Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Kopring으로 효율적인 백엔드 구성하기
Search
byeongsu
May 13, 2023
Programming
0
190
Kopring으로 효율적인 백엔드 구성하기
KotlinConf 2023 Global in Songdo에서 Java+Spring에서 Kotiln 으로 언어 변경 시 얻을 수 있는 이점을 소개한 자료입니다.
byeongsu
May 13, 2023
Tweet
Share
Other Decks in Programming
See All in Programming
エンターテイメント業界で利用されるAWS
demuyan
0
210
Netty Chicago Java User Group 2024-04-17
sullis
0
180
Code Reviews
bkuhlmann
4
890
Site Reliability Engineering for GMO
pyama86
8
1k
Blue/Greenデプロイの導入による 運用フローの改善
kudoas
1
380
PostmanでAPIの動作確認が楽になった話
h455h1
0
170
Behind VS Code Extensions for JavaScript / TypeScript Linnting and Formatting
unvalley
5
920
二郎系ラーメンのコールで学ぶ AST 解析
memory1994
PRO
7
1.7k
MetricKitで予期せぬ終了を検知する話 / Detect unexpected termination with MetricKit
nekowen
1
190
コーンフレークから始める モデリング会話入門
ogurotakayuki
0
370
Amazon SQSコンシューマー疎結合への旅 - 出張! #DevelopersIO IT技術ブログの中の人が語る勉強会 #3
quiver
0
270
VSCodeでのDatabricks開発もお勧めしたい/I would also recommend Databricks development with VSCode.
kazumain
0
260
Featured
See All Featured
Infographics Made Easy
chrislema
238
18k
Unsuck your backbone
ammeep
663
57k
Clear Off the Table
cherdarchuk
84
310k
The Illustrated Children's Guide to Kubernetes
chrisshort
31
46k
Docker and Python
trallard
34
2.7k
ParisWeb 2013: Learning to Love: Crash Course in Emotional UX Design
dotmariusz
104
6.6k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
19
1.7k
4 Signs Your Business is Dying
shpigford
175
21k
Building Adaptive Systems
keathley
31
1.9k
Raft: Consensus for Rubyists
vanstee
132
6.3k
The Power of CSS Pseudo Elements
geoffreycrofte
60
5k
How to train your dragon (web standard)
notwaldorf
73
5.2k
Transcript
김병수 KotlinConf’23 Global in Songdo GDG Songdo X Incheon Kopring으로
효율적인 백엔드 구성하기
Autocrypt - Backend Engineer - Data Engineer - Kotlin +
Spring - 정의에 대한 고민 - 코드의 아름다움
Java + Spring Boot => Kotlin + Spring Boot 코드
개선 여정
서비스 요구사항 - 기사의 주행 데이터 수집 - 1초당 위치
정보 수집 - 1분당 주소 정보 저장 - 주소 정보 조회 시 1sec 소요 - 일반적으로 주행은 약 20분 소요
Java + Spring Code
Kotlin으로 언어를 변경한다면 어떤 장점이 있을까요?
