutions, so put them in 199 | # double quotes to make sure that they get re-expanded; and 200 | # * put everything else in single quotes, so that it's not re-expanded. 201 | 202 | set -- \ 203 | "-Dorg.gradle.appname=$APP_BASE_NAME" \ 204 | -classpath "$CLASSPATH" \ 205 | org.gradle.wrapper.GradleWrapperMain \ 206 | "$@" 207 | 208 | # Stop when "xargs" is not available. 209 | if ! command -v xargs >/dev/null 2>&1 210 | then 211 | die "xargs is not available" 212 | fi 213 | 214 | # Use "xargs" to parse quoted args. 215 | # 216 | # With -n1 it outputs one arg per line, with the quotes and backslashes removed. 217 | # 218 | # In Bash we could simply go: 219 | # 220 | # readarray ARGS < <( xargs -n1 <<<"$var" ) && 221 | # set -- "${ARGS[@]}" "$@" 222 | # 223 | # but POSIX shell has neither arrays nor command substitution, so instead we 224 | # post-process each arg (as a line of input to sed) to backslash-escape any 225 | # character that might be a shell metacharacter, then use eval to reverse 226 | # that process (while maintaining the separation between arguments), and wrap 227 | # the whole thing up as a single "set" statement. 228 | # 229 | # This will of course break if any of these variables contains a newline or 230 | # an unmatched quote. 231 | # 232 | 233 | eval "set -- $( 234 | printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" | 235 | xargs -n1 | 236 | sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' | 237 | tr '\n' ' ' 238 | )" '"$@"' 239 | 240 | exec "$JAVACMD" "$@" 241 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%"=="" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%"=="" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter. 33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi 34 | 35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 37 | 38 | @rem Find java.exe 39 | if defined JAVA_HOME goto findJavaFromJavaHome 40 | 41 | set JAVA_EXE=java.exe 42 | %JAVA_EXE% -version >NUL 2>&1 43 | if %ERRORLEVEL% equ 0 goto execute 44 | 45 | echo. 46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 47 | echo. 48 | echo Please set the JAVA_HOME variable in your environment to match the 49 | echo location of your Java installation. 50 | 51 | goto fail 52 | 53 | :findJavaFromJavaHome 54 | set JAVA_HOME=%JAVA_HOME:"=% 55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 56 | 57 | if exist "%JAVA_EXE%" goto execute 58 | 59 | echo. 60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 61 | echo. 62 | echo Please set the JAVA_HOME variable in your environment to match the 63 | echo location of your Java installation. 64 | 65 | goto fail 66 | 67 | :execute 68 | @rem Setup the command line 69 | 70 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 71 | 72 | 73 | @rem Execute Gradle 74 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* 75 | 76 | :end 77 | @rem End local scope for the variables with windows NT shell 78 | if %ERRORLEVEL% equ 0 goto mainEnd 79 | 80 | :fail 81 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 82 | rem the _cmd.exe /c_ return code! 83 | set EXIT_CODE=%ERRORLEVEL% 84 | if %EXIT_CODE% equ 0 set EXIT_CODE=1 85 | if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE% 86 | exit /b %EXIT_CODE% 87 | 88 | :mainEnd 89 | if "%OS%"=="Windows_NT" endlocal 90 | 91 | :omega 92 | -------------------------------------------------------------------------------- /settings.gradle.kts: -------------------------------------------------------------------------------- 1 | rootProject.name = "spring-coroutines" 2 | -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/SpringCoroutinesApplication.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines 2 | 3 | import org.springframework.boot.autoconfigure.SpringBootApplication 4 | import org.springframework.boot.runApplication 5 | 6 | @SpringBootApplication 7 | class SpringCoroutinesApplication 8 | 9 | fun main(args: Array) { 10 | runApplication(*args) 11 | } 12 | -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/controller/CompanyController.