rainsunny

ESRunner runner = new ESRunner();

// Gracefully shutdown
final Thread mainThread = Thread.currentThread();

Runtime.getRuntime().addShutdownHook(new Thread(() -> {
    try {
        runner.shutdown();  // Clean up work
        mainThread.join(200);  // wait main thread to stop

rainsunny

#####  get current directory in absolute path

# Add `> /dev/null 2>&1` to eliminate outputs of `cd` in some cases

base_dir="$( cd "$(dirname $0)" > /dev/null 2>&1 && pwd)"

# other options

current_dir=$(pwd)   # current working directory
base_dir=$(dirname $0)   # in relative path