上一章完成了c#访问hbase的sdk封装，接下来以一个具体Demo对sdk进行测试验证。场景：每5秒抓取指定股票列表的实时价格波动行情，数据下载后，一方面实时刷新UI界面，另一方面将数据放入到在内存中模拟的MQ (实际生产情况，可用kafka等集群代替）->存入HBase数据库。提供按指定时间范围股票价格数据查询。
目录：
- 示例说明
- 示例效果图
- rest server运行状态检查
- 获取股票实时数据代码
- 数据持续化至Hbase代码
- 从HBase读取数据代码
示例说明：
- 在Hbase 中创建两个表，分别为：
- StocksInfo （股票信息表，用来存储设置的股票代码、股票名称）
- StockRealInfo （股票实时行情数据，包含开盘价、当前价、最高价、最低价、五档竞买、卖单价和数量、成交单价、数量、涨跌幅等）
- 每5秒钟抓取StocksInfo表中所有股票的数据，自动更新UI，持续化到HBase；支持增加、删除要监控的股票列表。
- 提供按指定时间范围从hbase中查询历史数据
示例效果图：
- 历史数据查询：
rest server运行状态检查：
- 在 HDP2.4安装(五)：集群及组件安装 章节，Hbase 主机安装在 hdp4 192.168.2.21 上，使用xshell 工具连接到hbase master(hdp4)
- 查看8080端口是否正常，也可从 ambari UI 界面查看HBase状态，如图：
获取股票实时数据代码：
- 好多的网站提供股票实时交易数据的下载，我选择的是从 hq.sina 下载，注意抓取数据的频度不要设置的太高，否则你的IP可能会被封掉，代码如下：
View Codepublic class SnatchFormSina { #region SnatchFormSina HttpClient client; private const string dataurl = "http://hq.sinajs.cn/list={0}"; public SnatchFormSina() { this.client = new HttpClient(); } /// <summary> /// /// </summary> public static SnatchFormSina Current { get { return new SnatchFormSina(); } } #endregion #region GetCurrentInfos /// <summary> /// /// </summary> /// <param name="stockIDs"></param> /// <returns></returns> public async Task<List<StockRealInfo>> GetCurrentInfosAsync(List<string> stockIDs) { List<StockRealInfo> list = new List<StockRealInfo>(); string dataUrl = this.ParseStockIDs(stockIDs); dataUrl = dataUrl.Substring(0, dataUrl.Length - 1); string realInfo = await this.client.GetStringAsync(dataUrl); string[] infos = realInfo.Split(' '); StockRealInfo stockInfo; foreach (string info in infos) { if (string.IsNullOrEmpty(info)) continue; stockInfo = new StockRealInfo(info); stockInfo.ID = SimulatorCache.StockAccount[stockInfo.Name]; SimulatorCache.StockInfos[stockInfo.ID] = stockInfo; list.Add(stockInfo); } return list; } #endregion #region ParseStockIDs /// <summary> /// /// </summary> /// <param name="stockIDs"></param> /// <returns></returns> private string ParseStockIDs(List<string> stockIDs) { StringBuilder sb = new StringBuilder(); foreach(string id in stockIDs) { if (id.Substring(0, 2) == "60")//上海是600打头 { sb.Append(string.Format("sh{0},", id)); } else if (id.Substring(0, 2) == "51")//上海基金 { sb.Append(string.Format("sh{0},", id)); } else //if (stockIDs.Substring(0, 2) == "00")//深圳 { sb.Append(string.Format("sz{0},", id)); } } sb[sb.Length - 1].ToString().Replace(",", ""); return string.Format(dataurl, sb.ToString()); } #endregion #region ValiateStockID /// <summary> /// /// </summary> /// <param name="stockIDs"></param> /// <returns></returns> public async Task<string> ValiateStockID(string stockID) { string name = string.Empty; string dataUrl = this.ParseStockIDs(new List<string> { stockID }); dataUrl = dataUrl.Substring(0, dataUrl.Length - 1); string realInfo = await this.client.GetStringAsync(dataUrl); string[] infos = realInfo.Split(' '); StockRealInfo stockInfo; foreach (string info in infos) { if (string.IsNullOrEmpty(info)) continue; stockInfo = new StockRealInfo(info); name = stockInfo.Name; } return name; } #endregion }
数据持续化到Hbase代码示例：
- 代码中Utils.HBaseClient 是在一个工具类里面创建一个HBaseClient实例
View Code