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.controller 2 | 3 | import com.codersee.springcoroutines.dto.CompanyRequest 4 | import com.codersee.springcoroutines.dto.CompanyResponse 5 | import com.codersee.springcoroutines.model.Company 6 | import com.codersee.springcoroutines.model.User 7 | import com.codersee.springcoroutines.service.CompanyService 8 | import com.codersee.springcoroutines.service.UserService 9 | import kotlinx.coroutines.flow.Flow 10 | import kotlinx.coroutines.flow.map 11 | import kotlinx.coroutines.flow.toList 12 | import org.springframework.http.HttpStatus 13 | import org.springframework.web.bind.annotation.* 14 | import org.springframework.web.server.ResponseStatusException 15 | 16 | @RestController 17 | @RequestMapping("/api/companies") 18 | class CompanyController( 19 | private val companyService: CompanyService, 20 | private val userService: UserService 21 | ) { 22 | 23 | @PostMapping 24 | suspend fun createCompany(@RequestBody companyRequest: CompanyRequest): CompanyResponse = 25 | companyService.saveCompany( 26 | company = companyRequest.toModel() 27 | ) 28 | ?.toResponse() 29 | ?: throw ResponseStatusException( 30 | HttpStatus.INTERNAL_SERVER_ERROR, "Unexpected error during company creation." 31 | ) 32 | 33 | @GetMapping 34 | suspend fun findCompany( 35 | @RequestParam("name", required = false) name: String? 36 | ): Flow { 37 | val companies = name?.let { companyService.findAllCompaniesByNameLike(name) } 38 | ?: companyService.findAllCompanies() 39 | 40 | return companies 41 | .map { company -> 42 | company.toResponse( 43 | users = findCompanyUsers(company) 44 | ) 45 | } 46 | } 47 | 48 | 49 | @GetMapping("/{id}") 50 | suspend fun findCompanyById( 51 | @PathVariable id: Long 52 | ): CompanyResponse = 53 | companyService.findCompanyById(id) 54 | ?.let { company -> 55 | company.toResponse( 56 | users = findCompanyUsers(company) 57 | ) 58 | } 59 | ?: throw ResponseStatusException(HttpStatus.NOT_FOUND, "Company with id $id was not found.") 60 | 61 | @DeleteMapping("/{id}") 62 | suspend fun deleteCompanyById( 63 | @PathVariable id: Long 64 | ) { 65 | companyService.deleteCompanyById(id) 66 | } 67 | 68 | @PutMapping("/{id}") 69 | suspend fun updateCompany( 70 | @PathVariable id: Long, 71 | @RequestBody companyRequest: CompanyRequest 72 | ): CompanyResponse = 73 | companyService.updateCompany( 74 | id = id, 75 | requestedCompany = companyRequest.toModel() 76 | ) 77 | .let { company -> 78 | company.toResponse( 79 | users = findCompanyUsers(company) 80 | ) 81 | } 82 | 83 | private suspend fun findCompanyUsers(company: Company) = 84 | userService.findUsersByCompanyId(company.id!!) 85 | .toList() 86 | } 87 | 88 | 89 | private fun CompanyRequest.toModel(): Company = 90 | Company( 91 | name = this.name, 92 | address = this.address 93 | ) 94 | 95 | private fun Company.toResponse(users: List = emptyList()): CompanyResponse = 96 | CompanyResponse( 97 | id = this.id!!, 98 | name = this.name, 99 | address = this.address, 100 | users = users.map(User::toResponse) 101 | ) 102 | 103 | -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/controller/SearchController.