Spring Data JPA CrudRepository

[Joydeep Bhattacharjee]

Hello I am having some problem while running this . I am getting the following exception . I am trying out the following example CrudRepository for Spring Data, and I face the following


Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'helloCntrl': Unsatisfied dependency expressed through field 'test'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.joydeep.springboot.Test1' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations:{@org.springframework.beans.factory.annotation.Autowired(required=true)}


 

 package com.joydeep.springboot; 
        import org.springframework.data.repository.CrudRepository; 
        import com.joydeep.springboot.vo.Message; 
        public interface Test1 extends CrudRepository<Message, String> { }
   

package com.joydeep.springboot.vo;

import java.util.Date;

import javax.persistence.Entity;
import javax.persistence.Id;


@Entity
public class Message {
    @Id
    private String id;
    private String text;
    private String author;
    private Date created;



    public Message() {
        super();
        // TODO Auto-generated constructor stub
    }
    public Message(String id, String text, String author, Date created) {
        super();
        this.id = id;
        this.text = text;
        this.author = author;
        this.created = created;
    }
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getText() {
        return text;
    }
    public void setText(String text) {
        this.text = text;
    }
    public String getAuthor() {
        return author;
    }
    public void setAuthor(String author) {
        this.author = author;
    }
    public Date getCreated() {
        return created;
    }
    public void setCreated(Date created) {
        this.created = created;
    }
    }

     

  package com.joydeep.springboot; 
        import org.springframework.beans.factory.annotation.Autowired; 
        import org.springframework.web.bind.annotation.RequestMapping; 
        import org.springframework.web.bind.annotation.RestController;  

        @RestController public class HelloCntrl { 
             @Autowired Test1 test; 

             @RequestMapping("/hello") public String sayHi(){ return "Hi"; } 
         }

   

    package com.joydeep.springboot; 
         import org.springframework.boot.SpringApplication; 
         import org.springframework.boot.autoconfigure.SpringBootApplication; 

         @SpringBootApplication 
         public class CourseAPIStarter { 
              public static void main(String[] args) {
                   // TODO Auto-generated method stub                
                  SpringApplication.run(CourseAPIStarter.class); } 
         }

<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>
	<groupId>io.springboot</groupId>
	<artifactId>rest-course-api</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>Rest service course API</name>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.4.2.RELEASE</version>
	</parent>
	<properties>
		<java.version>1.8</java.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>
	

		<!-- dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> 
			</dependency -->

		<dependency>
			<groupId>org.apache.derby</groupId>
			<artifactId>derby</artifactId>
			<scope>runtime</scope>
		</dependency>
	</dependencies>
</project>

[Sibendu Dey]

Configure a class with @Repository to enable scanning of Repository classes.

@Repository(basePackages = { "Provide the package name to scan for repositories "})
public class RepositoryScanning{

}

Add the RepositoryScanning class to the RootApplicationContext

[Mayank Kumar Sharma]

@Joydeep Bhattacharjee

You are suppose to use @Repository anotation in your repository class and also use @service anotation in your service class.


You need to enable autowire in context.xml according to your configuration

   <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />

[there is no need to configure @autowire (required=true) in your class]