public class StockRealWriter { #region StockRealWriter Queue<StockRealInfo> queue = new Queue<StockRealInfo>(); // use multithread write Thread writerThread; bool threadRunning = true; const string HBASESTOCKTBLNAME = "StockRealInfo"; public StockRealWriter() { // Start a thread for writting to HBase Task task = new Task(WriterThreadFunction); task.Start(); } ~StockRealWriter() { threadRunning = false; } #endregion #region WriterThreadFunction /// <summary> /// WriterThreadFunction /// </summary> public void WriterThreadFunction() { while (threadRunning) { if (queue.Count > 0) { lock (queue) { CellSet set = new CellSet(); do { StockRealInfo stock = queue.Dequeue(); this.CreateStockByRealInfos(set, stock); } while (queue.Count > 0); Utils.HBaseClient.StoreCellsAsync(HBASESTOCKTBLNAME, set); } } Thread.Sleep(5000); } } #endregion #region CreateStockByRealInfos /// <summary> /// /// </summary> /// <param name="set"></param> /// <param name="info"></param> private void CreateStockByRealInfos(CellSet set, StockRealInfo info) { string key = string.Format("{0}_{1}_{2}", info.ID, info.Date, info.Time); var row = new CellSet.Row { key = Encoding.UTF8.GetBytes(key) }; var value = new Cell { column = Encoding.UTF8.GetBytes("d:ID"), data = Encoding.UTF8.GetBytes(info.ID) }; row.values.Add(value); value = new Cell { column = Encoding.UTF8.GetBytes("d:Name"), data = Encoding.UTF8.GetBytes(info.Name) }; row.values.Add(value); //今日开盘价 value = new Cell { column = Encoding.UTF8.GetBytes("d:TodayOpen"), data = Encoding.UTF8.GetBytes(info.TodayOpen) }; row.values.Add(value); //昨日收盘价 value = new Cell { column = Encoding.UTF8.GetBytes("d:YesterdayClose"), data = Encoding.UTF8.GetBytes(info.YesterdayClose) }; row.values.Add(value); //当前价格 value = new Cell { column = Encoding.UTF8.GetBytes("d:Current"), data = Encoding.UTF8.GetBytes(info.Current) }; row.values.Add(value); //今日最高价 value = new Cell { column = Encoding.UTF8.GetBytes("d:High"), data = Encoding.UTF8.GetBytes(info.High) }; row.values.Add(value); //今日最低价 value = new Cell { column = Encoding.UTF8.GetBytes("d:Low"), data = Encoding.UTF8.GetBytes(info.Low) }; row.values.Add(value); //竟买价 买1 value = new Cell { column = Encoding.UTF8.GetBytes("d:Buy"), data = Encoding.UTF8.GetBytes(info.Buy) }; row.values.Add(value); //竟卖价 卖1 value = new Cell { column = Encoding.UTF8.GetBytes("d:Sell"), data = Encoding.UTF8.GetBytes(info.Sell) }; row.values.Add(value); // 成交数 单位股数 通常除于100成为手 value = new Cell { column = Encoding.UTF8.GetBytes("d:VolAmount"), data = Encoding.UTF8.GetBytes(info.VolAmount) }; row.values.Add(value); // 成交多少钱,单位元 value = new Cell { column = Encoding.UTF8.GetBytes("d:VolMoney"), data = Encoding.UTF8.GetBytes(info.VolMoney) }; row.values.Add(value); // 日期 value = new Cell { column = Encoding.UTF8.GetBytes("d:Date"), data = Encoding.UTF8.GetBytes(info.Date) }; row.values.Add(value); // 时间 value = new Cell { column = Encoding.UTF8.GetBytes("d:Time"), data = Encoding.UTF8.GetBytes(info.Time) }; row.values.Add(value); // 差额 value = new Cell { column = Encoding.UTF8.GetBytes("d:Diff"), data = Encoding.UTF8.GetBytes(info.Diff) }; row.values.Add(value); // 百分比 value = new Cell { column = Encoding.UTF8.GetBytes("d:DiffPrec"), data = Encoding.UTF8.GetBytes(info.DiffPrec) }; row.values.Add(value); DataRow buyInfo; for(int i=0;i<5;i++) { buyInfo = info.BuyList.Rows[i]; value = new Cell { column = Encoding.UTF8.GetBytes(string.Format("d:Price0{0}",i.ToString())), data = Encoding.UTF8.GetBytes(Convert.ToString(buyInfo["Price"])) }; row.values.Add(value); value = new Cell { column = Encoding.UTF8.GetBytes(string.Format("d:Amount0{0}", i.ToString())), data = Encoding.UTF8.GetBytes(Convert.ToString(buyInfo["Amount"])) }; row.values.Add(value); } DataRow sellInfo; for (int i = 0; i < 5; i++) { sellInfo = info.SellList.Rows[i]; value = new Cell { column = Encoding.UTF8.GetBytes(string.Format("d:Price1{0}", i.ToString())), data = Encoding.UTF8.GetBytes(Convert.ToString(sellInfo["Price"])) }; row.values.Add(value); value = new Cell { column = Encoding.UTF8.GetBytes(string.Format("d:Amount1{0}", i.ToString())), data = Encoding.UTF8.GetBytes(Convert.ToString(sellInfo["Amount"])) }; row.values.Add(value); } set.rows.Add(row); } #endregion #region WriteStock /// <summary> /// /// </summary> /// <param name="stockInfo"></param> public void WriteStock(List<StockRealInfo> stockInfos) { lock (queue) { foreach(var stockInfo in stockInfos) { queue.Enqueue(stockInfo); } } } #endregion }
从HBase读取数据代码：
- 代码中 Scanner 参数是指设置的查询范围 （设置StartRow、EndRow、Batch等参数)
View Code
public class StockRealReader { #region StockRealReader const string HBASESTOCKTBLNAME = "StockRealInfo"; public StockRealReader() { } #endregion #region QueryStockRealAsync public async Task<List<StockRealInfo>> QueryStockRealAsync(Scanner query) { List<StockRealInfo> list = new List<StockRealInfo>(); ScannerInformation info = await Utils.HBaseClient.CreateScannerAsync(HBASESTOCKTBLNAME, query); CellSet next; while ((next = await Utils.HBaseClient.ScannerGetNextAsync(info)) != null) { StockRealInfo realInfo; foreach (CellSet.Row row in next.rows) { realInfo = new StockRealInfo(); //开盘价 var temp = row.values.Find(c => Encoding.UTF8.GetString(c.column) == "d:TodayOpen"); realInfo.TodayOpen = Encoding.UTF8.GetString(temp.data); //昨日收盘价 temp = row.values.Find(c => Encoding.UTF8.GetString(c.column) == "d:YesterdayClose"); realInfo.YesterdayClose = Encoding.UTF8.GetString(temp.data); //当前价格 temp = row.values.Find(c => Encoding.UTF8.GetString(c.column) == "d:Current"); realInfo.Current = Encoding.UTF8.GetString(temp.data); //今日最高价 temp = row.values.Find(c => Encoding.UTF8.GetString(c.column) == "d:High"); realInfo.High = Encoding.UTF8.GetString(temp.data); //今日最低价 temp = row.values.Find(c => Encoding.UTF8.GetString(c.column) == "d:Low"); realInfo.Low = Encoding.UTF8.GetString(temp.data); //竟买价 买1 temp = row.values.Find(c => Encoding.UTF8.GetString(c.column) == "d:Buy"); realInfo.Buy = Encoding.UTF8.GetString(temp.data); //竟卖价 卖1 temp = row.values.Find(c => Encoding.UTF8.GetString(c.column) == "d:Sell"); realInfo.Sell = Encoding.UTF8.GetString(temp.data); //成交数 单位股数 通常除于100成为手 temp = row.values.Find(c => Encoding.UTF8.GetString(c.column) == "d:VolAmount"); realInfo.VolAmount = Encoding.UTF8.GetString(temp.data); //成交多少钱,单位元 temp = row.values.Find(c => Encoding.UTF8.GetString(c.column) == "d:VolMoney"); realInfo.VolMoney = Encoding.UTF8.GetString(temp.data); //日期 temp = row.values.Find(c => Encoding.UTF8.GetString(c.column) == "d:Date"); realInfo.Date = Encoding.UTF8.GetString(temp.data); //时间 temp = row.values.Find(c => Encoding.UTF8.GetString(c.column) == "d:Time"); realInfo.Time = Encoding.UTF8.GetString(temp.data); //差额 temp = row.values.Find(c => Encoding.UTF8.GetString(c.column) == "d:Diff"); realInfo.Diff = Encoding.UTF8.GetString(temp.data); //百分比 temp = row.values.Find(c => Encoding.UTF8.GetString(c.column) == "d:DiffPrec"); realInfo.DiffPrec = Encoding.UTF8.GetString(temp.data); list.Add(realInfo); } } return list; } #endregion }