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

My project is NON WEB Spirng Boot. My elegant solution is create a daemon thread by CommandLineRunner. Then, Application do not shutdown immediately.

 @Bean
    public CommandLineRunner deQueue() {
        return args -> {
            Thread daemonThread;
            consumer.connect(3);
            daemonThread = new Thread(() -> {
                try {
                    consumer.work();
                } catch (InterruptedException e) {
                    logger.info("daemon thread is interrupted", e);
                }
            });
            daemonThread.setDaemon(true);
            daemonThread.start();
        };
    }