GraphQL Kotlin 예제 코드 추가 (#13)

* graphql-kotlin initial commit * docs : README.md 및 공식 문서 링크 추가 * build : Spring Web MVC(servlet) stack -> Spring WebFlux(reactive) stack 으로 의존성 변경 * build : GraphQL Kotlin Spring Server 의존성 추가 * add graphql package configuration * docs : graphql package 설정 설명 주석 추가 * docs : GraphQL Kotlin 공식 문서 링크 및 제목 수정 * feat : Schema, Query, Mutation, Subscription 추가 * docs : README.md 항목 수정 * feat : GraphQL Context 구현체 추가
2022-08-02 15:30:28 +09:00
parent c659243c32
commit e05abb53f1
19 changed files with 598 additions and 0 deletions
--- a/작성)/graphql-kotlin/.gitignore
+++ b/작성)/graphql-kotlin/.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/작성)/graphql-kotlin/README.md
+++ b/작성)/graphql-kotlin/README.md
@@ -0,0 +1,14 @@
+# GraphQL Kotlin
+
+- [MVN Repository - GraphQL Kotlin Spring Server](https://mvnrepository.com/artifact/com.expediagroup/graphql-kotlin-spring-server)
+
+## Spring Server
+
+- [Getting Started](https://opensource.expediagroup.com/graphql-kotlin/docs/)
+- [Spring Server Overview](https://opensource.expediagroup.com/graphql-kotlin/docs/server/spring-server/spring-overview/)
+- [Writing Schemas with Spring](https://opensource.expediagroup.com/graphql-kotlin/docs/server/spring-server/spring-schema)
+- [Generating GraphQL Context](https://opensource.expediagroup.com/graphql-kotlin/docs/server/spring-server/spring-graphql-context)
+- [HTTP Request and Response](https://opensource.expediagroup.com/graphql-kotlin/docs/server/spring-server/spring-http-request-response)
+- [Automatically Created Beans](https://opensource.expediagroup.com/graphql-kotlin/docs/server/spring-server/spring-beans)
+- [Configuration Properties](https://opensource.expediagroup.com/graphql-kotlin/docs/server/spring-server/spring-properties)
+- [Subscriptions](https://opensource.expediagroup.com/graphql-kotlin/docs/server/spring-server/spring-subscriptions)
--- a/작성)/graphql-kotlin/build.gradle.kts
+++ b/작성)/graphql-kotlin/build.gradle.kts
@@ -0,0 +1,40 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+	id("org.springframework.boot") version "2.7.2"
+	id("io.spring.dependency-management") version "1.0.12.RELEASE"
+	kotlin("jvm") version "1.6.21"
+	kotlin("plugin.spring") version "1.6.21"
+}
+
+group = "com.banjjoknim"
+version = "0.0.1-SNAPSHOT"
+java.sourceCompatibility = JavaVersion.VERSION_11
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation("org.springframework.boot:spring-boot-starter-webflux")
+	implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
+	implementation("io.projectreactor.kotlin:reactor-kotlin-extensions")
+	implementation("org.jetbrains.kotlin:kotlin-reflect")
+	implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
+	implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactor")
+	testImplementation("org.springframework.boot:spring-boot-starter-test")
+	testImplementation("io.projectreactor:reactor-test")
+
+	implementation("com.expediagroup", "graphql-kotlin-spring-server", "6.0.0")
+}
+
+tasks.withType<KotlinCompile> {
+	kotlinOptions {
+		freeCompilerArgs = listOf("-Xjsr305=strict")
+		jvmTarget = "11"
+	}
+}
+
+tasks.withType<Test> {
+	useJUnitPlatform()
+}
--- a/작성)/graphql-kotlin/gradle/wrapper/gradle-wrapper.jar
+++ b/작성)/graphql-kotlin/gradle/wrapper/gradle-wrapper.jar
--- a/작성)/graphql-kotlin/gradle/wrapper/gradle-wrapper.properties
+++ b/작성)/graphql-kotlin/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
--- a/작성)/graphql-kotlin/gradlew
+++ b/작성)/graphql-kotlin/gradlew
@@ -0,0 +1,240 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
--- a/작성)/graphql-kotlin/gradlew.bat
+++ b/작성)/graphql-kotlin/gradlew.bat
@@ -0,0 +1,91 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
--- a/작성)/graphql-kotlin/settings.gradle.kts
+++ b/작성)/graphql-kotlin/settings.gradle.kts
@@ -0,0 +1 @@
+rootProject.name = "graphql-kotlin"
--- a/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/GraphQLContextFactory.kt
+++ b/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/GraphQLContextFactory.kt
@@ -0,0 +1,31 @@
+package com.banjjoknim.graphqlkotlin
+
+import com.expediagroup.graphql.server.spring.execution.DefaultSpringGraphQLContextFactory
+import org.springframework.stereotype.Component
+import org.springframework.web.reactive.function.server.ServerRequest
+
+/**
+ * # [Generating GraphQL Context](https://opensource.expediagroup.com/graphql-kotlin/docs/server/spring-server/spring-graphql-context)
+ *
+ * graphql-kotlin-spring-server provides a Spring specific implementation of GraphQLContextFactory and the context.