1. 가독성 향상 2. 유용한 Extension function 3. 간단한 비동기
처리
다크모드 전환
Entity 설계
@Entity @NoArgsConstructor @AllArgsConstructor @Getter @Setter public class Driver { @Id
@Column private String id; @Column private String name; @Column private String mobileNumber; @Column private LocalDateTime createDate; } Entity 설계
@Entity class Driver ( @Id @Column val id: String =
StringUtil.uuid(), @Column var name: String = "", @Column var mobileNumber: String? = null, @Column val createDate: LocalDateTime = LocalDateTime.now(), ) @Entity @NoArgsConstructor @AllArgsConstructor @Getter @Setter public class Driver { @Id @Column private String id; @Column private String name; @Column private String mobileNumber; @Column private LocalDateTime createDate; } Entity 설계 Java Kotlin
@Entity class Driver ( @Id @Column val id: String =
StringUtil.uuid(), @Column var name: String = "", @Column var mobileNumber: String? = null, @Column val createDate: LocalDateTime = LocalDateTime.now(), ) @Entity @NoArgsConstructor @AllArgsConstructor @Getter @Setter public class Driver { @Id @Column private String id; @Column private String name; @Column private String mobileNumber; @Column private LocalDateTime createDate; } Entity 설계 Java Kotlin
Entity 설계 @Entity class Driver ( @Id @Column val id:
String = StringUtil.uuid(), @Column var name: String = "", @Column var mobileNumber: String? = null, @Column val createDate: LocalDateTime = LocalDateTime.now(), ) @Entity @NoArgsConstructor @AllArgsConstructor @Getter @Setter public class Driver { @Id @Column private String id; @Column private String name; @Column private String mobileNumber; @Column private LocalDateTime createDate; } Java Kotlin
@Entity class Driver ( @Id @Column val id: String =
StringUtil.uuid(), @Column var name: String = "", @Column var mobileNumber: String? = null, @Column val createDate: LocalDateTime = LocalDateTime.now(), ) @Entity @NoArgsConstructor @AllArgsConstructor @Getter @Setter public class Driver { @Id @Column private String id; @Column private String name; @Column private String mobileNumber; @Column private LocalDateTime createDate; } Entity 설계 Java Kotlin
val driver = Driver( id = StringUtil.uuid(), name = "",
mobileNumber = null, createDate = LocalDateTime.now() ) Driver driver = new Driver( StringUtil.uuid(), "", null, LocalDateTime.now() ); Java Kotlin Entity 설계
val driver = Driver( id = StringUtil.uuid(), name = "",
mobileNumber = null, createDate = LocalDateTime.now() ) Driver driver = new Driver( StringUtil.uuid(), "", null, LocalDateTime.now() ); Java Kotlin Entity 설계
Entity 설계 class Driving ( val id: String = StringUtil.uuid(),
var startTime: LocalDateTime = LocalDateTime.now(), var endTime: LocalDateTime? = null, var driver: Driver? = null, var vehicle: Vehicle? = null, var departureAddress: String = "", var destinationAddress: String? = null, // ... // ... var customerName: String = "", var customerMobileNumber: String? = null, var customerEmailAddress: String? = null, var drivingDistance: Double? = null, val createDate: LocalDateTime = LocalDateTime.now(), var updateDate: LocalDateTime = LocalDateTime.now(), )
val driving = Driving( startTime = startTime, endTime = endTime,
customerName = customerName, departureAddress = departureAddress, destinationAddress = destinationAddress, ) Driving driving = new Driving( StringUtil.uuid(), startTime, endTime, null, null, departureAddress, destinationAddress, // ... customerName, null, null, null, LocalDateTime.now(), LocalDateTime.now() ) Java Kotlin Entity 설계
val driving = Driving( startTime = startTime, endTime = endTime,
customerName = customerName, departureAddress = departureAddress, destinationAddress = destinationAddress, ) Driving driving = new Driving( StringUtil.uuid(), startTime, endTime, null, null, departureAddress, destinationAddress, // ... customerName, null, null, null, LocalDateTime.now(), LocalDateTime.now() ) Java Kotlin Entity 설계 ???
val driving = Driving( startTime = startTime, endTime = endTime,
customerName = customerName, departureAddress = departureAddress, destinationAddress = destinationAddress, ) Driving driving = new Driving( StringUtil.uuid(), startTime, endTime, null, null, departureAddress, destinationAddress, // ... customerName, null, null, null, LocalDateTime.now(), LocalDateTime.now() ) Java Kotlin Entity 설계
1. Getter & Setter 제거 a. 주의: Lombok 사용 불가
2. Named Parameter 3. Default Constructor Entity 설계 => 가독성 향상
참고 Kotlin 전환 시 Lombok 에 대하여
dependencies { implementation("org.springframework.boot:spring-boot-starter-web") implementation("com.fasterxml.jackson.module:jackson-module-kotlin") implementation("org.springframework.boot:spring-boot-starter-data-jdbc") implementation("org.springframework.boot:spring-boot-starter-data-jpa") implementation("org.jetbrains.kotlin:kotlin-reflect") // mariadb implementation
("org.mariadb.jdbc:mariadb-java-client") // encoding decoding codec implementation ("commons-codec:commons-codec:1.15") // coroutine implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactor") testImplementation("org.springframework.boot:spring-boot-starter-test") } 적용한 dependencies
dependencies { implementation("org.springframework.boot:spring-boot-starter-web") implementation("com.fasterxml.jackson.module:jackson-module-kotlin") implementation("org.springframework.boot:spring-boot-starter-data-jdbc") implementation("org.springframework.boot:spring-boot-starter-data-jpa") implementation("org.jetbrains.kotlin:kotlin-reflect") // mariadb implementation
("org.mariadb.jdbc:mariadb-java-client") // encoding decoding codec implementation ("commons-codec:commons-codec:1.15") // coroutine implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactor") testImplementation("org.springframework.boot:spring-boot-starter-test") } 적용한 dependencies No Lombok!