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.controller 2 | 3 | import com.codersee.springcoroutines.dto.IdNameTypeResponse 4 | import com.codersee.springcoroutines.dto.ResultType 5 | import com.codersee.springcoroutines.model.Company 6 | import com.codersee.springcoroutines.model.User 7 | import com.codersee.springcoroutines.service.CompanyService 8 | import com.codersee.springcoroutines.service.UserService 9 | import kotlinx.coroutines.flow.Flow 10 | import kotlinx.coroutines.flow.map 11 | import kotlinx.coroutines.flow.merge 12 | import org.springframework.web.bind.annotation.GetMapping 13 | import org.springframework.web.bind.annotation.RequestMapping 14 | import org.springframework.web.bind.annotation.RequestParam 15 | import org.springframework.web.bind.annotation.RestController 16 | 17 | @RestController 18 | @RequestMapping("/api/search") 19 | class SearchController( 20 | private val userService: UserService, 21 | private val companyService: CompanyService 22 | ) { 23 | 24 | @GetMapping 25 | suspend fun searchByNames( 26 | @RequestParam(name = "query") query: String 27 | ): Flow { 28 | val usersFlow = userService.findAllUsersByNameLike(name = query) 29 | .map(User::toIdNameTypeResponse) 30 | val companiesFlow = companyService.findAllCompaniesByNameLike(name = query) 31 | .map(Company::toIdNameTypeResponse) 32 | 33 | return merge(usersFlow, companiesFlow) 34 | } 35 | } 36 | 37 | private fun User.toIdNameTypeResponse(): IdNameTypeResponse = 38 | IdNameTypeResponse( 39 | id = this.id!!, 40 | name = this.name, 41 | type = ResultType.USER 42 | ) 43 | 44 | private fun Company.toIdNameTypeResponse(): IdNameTypeResponse = 45 | IdNameTypeResponse( 46 | id = this.id!!, 47 | name = this.name, 48 | type = ResultType.COMPANY 49 | ) -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/controller/UserController.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.controller 2 | 3 | import com.codersee.springcoroutines.dto.UserRequest 4 | import com.codersee.springcoroutines.dto.UserResponse 5 | import com.codersee.springcoroutines.model.User 6 | import com.codersee.springcoroutines.service.UserService 7 | import kotlinx.coroutines.flow.Flow 8 | import kotlinx.coroutines.flow.map 9 | import org.springframework.http.HttpStatus 10 | import org.springframework.web.bind.annotation.* 11 | import org.springframework.web.server.ResponseStatusException 12 | 13 | @RestController 14 | @RequestMapping("/api/users") 15 | class UserController( 16 | private val userService: UserService 17 | ) { 18 | 19 | @PostMapping 20 | suspend fun createUser(@RequestBody userRequest: UserRequest): UserResponse = 21 | userService.saveUser( 22 | user = userRequest.toModel() 23 | ) 24 | ?.toResponse() 25 | ?: throw ResponseStatusException(HttpStatus.INTERNAL_SERVER_ERROR, "Unexpected error during user creation.") 26 | 27 | @GetMapping 28 | suspend fun findUsers( 29 | @RequestParam("name", required = false) name: String? 30 | ): Flow { 31 | val users = name?.let { userService.findAllUsersByNameLike(name) } 32 | ?: userService.findAllUsers() 33 | 34 | return users.map(User::toResponse) 35 | } 36 | 37 | @GetMapping("/{id}") 38 | suspend fun findUserById( 39 | @PathVariable id: Long 40 | ): UserResponse = 41 | userService.findUserById(id) 42 | ?.let(User::toResponse) 43 | ?: throw ResponseStatusException(HttpStatus.NOT_FOUND, "User with id $id was not found.") 44 | 45 | @DeleteMapping("/{id}") 46 | suspend fun deleteUserById( 47 | @PathVariable id: Long 48 | ) { 49 | userService.deleteUserById(id) 50 | } 51 | 52 | @PutMapping("/{id}") 53 | suspend fun updateUser( 54 | @PathVariable id: Long, 55 | @RequestBody userRequest: UserRequest 56 | ): UserResponse = 57 | userService.updateUser( 58 | id = id, 59 | requestedUser = userRequest.toModel() 60 | ) 61 | .toResponse() 62 | } 63 | 64 | private fun UserRequest.toModel(): User = 65 | User( 66 | email = this.email, 67 | name = this.name, 68 | age = this.age, 69 | companyId = this.companyId 70 | ) 71 | 72 | fun User.toResponse(): UserResponse = 73 | UserResponse( 74 | id = this.id!!, 75 | email = this.email, 76 | name = this.name, 77 | age = this.age 78 | ) 79 | 80 | -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/dto/CompanyRequest.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.dto 2 | 3 | data class CompanyRequest( 4 | val name: String, 5 | val address: String 6 | ) 7 | -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/dto/CompanyResponse.