本地调试hbase

需求说明

如果要本地调试Hbase程序，那么可以用本地连接集群的方式

配置文件

在maven里，配置文件cluster.properties放在target/classes里
cluster.properties的内容如下：
hbase.address=hadoop1,hadoop2,....

读取配置文件代码:

import java.io.IOException;
import java.util.Properties;

public class ClusterConfigUtil {
   
   private static Properties prop = null;
   
   static{
      prop = new Properties();
      try {
         prop.load(ClusterConfigUtil.class.getResourceAsStream("/cluster.properties"));
      } catch (IOException e) {
         e.printStackTrace();
         throw new RuntimeException();
      }
   }

   public static String getValue(String name){
      
      String value = prop.getProperty(name);
      
      return value;
   }
}

创建hbase配置信息：

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.HConnection;
import org.apache.hadoop.hbase.client.HConnectionManager;

import java.io.IOException;

public class HBaseUtil {

   private static HConnection hconn = null;
   
   public static HConnection getConnection() throws IOException{
      
      if(hconn == null || hconn.isClosed()){
         Configuration conf = HBaseConfiguration.create();// 创建配置信息
         conf.set("hbase.zookeeper.quorum", ClusterConfigUtil.getValue("hbase.address"));// zookeeper的ip
         conf.set("hbase.zookeeper.property.clientPort", "2181");// zookeeper的端口
         hconn = HConnectionManager.createConnection(conf);
      }
      
      return hconn;
   }
}

用如下方式调用：

HConnection connection = HBaseUtil.getConnection();
Configuration conf = connection.getConfiguration();