Develop Reference

spring boot constructor parameter could not be found

I am working on spring boot app with tutorial. I did everything like guy from tutorial but still have problem with some constructor:(
The error is:
Parameter 0 of constructor in com.wewtorek.shop.controllers.AdminController required a bean of type 'com.wewtorek.shop.models.data.PageRepository' that could not be found.
Code is:
package com.wewtorek.shop.controllers;
import com.wewtorek.shop.models.data.Page;
import com.wewtorek.shop.models.data.PageRepository;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.List;
#Controller
#RequestMapping("/admin")
public class AdminController {
private PageRepository pageRepository;
public AdminController(PageRepository pageRepository) {
this.pageRepository = pageRepository;
}
#GetMapping
public String admin(Model model) {
List<Page> pages = pageRepository.findAll();
model.addAttribute("pages", pages);
return "admin";
}
}
PageRepository:
package com.wewtorek.shop.models.data;
import org.springframework.data.jpa.repository.JpaRepository;
public interface PageRepository extends JpaRepository<Page, Integer> {
}
Application:
package com.wewtorek.shop;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class ShopApplication {
public static void main(String[] args) {
SpringApplication.run(ShopApplication.class, args);
}
}

First :
#Repository is missing
#Repository
public interface PageRepository extends JpaRepository<Page, Integer> {
}
Doc : https://www.baeldung.com/spring-data-repositories
You dont have to create an constructor in controller :
It should be something like this :
public class AdminController{
#Autowired
private PageRepository pageRepository;
--- Code ---
}
#Autowired instanciate a service, you dont have to build it
BUT you have to put #Repository or #Service to use #Autowired
I take this example from my school project :
Controller
In my LoanService i call another server but u can replace it by u'r repository
Service
And last tips i promise :D, a complete NoSQL school project i did
https://github.com/juju630/ClientServeurNoSQL
( sry not native )

Without looking at your project, this is going to be hard to give a definitive solution.
What is happening is when spring tries to create the bean AdminController it can not find a unique bean as the dependency PageRepository.
A few things to look at to try to solve this
Is the bean JpaRepository<Page, Integer> annotated correctly for spring to pick it up and create an instance?
Is the bean JpaRepository<Page, Integer> being scanned by spring?
What is your package structure? this can be very important for the default scanning of spring beans.
To investigate you could add a default constructor to allow it to ignore the dependency, then debug out all beans on startup of your app using the answers
Here
I hope this helps.

Keep Getting "Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled" in Spring Boot

Whenever I start a spring boot project I keep getting this error, This question has been asked multiple times on stakeoverflow I have tried all the solutions but nothing works for me. My first questions are what is the reason for this error, and how can I fix it.
FilterApplication.java
package com.example.filter;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication()
public class FilterApplication {
public static void main(String[] args) {
SpringApplication.run(FilterApplication.class, args);
}
}
FilterConnector.java
package com.example.filter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
#RestController
public class FilterConnector {
#Autowired
private FilterService filterService;
#GetMapping("/home")
public List<Filter> home()
{
return this.filterService.getData();
}
}
FilterService.java
package com.example.filter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
#Service
public class FilterService {
#Autowired
private FilterDao filterDao;
public List<Filter> getData() {
System.out.println("----------------------HERE-------------");
return this.filterDao.findAll();
}
}
FilterDao.java
package com.example.filter;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
#Repository
public interface FilterDao extends JpaRepository<Filter, Integer> {
}

Spring framework relies on ApplicationContext to inject dependencies into the dependent object. For example your FilterDao will be inject into FilterService object.
To do this Spring will try to initialized instances of these classes at the start of the Application, but if it fails you will see this error message.
The problem with your code is related to FilterDao class, Spring can't initialize an instance of this class because it requires the Database to be configured correctly.
To fix this error:
you need to check your database connection is correct.
make sure there is a table corresponding to Filter class.
check the primary key (ID) is actually of type Integer.
If you provide full error stack I can give you a specific solution.
Note:
The issues is not related to FilterService or FilterConnector, because you are using #Autowired annotation implying the dependencies are optional and they will be injected after the bean initialization.

