Spring autowired object is null in postcontruct method

Question

I have a below setup

@Service
public class TestDispatcherImpl implements Dispatcher <MobilePushNotification> {

    @Autowired
    private A a;

    @Autowired
    private B b;

    @Autowired
    private C c;


    @PostConstruct
    public void initialize() {} {
     b.someMethod(); //GETTING A NULL POINTER EXCEPTION, 
                     //in fact all the beans are null

    }
}

public interface Dispatcher <T extends Notification> {

}

What is happening ?

Do you have in your applicationContext and how are A, B and C classes annotated? — kallehj, Aug 21 '14 at 11:16
yes i do, the implementations of a,b & c are annotated as @service . — user883275, Aug 21 '14 at 11:19

Jonathan · Accepted Answer · 2014-08-21T14:01:55.973

4

Try removing the extra curly-braces:

public void initialize() {} {
                         ^^
 b.someMethod(); //GETTING A NULL POINTER EXCEPTION, 
                 //in fact all the beans are null

}

I suspect the initializer block, where you call b.someMethod(), is invoked prior to Spring wiring the dependencies. Therefore b is null at this point.

edited Aug 21 '14 at 14:01

answered Aug 21 '14 at 11:18

Jonathan

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score 0 · Answer 2 · answered Apr 11 '16 at 20:37

0

try to handle it using the context:

simple to use this interface

org.springframework.beans.factory.config.BeanPostProcessor

answered Apr 11 '16 at 20:37

Tiago Medici

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Spring autowired object is null in postcontruct method

2 Answers2