@Override public List<String> getAllIndexedSpaceKeys() throws Exception { if (allIndexedSpacesKeys == null || allIndexedSpacesKeysNextRefresh < System.currentTimeMillis()) { allIndexedSpacesKeys = remoteSystemClient.getAllSpaces(); if (spaceKeysExcluded != null) { allIndexedSpacesKeys.removeAll(spaceKeysExcluded); } allIndexedSpacesKeysNextRefresh = System.currentTimeMillis() + SPACES_REFRESH_TIME; } return allIndexedSpacesKeys; }