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.dto 2 | 3 | data class CompanyResponse( 4 | val id: Long, 5 | val name: String, 6 | val address: String, 7 | val users: List 8 | ) 9 | -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/dto/IdNameTypeResponse.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.dto 2 | 3 | data class IdNameTypeResponse( 4 | val id: Long, 5 | val name: String, 6 | val type: ResultType 7 | ) 8 | 9 | enum class ResultType { 10 | USER, COMPANY 11 | } -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/dto/UserRequest.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.dto 2 | 3 | import com.fasterxml.jackson.annotation.JsonProperty 4 | 5 | data class UserRequest( 6 | val email: String, 7 | val name: String, 8 | val age: Int, 9 | @JsonProperty("company_id") val companyId: Long 10 | ) 11 | -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/dto/UserResponse.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.dto 2 | 3 | data class UserResponse( 4 | val id: Long, 5 | val email: String, 6 | val name: String, 7 | val age: Int 8 | ) 9 | -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/model/Company.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.model 2 | 3 | import org.springframework.data.annotation.Id 4 | import org.springframework.data.relational.core.mapping.Table 5 | 6 | @Table("application.company") 7 | data class Company( 8 | @Id val id: Long? = null, 9 | val name: String, 10 | val address: String 11 | ) -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/model/User.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.model 2 | 3 | import org.springframework.data.annotation.Id 4 | import org.springframework.data.relational.core.mapping.Table 5 | 6 | @Table("application.app_user") 7 | data class User( 8 | @Id val id: Long? = null, 9 | val email: String, 10 | val name: String, 11 | val age: Int, 12 | val companyId: Long 13 | ) -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/repository/CompanyRepository.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.repository 2 | 3 | import com.codersee.springcoroutines.model.Company 4 | import kotlinx.coroutines.flow.Flow 5 | import org.springframework.data.repository.kotlin.CoroutineCrudRepository 6 | 7 | interface CompanyRepository : CoroutineCrudRepository { 8 | fun findByNameContaining(name: String): Flow 9 | } -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/repository/UserRepository.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.repository 2 | 3 | import com.codersee.springcoroutines.model.User 4 | import kotlinx.coroutines.flow.Flow 5 | import org.springframework.data.r2dbc.repository.Query 6 | import org.springframework.data.repository.kotlin.CoroutineCrudRepository 7 | 8 | interface UserRepository : CoroutineCrudRepository { 9 | 10 | fun findByNameContaining(name: String): Flow 11 | 12 | fun findByCompanyId(companyId: Long): Flow 13 | 14 | @Query("SELECT * FROM application.app_user WHERE email = :email") 15 | fun randomNameFindByEmail(email: String): Flow 16 | } -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/service/CompanyService.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.service 2 | 3 | import com.codersee.springcoroutines.model.Company 4 | import com.codersee.springcoroutines.repository.CompanyRepository 5 | import kotlinx.coroutines.flow.Flow 6 | import org.springframework.http.HttpStatus 7 | import org.springframework.stereotype.Service 8 | import org.springframework.web.server.ResponseStatusException 9 | 10 | @Service 11 | class CompanyService( 12 | private val companyRepository: CompanyRepository 13 | ) { 14 | 15 | suspend fun saveCompany(company: Company): Company? = 16 | companyRepository.save(company) 17 | 18 | suspend fun findAllCompanies(): Flow = 19 | companyRepository.findAll() 20 | 21 | suspend fun findCompanyById(id: Long): Company? = 22 | companyRepository.findById(id) 23 | 24 | suspend fun deleteCompanyById(id: Long) { 25 | val foundCompany = companyRepository.findById(id) 26 | 27 | if (foundCompany == null) 28 | throw ResponseStatusException(HttpStatus.NOT_FOUND, "Company with id $id was not found.") 