주의할 점 Kotlin Java … Annotation Processing … .class .class
1 2 No Code, Lombok Processed
주의할 점
Business Logic 구현
Driving - foo - drivingPath - bar Location - drivingId
- ord - lat - lng - address? Business Logic 구현
fun doneDriving( drivingId: String ): DoneDrivingRes { val driving =
drivingRepository .findFirstById( drivingId ) ?: return DoneDrivingRes(null) val path = locationService .getLocationListByDrivingId( drivingId = driving.id ) driving.setDrivingDistance(path) /* other business logic */ /* other business logic */ drivingRepository.save(driving) locationService.updateAddress(path) return DoneDrivingRes( buildDrivingDto(driving) ) } Business Logic 구현
fun doneDriving( drivingId: String ): DoneDrivingRes { val driving =
drivingRepository .findFirstById( drivingId ) ?: return DoneDrivingRes(null) val path = locationService .getLocationListByDrivingId( drivingId = driving.id ) driving.setDrivingDistance(path) /* other business logic */ /* other business logic */ drivingRepository.save(driving) locationService.updateAddress(path) return DoneDrivingRes( buildDrivingDto(driving) ) } Business Logic 구현
Location - drivingId - ord - lat - lng -
address? Business Logic 구현 drivingId ord lat lng address testId 0 37.387540 126.638847 null testId 1 37.386466 126.639485 null … … … … … testId 59 37.392561 126.635330 null testId 60 37.393679 126.634572 null testId 61 37.395486 126.633526 null … … … … …
Location - drivingId - ord - lat - lng -
address? Business Logic 구현 drivingId ord lat lng address testId 0 37.387540 126.638847 null testId 1 37.386466 126.639485 null … … … … … testId 59 37.392561 126.635330 null testId 60 37.393679 126.634572 null testId 61 37.395486 126.633526 null … … … … …
Location - drivingId - ord - lat - lng -
address? Business Logic 구현 drivingId ord lat lng address testId 0 37.387540 126.638847 인천 연수구 … testId 1 37.386466 126.639485 null … … … … … testId 59 37.392561 126.635330 null testId 60 37.393679 126.634572 인천 연수구 … testId 61 37.395486 126.633526 null … … … … …
private void updateAddress( List<Location> path ) throws InterruptedException { for(int
i=0; i<path.size(); i+=60) { Location location = path.get(i); location.setAddress( findAddress( location.getLat(), location.getLng() ) ); } } Business Logic 구현
private void updateAddress( List<Location> path ) throws InterruptedException { for(int
i=0; i<path.size(); i+=60) { Location location = path.get(i); location.setAddress( findAddress( location.getLat(), location.getLng() ) ); } } Business Logic 구현
private String findAddress( Double lat, Double lng ) throws InterruptedException
{ Thread.sleep(1000); return "address"; } Business Logic 구현
private void updateAddress( List<Location> path ) throws InterruptedException { for(int
i=0; i<path.size(); i+=60) { Location location = path.get(i); location.setAddress( findAddress( location.getLat(), location.getLng() ) ); } } Business Logic 구현
fun updateAddress( path: List<Location> ) { path .chunked(60) .map {
chunk -> val location = chunk .first() location.address = findAddress( lat = location.lat, lng = location.lng, ) location } // 후략 Java Kotlin private void updateAddress( List<Location> path ) throws InterruptedException { for(int i=0; i<path.size(); i+=60) { Location location = path.get(i); location.setAddress( findAddress( location.getLat(), location.getLng() ) ); } } Business Logic 구현
fun updateAddress( path: List<Location> ) { path .chunked(60) .map {
