public class Hello extends HttpServlet {

	private static final long serialVersionUID = -7640993703289314548L;

	private HTablePool htablePool;

	@Override
	public void init(){
		Configuration config =  HBaseConfiguration.create();
		config.set("hbase.zookeeper.quorum", "img648:2181");
		config.set("hbase.zookeeper.property.clientPort", "2181");
		htablePool = new HTablePool(config, 10);
	}

	@Override
	public void destroy(){
		htablePool.closeTablePool("service_user_data_idx_name");
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws IOException, ServletException {

		response.setContentType("application/json");
		PrintWriter writer = response.getWriter();

		String prefix = request.getParameter("prefix");

		HTableInterface table = htablePool.getTable("service_user_data_idx_name");
//		HTable table = new HTable(config, "service_user_data_idx_name");
		Scan s = new Scan();
		s.addFamily(Bytes.toBytes("att"));
		s.setStartRow(Bytes.toBytes(prefix));
		Filter rowFilter = new RowFilter(CompareFilter.CompareOp.EQUAL, new BinaryPrefixComparator(Bytes.toBytes(prefix)));
//		Filter pageFilter = new PageFilter(10);
//		List<Filter>  filters = Arrays.asList(rowFilter, pageFilter);
//		FilterList filterList = new FilterList(Operator.MUST_PASS_ALL, filters);
//		s.setFilter(filterList);
		s.setFilter(rowFilter);
		ResultScanner scanner = table.getScanner(s);
		Result r;
		String name,location;
		int i=0;
		List<Person> persons = new ArrayList<Person>();
		try{
			while((r=scanner.next())!=null && ++i<10){
				name = Bytes.toString(r.getRow());
				location = Bytes.toString(r.getValue(Bytes.toBytes("att"), Bytes.toBytes("location")));
				persons.add(new Person(name,location));
			}
		}finally{
			if(scanner!=null)
				scanner.close();
			if(table!=null)
				htablePool.putTable(table);
//				table.close();
		}

		for(i=0; i<10; i++)
			persons.add(new Person("name"+i,"location"+i));
		Gson gson = new Gson();
		String json = gson.toJson(persons);
		writer.println(json);
	}
}