1 files changed, 67 insertions, 0 deletions
diff --git a/scalding/src/main/scala/sandcrawler/MissingColumnDumpJob.scala b/scalding/src/main/scala/sandcrawler/MissingColumnDumpJob.scala
new file mode 100644
index 0000000..cc3bf23
--- /dev/null
+++ b/scalding/src/main/scala/sandcrawler/MissingColumnDumpJob.scala
@@ -0,0 +1,67 @@
+package sandcrawler
+
+import java.util.Properties
+
+import cascading.property.AppProps
+import cascading.tuple.Fields
+import com.twitter.scalding._
+import com.twitter.scalding.typed.TDsl._
+import parallelai.spyglass.base.JobBase
+import parallelai.spyglass.hbase.HBaseConstants.SourceMode
+import parallelai.spyglass.hbase.HBasePipeConversions
+import parallelai.spyglass.hbase.HBaseSource
+
+// This nasty, no-good, horrible Job outputs a list of keys ("sha1:A234...")
+// for which the given "column" does not have a value set.
+// It does this using a self-join because SpyGlass's HBase SCAN support seems
+// to be extremely limited.
+class MissingColumnDumpJob(args: Args) extends JobBase(args) with HBasePipeConversions {
+
+  val output = args("output")
+
+  val allKeys : TypedPipe[String] = MissingColumnDumpJob.getHBaseKeySource(
+    args("hbase-table"),
+    args("zookeeper-hosts"))
+    .read
+    .fromBytesWritable('key)
+    .toTypedPipe[String]('key)
+
+  val existingKeys : TypedPipe[(String,Boolean)] = MissingColumnDumpJob.getHBaseColSource(
+    args("hbase-table"),
+    args("zookeeper-hosts"),
+    args("column"))
+    .read
+    .fromBytesWritable('key)
+    .toTypedPipe[String]('key)
+    .map{ key => (key, true) }
+
+  val missingKeys : TypedPipe[String] = allKeys
+    .groupBy( identity )
+    .leftJoin(existingKeys.groupBy(_._1))
+    .toTypedPipe
+    .collect { case (key, (_, None)) => key }
+
+  missingKeys
+    .write(TypedTsv[String](output))
+
+}
+
+object MissingColumnDumpJob {
+
+  // eg, "wbgrp-journal-extract-0-qa",7 "mtrcs-zk1.us.archive.org:2181"
+  def getHBaseColSource(hbaseTable: String, zookeeperHosts: String, col: String) : HBaseSource = {
+    HBaseBuilder.build(
+      hbaseTable,
+      zookeeperHosts,
+      List(col),
+      SourceMode.SCAN_ALL)
+  }
+
+  def getHBaseKeySource(hbaseTable: String, zookeeperHosts: String) : HBaseSource = {
+    HBaseBuilder.build(
+      hbaseTable,
+      zookeeperHosts,
+      List("f:c"),
+      SourceMode.SCAN_ALL)
+  }
+}