org.graylog2.system.shutdown

Interface GracefulShutdownHook

All Known Implementing Classes:

JobWorkerPool

public interface GracefulShutdownHook

Services can implement this to participate in a graceful shutdown of the server.

A service can register itself with the GracefulShutdownService like this:

 {@code
 class MyService implements GracefulShutdownHook {
     private final GracefulShutdownService shutdownService;

Method Summary

Modifier and Type	Method and Description
void	doGracefulShutdown() Execute shutdown tasks for the service that implements this interface.

Method Detail

doGracefulShutdown

void doGracefulShutdown()
                 throws Exception

Execute shutdown tasks for the service that implements this interface.

Warning:

• This method is called from another thread so the class that implements GracefulShutdownHook must be thread-safe.
• The server shutdown is waiting for this method call to complete. Blocking this method will block the server shutdown!

Throws:

Exception