Dependenc Injection inside external Jar

Question

I have a problem with Dependency Injection inside an external Jar. The result always is null. I am using spring framework and java8.

My main has the following code:

package com.a.1

@SpringBootApplication
@ComponentScan(basePackages = {"com.b.2"})
@Configuration
public class Main{  ... }

I have a test that call to the library

package com.a.1.test

public class test {

RequestMethod requestMethod = new RequestMethod();
requestMethod.method();

This RequestMethod is in a library (other Jar):

package com.b.2

public class RequestMethod {

@Autowired
private Headers header;

    public String method(){
    ...
    }  
}

The class Headers has the annotation @Service. An always the result is null.

package com.b.2

@Service
public class Headers{
...
}

The problem is that Headers is not being injected in RequestMethod. Could someone explain me how I have to prepare the Spring project to inject this dependecy?

Thank you very much in advanced

Doing `RequestMethod requestMethod = new RequestMethod();` bypasses Spring. Regardless of the amount of annotations you put on it. — M. Deinum, Feb 21 '18 at 14:44
Yes, That was the reason, now I have to refactor this RequestMethod. Thank you other time. — Ignacio Yuste Lopez, Feb 21 '18 at 18:55

score 1 · Answer 1 · edited Feb 21 '18 at 13:30

RequestMethod sould have a @Service-Annotation.

 package com.b.2

 @Service
 public class RequestMethod {

 @Autowired
 private Headers header;

   public String method(){
    ...
   }  
 }

In the Test-Class RequestMethod sould be Autowired.

package com.a.1.test

public class test {

@Autowired
RequestMethod requestMethod;

Your Test should be a Spring-Test

package com.a.1.test

@SpringBootTest
public class test {

@Autowired
RequestMethod requestMethod;

   @Test
    public void test(){
     requestMethod.method();
   }

}

Dependenc Injection inside external Jar

1 Answers1