From 866864dc5d52b8c8466b42d28148ace108d0e1f2 Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@archive.org>
Date: Tue, 17 Jul 2018 18:53:57 -0700
Subject: refactor CdxBackfillJob to be all Typed (failed tests)

---
 .../main/scala/sandcrawler/CdxBackfillJob.scala    | 67 +++++++++++++++-------
 1 file changed, 46 insertions(+), 21 deletions(-)

(limited to 'scalding')

diff --git a/scalding/src/main/scala/sandcrawler/CdxBackfillJob.scala b/scalding/src/main/scala/sandcrawler/CdxBackfillJob.scala
index 4f08665..0251e07 100644
--- a/scalding/src/main/scala/sandcrawler/CdxBackfillJob.scala
+++ b/scalding/src/main/scala/sandcrawler/CdxBackfillJob.scala
@@ -4,13 +4,24 @@ import cascading.property.AppProps
 import cascading.tuple.Fields
 import cascading.pipe.joiner._
 import com.twitter.scalding._
+import com.twitter.scalding.typed.TDsl._
 import java.util.Properties
+import cascading.tap.SinkMode
 import parallelai.spyglass.base.JobBase
-import parallelai.spyglass.hbase.{HBaseSource, HBasePipeConversions}
 import parallelai.spyglass.hbase.HBaseConstants.SourceMode
+import parallelai.spyglass.hbase.{HBaseSource, HBasePipeConversions}
 
 // Type that represents a raw parsed CDX line
-case class CdxLine(surt: String, datetime: String, url: String, mime: String, http_status: String, sha1: String, c_size: String, offset: String, warc: String)
+case class CdxLine(surt: String,
+                   datetime: String,
+                   url: String,
+                   mime: String,
+                   http_status: String,
+                   sha1: String,
+                   c_size: String,
+                   offset: String,
+                   warc: String)
+
 
 /**
  *  CDX backfill:
@@ -27,38 +38,44 @@ case class CdxLine(surt: String, datetime: String, url: String, mime: String, ht
  */
 class CdxBackfillJob(args: Args) extends JobBase(args) with HBasePipeConversions {
 
-  //import CdxLine._
-  // XXX remove all other CdxBackfillJob.whatever
   import CdxBackfillJob._
 
-  val cdxInputPath = args("cdx-input-path")
-  val hbaseTable = args("hbase-table")
-  val zookeeperHosts = args("zookeeper-hosts")
-
   val hbaseSource = getHBaseSource(args("hbase-table"), args("zookeeper-hosts"))
+  val hbaseSink = getHBaseSink(args("hbase-table"), args("zookeeper-hosts"))
 
-  val lines : TypedPipe[String] = TypedPipe.from(TextLine(cdxInputPath))
-
+  // Parse CDX lines from text file to typed pipe
+  val lines : TypedPipe[String] = TypedPipe.from(TextLine(args("cdx-input-path")))
   val cdxLines : TypedPipe[CdxLine] = lines
     .filter { isCdxLine }
     .map { lineToCdxLine }
     .filter { CdxBackfillJob.keepCdx(_) }
 
-  val cdxRows = cdxLines
-    .map { CdxBackfillJob.cdxLineToRow(_) }
-    .toPipe(('key, 'f_c, 'file_cdx, 'file_mime))
+  val cdxRows : TypedPipe[(String, String, String, String)] = cdxLines
+    .map { CdxBackfillJob.cdxLineToRow }
 
-  val hbaseKeys = hbaseSource
-    .project('key)
-    .mapTo('key -> 'existingKey) { key : String => key }
+  val existingKeys : TypedPipe[String] = hbaseSource
+    .read
+    .toTypedPipe[String]('key)
 
   // filters out all the lines that have an existing SHA1 key in HBase
-  val newRows = cdxRows
-    .joinWithLarger('key -> 'existingKey, hbaseKeys, joiner = new LeftJoin)
-    .filter('existingKey) { k : String => k == null } // is String the right type?
-
+  // the groupBy statements are to select key values to join on
+  val newRows : TypedPipe[(String, String, String, String)] = existingKeys
+    .groupBy( identity )
+    .rightJoin(cdxRows.groupBy(_._1))
+    .toTypedPipe
+    .debug
+    .collect { case (_, (None, row)) => row }
+    .debug
+
+  // convert to tuple form and write out into HBase
   newRows
-    .write(hbaseSource)
+    .toPipe('key, 'c, 'cdx, 'mime)
+    .toBytesWritable( new Fields("key", "c", "cdx", "mime") )
+    .write(hbaseSink)
+
+    // XXX:
+    //.toPipe("all")
+    //.mapTo('all -> ('key, 'c, 'cdx, 'mime)) { x : (String, String, String, String) => x }
 
 }
 
@@ -72,6 +89,14 @@ object CdxBackfillJob {
       SourceMode.SCAN_ALL)
   }
 
+  def getHBaseSink(hbase_table: String, zookeeper_hosts: String) : HBaseSource = {
+    return HBaseBuilder.buildSink(
+      hbase_table,
+      zookeeper_hosts,
+      List("f:c", "file:cdx", "file:mime"),
+      SinkMode.UPDATE)
+  }
+
   def normalizeMime(raw: String) : String = {
 
     val NORMAL_MIME = List("application/pdf",
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