Task: Add Netflix DGS framework and DGS codegen for GraphQL and still issued with subscriptions that not work on server and add some configurations and add webflux included web starter and removed all graphql kickstart and add frontend client with apollo client and react in typescript for graphql demo

src/main/kotlin/com/cubetiqs/graphql/demo/config/GraphQLConfig.kt

@@ -1,15 +1,6 @@
 package com.cubetiqs.graphql.demo.config
 
-import graphql.scalars.ExtendedScalars
-import graphql.schema.idl.RuntimeWiring
-import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.Configuration
 
 @Configuration
-class GraphQLConfig {
-    @Bean
-    fun extendsScalars(): RuntimeWiring.Builder {
-        return RuntimeWiring.newRuntimeWiring()
-            .scalar(ExtendedScalars.DateTime)
-    }
-}
+class GraphQLConfig

src/main/kotlin/com/cubetiqs/graphql/demo/config/WebConfig.kt

@@ -0,0 +1,18 @@
+package com.cubetiqs.graphql.demo.config
+
+import org.springframework.context.annotation.Configuration
+import org.springframework.web.servlet.config.annotation.CorsRegistry
+import org.springframework.web.servlet.config.annotation.EnableWebMvc
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer
+
+@Configuration
+@EnableWebMvc
+class WebConfig : WebMvcConfigurer {
+    override fun addCorsMappings(corsRegistry: CorsRegistry) {
+        println("Hello World")
+        corsRegistry.addMapping("/**")
+            .allowedOrigins("*")
+            .allowedMethods("*")
+            .maxAge(3600)
+    }
+}

src/main/kotlin/com/cubetiqs/graphql/demo/context/GMutation.kt

@@ -1,12 +1,8 @@
 package com.cubetiqs.graphql.demo.context
 
-import org.springframework.core.annotation.AliasFor
-import org.springframework.stereotype.Component
+import com.netflix.graphql.dgs.DgsComponent
 
 @Retention(AnnotationRetention.RUNTIME)
 @Target(AnnotationTarget.CLASS)
-@Component
-annotation class GMutation(
-    @get:AliasFor(annotation = Component::class)
-    val value: String = "",
-)
+@DgsComponent
+annotation class GMutation

src/main/kotlin/com/cubetiqs/graphql/demo/context/GQuery.kt

@@ -1,12 +1,8 @@
 package com.cubetiqs.graphql.demo.context
 
-import org.springframework.core.annotation.AliasFor
-import org.springframework.stereotype.Component
+import com.netflix.graphql.dgs.DgsComponent
 
 @Retention(AnnotationRetention.RUNTIME)
 @Target(AnnotationTarget.CLASS)
-@Component
-annotation class GQuery(
-    @get:AliasFor(annotation = Component::class)
-    val value: String = "",
-)
+@DgsComponent
+annotation class GQuery

src/main/kotlin/com/cubetiqs/graphql/demo/context/GSubscription.kt

@@ -0,0 +1,8 @@
+package com.cubetiqs.graphql.demo.context
+
+import com.netflix.graphql.dgs.DgsComponent
+
+@Retention(AnnotationRetention.RUNTIME)
+@Target(AnnotationTarget.CLASS)
+@DgsComponent
+annotation class GSubscription

src/main/kotlin/com/cubetiqs/graphql/demo/resolver/mutation/AccountMutationResolver.kt

@@ -6,20 +6,26 @@ import com.cubetiqs.graphql.demo.domain.account.AccountInput
 import com.cubetiqs.graphql.demo.domain.account.AccountMapper
 import com.cubetiqs.graphql.demo.repository.AccountRepository
 import com.cubetiqs.graphql.demo.repository.UserRepository
-import graphql.kickstart.tools.GraphQLMutationResolver
+import com.netflix.graphql.dgs.DgsData
+import com.netflix.graphql.dgs.DgsMutation
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.transaction.annotation.Propagation
 import org.springframework.transaction.annotation.Transactional
 
 @GMutation
-class AccountMutationResolver @Autowired constructor(
-    private val accountRepository: AccountRepository,
-    private val userRepository: UserRepository,
-) : GraphQLMutationResolver {
+class AccountMutationResolver {
+    @Autowired
+    private lateinit var accountRepository: AccountRepository
+
+    @Autowired
+    private lateinit var userRepository: UserRepository
+
+    @DgsData(parentType = "Mutation", field = "openAccount")
     @Transactional(propagation = Propagation.REQUIRES_NEW)
     fun openAccount(input: AccountInput): Account {
         val account = AccountMapper.fromInputToAccount(input)
-        val user = userRepository.findById(input.userId ?: 0).orElse(null) ?: throw Exception("User not found to open an account!")
+        val user = userRepository.findById(input.userId ?: 0).orElse(null)
+            ?: throw Exception("User not found to open an account!")
         account.user = user
         return accountRepository.save(account)
     }

src/main/kotlin/com/cubetiqs/graphql/demo/resolver/mutation/UserMutationResolver.kt