+ *
+ * SpringGraphQLContext (deprecated) - Implements the Spring ServerRequest and federation tracing HTTPRequestHeaders
+ *
+ * SpringGraphQLContextFactory - Generates GraphQL context map with federated tracing information per request
+ *
+ * If you are using graphql-kotlin-spring-server, you should extend DefaultSpringGraphQLContextFactory to automatically support federated tracing.
+ *
+ * Once your application is configured to build your custom GraphQL context map, you can then access it through a data fetching environment argument.
+ *
+ * While executing the query, data fetching environment will be automatically injected to the function input arguments.
+ *
+ * This argument will not appear in the GraphQL schema.
+ */
+@Component
+class GraphQLContextFactory : DefaultSpringGraphQLContextFactory() {
+    override suspend fun generateContextMap(request: ServerRequest): Map<*, Any> {
+        return super.generateContextMap(request) + mapOf(
+            "myCustomValue" to (request.headers().firstHeader("MyHeader") ?: "defaultContext")
+        )
+    }
+}
--- a/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/GraphqlKotlinApplication.kt
+++ b/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/GraphqlKotlinApplication.kt
@@ -0,0 +1,11 @@
+package com.banjjoknim.graphqlkotlin
+
+import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.boot.runApplication
+
+@SpringBootApplication
+class GraphqlKotlinApplication
+
+fun main(args: Array<String>) {
+	runApplication<GraphqlKotlinApplication>(*args)
+}
--- a/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/GraphQLSchema.kt
+++ b/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/GraphQLSchema.kt
@@ -0,0 +1,12 @@
+package com.banjjoknim.graphqlkotlin.person
+
+import com.expediagroup.graphql.generator.annotations.GraphQLDescription
+import com.expediagroup.graphql.server.Schema
+import org.springframework.stereotype.Component
+
+/**
+ * In order to expose your schema directives, queries, mutations, and subscriptions in the GraphQL schema create beans that implement the corresponding marker interface and they will be automatically picked up by graphql-kotlin-spring-server auto-configuration library.
+ */
+@GraphQLDescription("Sample GraphQL Schema")
+@Component
+class GraphQLSchema : Schema
--- a/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/Person.kt
+++ b/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/Person.kt
@@ -0,0 +1,5 @@
+package com.banjjoknim.graphqlkotlin.person
+
+data class Person(
+    var name: String,
+)
--- a/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/PersonMutation.kt
+++ b/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/PersonMutation.kt
@@ -0,0 +1,14 @@
+package com.banjjoknim.graphqlkotlin.person
+
+import com.expediagroup.graphql.server.operations.Mutation
+import org.springframework.stereotype.Component
+
+@Component
+class PersonMutation : Mutation {
+
+    fun changeName(person: Person, newName: String): Person {
+        return person.apply {
+            name = newName
+        }
+    }
+}
--- a/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/PersonQuery.kt
+++ b/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/PersonQuery.kt
@@ -0,0 +1,37 @@
+package com.banjjoknim.graphqlkotlin.person
+
+import com.expediagroup.graphql.generator.annotations.GraphQLIgnore
+import com.expediagroup.graphql.server.operations.Query
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.stereotype.Component
+
+@Component
+class PersonQuery(
+    /**
+     * # Spring Beans
+     *
+     * Since the top level objects are Spring components, Spring will automatically autowire dependent beans as normal.
