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dnet-hadoop
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creates the crossref dataset used for doiboost together with unpacking part from tar

This commit is contained in:
Miriam Baglioni 2021-06-14 17:27:19 +02:00
parent 4da141bd7c
commit d6e21bb6ea
1 changed files with 23 additions and 6 deletions
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29
dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/crossref/GenerateCrossrefDataset.scala
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@ -1,13 +1,12 @@
package eu.dnetlib.doiboost.crossref
import eu.dnetlib.dhp.application.ArgumentApplicationParser
import eu.dnetlib.doiboost.crossref.UnpackCrossrefDumpEntries.getClass
import org.apache.hadoop.io.compress.GzipCodec
import org.apache.spark.{SparkConf, SparkContext}
import org.apache.spark.sql.{Encoder, Encoders, SaveMode, SparkSession}
import org.json4s
import org.json4s.DefaultFormats
import org.json4s.jackson.JsonMethods.parse
import org.json4s.JsonAST.JArray
import org.json4s.jackson.JsonMethods.{compact, parse, render}
import org.slf4j.{Logger, LoggerFactory}
import scala.io.Source
@ -18,6 +17,13 @@ object GenerateCrossrefDataset {
implicit val mrEncoder: Encoder[CrossrefDT] = Encoders.kryo[CrossrefDT]
def extractDump(input:String):List[String] = {
implicit lazy val formats: DefaultFormats.type = org.json4s.DefaultFormats
lazy val json: json4s.JValue = parse(input)
val a = (json \ "items").extract[JArray]
a.arr.map(s => compact(render(s)))
}
def crossrefElement(meta: String): CrossrefDT = {
@ -25,7 +31,7 @@ object GenerateCrossrefDataset {
lazy val json: json4s.JValue = parse(meta)
val doi:String = (json \ "DOI").extract[String]
val timestamp: Long = (json \ "indexed" \ "timestamp").extract[Long]
new CrossrefDT(doi, meta, timestamp)
CrossrefDT(doi, meta, timestamp)
}
@ -45,9 +51,20 @@ object GenerateCrossrefDataset {
import spark.implicits._
sc.textFile(sourcePath,6000)
def extractDump(input:String):List[String] = {
implicit lazy val formats: DefaultFormats.type = org.json4s.DefaultFormats
lazy val json: json4s.JValue = parse(input)
val a = (json \ "items").extract[JArray]
a.arr.map(s => compact(render(s)))
}
// sc.textFile(sourcePath,6000)
sc.wholeTextFiles(sourcePath,6000).flatMap(d =>extractDump(d._2))
.map(meta => crossrefElement(meta))
.toDS()
.toDS()//.as[CrossrefDT]
.write.mode(SaveMode.Overwrite).save(targetPath)
}