chunk -> val location = chunk .first() location.address = findAddress( lat = location.lat, lng = location.lng, ) location } // 후략 Java Kotlin private void updateAddress( List<Location> path ) throws InterruptedException { for(int i=0; i<path.size(); i+=60) { Location location = path.get(i); location.setAddress( findAddress( location.getLat(), location.getLng() ) ); } } Business Logic 구현
fun updateAddress( path: List<Location> ) { path .chunked(60) .map {
chunk -> val location = chunk .first() location.address = findAddress( lat = location.lat, lng = location.lng, ) location } // 후략 Java Kotlin private void updateAddress( List<Location> path ) throws InterruptedException { for(int i=0; i<path.size(); i+=60) { Location location = path.get(i); location.setAddress( findAddress( location.getLat(), location.getLng() ) ); } } 다시, 주행 종료 API로 돌아가봅시다 Business Logic 구현
fun doneDriving( drivingId: String ): DoneDrivingRes { val driving =
drivingRepository .findFirstById( drivingId ) ?: return DoneDrivingRes(null) val path = locationService .getLocationListByDrivingId( drivingId = driving.id ) driving.setDrivingDistance(path) /* other business logic */ /* other business logic */ drivingRepository.save(driving) locationService.updateAddress(path) return DoneDrivingRes( buildDrivingDto(driving) ) } Business Logic 구현
fun doneDriving( drivingId: String ): DoneDrivingRes { val driving =
drivingRepository .findFirstById( drivingId ) ?: return DoneDrivingRes(null) val path = locationService .getLocationListByDrivingId( drivingId = driving.id ) driving.setDrivingDistance(path) /* other business logic */ /* other business logic */ drivingRepository.save(driving) locationService.updateAddress(path) return DoneDrivingRes( buildDrivingDto(driving) ) } Business Logic 구현
Location - drivingId - ord - lat - lng -
address? Business Logic 구현 drivingId ord lat lng address testId 0 37.387540 126.638847 null testId 1 37.386466 126.639485 null … … … … … testId 59 37.392561 126.635330 null testId 60 37.393679 126.634572 null testId 61 37.395486 126.633526 null … … … … …
Business Logic 구현 drivingId ord lat lng address testId 0
37.387540 126.638847 null testId 1 37.386466 126.639485 null … … … … … testId 59 37.392561 126.635330 null testId 60 37.393679 126.634572 null testId 61 37.395486 126.633526 null … … … … … +Distance +Distance +Distance Driving Distance
driving .setDrivingDistance( getDistanceOfPath( path ) ); driving.setDrivingDistance(path) // 후략 }
fun Driving.setDrivingDistance( path: List<Location> ) { this.drivingDistance = locationService .getDistanceOfPath(path) } Java Kotlin Business Logic 구현
driving.setDrivingDistance(path) // 후략 } fun Driving.setDrivingDistance( path: List<Location> ) {
this.drivingDistance = locationService .getDistanceOfPath(path) } driving .setDrivingDistance( getDistanceOfPath( path ) ); Java Kotlin Business Logic 구현
driving .setDrivingDistance( getDistanceOfPath( path ) ); Java Kotlin driving.setDrivingDistance(path) //
후략 } fun Driving.setDrivingDistance( path: List<Location> ) { this.drivingDistance = locationService .getDistanceOfPath(path) } Business Logic 구현
public Double getDistanceOfPath( List<Location> path ) { double distance =
0.0; for(int i = 1; i < path.size(); i++) { distance += GeoUtil .calculateDistance( path.get(i-1), path.get(i) ); } return distance; } fun getDistanceOfPath( locationList: List<Location> ): Double = locationList .calculateDistanceOfPath() Java Kotlin Business Logic 구현
public Double getDistanceOfPath( List<Location> path ) { double distance =
