BAEL-2840 - Spring Data Web Support (#6672)

* Initial Commit

* Update UserRepository.java

* Update UserControllerIntegrationTest.java

* Update UserRepository.java

* Update pom.xml

spring-data-rest/pom.xml

@@ -3,7 +3,6 @@
          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>spring-data-rest</artifactId>
-    
     <version>1.0</version>
     <name>spring-data-rest</name>
     <packaging>jar</packaging>
@@ -21,6 +20,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-rest</artifactId>
@@ -30,12 +33,21 @@
             <artifactId>spring-boot-starter-data-jpa</artifactId>
         </dependency>
         <dependency>
-            <groupId>com.h2database</groupId>
+            <groupId>org.springframework.boot</groupId>
-            <artifactId>h2</artifactId>
+            <artifactId>spring-boot-autoconfigure</artifactId>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-autoconfigure</artifactId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.querydsl</groupId>
+            <artifactId>querydsl-apt</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.querydsl</groupId>
+            <artifactId>querydsl-jpa</artifactId>
         </dependency>
         <dependency>
             <groupId>org.xerial</groupId>
@@ -45,9 +57,33 @@
 
     <build>
         <finalName>${project.artifactId}</finalName>
+        <plugins>
+            <plugin>
+                <groupId>com.mysema.maven</groupId>
+                <artifactId>maven-apt-plugin</artifactId>
+                <version>1.0</version>
+                <executions>
+                    <execution>
+                        <phase>generate-sources</phase>
+                        <goals>
+                            <goal>process</goal>
+                        </goals>
+                        <configuration>
+                            <outputDirectory>target/generated-sources</outputDirectory>
+                            <processor>com.querydsl.apt.jpa.JPAAnnotationProcessor</processor>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
     </build>
 
     <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <start-class>com.baeldung.SpringDataRestApplication</start-class>
     </properties>
 

spring-data-rest/src/main/java/com/baeldung/springdatawebsupport/application/Application.java

@@ -0,0 +1,28 @@
+package com.baeldung.springdatawebsupport.application;
+
+import com.baeldung.springdatawebsupport.application.entities.User;
+import com.baeldung.springdatawebsupport.application.repositories.UserRepository;
+import java.util.stream.Stream;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+    @Bean
+    CommandLineRunner initialize(UserRepository userRepository) {
+        return args -> {
+            Stream.of("John", "Robert", "Nataly", "Helen", "Mary").forEach(name -> {
+                User user = new User(name);
+                userRepository.save(user);
+            });
+            userRepository.findAll().forEach(System.out::println);
+        };
+    }
+}

spring-data-rest/src/main/java/com/baeldung/springdatawebsupport/application/controllers/UserController.java

@@ -0,0 +1,47 @@
+package com.baeldung.springdatawebsupport.application.controllers;
+
+import com.baeldung.springdatawebsupport.application.entities.User;
+import com.baeldung.springdatawebsupport.application.repositories.UserRepository;
+import com.querydsl.core.types.Predicate;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.domain.Sort;
+import org.springframework.data.querydsl.binding.QuerydslPredicate;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class UserController {
+
+    private final UserRepository userRepository;
+
+    @Autowired
+    public UserController(UserRepository userRepository) {
+        this.userRepository = userRepository;
+    }
+
+    @GetMapping("/users/{id}")
+    public User findUserById(@PathVariable("id") User user) {
+        return user;
+    }
+
+    @GetMapping("/users")
+    public Page<User> findAllUsers(Pageable pageable) {
+        return userRepository.findAll(pageable);
+    }
+	
+    @GetMapping("/sortedusers")
+    public Page<User> findAllUsersSortedByName() {
+        Pageable pageable = PageRequest.of(0, 5, Sort.by("name"));
+        return userRepository.findAll(pageable);
+    }
+
+    @GetMapping("/filteredusers")
+    public Iterable<User> getUsersByQuerydslPredicate(@QuerydslPredicate(root = User.class) Predicate predicate) {
+        return userRepository.findAll(predicate);
+    }
+}

spring-data-rest/src/main/java/com/baeldung/springdatawebsupport/application/entities/User.java