@@ -5,7 +5,7 @@ import com.cubetiqs.graphql.demo.domain.user.User
 import com.cubetiqs.graphql.demo.domain.user.UserInput
 import com.cubetiqs.graphql.demo.domain.user.UserMapper
 import com.cubetiqs.graphql.demo.repository.UserRepository
-import graphql.kickstart.tools.GraphQLMutationResolver
+import com.netflix.graphql.dgs.DgsMutation
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.transaction.annotation.Propagation
 import org.springframework.transaction.annotation.Transactional
@@ -13,7 +13,8 @@ import org.springframework.transaction.annotation.Transactional
 @GMutation
 class UserMutationResolver @Autowired constructor(
     private val userRepository: UserRepository,
-) : GraphQLMutationResolver {
+) {
+    @DgsMutation(field = "createUser")
     @Transactional(propagation = Propagation.REQUIRES_NEW)
     fun createUser(input: UserInput): User {
         if (userRepository.existsAllByUsername(input.username ?: "")) throw Exception("Username has been already existed!")

src/main/kotlin/com/cubetiqs/graphql/demo/resolver/query/AccountQueryResolver.kt

@@ -3,14 +3,15 @@ package com.cubetiqs.graphql.demo.resolver.query
 import com.cubetiqs.graphql.demo.context.GQuery
 import com.cubetiqs.graphql.demo.domain.account.Account
 import com.cubetiqs.graphql.demo.repository.AccountRepository
-import graphql.kickstart.tools.GraphQLQueryResolver
+import com.netflix.graphql.dgs.DgsQuery
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.data.domain.Pageable
 
 @GQuery
 class AccountQueryResolver @Autowired constructor(
     private val accountRepository: AccountRepository,
-) : GraphQLQueryResolver {
+) {
+    @DgsQuery(field = "fetchAccounts")
     fun fetchAccounts(): Collection<Account> {
         val accounts = accountRepository.findAll(Pageable.unpaged())
         return accounts.content

src/main/kotlin/com/cubetiqs/graphql/demo/resolver/query/HelloQueryResolver.kt

@@ -1,13 +1,19 @@
 package com.cubetiqs.graphql.demo.resolver.query
 
 import com.cubetiqs.graphql.demo.context.GQuery
-import graphql.kickstart.tools.GraphQLQueryResolver
+import com.netflix.graphql.dgs.DgsQuery
 import reactor.core.publisher.Mono
 import java.util.concurrent.CompletableFuture
 
 @GQuery
-class HelloQueryResolver : GraphQLQueryResolver {
+class HelloQueryResolver {
+    @DgsQuery(field = "hello")
     fun hello(): CompletableFuture<String> {
         return Mono.just("Hello Query...!").toFuture()
     }
+
+    @DgsQuery(field = "helloByName")
+    fun helloByName(name: String): CompletableFuture<String> {
+        return Mono.just("Hello $name...!").toFuture()
+    }
 }

src/main/kotlin/com/cubetiqs/graphql/demo/resolver/query/UserQueryResolver.kt

@@ -3,14 +3,15 @@ package com.cubetiqs.graphql.demo.resolver.query
 import com.cubetiqs.graphql.demo.context.GQuery
 import com.cubetiqs.graphql.demo.domain.user.User
 import com.cubetiqs.graphql.demo.repository.UserRepository
-import graphql.kickstart.tools.GraphQLQueryResolver
+import com.netflix.graphql.dgs.DgsQuery
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.data.domain.Pageable
 
 @GQuery
 class UserQueryResolver @Autowired constructor(
     private val userRepository: UserRepository,
-) : GraphQLQueryResolver {
+) {
+    @DgsQuery(field = "fetchUsers")
     fun fetchUsers(): Collection<User> {
         val users = userRepository.queryAllByEnabledIsTrue(Pageable.unpaged())
         return users.content

src/main/kotlin/com/cubetiqs/graphql/demo/resolver/subscription/HelloSubscriptionResolver.kt

@@ -1,14 +1,15 @@
 package com.cubetiqs.graphql.demo.resolver.subscription
 
-import graphql.kickstart.tools.GraphQLSubscriptionResolver
+import com.cubetiqs.graphql.demo.context.GSubscription
+import com.netflix.graphql.dgs.DgsSubscription
 import graphql.schema.DataFetchingEnvironment
 import org.reactivestreams.Publisher
-import org.springframework.stereotype.Service
 import reactor.core.publisher.Flux
 import java.time.Duration
 
-@Service
-class HelloSubscriptionResolver : GraphQLSubscriptionResolver {
+@GSubscription
+class HelloSubscriptionResolver {
+    @DgsSubscription(field = "hello")
     fun hello(env: DataFetchingEnvironment): Publisher<Int> {
         return Flux.range(1, 10).delayElements(Duration.ofSeconds(1))
     }

src/main/resources/application.yml

@@ -17,7 +17,8 @@ spring:
     properties:
       hibernate:
         enable_lazy_load_no_trans: ${HIBERNATE_LAZY_NO_TRANS:true}
-
+  main:
+    allow-bean-definition-overriding: true
 # Spring Boot Actuator
 management:
   endpoints:
@@ -25,15 +26,8 @@ management:
       exposure:
         include: health,info,metrics
 
