foo.java

vertx.executeBlocking(fut -> {
  
  Thread worker = Thread.currentThread();
  AtomicBoolean complete = new AtomicBoolean();
  
  long id = vertx.setTimer(TIMEOUT, tid -> {
    if (!complete.get()) {
      worker.interrupt();
    }
  });
  
  try {
    
    // Execute the regex here with the special CharSequence
 
    executeRegex();
    
    complete.set(true);
    vertx.cancelTimer(id);
    fut.complete(null);
    
  } catch (RuntimeException e) {
    // it timed out
    fut.fail(e);
  } 

}, res -> {
  
  System.out.println("Timed out ? " + res.failed());
  
});