Spring Boot Application can not inject Bean from another module

I have the following 3 modules in my spring-boot application:
web (Entry point / Main Application class annotated with #SpringBootApplication
persistence
service
I'm now trying to inject a service in the web module which comes from the service. In the service I'm injecting the repository which comes from the persistence module. When I start the application the following error shows up:
***************************
APPLICATION FAILED TO START
***************************
Description:
Parameter 0 of constructor in com.project.service.images.ImageService required a bean of type 'com.project.persistence.repositories.ImageRepository' that could not be found.
Action:
Consider defining a bean of type 'com.project.persistence.repositories.ImageRepository' in your configuration.
ImageService class:
package com.project.service.images;
import com.project.common.entities.Image;
import com.project.persistence.repositories.ImageRepository;
import com.project.service.AbstractService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import javax.persistence.EntityNotFoundException;
import java.util.Date;
import java.util.List;
#Component
public class ImageService extends AbstractService {
private final ImageRepository imageRepository;
#Autowired
public ImageService(ImageRepository imageRepository) {
this.imageRepository = imageRepository;
}
public Image getImage(Long id) {
return imageRepository.findById(id).orElseThrow(EntityNotFoundException::new);
}
public List<Image> getAll() {
return imageRepository.findAll();
}
public List<Image> getAll(Date from) {
return imageRepository.findByDateRange(from, null);
}
public List<Image> getAll(Date from, Date to) {
return imageRepository.findByDateRange(from, to);
}
public List<Image> getAllForDay(Date day) {
return imageRepository.findAll();
}
}
ImageRepository class:
package com.project.persistence.repositories;
import com.project.common.entities.Image;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
import org.springframework.stereotype.Repository;
import java.util.Date;
import java.util.List;
#Repository
public interface ImageRepository extends JpaRepository<Image, Long> {
#Query("SELECT i FROM Image i WHERE i.created > :from AND i.created < :to")
public List<Image> findByDateRange(#Param("from") Date from, #Param("to") Date to);
}
And that's how I inject the service into my class in the web module:
#Autowired
private ImageService imageService;
So on I was searching throught the internet and saw some people with similar problems. Then I got the tip that I should add the scanBasePackages to the SpringBootApplication annotation at my application class. So I did this:
package com.project.web;
#SpringBootApplication(scanBasePackages = "com.project.service")
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
But it's still not working. If I add the specific package for scanning to the annotation com.project.service.images the injection of the ImageService works but then it can't find the ImageRepository in it.
What am I doing wrong?
I know that so many modules doesn't make sense for such a small application but I have to because it's for my apprenticeship and we need to make multiple modules.

What normally should do is to have this structure in your app
app
SpringBootApp.java
app.repositories
Repository.java
app.services
Service.java
If you are not following that package structure, then you need to have
#EnableJpaRepositories
And watch out for your entities which may have the same issue, in that case take a look at:
#EntityScan

Just try to change scanBasePackages to "com.project". Repository is in a different package.
eg:
#SpringBootApplication(scanBasePackages = "com.project")

Spring is not able to scan your repository class as it resides in different package.
As per your response in comments, your Application class in under
com.project.web
, so by default Spring will scan all classes under this packages and subpackages. So you need to put all your spring components under the same package/sub package where your application resides.

Create a config class , and define all you beans in that one location , in this case you need the bean for ImageRepository, Something like...
#Configuration
#ComponentScan
public class Config {
#Bean
public ImageRepository getImageRepository() {
// return the image repository object
}
}

I keep getting this #bean error when trying to run my spring boot app with dynamodb and graphql

