gbase数据、南大通用产品文档：GBase8a安装扩容节点

操作步骤
步骤1：执行安装
$ ./gcinstall.py --silent=demo.options
******************************************************************
***************
Thank you for choosing GBase product!
………………
******************************************************************
Do you accept the above licence agreement ([Y,y]/[N,n])? y
******************************************************************
Welcome to install GBase products

GBase 8a MPP Cluster 产品手册
4 管理员指南
文档版本953（2022-04-10）
南大通用数据技术股份有限公司
241
******************************************************************
Environmental Checking on gcluster nodes.
CoordinateHost:

kdb5_util [-r realm] [-d dbname] [-k mkeytype] [-kv mkeyVNO] [-M mkeyname] [-m]
[-sf stashfilename] [-P password] [-x db_args] command [command_options]

编写如下servlet，然后把项目部署到GlassFish 上。
package com.gbase.glassfish;


GBase UP 产品手册 6 应用开发指南
文档版本04（2021-04-21） 南大通用数据技术股份有限公司 1065
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;

public class TestServlet extends HttpServlet {

/**
*
*/
private static final long serialVersionUID = 1L;

/**
* The doGet method of the servlet.

*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)


throws ServletException, IOException {

Connection conn = null;
ResultSet rs = null;
Statement st = null;
try {
Context ctx = new InitialContext();
DataSource ds = (DataSource) ctx.lookup("gbase2");
conn = ds.getConnection();
st = conn.createStatement();
rs = st.executeQuery("select id,name,age,department from emp");
while(rs.next()){

GBase UP 产品手册 6 应用开发指南
文档版本04（2021-04-21） 南大通用数据技术股份有限公司 1066
System.out.println("员工id："+rs.getInt(1)+" 员工姓名："+rs.getString(2)+"
员工年龄："+rs.getInt(3)+" 员工部门："+rs.getString(4));
}
} catch (Exception e) {
e.printStackTrace();
}finally{
if(rs != null){
try {
rs.close();
rs = null;
} catch (SQLException e) {
e.printStackTrace();
}
if(st != null){
try {
st.close();
st = null;
} catch (SQLException e) {
e.printStackTrace();
}
if(conn != null){
try {







conn.close();







conn = null;
} catch (SQLException e) {







e.printStackTrace();
}
}
}
}
}
}

/**
* The doPost method of the servlet.

*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client

GBase UP 产品手册 6 应用开发指南
文档版本04（2021-04-21） 南大通用数据技术股份有限公司 1067
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)


throws ServletException, IOException {

this.doGet(request, response);
}
}
web.xml 文件如下：


xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

This is the description of my J2EE component
This is the display name of my J2EE component
TestServlet
com.gbase.glassfish.TestServlet



TestServlet
/TestServlet


index.jsp


部署成功后，启动glassfish 服务器，访问如下url：
http://localhost:8088/TestGBase/TestServlet
该测试用例会打印出数据库为test 表为emp 中的内容。

GBase UP 产品手册 6 应用开发指南
文档版本04（2021-04-21） 南大通用数据技术股份有限公司 1068