-# GraphQL Voyager
-voyager:
-  enabled: true
-  cdn:
-    enabled: false
-
-# GraphQL Playground
-graphql:
-  playground:
-      enabled: true
-      cdn:
-        enabled: false
+# DGS GraphQL
+dgs:
+  graphql:
+    graphiql:
+      enabled: true

src/main/resources/schema.graphqls

@@ -1,59 +0,0 @@
-enum AccountType {
-    BASIC
-    PREMIUM
-    BUSINESS
-}
-
-enum AccountCurrency {
-    USD
-    KHR
-}
-
-type User {
-    id: ID
-    code: String
-    username: String
-    name: String
-    enabled: Boolean
-}
-
-type Account {
-    id: ID
-    code: String
-    balance: Float
-    currentBalance: Float
-    type: AccountType
-    currency: AccountCurrency
-    user: User!
-}
-
-input UserInput {
-    username: String
-    password: String
-    name: String
-    enabled: Boolean
-}
-
-input AccountInput {
-    userId: Int
-    type: AccountType
-    currency: AccountCurrency
-}
-
-type Query {
-    hello: String
-
-    fetchUsers: [User]!
-
-    fetchAccounts: [Account]!
-}
-
-type Subscription {
-    hello: Int
-}
-
-type Mutation {
-    createUser(input: UserInput): User!
-
-    openAccount(input: AccountInput): Account!
-}

src/main/resources/schema/account.graphql

@@ -0,0 +1,26 @@
+enum AccountType {
+    BASIC
+    PREMIUM
+    BUSINESS
+}
+
+enum AccountCurrency {
+    USD
+    KHR
+}
+
+type Account {
+    id: ID
+    code: String
+    balance: Float
+    currentBalance: Float
+    type: AccountType
+    currency: AccountCurrency
+    user: User!
+}
+
+input AccountInput {
+    userId: Int
+    type: AccountType
+    currency: AccountCurrency
+}

src/main/resources/schema/expense.graphql

@@ -0,0 +1,16 @@
+input ExpenseFilter {
+    isIncome: Boolean
+}
+
+type Expense {
+    id: ID
+    description: String
+    amount: Int
+    isIncome: Boolean
+}
+
+type ExpensePage {
+    list: [Expense]
+    totalPages: Int
+    currentPage: Int
+}

src/main/resources/schema/schema.graphqls

@@ -0,0 +1,21 @@
+type Query {
+    hello: String
+
+    helloByName(name: String!): String
+
+    fetchUsers: [User]!
+
+    fetchAccounts: [Account]!
+
+    fetchExpenses(filter: ExpenseFilter, pageNumber: Int, pageSize: Int) : ExpensePage
+}
+
+type Subscription {
+    hello: Int
+}
+
+type Mutation {
+    createUser(input: UserInput): User!
+
+    openAccount(input: AccountInput): Account!
+}

src/main/resources/schema/user.graphql

@@ -0,0 +1,14 @@
+type User {
+    id: ID
+    code: String
+    username: String
+    name: String
+    enabled: Boolean
+}
+
+input UserInput {
+    username: String
+    password: String
+    name: String
+    enabled: Boolean
+}

src/test/kotlin/com/cubetiqs/graphql/demo/GraphqlDemoApplicationTests.kt

@@ -1,13 +1,55 @@
 package com.cubetiqs.graphql.demo
 
+import com.cubetiqs.graphql.demo.resolver.subscription.HelloSubscriptionResolver
+import com.netflix.graphql.dgs.DgsQueryExecutor
+import com.netflix.graphql.dgs.autoconfig.DgsAutoConfiguration
+import graphql.ExecutionResult
 import org.junit.jupiter.api.Test
+import org.reactivestreams.Publisher
+import org.reactivestreams.Subscriber
+import org.reactivestreams.Subscription
+import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.boot.test.context.SpringBootTest
 
-@SpringBootTest
+@SpringBootTest(
+    classes = [
+        DgsAutoConfiguration::class,
+        HelloSubscriptionResolver::class,
+    ]
+)
 class GraphqlDemoApplicationTests {
+    @Autowired
+    lateinit var dgsQueryExecutor: DgsQueryExecutor
 
-	@Test
-	fun contextLoads() {
-	}
+    @Test
+    fun helloSubscription() {
+        dgsQueryExecutor.execute(
+            """
+            subscription {
+              hello
+            }
+        """.trimIndent()
+        )
+            .getData<Publisher<ExecutionResult>>()
+            .subscribe(object : Subscriber<ExecutionResult> {
+                override fun onSubscribe(s: Subscription) {
+                    s.request(2)
+                }
+
+                override fun onNext(t: ExecutionResult) {
+                    println(t.getData<Any?>())
+                }
+
+                override fun onError(t: Throwable?) {
+
+                }
+
+                override fun onComplete() {
+                    println("Hello World")
+                }
+            }
+
+            )
+    }
 
 }