29 | else 30 | companyRepository.deleteById(id) 31 | } 32 | 33 | suspend fun findAllCompaniesByNameLike(name: String): Flow = 34 | companyRepository.findByNameContaining(name) 35 | 36 | suspend fun updateCompany(id: Long, requestedCompany: Company): Company { 37 | val foundCompany = companyRepository.findById(id) 38 | 39 | return if (foundCompany == null) 40 | throw ResponseStatusException(HttpStatus.NOT_FOUND, "Company with id $id was not found.") 41 | else 42 | companyRepository.save( 43 | foundCompany.copy(id = foundCompany.id) 44 | ) 45 | } 46 | 47 | } -------------------------------------------------------------------------------- /src/main/kotlin/com/codersee/springcoroutines/service/UserService.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines.service 2 | 3 | import com.codersee.springcoroutines.model.User 4 | import com.codersee.springcoroutines.repository.UserRepository 5 | import kotlinx.coroutines.flow.Flow 6 | import kotlinx.coroutines.flow.firstOrNull 7 | import org.springframework.http.HttpStatus 8 | import org.springframework.stereotype.Service 9 | import org.springframework.web.server.ResponseStatusException 10 | 11 | @Service 12 | class UserService( 13 | private val userRepository: UserRepository 14 | ) { 15 | 16 | suspend fun saveUser(user: User): User? = 17 | userRepository.randomNameFindByEmail(user.email) 18 | .firstOrNull() 19 | ?.let { throw ResponseStatusException(HttpStatus.BAD_REQUEST, "The specified email is already in use.") } 20 | ?: userRepository.save(user) 21 | 22 | suspend fun findAllUsers(): Flow = 23 | userRepository.findAll() 24 | 25 | suspend fun findUserById(id: Long): User? = 26 | userRepository.findById(id) 27 | 28 | suspend fun deleteUserById(id: Long) { 29 | val foundUser = userRepository.findById(id) 30 | 31 | if (foundUser == null) 32 | throw ResponseStatusException(HttpStatus.NOT_FOUND, "User with id $id was not found.") 33 | else 34 | userRepository.deleteById(id) 35 | } 36 | 37 | suspend fun updateUser(id: Long, requestedUser: User): User { 38 | val foundUser = userRepository.findById(id) 39 | 40 | return if (foundUser == null) 41 | throw ResponseStatusException(HttpStatus.NOT_FOUND, "User with id $id was not found.") 42 | else 43 | userRepository.save( 44 | requestedUser.copy(id = foundUser.id) 45 | ) 46 | } 47 | 48 | suspend fun findAllUsersByNameLike(name: String): Flow = 49 | userRepository.findByNameContaining(name) 50 | 51 | suspend fun findUsersByCompanyId(id: Long): Flow = 52 | userRepository.findByCompanyId(id) 53 | } -------------------------------------------------------------------------------- /src/main/resources/application.yaml: -------------------------------------------------------------------------------- 1 | spring: 2 | r2dbc: 3 | url: r2dbc:postgresql://${DB_HOST:localhost}:5432/ 4 | username: ${DB_USERNAME:postgres} 5 | password: ${DB_PASSWORD:postgres} -------------------------------------------------------------------------------- /src/test/kotlin/com/codersee/springcoroutines/SpringCoroutinesApplicationTests.kt: -------------------------------------------------------------------------------- 1 | package com.codersee.springcoroutines 2 | 3 | import org.junit.jupiter.api.Test 4 | import org.springframework.boot.test.context.SpringBootTest 5 | 6 | @SpringBootTest 7 | class SpringCoroutinesApplicationTests { 8 | 9 | @Test 10 | fun contextLoads() { 11 | } 12 | 13 | } 14 | --------------------------------------------------------------------------------