feat(GH-235): added Relay Connection support

graphql-jpa-query-autoconfigure/src/main/java/com/introproventures/graphql/jpa/query/autoconfigure/GraphQLJpaQueryProperties.java

@@ -50,6 +50,11 @@ public class GraphQLJpaQueryProperties {
      * Set default value for optional argument for join fetch collections.
      */
     private boolean toManyDefaultOptional = true;
+
+    /**
+     * Enable or disable GraphQL Relay Connection support. Default is false
+     */
+    private boolean enableRelay = false;
 
     /**
      * Enable or disable QraphQL module services.
@@ -158,5 +163,15 @@ public boolean isToManyDefaultOptional() {
     public void setToManyDefaultOptional(boolean toManyDefaultOptional) {
         this.toManyDefaultOptional = toManyDefaultOptional;
     }
+
+
+    public boolean isEnableRelay() {
+        return enableRelay;
+    }
+
+
+    public void setEnableRelay(boolean enableRelay) {
+        this.enableRelay = enableRelay;
+    }
 
 }

graphql-jpa-query-boot-starter/src/main/java/com/introproventures/graphql/jpa/query/boot/autoconfigure/GraphQLJpaQueryAutoConfiguration.java

@@ -16,15 +16,16 @@
 package com.introproventures.graphql.jpa.query.boot.autoconfigure;
 
 import javax.persistence.EntityManager;
+import javax.persistence.EntityManagerFactory;
 
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnSingleCandidate;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
 import com.introproventures.graphql.jpa.query.autoconfigure.GraphQLSchemaConfigurer;
-import com.introproventures.graphql.jpa.query.autoconfigure.GraphQLShemaRegistration;
 import com.introproventures.graphql.jpa.query.schema.GraphQLExecutor;
 import com.introproventures.graphql.jpa.query.schema.GraphQLSchemaBuilder;
 import com.introproventures.graphql.jpa.query.schema.impl.GraphQLJpaExecutor;
@@ -38,21 +39,22 @@
 @ConditionalOnProperty(name="spring.graphql.jpa.query.enabled", havingValue="true", matchIfMissing=true)
 public class GraphQLJpaQueryAutoConfiguration {
 
-    @Configuration
-    public static class GraphQLJpaQuerySchemaConfigurer implements GraphQLSchemaConfigurer {
-
-        private final GraphQLSchemaBuilder graphQLSchemaBuilder;
-
-        public GraphQLJpaQuerySchemaConfigurer(GraphQLSchemaBuilder graphQLSchemaBuilder) {
-            this.graphQLSchemaBuilder = graphQLSchemaBuilder;
-        }
-
-        @Override
-        public void configure(GraphQLShemaRegistration registry) {
-            registry.register(graphQLSchemaBuilder.build());
-        }
+    @Bean
+    @ConditionalOnMissingBean
+    @ConditionalOnSingleCandidate(EntityManagerFactory.class)
+    public GraphQLSchemaBuilder graphQLSchemaBuilder(final EntityManagerFactory entityManagerFactory) {
+        return new GraphQLJpaSchemaBuilder(entityManagerFactory.createEntityManager());
     }
 
+    @Bean
+    @ConditionalOnMissingBean
+    public GraphQLSchemaConfigurer graphQLJpaQuerySchemaConfigurer(GraphQLSchemaBuilder graphQLSchemaBuilder) {
+
+        return (registry) -> {
+            registry.register(graphQLSchemaBuilder.build());
+        };
+    }    
+
     @Configuration
     public static class DefaultGraphQLJpaQueryConfiguration {
 

graphql-jpa-query-example-relay/pom.xml

@@ -0,0 +1,67 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <artifactId>graphql-jpa-query-example-relay</artifactId>
+
+  <parent>
+    <groupId>com.introproventures</groupId>
+    <artifactId>graphql-jpa-query-build</artifactId>
+    <version>0.3.38-SNAPSHOT</version>
+    <relativePath>../graphql-jpa-query-build</relativePath>
+  </parent>
+
+  <properties>
+    <maven.deploy.skip>true</maven.deploy.skip>
+    <skipDocker>false</skipDocker>
+  </properties>
+
+  <dependencies>
+
+    <dependency>
+      <groupId>com.introproventures</groupId>
+      <artifactId>graphql-jpa-query-boot-starter</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>com.introproventures</groupId>
+      <artifactId>graphql-jpa-query-graphiql</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>com.introproventures</groupId>
+      <artifactId>graphql-jpa-query-example-model-books</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>com.h2database</groupId>
+      <artifactId>h2</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>org.projectlombok</groupId>
+      <artifactId>lombok</artifactId>
+    </dependency>
+
+  </dependencies>
+
+  <build>
+    <finalName>${project.artifactId}</finalName>
+    <plugins>
+      <plugin>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-maven-plugin</artifactId>
+        <version>1.5.6.RELEASE</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>repackage</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>