@@ -0,0 +1,38 @@
+package com.baeldung.springdatawebsupport.application.entities;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "users")
+public class User {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private long id;
+    private final String name;
+
+    public User() {
+        this.name = "";
+    }
+
+    public User(String name) {
+        this.name = name;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    @Override
+    public String toString() {
+        return "User{" + "id=" + id + ", name=" + name + '}';
+    }
+}

spring-data-rest/src/main/java/com/baeldung/springdatawebsupport/application/repositories/UserRepository.java

@@ -0,0 +1,14 @@
+package com.baeldung.springdatawebsupport.application.repositories;
+
+import com.baeldung.springdatawebsupport.application.entities.User;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.querydsl.QuerydslPredicateExecutor;
+import org.springframework.data.repository.PagingAndSortingRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface UserRepository extends PagingAndSortingRepository<User, Long>, 
+  QuerydslPredicateExecutor<User> {
+
+}

spring-data-rest/src/test/java/com/baeldung/springdatawebsupport/application/test/UserControllerIntegrationTest.java

@@ -0,0 +1,74 @@
+package com.baeldung.springdatawebsupport.application.test;
+
+import com.baeldung.springdatawebsupport.application.controllers.UserController;
+import static org.assertj.core.api.Assertions.assertThat;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@AutoConfigureMockMvc
+public class UserControllerIntegrationTest {
+
+    @Autowired
+    private UserController userController;
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Test
+    public void whenUserControllerInjected_thenNotNull() throws Exception {
+        assertThat(userController).isNotNull();
+    }
+
+    @Test
+    public void whenGetRequestToUsersEndPointWithIdPathVariable_thenCorrectResponse() throws Exception {
+        mockMvc.perform(MockMvcRequestBuilders.get("/users/{id}", "1")
+          .contentType(MediaType.APPLICATION_JSON_UTF8))
+          .andExpect(MockMvcResultMatchers.status().isOk())
+          .andExpect(MockMvcResultMatchers.jsonPath("$.id").value("1"));
+    }
+
+    @Test
+    public void whenGetRequestToUsersEndPoint_thenCorrectResponse() throws Exception {
+        mockMvc.perform(MockMvcRequestBuilders.get("/users")
+          .contentType(MediaType.APPLICATION_JSON_UTF8))
+          .andExpect(MockMvcResultMatchers.status().isOk())
+          .andExpect(MockMvcResultMatchers.jsonPath("$['pageable']['paged']").value("true"));
+
+    }
+
+    @Test
+    public void whenGetRequestToUserEndPointWithNameRequestParameter_thenCorrectResponse() throws Exception {
+        mockMvc.perform(MockMvcRequestBuilders.get("/user")
+          .param("name", "John")
+          .contentType(MediaType.APPLICATION_JSON_UTF8))
+          .andExpect(MockMvcResultMatchers.status().isOk())
+          .andExpect(MockMvcResultMatchers.jsonPath("$['content'][0].['name']").value("John"));
+    }
+
+    @Test
+    public void whenGetRequestToSorteredUsersEndPoint_thenCorrectResponse() throws Exception {
+        mockMvc.perform(MockMvcRequestBuilders.get("/sortedusers")
+          .contentType(MediaType.APPLICATION_JSON_UTF8))
+          .andExpect(MockMvcResultMatchers.status().isOk())
+          .andExpect(MockMvcResultMatchers.jsonPath("$['sort']['sorted']").value("true"));
+    }
+
+    @Test
+    public void whenGetRequestToFilteredUsersEndPoint_thenCorrectResponse() throws Exception {
+        mockMvc.perform(MockMvcRequestBuilders.get("/filteredusers")
+          .param("name", "John")
+          .contentType(MediaType.APPLICATION_JSON_UTF8))
+          .andExpect(MockMvcResultMatchers.status().isOk())
+          .andExpect(MockMvcResultMatchers.jsonPath("$[0].name").value("John"));
+    }
+}