How do I autowire a Spring TaskExecutor created thread?

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According to Spring's documentation the way to use the TaskExecutor is as follows:

import org.springframework.core.task.TaskExecutor;

public class TaskExecutorExample {

  private class MessagePrinterTask implements Runnable {

    private String message;

    public MessagePrinterTask(String message) {
      this.message = message;
    }

    public void run() {
      System.out.println(message);
    }

  }

  private TaskExecutor taskExecutor;

  public TaskExecutorExample(TaskExecutor taskExecutor) {
    this.taskExecutor = taskExecutor;
  }

  public void printMessages() {
    for(int i = 0; i < 25; i++) {
      taskExecutor.execute(new MessagePrinterTask("Message" + i));
    }
  }
}

However, if MessagePrinterTask has autowired dependencies they will not be configured by Spring because we are instantiating our bean outside of Spring's context (at least that's how I understand it) even though Spring will provide the actual thread creation. If MessagePrinterTask were to have autowired dependencies how do we get Spring to recognize them? I tried the following modified example to no avail (and yes, autowiring is enabled properly):

import org.springframework.core.task.TaskExecutor;

public class TaskExecutorExample {

  @Component
  private class MessagePrinterTask implements Runnable {

    @Autowired
    private autoWiredDependency;

    public void run() {
      autoWiredDependency.doNotThrowNullPointerExceptionPlease();
    }

  }

  private TaskExecutor taskExecutor;

  public TaskExecutorExample(TaskExecutor taskExecutor) {
    this.taskExecutor = taskExecutor;
  }

  public void printMessages() {
    for(int i = 0; i < 25; i++) {
      taskExecutor.execute(new MessagePrinterTask());
    }
  }
}
autowired multithreading spring java
3 Answers

Try this method. 

@Service
@Scope("prototype")
public invokeClass {

    @Autowired
    private ApplicationContext applicationContext;



    public void methodName(TestRequest input){
        TaskExecutor taskExecutor = new SimpleAsyncTaskExecutor();

        taskExecutor.execute(new Runnable() {
            public void run() {

                applicationContext.getBean("testService", TestService.class).execute(input);
            }
        });
    }
}
user_15307560
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