This is the error which i am getting:
Description:
Field andiRepository in com.service.datafetcher.AllAndisDataFetcher required a bean of type 'com.repositories.AndiRepository' that could not be found.
The injection point has the following annotations:
- #org.springframework.beans.factory.annotation.Autowired(required=true)
Action:
Consider defining a bean of type 'com.repositories.AndiRepository' in your configuration.
This is the data fetcher file which is requiring a bean:
import com.models.Andi;
import com.repositories.AndiRepository;
import graphql.schema.DataFetcher;
import graphql.schema.DataFetchingEnvironment;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.util.List;
#Component
public class AllAndisDataFetcher implements DataFetcher<List<Andi>> {
#Autowired
AndiRepository andiRepository;
#Override
public List<Andi> get(DataFetchingEnvironment dataFetchingEnvironment) throws Exception {
return andiRepository.findAll();
}
}
this is the main method which resides in "com".
package com;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
#SpringBootApplication
#ComponentScan("com.repositories")//to scan repository files
#EntityScan("com.models")
#EnableJpaRepositories("com.repositories.AndiRepository")
public class DynamoDBApplication {
public static void main(String[] args) {
SpringApplication.run(DynamoDBApplication.class, args);
}
}
The models, repositories, service, packages are inside the main com package.
This is the repository file:
package com.repositories;
import com.andiskillsmaxmodels.Andi;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
#Repository
public interface AndiRepository extends CrudRepository<Andi, Integer> {
}
Thank you

Correct your package names. They're all over the place. You have imported classes from different packages it seems. Make sure that AndiRepository is in the com.repositories package. And Andi class in your com.models package. After correcting these mistakes do the following.
Remove #ComponentScan("com.repositories"). You don't need this, since #SpringBootApplicationautomatically does it for you.
And replace #SpringBootApplication with #SpringBootApplication(scanBasePackages = "com")

Field in required a bean of type that could not be found consider defining a bean of type in your configuration

I'm getting the following error when trying to run my app:
Field edao in com.alon.service.EmployeeServiceImpl required a bean of
type 'com.alon.repository.EmployeeRepository' that could not be found.
The injection point has the following annotations:
#org.springframework.beans.factory.annotation.Autowired(required=true)
Action:
Consider defining a bean of type
'com.alon.repository.EmployeeRepository' in your configuration.
Project structure:
EmployeeRepository:
package com.alon.repository;
import com.alon.model.Employee;
import org.springframework.stereotype.Repository;
import java.util.List;
#Repository
public interface EmployeeRepository {
List<Employee> findByDesignation(String designation);
void saveAll(List<Employee> employees);
Iterable<Employee> findAll();
}
EmployeeServiceImpl:
package com.alon.service;
import com.alon.model.Employee;
import com.alon.repository.EmployeeRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
#Service
public class EmployeeServiceImpl implements EmployeeService {
#Autowired
private EmployeeRepository edao;
#Override
public void saveEmployee(List<Employee> employees) {
edao.saveAll(employees);
}
#Override
public Iterable<Employee> findAllEmployees() {
return edao.findAll();
}
#Override
public List<Employee> findByDesignation(String designation) {
return edao.findByDesignation(designation);
}
}
MyApplication:
package com.alon;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class MyApplicataion {
public static void main(String[] args) {
SpringApplication.run(MyApplicataion.class, args);
}
}

As you have added spring-boot tag I guess you are using sprig data jpa. Your repository interfaces should extend org.springframework.data.repository.Repository (a marker interface) or one of its sub interfaces (usually org.springframework.data.repository.CrudRepository) for instructing spring to provide a runtime implementation of your repository, if any of those interfaces are not extened you'll get
bean of type 'com.alon.repository.EmployeeRepository' that could not
be found.

I assume you try to use spring data JPA. What you can check / debug is:
Is JpaRepositoriesAutoConfiguration executed? You can see this in the start up log in the debug log level
Does something change if you addionally add #EnableJpaRepositories with the corresponding basepackages.
Add #ComponentScan with the corresponding packages, normally #SpringBootApplication should do it, but just in case.
you can also check the autconfig documentation: https://docs.spring.io/spring-boot/docs/current/reference/html/using-boot-auto-configuration.html
EDIT: see comment from #ali4j: I did not see that it is the generic spring Repository interface and not the spring data interface
regards,WiPu