graphql

Author: mama-samba-braima

build.gradle

@@ -15,6 +15,13 @@ repositories {
     mavenCentral()
 }
 
+if (hasProperty('buildScan')) {
+    buildScan {
+        termsOfServiceUrl = 'https://gradle.com/terms-of-service'
+        termsOfServiceAgree = 'yes'
+    }
+}
+
 dependencies {
     implementation 'org.springframework.boot:spring-boot-starter-graphql'
     implementation 'org.springframework.boot:spring-boot-starter-web'

src/main/java/com/amigoscode/Author.java

@@ -0,0 +1,21 @@
+package com.amigoscode;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+
+public record Author(Integer id,
+                     String name) {
+    public static List<Author> authors = Arrays.asList(
+            new Author(1, "Mama Samba"),
+            new Author(2, "Jamila"),
+            new Author(3, "Allah")
+
+    );
+
+    public static Optional<Author> getAuthorById(Integer id) {
+        return authors.stream()
+                .filter(b -> b.id.equals(id))
+                .findFirst();
+    }
+}

src/main/java/com/amigoscode/Book.java

@@ -0,0 +1,23 @@
+package com.amigoscode;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+
+public record Book(Integer id,
+                   String name,
+                   Integer pageCount,
+                   Integer authorId) {
+    public static List<Book> books = Arrays.asList(
+            new Book(1, "Quran", 604, 3),
+            new Book(2, "Harry Potter", 700, 2),
+            new Book(3, "Foobar", 100, 1),
+            new Book(4, "Spring Boot", 344, 2)
+    );
+
+    public static Optional<Book> getBookById(Integer id) {
+        return books.stream()
+                .filter(b -> b.id.equals(id))
+                .findFirst();
+    }
+}

src/main/java/com/amigoscode/BookController.java

@@ -0,0 +1,28 @@
+package com.amigoscode;
+
+import org.springframework.graphql.data.method.annotation.Argument;
+import org.springframework.graphql.data.method.annotation.QueryMapping;
+import org.springframework.graphql.data.method.annotation.SchemaMapping;
+import org.springframework.stereotype.Controller;
+
+import java.util.List;
+import java.util.Optional;
+
+@Controller
+public class BookController {
+
+    @QueryMapping
+    public List<Book> books() {
+        return Book.books;
+    }
+
+    @QueryMapping
+    public Optional<Book> bookById(@Argument Integer id) {
+        return Book.getBookById(id);
+    }
+
+    @SchemaMapping
+    public Optional<Author> author(Book book) {
+        return Author.getAuthorById(book.authorId());
+    }
+}

src/main/java/com/example/graphqpl/GraphqplApplication.java renamed to src/main/java/com/amigoscode/GraphQLApplication.java

@@ -1,13 +1,13 @@
-package com.example.graphqpl;
+package com.amigoscode;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
 @SpringBootApplication
-public class GraphqplApplication {
+public class GraphQLApplication {
 
     public static void main(String[] args) {
-        SpringApplication.run(GraphqplApplication.class, args);
+        SpringApplication.run(GraphQLApplication.class, args);
     }
 
 }

src/main/resources/application.properties

@@ -1 +1,4 @@
 spring.application.name=graphqpl
+spring.graphql.graphiql.enabled=true
+spring.graphql.path=/graphql
+spring.graphql.cors.allowed-origins=http://localhost:3000

src/main/resources/graphql/shema.graphqls

@@ -0,0 +1,16 @@
+type Query {
+    books : [Book]
+    bookById(id: Int): Book
+}
+
+type Book {
+    id: ID
+    name: String
+    pageCount: Int
+    author: Author
+}
+
+type Author {
+    id: ID
+    name: String
+}

src/test/java/com/amigoscode/BookControllerTest.java

@@ -0,0 +1,24 @@
+package com.amigoscode;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.graphql.GraphQlTest;
+import org.springframework.graphql.test.tester.GraphQlTester;
+
+@GraphQlTest(BookController.class)
+class BookControllerTest {
+
+    @Autowired
+    private GraphQlTester graphQlTester;
+
+    @Test
+    void canGetBooks() {
+        graphQlTester
+                .documentName("books")
+                .execute()
+                .path("books")
+                .entityList(Book.class)
+                .hasSize(4);
+
+    }
+}

src/test/java/com/example/graphqpl/GraphqplApplicationTests.java renamed to src/test/java/com/amigoscode/GraphqplApplicationTests.java

@@ -1,4 +1,4 @@
-package com.example.graphqpl;
+package com.amigoscode;
 
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;

src/test/resources/graphql-test/books.graphql

@@ -0,0 +1,11 @@
+query books {
+    books {
+        name
+        pageCount
+        id
+        author {
+            id
+            name
+        }
+    }
+}