훈련소에 입소하기 전, 친구들과 동료들의 편지를 받기 위해 Kotlin과 AWS Lambda를 활용해 간단한 Slack Bot을 만든 경험을 공유하고, Slack Bot을 만들때 적용한 뱅크샐러드 안드로이드 앱의 아키텍쳐에 대해 소개합니다.

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강성훈
DevOps / Rainist
Kotlin과 AWS와 함께라면
육군훈련소도 외롭지 않아

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,
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국방의 의무
납세의 의무
교육의 의무
근로의 의무

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4주동안 못하는 것
1. 회사 소식 듣기
2. 사회 소식 듣기
3. 개발..?

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를 하려 했으나

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)( ) (
C
((

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Statically typed programming language
for modern multiplatform applications
100% interoperable with Java™ and Android™
Statically typed programming language
for modern multiplatform applications
100% interoperable with Java™ and Android™

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https://8thlight.com/blog/uncle-bob/2012/08/13/the-clean-architecture.html

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data class Recipient(
val birthday: LocalDate,
val enterDate: LocalDate,
val name: String,
val regiment: Int,
val company: Int,
val platoon: Int
)

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interface KATCRepository {
fun getRecipients(
name: String,
birthday: LocalDate,
enterDate: LocalDate
): Single<List<Recipient>>
}
interface KATCRepository {
fun getRecipients(
name: String,
birthday: LocalDate,
enterDate: LocalDate
): Single<List<Recipient>>
}

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class SendRecipientDataIfExists(
private val katcRepository: KATCRepository,
private val messageRepository: MessageRepository,
private val naverNewsRepository: NaverNewsRepository,
private val slackRepository: SlackRepository
) : RequestHandler<InputStream, Unit> {
override fun handleRequest(input: InputStream, context: Context) =
katcRepository.getRecipients(...)
class SendRecipientDataIfExists(
private val katcRepository: KATCRepository,
private val messageRepository: MessageRepository,
private val naverNewsRepository: NaverNewsRepository,
private val slackRepository: SlackRepository
) : RequestHandler<InputStream, Unit> {
override fun handleRequest(input: InputStream, context: Context) =
katcRepository.getRecipients(...)

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override fun getRecipients(
name: String,
birthday: LocalDate,
enterDate: LocalDate
): Single<List<Recipient>> =
Single.fromCallable {
Network.client
.newCall(
Request.Builder()
.url(recipientQueryUrl)
.post(buildRecipientQuery(name, birthday, enterDate))
.build()
).execute()
}...
override fun getRecipients(
name: String,
birthday: LocalDate,
enterDate: LocalDate
): Single<List<Recipient>> =
Single.fromCallable {
Network.client
.newCall(
Request.Builder()
.url(recipientQueryUrl)
.post(buildRecipientQuery(name, birthday, enterDate))
.build()
).execute()
}...

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build.gradle
ext {
mainClassName = 'io.devholic.epilogue.App'
}
jar {
manifest {
attributes 'Main-Class': "$mainClassName"
}
from {
configurations.compile.collect {
it.isDirectory() ? it : zipTree(it)
}
}
}

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travis.yml
language: java
jdk:
- oraclejdk8
install:
- pip install --user awscli
- gradle jar
after_success:
- make upload

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deploy.sh
#!/usr/bin/env bash
set -e
if [ "$TRAVIS_BRANCH" == "master" ]; then
aws lambda update-function-code
--zip-file=fileb://build/libs/epilogue.jar
--region=$LAMBDA_REGION
--function-name=$LAMBDA_FUNCTION_NAME
--query 'LastModified'
fi

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, / ,
/ / /

39. Q&A