Spring REST Controller Not Starting - spring

Question

pom.xml
<groupId>com.ibm.springboot</groupId>
<artifactId>spring-boot-api</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>spring-boot-api</name>
<description>Spring API DATA</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.14.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derby</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-commons</artifactId>
<version>2.0.1.RELEASE</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
SpringBootApiApplication.java
#SpringBootApplication
#ComponentScan("com.ibm.springboot.*")
#EntityScan("com.ibm.springboot.topics.Topic")
#EnableJpaRepositories("com.ibm.springboot.topics.TopicRepository")
public class SpringBootApiApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootApiApplication.class, args);
}
}
Topic.java
#Entity
public class Topic {
#Id
private String id;
private String name;
private String description;
public Topic(String id, String name, String description) {
super();
this.id = id;
this.name = name;
this.description = description;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
TopicController.java
#RestController
public class TopicController {
#Autowired
TopicService topicService;
#RequestMapping("/topics")
public List<Topic> getAllTopics(){
return topicService.getAllTopics();
}
#RequestMapping(method=RequestMethod.POST,value="/topics")
public void addTopic(#RequestBody Topic topic){
topicService.addTopic(topic);
}
}
TopicRepository.java
#Repository
public interface TopicRepository extends CrudRepository<Topic, String>{
}
TopicService.java
#Service
public class TopicService {
#Autowired
TopicRepository topicRepository;
public List<Topic> getAllTopics(){
List<Topic> topics = new ArrayList<>();
topicRepository.findAll().forEach(topics::add);
return topics;
}
public void addTopic(Topic topic){
// topics.add(topic);
topicRepository.save(topic);
}
}
While I am running the main class , I am getting the following error.
APPLICATION FAILED TO START
Description:
Field topicRepository in com.ibm.springboot.topics.TopicService
required a bean of type 'com.ibm.springboot.topics.TopicRepository'
that could not be found.
Action:
Consider defining a bean of type 'com.ibm.springboot.topics.TopicRepository' in your configuration.
I have checked all the related suggestion given here, but nothing clicked.Please help

Answer 1

Remove the #Repository annotation from your TopicRepository interface.
Should be (no annotation over it):
public interface TopicRepository extends CrudRepository{
}
EDIT
Change your:
#EnableJpaRepositories("com.ibm.springboot.topics.TopicRepository")
To:
#EnableJpaRepositories(basePackageClasses= {com.ibm.springboot.topics.TopicRepository.class})