[FIXED] SpringBoot : Using @Autowired instance inside Runnable Run method

Issue

I am trying to use an instance of object instantiated through @Autowire inside a class with Runnable, but I am getting Null Pointer Exception

I went through href="https://stackoverflow.com/questions/38026330/autowired-not-working-inside-a-runnable">this thread but all the solution I tried and still its the same problem.

Sharing my code :

@Component
public class MyClass{

@Autowired
private ServiceA serviceA;

private String a;
private String b;

public MyClass() {
}
public MyClass(String a, String b) {
this.a = a;
this.b = b;
}
public Runnable newRunnable() {
    return new Runnable() {
        @Override
        public void run() {
           serviceA.innerMethod(a, b);  //got NPE here
        }
     };
  }
}

And I am calling this class runnable like this from other class

executor.submit(new MyClass("abc", "def").newRunnable());

So, am I doing something wrong, or is there any way where I could use the object

Solution

you are seeing NPE, coz ServiceA is not injected in to your MyClass. And that is becoz you created MyClass through new keyword i.e new MyClass("abc", "def")

Try getting MyClass also from container i.e

@Autowired MyClass myClass;

and use myClass in the executor.

executor.submit(myClass.newRunnable());

Answered By - samshers
Answer Checked By - Senaida (JavaFixing Volunteer)