0.0; for(int i = 1; i < path.size(); i++) { distance += GeoUtil .calculateDistance( path.get(i-1), path.get(i) ); } return distance; } Java Kotlin fun getDistanceOfPath( locationList: List<Location> ): Double = locationList .calculateDistanceOfPath() Business Logic 구현
fun List<Location> .calculateDistanceOfPath(): Double = List(this.size) { index -> if(index
< 1) return 0.0 GeoUtil.calculateDistance( this[index - 1], this[index] ) } .sum() fun getDistanceOfPath( locationList: List<Location> ): Double = locationList .calculateDistanceOfPath() Business Logic 구현
• forEach / map / let • custom Extensions =>
유용한 Extension Functions Business Logic 구현
성능 개선
fun updateAddress( path: List<Location> ) { path .chunked(60) .map {
chunk -> val location = chunk .first() location.address = findAddress( lat = location.lat, lng = location.lng, ) location } // 후략 Java Kotlin private void updateAddress( List<Location> path ) throws InterruptedException { for(int i=0; i<path.size(); i+=60) { Location location = path.get(i); location.setAddress( findAddress( location.getLat(), location.getLng() ) ); } } updateAddress 기능을 살펴봅시다 성능 개선
fun updateAddress( path: List<Location> ) { path .chunked(60) .map {
chunk -> val location = chunk .first() location.address = findAddress( lat = location.lat, lng = location.lng, ) location } // 후략 Java Kotlin private void updateAddress( List<Location> path ) throws InterruptedException { for(int i=0; i<path.size(); i+=60) { Location location = path.get(i); location.setAddress( findAddress( location.getLat(), location.getLng() ) ); } } 성능 개선
fun updateAddress( path: List<Location> ) { path .chunked(6) .map {
chunk -> val location = chunk .first() location.address = findAddress( lat = location.lat, lng = location.lng, ) location } // 후략 Java Kotlin private void updateAddress( List<Location> path ) throws InterruptedException { for(int i=0; i<path.size(); i+=6) { Location location = path.get(i); location.setAddress( findAddress( location.getLat(), location.getLng() ) ); } } 약 20분 주행, 1초에 한 번 위치 수집, 1분에 한 번 주소 저장 => 1200개 위치 데이터, 20s 소요 성능 개선
fun updateAddress( path: List<Location> ) { path .chunked(6) .map {
chunk -> val location = chunk .first() location.address = findAddress( lat = location.lat, lng = location.lng, ) location } // 후략 Java Kotlin private void updateAddress( List<Location> path ) throws InterruptedException { for(int i=0; i<path.size(); i+=6) { Location location = path.get(i); location.setAddress( findAddress( location.getLat(), location.getLng() ) ); } } 약 20분 주행, 1초에 한 번 위치 수집, 5초에 한 번 주소 저장 => 1200개 위치 데이터, 240s 소요 성능 개선
fun updateAddress( path: List<Location> ) { path .chunked(60) .map {
chunk -> val location = chunk .first() location.address = findAddress( lat = location.lat, lng = location.lng, ) location } // 후략 Java Kotlin private void updateAddress( List<Location> path ) throws InterruptedException { for(int i=0; i<path.size(); i+=60) { Location location = path.get(i); location.setAddress( findAddress( location.getLat(), location.getLng() ) ); } } 성능 개선
fun updateAddressAsync( path: List<Location> ) { CoroutineScope(Dispatchers.IO).launch { val deferredPath
= path .chunked(60) .map { locationChunk -> async { val top = locationChunk .first() top.address = findAddress( lat = top.lat, lng = top.lng ) top } } val addressedPath = deferredPath.awaitAll() fun updateAddress( path: List<Location> ) { path .chunked(60) .map { chunk -> val location = chunk .first() location.address = findAddress( lat = location.lat, lng = location.lng, ) location } // 후략 성능 개선
• Coroutine 성능 개선 => 간단한 비동기 처리
다크모드 종료
정리
1. 가독성 향상 2. 유용한 Extension function 3. 간단한 비동기
처리
Come with me, Use Kopring
QnA & EOF