GroupFatcatWorksSubsetJob

This is a hack-y variant of GroupFatcatWorksSubsetJob which allows
setting different left and right sides of the join. The initial
application is to re-run work merging with only longtail-oa works on the
"left", with the goal of hard-merging these releases into existing
releases with actual identifiers (instead of just grouping into works).

As a refactor, the normal GroupFatcatWorksJob could just be this with
the same file passed as both left and right, though that requires twice
as much JSON parsing/filtering.

2 files changed, 67 insertions, 0 deletions

diff --git a/scalding/src/main/scala/sandcrawler/FatcatScorable.scala b/scalding/src/main/scala/sandcrawler/FatcatScorable.scala
index cffc2c0..2090e84 100644
--- a/scalding/src/main/scala/sandcrawler/FatcatScorable.scala
+++ b/scalding/src/main/scala/sandcrawler/FatcatScorable.scala
@@ -11,6 +11,21 @@ import com.twitter.scalding._
 import com.twitter.scalding.typed.TDsl._
 import parallelai.spyglass.hbase.HBasePipeConversions
 
+
+class FatcatScorableRight extends Scorable {
+
+  def getSource(args : Args) : Source = {
+    TextLine(args("fatcat-release-input-right"))
+  }
+
+  def getFeaturesPipe(args : Args)(implicit mode : Mode, flowDef : FlowDef) : TypedPipe[Option[MapFeatures]] = {
+    getSource(args).read
+      .toTypedPipe[String](new Fields("line"))
+      .filter { FatcatScorable.keepRecord(_) }
+      .map { FatcatScorable.jsonToMapFeatures(_) }
+  }
+}
+
 class FatcatScorable extends Scorable with HBasePipeConversions {
 
   def getSource(args : Args) : Source = {
diff --git a/scalding/src/main/scala/sandcrawler/GroupFatcatWorksSubsetJob.scala b/scalding/src/main/scala/sandcrawler/GroupFatcatWorksSubsetJob.scala
new file mode 100644
index 0000000..ea5e26b
--- /dev/null
+++ b/scalding/src/main/scala/sandcrawler/GroupFatcatWorksSubsetJob.scala
@@ -0,0 +1,52 @@
+package sandcrawler
+
+import cascading.pipe.Pipe
+import com.twitter.scalding.Args
+import com.twitter.scalding.Stat
+import com.twitter.scalding.TypedPipe
+import com.twitter.scalding.TypedTsv
+import parallelai.spyglass.base.JobBase
+
+class GroupFatcatWorksSubsetJob(args: Args) extends JobBase(args) {
+
+  val fatcatLhsRowCount = Stat("fatcat-rows-filtered-left", "sandcrawler")
+  val fatcatRhsRowCount = Stat("fatcat-rows-filtered-right", "sandcrawler")
+  val joinedRowCount = Stat("joined-rows", "sandcrawler")
+
+  val fatcatScorableLhs : Scorable = new FatcatScorable()
+  val fatcatPipeLhs : TypedPipe[(String, ReduceFeatures)] = fatcatScorableLhs
+    .getInputPipe(args)
+    .map { r =>
+      fatcatLhsRowCount.inc
+      r
+    }
+
+  val fatcatScorableRhs : Scorable = new FatcatScorableRight()
+  val fatcatPipeRhs : TypedPipe[(String, ReduceFeatures)] = fatcatScorableRhs
+    .getInputPipe(args)
+    .map { r =>
+      fatcatRhsRowCount.inc
+      r
+    }
+
+  val joinedPipe = fatcatPipeLhs
+    .addTrap(TypedTsv(args("output") + ".trapped"))
+    .join(fatcatPipeRhs)
+
+  // TypedTsv doesn't work over case classes.
+  joinedPipe
+    // filter out trivial self-matches (releases are identical)
+    .filter { case (slug, (fatcatFeaturesLeft, fatcatFeaturesRight)) =>
+      Scorable.selfMatchable(fatcatFeaturesLeft, fatcatFeaturesRight)
+    }
+    .map { case (slug, (fatcatFeaturesLeft, fatcatFeaturesRight)) =>
+      joinedRowCount.inc
+      new ReduceOutput(
+        slug,
+        Scorable.computeSimilarity(fatcatFeaturesLeft, fatcatFeaturesRight),
+        fatcatFeaturesLeft.json,
+        fatcatFeaturesRight.json)
+    }
+    .map { entry => (entry.slug, entry.score, entry.json1, entry.json2) }
+    .write(TypedTsv[(String, Int, String, String)](args("output")))
+}