【ODPS】本地数据库数据批量上传到ODPS中

利用阿里云ODPS可以批量将数据库中数据上传到ODPS的数据表中，然后进行大数据处理。

本次实例使用的是mysql数据库。

1、表说明

mysql表结构：

odps中数据表结构：

2、MySql数据库连接

package datatrans;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

public class CrateStatement {

	private static String driver = "com.mysql.jdbc.Driver"; // 驱动
	private static String url = "jdbc:mysql://ip/aliyun_odps_sql"; // 数据库连接地址
	private static String user = "***"; // 数据库账户
	private static String password = "******"; // 数据库密码

	public static Statement createStatement() throws SQLException,
			ClassNotFoundException {
		Class.forName(driver);
		Connection conn = null;
		try {

			conn = (Connection) DriverManager
					.getConnection(url, user, password);

			if (conn != null) {
				System.out.println("数据库连接成功！");
			} else {
				System.out.println("数据库连接失败！");
			}

		} catch (SQLException e) {
			e.printStackTrace();
		}

		Statement st = (Statement) conn.createStatement();
		return st;
	}

}

3、多线程上传到ODPS数据表

package datatrans;

import com.aliyun.odps.Column;
import com.aliyun.odps.TableSchema;
import com.aliyun.odps.data.Record;
import com.aliyun.odps.data.RecordWriter;

import java.io.IOException;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.concurrent.Callable;

/**
 * Created by Administrator on 2015/8/13.
 */
public class UploadDataThread implements Callable {
	private long id;
	private RecordWriter recordWriter;
	private Record record;
	private TableSchema tableSchema;
	private String sql = "";

	public UploadDataThread(long id, int threadCount,
			RecordWriter recordWriter, Record record, TableSchema tableSchema,
			String sql) {
		this.id = id;
		this.recordWriter = recordWriter;
		this.record = record;
		this.tableSchema = tableSchema;
		this.sql = sql;
	}

	@Override
	public Boolean call() throws Exception {
		
		System.out.println("Thread " +id+ "  SQL:"+sql);

		Statement stmt = CrateStatement.createStatement();
		ResultSet rset = null;
		rset = stmt.executeQuery(sql);//查询数据
		
		while (rset.next()) {
			for (int i = 0; i < tableSchema.getColumns().size(); i++) {
				Column column = tableSchema.getColumn(i);
				switch (column.getType()) {
				case BIGINT:
					record.setBigint(i, rset.getLong(column.getName()));
					break;
				case BOOLEAN:
					record.setBoolean(i, rset.getBoolean(column.getName()));
					break;
				case DATETIME:
					record.setDatetime(i, rset.getDate(column.getName()));
					break;
				case DOUBLE:
					record.setDouble(i, rset.getDouble(column.getName()));
					break;
				case STRING:
					record.setString(i, rset.getString(column.getName()));
					break;
				default:
					throw new RuntimeException("Unknown column type: "
							+ column.getType());
				}
			}
			try {
                recordWriter.write(record);
            } catch (IOException e) {
                recordWriter.close();
                e.printStackTrace();
                return false;
            }
		}
		recordWriter.close();
		return true;
	}
}

4、测试类

package datatrans;

import java.io.IOException;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import com.aliyun.odps.Odps;
import com.aliyun.odps.account.Account;
import com.aliyun.odps.account.AliyunAccount;
import com.aliyun.odps.data.Record;
import com.aliyun.odps.data.RecordWriter;
import com.aliyun.odps.tunnel.TableTunnel;
import com.aliyun.odps.tunnel.TunnelException;

public class DataTranslationDemo {

	private static final String ACCESS_ID = "";
	private static final String ACCESS_KEY = "";
	private static final String PROJECT_NAME = "";
	private static final String ODPS_URL = "";
	private static final String TUNNEL_URL = "";

	public static void main(String[] args) throws TunnelException, IOException, InterruptedException, SQLException, ClassNotFoundException {
		String tableName = "users";
		String selectSql="select * from users";
		Account account = new AliyunAccount(ACCESS_ID, ACCESS_KEY);
		Odps odps = new Odps(account);
		odps.setDefaultProject(PROJECT_NAME);// 指定默认使用的Project名称
		odps.setEndpoint(ODPS_URL);// 设置ODPS服务的地址

		TableTunnel tunnel = new TableTunnel(odps);
		tunnel.setEndpoint(TUNNEL_URL);// 设置TunnelServer地址,没有设置TunnelServer地址的情况下自动选择
		TableTunnel.UploadSession uploadSession = tunnel.createUploadSession(
				PROJECT_NAME, tableName);
		
		Statement stmt = CrateStatement.createStatement();
		ResultSet rset = stmt.executeQuery("SELECT count(1) datanum from users");
		int totalNum = 0;
		while (rset.next()) {
			/*先计算出表中数据总数*/
			totalNum=(int) rset.getLong(1);
		}
		System.out.println("表中数据总数:"+totalNum);
		/*定义线程数*/
		int threadNum = 10;
		/*计算每个线程需要处理的数据量*/
		int n = (int) Math.ceil(totalNum/threadNum); 
		
		long startTime = System.currentTimeMillis();
		System.out.println("正在上传数据.............");
		ExecutorService pool = Executors.newFixedThreadPool(threadNum);
		ArrayList> callers = new ArrayList>();
		for (int i = 0; i < threadNum; i++) {
			/*根据单线程处理数量精确查询SQL*/
			String sql = selectSql + " limit " +(i*n)+" , "+((i+1)*n-1);
            RecordWriter recordWriter = uploadSession.openRecordWriter(i);
            Record record = uploadSession.newRecord();
            /*上传数据*/
            callers.add(new UploadDataThread(i,threadNum, recordWriter, record,
                    uploadSession.getSchema(),sql));
        }
		pool.invokeAll(callers);
        pool.shutdown();
        Long[] blockList = new Long[threadNum];
        for (int i = 0; i < threadNum; i++)
            blockList[i] = Long.valueOf(i);
        uploadSession.commit(blockList);//提交
        long endTime = System.currentTimeMillis();
        System.out.println("总共耗时：" + (endTime - startTime) + " ms");
		System.out.println("-------------------------------------------------");
        System.out.println("upload success!");

	}

}