public class DbOpQueue {
static private final BlockingQueue<DbOpItem> queue = new LinkedBlockingQueue<>();
static private DbOpRunner runner;
synchronized static public void init() {
if (runner != null) return;
public class DbOpQueue {
static private final BlockingQueue<DbOpItem> queue = new LinkedBlockingQueue<>();
static private DbOpRunner runner;
synchronized static public void init() {
if (runner != null) return;