Add HATEOAS sample application

spring-boot-samples/pom.xml

@@ -35,6 +35,7 @@
 		<module>spring-boot-sample-data-rest</module>
 		<module>spring-boot-sample-data-solr</module>
 		<module>spring-boot-sample-flyway</module>
+		<module>spring-boot-sample-hateoas</module>
 		<module>spring-boot-sample-hornetq</module>
 		<module>spring-boot-sample-integration</module>
 		<module>spring-boot-sample-jetty</module>

spring-boot-samples/spring-boot-sample-hateoas/pom.xml

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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>
+	<parent>
+		<!-- Your own application should inherit from spring-boot-starter-parent -->
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-samples</artifactId>
+		<version>1.1.11.BUILD-SNAPSHOT</version>
+	</parent>
+	<artifactId>spring-boot-sample-hateoas</artifactId>
+	<name>Spring Boot Hateoas Sample</name>
+	<description>Spring Boot Hateoas Sample</description>
+	<url>http://projects.spring.io/spring-boot/</url>
+	<organization>
+		<name>Pivotal Software, Inc.</name>
+		<url>http://www.spring.io</url>
+	</organization>
+	<properties>
+		<main.basedir>${basedir}/../..</main.basedir>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.hateoas</groupId>
+			<artifactId>spring-hateoas</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.plugin</groupId>
+			<artifactId>spring-plugin-core</artifactId>
+			<version>1.1.0.RELEASE</version>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+</project>

spring-boot-samples/spring-boot-sample-hateoas/src/main/java/sample/SampleHateoasApplication.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2012-2014 the original author or authors.
+ *
+ * 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 sample;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@EnableAutoConfiguration
+@ComponentScan
+public class SampleHateoasApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SampleHateoasApplication.class, args);
+	}
+
+}

spring-boot-samples/spring-boot-sample-hateoas/src/main/java/sample/domain/Customer.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2012-2014 the original author or authors.
+ *
+ * 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 sample.domain;
+
+public class Customer {
+
+	private final Long id;
+
+	private final String firstName;
+
+	private final String lastName;
+
+	public Customer(Long id, String firstName, String lastName) {
+		this.id = id;
+		this.firstName = firstName;
+		this.lastName = lastName;
+	}
+
+	public Long getId() {
+		return this.id;
+	}
+
+	public String getFirstName() {
+		return this.firstName;
+	}
+
+	public String getLastName() {
+		return this.lastName;
+	}
+
+}

spring-boot-samples/spring-boot-sample-hateoas/src/main/java/sample/domain/CustomerRepository.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2012-2014 the original author or authors.
+ *
+ * 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 sample.domain;
+
+import java.util.List;
+
+public interface CustomerRepository {
+
+	List<Customer> findAll();
+
+	Customer findOne(Long id);
+
+}

spring-boot-samples/spring-boot-sample-hateoas/src/main/java/sample/domain/InMemoryCustomerRepository.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2012-2014 the original author or authors.
+ *
+ * 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 sample.domain;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.stereotype.Repository;
+import org.springframework.util.ObjectUtils;
+
+@Repository
+public class InMemoryCustomerRepository implements CustomerRepository {
+
+	private final List<Customer> customers = new ArrayList<Customer>();
+
+	public InMemoryCustomerRepository() {
+		this.customers.add(new Customer(1L, "Oliver", "Gierke"));
+		this.customers.add(new Customer(2L, "Andy", "Wilkinson"));
+		this.customers.add(new Customer(2L, "Dave", "Syer"));
+	}
+
+	@Override
+	public List<Customer> findAll() {
+		return this.customers;
+	}
+
+	@Override
+	public Customer findOne(Long id) {
+		for (Customer customer : this.customers) {
+			if (ObjectUtils.nullSafeEquals(customer.getId(), id)) {
+				return customer;
+			}
+		}
+		return null;
+	}
+
+}

spring-boot-samples/spring-boot-sample-hateoas/src/main/java/sample/web/CustomerController.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2012-2014 the original author or authors.
+ *
+ * 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 sample.web;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.hateoas.EntityLinks;
+import org.springframework.hateoas.ExposesResourceFor;
+import org.springframework.hateoas.Resource;
+import org.springframework.hateoas.Resources;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+
+import sample.domain.Customer;
+import sample.domain.CustomerRepository;
+
+@Controller
+@RequestMapping("/customers")
+@ExposesResourceFor(Customer.class)
+public class CustomerController {
+
+	private final CustomerRepository repository;
+
+	private final EntityLinks entityLinks;
+
+	@Autowired
+	public CustomerController(CustomerRepository repository, EntityLinks entityLinks) {
+		this.repository = repository;
+		this.entityLinks = entityLinks;
+	}
+
+	@RequestMapping(method = RequestMethod.GET)
+	HttpEntity<Resources<Customer>> showCustomers() {
+		Resources<Customer> resources = new Resources<Customer>(this.repository.findAll());
+		resources.add(this.entityLinks.linkToCollectionResource(Customer.class));
+		return new ResponseEntity<Resources<Customer>>(resources, HttpStatus.OK);
+	}
+
+	@RequestMapping(value = "/{id}", method = RequestMethod.GET)
+	HttpEntity<Resource<Customer>> showCustomer(@PathVariable Long id) {
+		Resource<Customer> resource = new Resource<Customer>(this.repository.findOne(id));
+		resource.add(this.entityLinks.linkToSingleResource(Customer.class, id));
+		return new ResponseEntity<Resource<Customer>>(resource, HttpStatus.OK);
+	}
+
+}

spring-boot-samples/spring-boot-sample-hateoas/src/test/java/sample/SampleHateoasApplicationTests.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2012-2014 the original author or authors.
+ *
+ * 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 sample;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.test.IntegrationTest;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.boot.test.TestRestTemplate;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.startsWith;
+import static org.junit.Assert.assertThat;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(classes = SampleHateoasApplication.class)
+@WebAppConfiguration
+@IntegrationTest("server.port:0")
+@DirtiesContext
+public class SampleHateoasApplicationTests {
+
+	@Value("${local.server.port}")
+	private int port;
+
+	@Test
+	public void hasHalLinks() throws Exception {
+		ResponseEntity<String> entity = new TestRestTemplate().getForEntity(
+				"http://localhost:" + this.port + "/customers/1", String.class);
+		assertThat(entity.getStatusCode(), equalTo(HttpStatus.OK));
+		assertThat(entity.getBody(), startsWith("{\"id\":1,\"firstName\":\"Oliver\""
+				+ ",\"lastName\":\"Gierke\""));
+		assertThat(entity.getBody(), containsString("_links\":{\"self\":{\"href\""));
+	}
+
+}