Hbase之JavaAPI连接池

源码：

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("创建connection！");
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public static HbaseOperationServiceImpl getIstance() {
        // 定义一个共有的静态方法，返回该类型实例
        if (instance == null) {
            // 对象实例化时与否判断（不使用同步代码块，instance不等于null时，直接返回对象，提高运行效率）
            synchronized (HbaseOperationServiceImpl.class) {
                // 同步代码块（对象未初始化时，使用同步代码块，保证多线程访问时对象在第一次创建后，不再重复被创建）
                if (instance == null) {
                    // 未初始化，则初始instance变量
                    instance = new HbaseOperationServiceImpl();
                }
            }
        }
        return instance;
    }
}

　　测试代码：

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