CODEWITHSUNDEEP
springspring-boot
Oracle Monkey
Oracle Monkey

Reputation: 85

Bean not found error : Unsatisfied dependency expressed through field

I have the below Main App:-

Both packages are in different module and i have "com.app.api is included in the pom.xml of com.app.batch

    //commented  @SpringBootApplication(scanBasePackages={"com.app.batch", "com.app.api"})
        public class App 
        {
            public static void main( String[] args )
            {

                 SpringApplication.run(App.class, args);
            }
        }

In com.app.api i have class ApiClass

@Service
public class ApiClass {}

in `com.app.batch i have 

@Component
public class JobRunner implements CommandLineRunner {

    @Override
    public void run(String... args) throws Exception {
        // TODO Auto-generated method stub
        apiClass.getData(1111);
    }
}

When i comment @SpringBootApplication(scanBasePackages={"com.app.batch", "com.app.api"}) i get the following error

Field apiClass in com.app.batch.config.JobRunner required a bean of type 'com.com.api.ApiClass' that could not be found.

How can i resolve the issue without using scanBasePackages .I don't want to use scanBasePackages as the module can get added in future and it can get cumberson

Upvotes: 0

Views: 663

Answers (2)

vatsal gosar
vatsal gosar

Reputation: 187

What is the package of the App class?

It needs to be in the base package so that Spring Boot Application scans all the packages inside it.

@SpringBootApplication annotation enables the following annotations/features on its own:

  1. @EnableAutoConfiguration: enable Spring Boot’s auto-configuration mechanism
  2. @ComponentScan: enable @Component scan on the package where the application is located
  3. @Configuration: allow to register extra beans in the context or import additional configuration classes

For further details, you can read here

Upvotes: 0

GnanaJeyam
GnanaJeyam

Reputation: 3170

If your not interested to use 

@SpringBootApplication(scanBasePackages={"com.app.batch", "com.app.api"})

you need to change the package hierarchy so that spring scans the beans easily.

Your main SpringBootApplication class should be in com.app package and remaining classes should be in sub-packages. Like com.app.batch and com.app.api are sub-package of com.app

By using this kinda package hierarchy you no need scanBasePackages.

Upvotes: 1

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