Scala 访问 Hbase

最新推荐文章于 2022-07-17 17:30:54 发布

sunrising_hill

最新推荐文章于 2022-07-17 17:30:54 发布

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分类专栏： HBase

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本文提供了一个使用Scala编写的HBase表截断示例，通过禁用表、清空数据并重新启用表的方式实现了数据的彻底清除。示例中详细展示了如何建立HBase连接及进行表操作。

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package hbase

import org.apache.hadoop.conf.Configuration
import org.apache.hadoop.hbase.{HBaseConfiguration, TableName}
import org.apache.hadoop.hbase.client.{Connection, ConnectionFactory}

/**
  * Created by ytc2007 on 2018/2/23.
  */
object HbaseTable {
   var tableName: String = "test"

   def main(args: Array[String]): Unit = {
      truncateUserRelationTable()
   }

   def truncateUserRelationTable() : Unit = {
      var connection = getHBaseConnection()
      var admin = connection.getAdmin
      if (admin.isTableEnabled(TableName.valueOf(tableName))) {
         admin.disableTable(TableName.valueOf(tableName))
      }
      if (admin.isTableDisabled(TableName.valueOf(tableName))) {
         admin.truncateTable(TableName.valueOf(tableName), true)
      }
      if (admin.isTableDisabled(TableName.valueOf(tableName))) {
         admin.enableTable(TableName.valueOf(tableName))
      }
      connection.close()
   }

   def getHBaseConnection() : Connection = {
      var configuration: Configuration = null
      var connection: Connection = null
      if (configuration == null) {
         configuration = HBaseConfiguration.create()
         configuration.set("hbase.zookeeper.quorum", "hm.hbase.com")
      }
      connection = ConnectionFactory.createConnection(configuration);
      connection
   }
}