try {
engine.bmk(TestableCallback.noop(), "base", components);
Thread.sleep(100);
engine.vmk(TestableCallback.noop(), "base", "article");
Thread.sleep(100);
engine.rmk(TestableCallback.noop(), "article", "article", "jensenshannon");
Thread.sleep(100);
VectorSetListener listener = new TestMemListener();
engine.listen("article", listener);
} catch (InterruptedException e) {