TomP TomP - 3 years ago 178
Java Question

Spring UnsatisfiedDependencyException after project tree changed

I am new in Spring and I am trying to make simple rest application. When I had all of my files in one package, application worked fine. When I changed my project organisation, I cant build my project. I am getting this error:

2017-09-30 22:32:48.428 WARN 9428 --- [ main] o.s.w.c.s.GenericWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'application': Unsatisfied dependency expressed through field 'repository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'socketApp.dal.repository.CustomerRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2017-09-30 22:32:48.431 INFO 9428 --- [ main] utoConfigurationReportLoggingInitializer :

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-09-30 22:32:48.495 ERROR 9428 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :

***************************
APPLICATION FAILED TO START
***************************

Description:

Field repository in socketApp.main.Application required a bean of type 'socketApp.dal.repository.CustomerRepository' that could not be found.


Action:

Consider defining a bean of type 'socketApp.dal.repository.CustomerRepository' in your configuration.

2017-09-30 22:32:48.496 ERROR 9428 --- [ main] o.s.test.context.TestContextManager : Caught exception while allowing TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener@16267862] to prepare test instance [hello.GreetingControllerTests@47f08b81]


My current project tree looks like this

src
main
java
app
dal
model
-Customer.java
repository
-CustomerRepository.java
main
-Aplication.java
webServices
-GreetingController.java


Here is my Customer.java file:

package socketApp.dal.model;

import org.springframework.data.annotation.Id;


public class Customer {

@Id
public String id;

public String firstName;
public String lastName;

public Customer() {}

public Customer(String firstName, String lastName) {
this.firstName = firstName;
this.lastName = lastName;
}

@Override
public String toString() {
return String.format(
"Customer[id=%s, firstName='%s', lastName='%s']",
id, firstName, lastName);
}

}


My CustomerRepository.java file:

package socketApp.dal.repository;


import java.util.List;

import org.springframework.data.mongodb.repository.MongoRepository;
import org.springframework.stereotype.Repository;
import socketApp.dal.model.Customer;

@Repository
public interface CustomerRepository extends MongoRepository<Customer, String> {

public Customer findByFirstName(String firstName);
public List<Customer> findByLastName(String lastName);


}


My Application.java

package socketApp.main;



import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import socketApp.dal.model.Customer;
import socketApp.dal.repository.CustomerRepository;

@SpringBootApplication

public class Application implements CommandLineRunner{

@Autowired
private CustomerRepository repository;

public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}

@Override
public void run(String... args) throws Exception {

repository.deleteAll();

// save a couple of customers
repository.save(new Customer("Alice", "Smith"));
repository.save(new Customer("Bob", "Smith"));

// fetch all customers
System.out.println("Customers found with findAll():");
System.out.println("-------------------------------");
for (Customer customer : repository.findAll()) {
System.out.println(customer);
}
System.out.println();

// fetch an individual customer
System.out.println("Customer found with findByFirstName('Alice'):");
System.out.println("--------------------------------");
System.out.println(repository.findByFirstName("Alice"));

System.out.println("Customers found with findByLastName('Smith'):");
System.out.println("--------------------------------");
for (Customer customer : repository.findByLastName("Smith")) {
System.out.println(customer);
}

}
}


And finally my GreetingController.java

package socketApp.webServices;



import socketApp.dal.repository.CustomerRepository;
import java.util.List;
import java.util.concurrent.atomic.AtomicLong;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import socketApp.dal.model.Customer;
import socketApp.dal.model.Greeting;

@RestController
public class GreetingController {

@Autowired
private CustomerRepository repository;


@RequestMapping("/")
public List<Customer> getAllCustomers(){
// fetch all customers
return repository.findAll();
}
}

Answer Source

You either have to move the Application class up one package so that the class is in a package above the others or manually specify the basePackage via scanBasePackages or scanBasePackageClasses for the component scan initiated by your @SpringBootApplication.

See

for more details.

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