When you run your code from main it creates both beans, thus two threads – daemon and non-daemon. As long as non-daemon thread is running, your application won’t exit. So it works. It’s different when run from JUnit. As soon as JUnit test method completes (and it completes immediately after the Spring context is up), … Read more
A. When an application begins running, there is one daemon thread, whose job is to execute main(). This is incorrect. See below. B. When an application begins running, there is one non-daemon thread, whose job is to execute main(). Correct. The JVM exits when the last non-daemon thread exits. If the main thread wasn’t non-daemon … Read more
Services on Linux are just shell scripts which start background processes. Have a look in /etc/init.d – you can open the files in a text editor. All you need is a bash script which responds to the parameters start and stop in an appropriate way (eg. start will start your service and record the process … Read more
I suspect Thrift is what you want. You’d have to write a little glue code to do PHP <-thrift-> C++ <-> C, but that would probably be more robust than rolling your own.
I found the solution, using org.springframework.boot.CommandLineRunner + Thread.currentThread().join(), e.g.: (note: code below is in Groovy, not Java) package id.ac.itb.lumen.social import org.slf4j.LoggerFactory import org.springframework.boot.CommandLineRunner import org.springframework.boot.SpringApplication import org.springframework.boot.autoconfigure.SpringBootApplication @SpringBootApplication class LumenSocialApplication implements CommandLineRunner { private static final log = LoggerFactory.getLogger(LumenSocialApplication.class) static void main(String[] args) { SpringApplication.run LumenSocialApplication, args } @Override void run(String… args) throws Exception { … Read more
You need to add your current user to the docker group as follows: sudo usermod -aG docker $(whoami) then logout & login again into the system or restart the system. test by docker version for further info how to install docker-engine follow docker documentation
According to this and that, Perl’s system() returns exit values multiplied by 256. So it’s actually exiting with 1. It seems this happens in C too.
I just wrote the following code as a test: public class DaemonThreadPlay { public static void main(String [] args) { Thread daemonThread = new Thread() { public void run() { while (true) { try { System.out.println(“Try block executed”); Thread.sleep(1000l); } catch (Throwable t) { t.printStackTrace(); } } } @Override public void finalize() { System.out.println(“Finalize method … Read more
.NET Core has considerably evolved since @Stefano’s answer a year ago. In .NET Core 2.0, you can now use the well-known AppDomain.CurrentDomain.ProcessExit event instead of AssemblyLoadContext.Default.Unloading. It works fine for console applications on Linux, also in Docker.
First off, on all modern UNIXes /var/run does not persist across reboots. The general method of handling the PID file is to create it during initialization and delete it from any exit, either normal or signal handler. There are two canonical ways to atomically create/check for the file. The main one these days is to … Read more