Stop Spring Boot on thread error

Question

I have this configuration using Spring Boot:

@Bean
public TaskExecutor a() {
  return new SimpleAsyncTaskExecutor();
}

@Bean
public CommandLineRunner b() {
  return (String... args) -> {
    RunnableTask task = SomeRunnableTask();
    a().execute(task);
  };
}

When that thread stops (for any reason) I want to shut down the Spring Boot application.

The thread is a long running process connecting to a database, webservice, socket... So it's quite likely that at some point it'll fail.

What's the right way of shutting down Spring Boot when a thread stops? Should I not be using SimpleAsyncTaskExecutor from Spring?

Thanks!

Answer 1

Spring Boot has a ShutdownEndpoint which

Allows the application to be gracefully shutdown (not enabled by default).

You have to take a look on it:

Thread thread = new Thread(new Runnable() {
    @Override
    public void run() {
        try {
            Thread.sleep(500L); // For the response to be sent back to the requester
        }
        catch (InterruptedException ex) {
            Thread.currentThread().interrupt();
        }
        ShutdownEndpoint.this.context.close();  // The ConfigurableApplicationContext 
    }
});
thread.setContextClassLoader(getClass().getClassLoader());
thread.start();