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HBase之表状态

import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.hbase.HBaseConfiguration;import org.apache.hadoop.hbase.HColumnDescriptor;import org.apache.hadoop.hbase.HTableDescriptor;import org.apache.hadoop.hbase.TableName;import org.apache.hadoop.hbase.client.Admin;import org.apache.hadoop.hbase.client.Connection;import org.apache.hadoop.hbase.client.ConnectionFactory;import org.apache.hadoop.hbase.util.Bytes;import java.io.IOException;/** * Hbase表状态描述 */public class VarCallsStatuInHBase {    public static void main(String args[]) throws IOException{        Configuration conf = HBaseConfiguration.create();        Connection connection = ConnectionFactory.createConnection(conf);        Admin admin = connection.getAdmin();        //表的名称        TableName tableName = TableName.valueOf("T_admin");        //获取表描述        HTableDescriptor desc = new HTableDescriptor(tableName);        //获取列族描述        HColumnDescriptor coldef = new HColumnDescriptor(Bytes.toBytes("info"));        //加入列族        desc.addFamily(coldef);        //创建表        admin.createTable(desc);        try{            //删除表 删除表前应该先disabled表            admin.deleteTable(tableName);        }catch (IOException e){            System.err.println("Error deleting table: " + e.getMessage());        }        //disable表后可用删除        admin.disableTable(tableName);        //是否disable状态        boolean isDisabled=admin.isTableDisabled(tableName);        // Table is disabled: true        System.out.println("Table is disabled: " + isDisabled);        //表是否可用        boolean avail1 = admin.isTableAvailable(tableName);        // Table available: true        System.out.println("Table available: " + avail1);        //删除表        admin.deleteTable(tableName);        //表是否可用        boolean avail2 = admin.isTableAvailable(tableName);        //Table available: false        System.out.println("Table available: " + avail2);        //再次创建        admin.createTable(desc);        boolean isEnabled = admin.isTableEnabled(tableName);        //Table is enabled: true*        System.out.println("Table is enabled: " + isEnabled);    }}/** Error deleting table: T_admin Table is disabled: true Table available: true Table available: false Table is enabled: true* */

 

HBase之表状态