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package sandcrawler
import java.util.Properties
import cascading.property.AppProps
import cascading.tuple.Fields
import com.twitter.scalding._
import org.apache.hadoop.hbase.util.Bytes
import org.apache.hadoop.hbase.client.Scan
import org.apache.hadoop.hbase.filter.SingleColumnValueFilter
import org.apache.hadoop.hbase.filter.CompareFilter
import parallelai.spyglass.base.JobBase
import parallelai.spyglass.hbase.HBaseConstants.SourceMode
import parallelai.spyglass.hbase.HBasePipeConversions
import parallelai.spyglass.hbase.HBaseRawSource
import parallelai.spyglass.hbase.HBaseSource
class MissingColumnDumpJob(args: Args) extends JobBase(args) with HBasePipeConversions {
val output = args("output")
MissingColumnDumpJob.getHBaseSource(
args("hbase-table"),
args("zookeeper-hosts"),
args("column"))
.read
.fromBytesWritable('key)
.write(Tsv(output))
}
object MissingColumnDumpJob {
// eg, "wbgrp-journal-extract-0-qa",7 "mtrcs-zk1.us.archive.org:2181"
def getHBaseSource(hbaseTable: String, zookeeperHosts: String, col: String) : HBaseSource = {
val colFamily = col.split(":")(0)
val colColumn = col.split(":")(1)
val scan = new Scan
val filter = new SingleColumnValueFilter(
Bytes.toBytes(colFamily),
Bytes.toBytes(colColumn),
CompareFilter.CompareOp.EQUAL,
Bytes.toBytes("")
)
filter.setFilterIfMissing(false)
scan.setFilter(filter)
val scanner = HBaseRawSource.convertScanToString(scan)
val (families, fields) = HBaseBuilder.parseColSpecs(List("f:c", col))
new HBaseRawSource(
hbaseTable,
zookeeperHosts,
new Fields("key"),
families,
fields,
SourceMode.SCAN_ALL,
base64Scan = scanner)
}
}
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