Limit Stanford NLP to a duration.

annotate_in_reasonable_time.java

  @SuppressWarnings("deprecated")
  public static boolean annotateTimed(Annotation ann) {
    // Don't time the initial classifier setup.
    nlp.get();

    Thread annotateThread = new Thread(() -> {
      nlp.get().annotate(ann);
    });
    annotateThread.start();
    // Spend at most 4 seconds annotating any document; after this it might as well be hanging!
    try {
      annotateThread.join(MaxAnnotationTime);
    } catch (InterruptedException e) {
    }
    if (!annotateThread.isAlive()) {
      // Excellent, it finished.
      return true;
    }

    // Yes, I know.
    annotateThread.stop();
    return false;
  }