How to prevent Spring Boot daemon/server application from closing/shutting down immediately?

Question

My Spring Boot application is not a web server, but it\'s a server using custom protocol (using Camel in this case).

But Spring Boot immediately stops (gracefully) a

Answer 1

An example implementation using a CountDownLatch:

@Bean
public CountDownLatch closeLatch() {
    return new CountDownLatch(1);
}

public static void main(String... args) throws InterruptedException {
    ApplicationContext ctx = SpringApplication.run(MyApp.class, args);  

    final CountDownLatch closeLatch = ctx.getBean(CountDownLatch.class);
    Runtime.getRuntime().addShutdownHook(new Thread() {
        @Override
        public void run() {
            closeLatch.countDown();
        }
    });
    closeLatch.await();
}

Now to stop your application, you can look up the process ID and issue a kill command from the console:

kill