com.cloudera.spark.hbase.example.HBaseScanRDDExample.scala Maven / Gradle / Ivy

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.cloudera.spark.hbase.example

import org.apache.spark.SparkContext
import org.apache.hadoop.hbase.HBaseConfiguration
import org.apache.hadoop.fs.Path
import org.apache.hadoop.hbase.util.Bytes
import org.apache.hadoop.hbase.client.Get
import org.apache.hadoop.hbase.client.Result
import org.apache.hadoop.hbase.client.Scan
import java.util.ArrayList
import org.apache.spark.SparkConf
import com.cloudera.spark.hbase.HBaseContext


object HBaseScanRDDExample {
  def main(args: Array[String]) {
    if (args.length == 0) {
      System.out.println("GenerateGraphs {tableName}")
      return ;
    }

    val tableName = args(0);

    val sparkConf = new SparkConf().setAppName("HBaseDistributedScanExample " + tableName )
    val sc = new SparkContext(sparkConf)

    val conf = HBaseConfiguration.create()
    conf.addResource(new Path("/etc/hbase/conf/core-site.xml"))
    conf.addResource(new Path("/etc/hbase/conf/hbase-site.xml"))

    var scan = new Scan()
    scan.setCaching(100)

    val hbaseContext = new HBaseContext(sc, conf);

    var getRdd = hbaseContext.hbaseScanRDD( tableName, scan)
    println(" --- abc")
    getRdd.foreach(v => println(Bytes.toString(v._1)))
    println(" --- def")
    getRdd.collect.foreach(v => println(Bytes.toString(v._1)))
    println(" --- qwe")
    
  }
}