CODEWITHSUNDEEP
javamultithreadingspring-mvcdependency-injectionautowired
suhas_n
suhas_n

Reputation: 147

how to start a thread in Spring bean

I want to run a thread in spring application 

    @Component
    public class MyServiceCreationListener {


        public void startThread() {

            Thread t = new Thread(new MyThread());
            t.start();

        }
    }

Here i used Thread t = new Thread(new MyThread()); This is wrong way.

Please provide solution for this to spring manage MyThread like a spring bean so we can autowire it into other beans and by calling start() method we can access it

Here is Thread class

@Component
public class MyThread implements Runnable {

    public void run() {

        System.out.println("Inside run()");

    }

}

Upvotes: 3

Views: 11559

Answers (1)

alfcope
alfcope

Reputation: 2427

By default, spring beans are singleton, but Thread's run method will only run once. After that it is considered in a state different to RUNNABLE.

LifeCycle of Thread in Java

So, you need to create a new object every time and you can do that using prototype scope and ObjectFactory.

Extending Thread:

@Bean
@Scope("prototype")
public class MyThread implements Runnable {

    public void run() {

        System.out.println("Inside run()");

    }
}

And then:

@Component
public class MyServiceCreationListener {

    @Autowired
    ObjectFactory<MyThread> myThreadFactory;

    public void startThread() {
        myThreadFactory.getObject().start();
    }
}

This code has not been tested, it just for you to get an idea.

You can find some examples here: Spring and java threads

Upvotes: 5

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