Hbase之JavaAPI連接池

源碼：

package HbaseOperation;

import com.alibaba.fastjson.JSON;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.Bytes;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;


@Service
public class HbaseOperationServiceImpl implements HbaseOperationService {

    public static final String FAMILY_NAME = "f1";
    public static final String FAMILY_NAME_F2 = "f2";

    public static final byte[] CF = Bytes.toBytes(FAMILY_NAME);

    private static Connection connection = null;

    private static volatile HbaseOperationServiceImpl instance;

    private HbaseOperationServiceImpl() {
        String ip = "192.168.184.128";
        String port = "2181";
        try {
            Configuration conf = HBaseConfiguration.create();
            conf.set("hbase.zookeeper.quorum", ip);
            conf.set("hbase.zookeeper.property.clientPort", port);
            connection = ConnectionFactory.createConnection(conf);
            System.out.println("創建connection！");
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public static HbaseOperationServiceImpl getIstance() {
        // 定義一個共有的靜態方法，返回該類型實例
        if (instance == null) {
            // 對象實例化時與否判斷（不使用同步代碼塊，instance不等於null時，直接返回對象，提高運行效率）
            synchronized (HbaseOperationServiceImpl.class) {
                // 同步代碼塊（對象未初始化時，使用同步代碼塊，保證多線程訪問時對象在第一次創建后，不再重復被創建）
                if (instance == null) {
                    // 未初始化，則初始instance變量
                    instance = new HbaseOperationServiceImpl();
                }
            }
        }
        return instance;
    }
}

　　測試代碼：

public class test_hbase_oper {
    public static void main(String args[]) {
        HbaseOperationServiceImpl hbaseOperationObj = HbaseOperationServiceImpl.getIstance();
    }