graphql-jpa-query-example-relay/src/main/java/com/introproventures/graphql/jpa/query/example/relay/Application.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2017 IntroPro Ventures, Inc. and/or its affiliates.
+ *
+ * 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
+ *
+ *       http://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.
+ */
+package com.introproventures.graphql.jpa.query.example.relay;
+
+import javax.persistence.EntityManager;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.domain.EntityScan;
+import org.springframework.context.annotation.Configuration;
+
+import com.introproventures.graphql.jpa.query.autoconfigure.GraphQLJpaQueryProperties;
+import com.introproventures.graphql.jpa.query.autoconfigure.GraphQLSchemaConfigurer;
+import com.introproventures.graphql.jpa.query.autoconfigure.GraphQLShemaRegistration;
+import com.introproventures.graphql.jpa.query.schema.impl.GraphQLJpaSchemaBuilder;
+import com.introproventures.graphql.jpa.query.schema.model.book.Book;
+
+/**
+ * GraphQL JPA Query Example Relay with Spring Boot Autoconfiguration
+ * 
+ * You can configure GraphQL JPA Query properties in application.yml 
+ * 
+ * @author Igor Dianov
+ *
+ */
+@SpringBootApplication
+@EntityScan(basePackageClasses=Book.class)
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+    @Configuration
+    public static class GraphQLJpaQuerySchemaConfigurer implements GraphQLSchemaConfigurer {
+
+        private final EntityManager entityManager;
+
+        @Autowired
+        private GraphQLJpaQueryProperties properties;
+
+        public GraphQLJpaQuerySchemaConfigurer(EntityManager entityManager) {
+            this.entityManager = entityManager;
+        }
+
+        @Override
+        public void configure(GraphQLShemaRegistration registry) {
+            registry.register(
+                    new GraphQLJpaSchemaBuilder(entityManager)
+                        .name(properties.getName())
+                        .description(properties.getDescription())
+                        .useDistinctParameter(properties.isUseDistinctParameter())
+                        .defaultDistinct(properties.isDefaultDistinct())
+                        .enableRelay(properties.isEnableRelay())
+                        .build()
+            );
+        }
+    }    
+
+}

graphql-jpa-query-example-relay/src/main/resources/application.yml

@@ -0,0 +1,22 @@
+spring:
+  jpa:
+    hibernate.ddl-auto: create-drop
+    generate-ddl: true
+    show-sql: true
+    open-in-view: false
+    properties:
+      hibernate.format_sql: true
+  h2:
+    console.enabled: true
+
+  graphql:
+    jpa:
+      query:
+        name: BooksRelay
+        description: GraphQL Jpa Query Books Relay Example
+        enable-relay: true
+
+logging:
+  level:
+    com.introproventures.graphql.jpa.query.schema: DEBUG
+

graphql-jpa-query-example-relay/src/main/resources/data.sql

@@ -0,0 +1,26 @@
+-- Books
+insert into author (id, name, genre) values (1, 'Leo Tolstoy', 'NOVEL');
+insert into book (id, title, author_id, genre, publication_date, description)
+values (2, 'War and Peace', 1, 'NOVEL', '1869-01-01', 'The novel chronicles the history of the French invasion of Russia and the impact of the Napoleonic era on Tsarist society through the stories of five Russian aristocratic families.');
+insert into book (id, title, author_id, genre, publication_date, description)
+values (3, 'Anna Karenina', 1, 'NOVEL', '1877-04-01', 'A complex novel in eight parts, with more than a dozen major characters, it is spread over more than 800 pages (depending on the translation), typically contained in two volumes.');
+insert into author (id, name, genre) values (4, 'Anton Chekhov', 'PLAY');
+insert into book (id, title, author_id, genre, publication_date, description)
+values (5, 'The Cherry Orchard', 4, 'PLAY', '1904-01-17', 'The play concerns an aristocratic Russian landowner who returns to her family estate (which includes a large and well-known cherry orchard) just before it is auctioned to pay the mortgage.');
+insert into book (id, title, author_id, genre, publication_date, description)
+values (6, 'The Seagull', 4, 'PLAY', '1896-10-17', 'It dramatises the romantic and artistic conflicts between four characters');
+insert into book (id, title, author_id, genre, publication_date, description)
+values (7, 'Three Sisters', 4, 'PLAY', '1900-01-01', 'The play is sometimes included on the short list of Chekhov''s outstanding plays, along with The Cherry Orchard, The Seagull and Uncle Vanya.[1]');
+insert into author (id, name, genre) values (8, 'Igor Dianov', 'JAVA');
+
+insert into book_tags (book_id, tags) values (2, 'war'), (2, 'piece');
+insert into book_tags (book_id, tags) values (3, 'anna'), (3, 'karenina');
+insert into book_tags (book_id, tags) values (5, 'cherry'), (5, 'orchard');
+insert into book_tags (book_id, tags) values (6, 'seagull');
+insert into book_tags (book_id, tags) values (7, 'three'), (7, 'sisters');
+
+insert into author_phone_numbers(phone_number, author_id) values
+	('1-123-1234', 1),
+	('1-123-5678', 1),
+	('4-123-1234', 4),
+	('4-123-5678', 4);

graphql-jpa-query-example-relay/src/test/java/com/introproventures/graphql/jpa/query/example/relay/ApplicationTest.java

@@ -0,0 +1,18 @@
+package com.introproventures.graphql.jpa.query.example.relay;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment=WebEnvironment.RANDOM_PORT)
+public class ApplicationTest {
+
+    @Test
+    public void contextLoads() {
+        // success
+    }
+
+}