+     *
+     * Refer to [Spring Documentation](https://docs.spring.io/spring-framework/docs/current/reference/html/) for details.
+     */
+    private val personRepository: PersonRepository
+) : Query {
+
+    fun getPerson(name: String): Person = Person(name)
+
+    /**
+     * # Spring Beans in Arguments
+     *
+     * graphql-kotlin-spring-server provides Spring-aware data fetcher that automatically autowires Spring beans when they are specified as function arguments.
+     *
+     * `@Autowired` arguments should be explicitly excluded from the GraphQL schema by also specifying @GraphQLIgnore.
+     *
+     * ```
+     * NOTE
+     * If you are using custom data fetcher make sure that you extend SpringDataFetcher instead of the base FunctionDataFetcher to keep this functionallity.
+     * ```
+     */
+    fun findPerson(@GraphQLIgnore @Autowired personRepository: PersonRepository, name: String): Person? {
+        return personRepository.findPerson(name)
+    }
+}
--- a/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/PersonRepository.kt
+++ b/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/PersonRepository.kt
@@ -0,0 +1,6 @@
+package com.banjjoknim.graphqlkotlin.person
+
+interface PersonRepository {
+
+    fun findPerson(name: String): Person?
+}
--- a/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/PersonRepositoryImpl.kt
+++ b/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/PersonRepositoryImpl.kt
@@ -0,0 +1,18 @@
+package com.banjjoknim.graphqlkotlin.person
+
+import org.springframework.stereotype.Repository
+
+@Repository
+class PersonRepositoryImpl : PersonRepository {
+
+    companion object {
+        private val people = mapOf(
+            "banjjoknim" to Person("banjjoknim"),
+            "colt" to Person("colt")
+        )
+    }
+
+    override fun findPerson(name: String): Person? {
+        return people[name]
+    }
+}
--- a/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/PersonSubscription.kt
+++ b/작성)/graphql-kotlin/src/main/kotlin/com/banjjoknim/graphqlkotlin/person/PersonSubscription.kt
@@ -0,0 +1,13 @@
+package com.banjjoknim.graphqlkotlin.person
+
+import com.expediagroup.graphql.server.operations.Subscription
+import org.reactivestreams.Publisher
+import org.springframework.stereotype.Component
+
+@Component
+class PersonSubscription : Subscription {
+
+    fun changeName(person: Person, newName: String): Publisher<Person> {
+        return Publisher { println("change name published") }
+    }
+}
--- a/작성)/graphql-kotlin/src/main/resources/application.yaml
+++ b/작성)/graphql-kotlin/src/main/resources/application.yaml
@@ -0,0 +1,10 @@
+# At a minimum, in order for graphql-kotlin-spring-server to automatically configure your GraphQL web server
+#
+# you need to specify a list of supported packages that can be scanned for exposing your schema objects through reflections.
+#
+# You can do this through the spring application config or by overriding the SchemaGeneratorConfig bean.
+#
+# See customization below.
+graphql:
+  packages:
+    - "com.banjjoknim.graphqlkotlin"
--- a/작성)/graphql-kotlin/src/test/kotlin/com/banjjoknim/graphqlkotlin/GraphqlKotlinApplicationTests.kt
+++ b/작성)/graphql-kotlin/src/test/kotlin/com/banjjoknim/graphqlkotlin/GraphqlKotlinApplicationTests.kt
@@ -0,0 +1,13 @@
+package com.banjjoknim.graphqlkotlin
+
+import org.junit.jupiter.api.Test
+import org.springframework.boot.test.context.SpringBootTest
+
+@SpringBootTest
+class GraphqlKotlinApplicationTests {
+
+	@Test
+	fun contextLoads() {
+	}
+
+}