DefaultMetaChangeManager implements MetaChangeManager { @Override public void ignore(String dcId) { if(!dcMetaChangeManagers.containsKey(dcId)) { logger.warn("[ignore] not found dcId: {}", dcId); return; } try { dcMetaChangeManagers.get(dcId).stop(); } catch (Exception e) { logger.error("[ignore]", e); } }  @Override void start(); @Override void stop(); @Override DcMetaChangeManager getOrCreate(String dcId); @Override void ignore(String dcId); @Override void startIfPossible(String dcId);  }
@Test public void testIgnore() { metaChangeManager.ignore("NULL"); }