[JAVA-14663] Update Graphql code for Boot 2.7.x changes and move to new module (#12729)

2022-10-07 18:21:41 +01:00
parent ae96297bc2
commit c18ce8a0cf
29 changed files with 452 additions and 249 deletions
@@ -0,0 +1,11 @@
+package com.baeldung.graphql;
+
+import lombok.Data;
+
+@Data
+public class Author {
+
+    private String id;
+    private String name;
+    private String thumbnail;
+}
@@ -0,0 +1,21 @@
+package com.baeldung.graphql;
+
+import org.springframework.graphql.data.method.annotation.SchemaMapping;
+import org.springframework.stereotype.Controller;
+
+import java.util.List;
+
+@Controller
+public class AuthorController {
+
+    private final PostDao postDao;
+
+    public AuthorController(PostDao postDao) {
+        this.postDao = postDao;
+    }
+
+    @SchemaMapping
+    public List<Post> posts(Author author) {
+        return postDao.getAuthorPosts(author.getId());
+    }
+}
@@ -0,0 +1,18 @@
+package com.baeldung.graphql;
+
+import java.util.List;
+
+public class AuthorDao {
+    private final List<Author> authors;
+
+    public AuthorDao(List<Author> authors) {
+        this.authors = authors;
+    }
+
+    public Author getAuthor(String id) {
+        return authors.stream()
+          .filter(author -> id.equals(author.getId()))
+          .findFirst()
+          .orElseThrow(RuntimeException::new);
+    }
+}
@@ -0,0 +1,16 @@
+package com.baeldung.graphql;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
+
+@SpringBootApplication
+@EnableAutoConfiguration(exclude = {SecurityAutoConfiguration.class})
+public class GraphqlApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(GraphqlApplication.class, args);
+    }
+
+}
@@ -0,0 +1,41 @@
+package com.baeldung.graphql;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Configuration
+public class GraphqlConfiguration {
+
+    @Bean
+    public PostDao postDao() {
+        List<Post> posts = new ArrayList<>();
+        for (int postId = 0; postId < 10; ++postId) {
+            for (int authorId = 0; authorId < 10; ++authorId) {
+                Post post = new Post();
+                post.setId("Post" + authorId + postId);
+                post.setTitle("Post " + authorId + ":" + postId);
+                post.setCategory("Post category");
+                post.setText("Post " + postId + " + by author " + authorId);
+                post.setAuthorId("Author" + authorId);
+                posts.add(post);
+            }
+        }
+        return new PostDao(posts);
+    }
+
+    @Bean
+    public AuthorDao authorDao() {
+        List<Author> authors = new ArrayList<>();
+        for (int authorId = 0; authorId < 10; ++authorId) {
+            Author author = new Author();
+            author.setId("Author" + authorId);
+            author.setName("Author " + authorId);
+            author.setThumbnail("http://example.com/authors/" + authorId);
+            authors.add(author);
+        }
+        return new AuthorDao(authors);
+    }
+}
@@ -0,0 +1,14 @@
+package com.baeldung.graphql;
+
+import lombok.Data;
+
+@Data
+public class Post {
+
+    private String id;
+    private String title;
+    private String text;
+    private String category;
+    private String authorId;
+
+}
@@ -0,0 +1,52 @@
+package com.baeldung.graphql;
+
+import org.springframework.graphql.data.method.annotation.Argument;
+import org.springframework.graphql.data.method.annotation.MutationMapping;
+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.UUID;
+
+@Controller
+public class PostController {
+
+    private final PostDao postDao;
+    private final AuthorDao authorDao;
+
+    public PostController(PostDao postDao, AuthorDao authorDao) {
+        this.postDao = postDao;
+        this.authorDao = authorDao;
+    }
+
+    @QueryMapping
+    public List<Post> recentPosts(@Argument int count, @Argument int offset) {
+        return postDao.getRecentPosts(count, offset);
+    }
+
+    @SchemaMapping
+    public Author author(Post post) {
+        return authorDao.getAuthor(post.getAuthorId());
+    }
+
+    @SchemaMapping(typeName="Post", field="first_author")
+    public Author getFirstAuthor(Post post) {
+        return authorDao.getAuthor(post.getAuthorId());
+    }
+
+    @MutationMapping
+    public Post createPost(@Argument String title, @Argument String text,
+      @Argument String category, @Argument String authorId) {
+        Post post = new Post();
+        post.setId(UUID.randomUUID().toString());
+        post.setTitle(title);
+        post.setText(text);
+        post.setCategory(category);
+        post.setAuthorId(authorId);
+        postDao.savePost(post);
+
+        return post;
+    }
+
+}
@@ -0,0 +1,30 @@
+package com.baeldung.graphql;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class PostDao {
+
+    private final List<Post> posts;
+
+    public PostDao(List<Post> posts) {
+        this.posts = posts;
+    }
+
+    public List<Post> getRecentPosts(int count, int offset) {
+        return posts.stream()
+          .skip(offset)
+          .limit(count)
+          .collect(Collectors.toList());
+    }
+
+    public List<Post> getAuthorPosts(String author) {
+        return posts.stream()
+          .filter(post -> author.equals(post.getAuthorId()))
+          .collect(Collectors.toList());
+    }
+
+    public void savePost(Post post) {
+        posts.add(post);
+    }
+}
@@ -0,0 +1,4 @@
+spring:
+  graphql:
+    graphiql:
+      enabled: true
@@ -0,0 +1,25 @@
+type Post {
+    id: ID!
+    title: String!
+    text: String!
+    category: String
+    author: Author!
+    first_author: Author!
+}
+
+type Author {
+    id: ID!
+    name: String!
+    thumbnail: String
+    posts: [Post]!
+}
+
+# The Root Query for the application
+type Query {
+    recentPosts(count: Int, offset: Int): [Post]!
+}
+
+# The Root Mutation for the application
+type Mutation {
+    createPost(title: String!, text: String!, category: String, authorId: String!) : Post!
+}