### Question:
Browser { public static void readAsyn(Server server, Collection<String> itemIds, ScheduledExecutorService threadPool, long heartBeat,DataCallback dataCallback) throws Throwable { Group group = server.addGroup(); Map<String, Item> items = group.addItems(itemIds.toArray(new String[0])); Runnable runnable = ()->{ try { List<DataItem> dataList = new ArrayList<>(); for(Map.Entry<String, Item> entry: items.entrySet()){ ItemState read = entry.getValue().read(false); dataList.add(JiVariantUtil.parseValue(entry.getKey(), read)); } dataCallback.process(dataList); } catch (Throwable e) { log.error("读取数据时发生异常！", e); } }; if(heartBeat <= 0L){ threadPool.submit(runnable); }else{ threadPool.scheduleAtFixedRate(runnable, 1,heartBeat, TimeUnit.MILLISECONDS); } } private  Browser(); static List<DataItem> readSync(Server server, Collection<String> itemIds); static List<DataItem> readSync(Server server); static void readAsyn(Server server, Collection<String> itemIds, ScheduledExecutorService threadPool, long heartBeat,DataCallback dataCallback); static void readAsyn(Server server, ScheduledExecutorService threadPool,long heartBeat, DataCallback dataCallback); static void readAsyn(Server server, ScheduledExecutorService threadPool, DataCallback dataCallback); static void subscibe(Server server); static Collection<String> browseItemIds(Server server); static List<ServerInfo> listServer(String host, String domain, String userName, String password); static void browserServer();  }### Answer:
@Test public void readAsyn() throws Exception { }