Method addShutdownHook

core/src/main/java/io/questdb/ServerMain.java:275–293

()

    }

    private void addShutdownHook() {
        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
            try {
                System.err.println("SIGTERM received");
                System.out.println("SIGTERM received");
                // It's fine if the magic number doesn't get its way to logs.
                // We log it merely to make sure that LOAD instructions generated by
                // AsyncFilterAtom#preTouchColumns() aren't optimized away by JVM's JIT compiler.
                bootstrap.getLog().debug().$("Pre-touch magic number: ").$(AsyncFilterAtom.PRE_TOUCH_BLACK_HOLE.sum()).$();
                close();
                LogFactory.closeInstance();
            } catch (Error ignore) {
                // ignore
            } finally {
                System.err.println("QuestDB is shutdown.");
                System.out.println("QuestDB is shutdown.");
            }
        }));
    }

    private synchronized void initialize(Log log) {
        initialized = true;