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Scalding source for Elasticsearch
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| package com.twitter.scalding.sources | |
| import cascading.tuple.Fields | |
| import cascading.tap.Tap; | |
| import org.elasticsearch.hadoop.cascading.EsTap | |
| import com.twitter.scalding._ | |
| abstract class ElasticsearchSource extends Source { | |
| val resource: String | |
| val fields : Fields | |
| val query : String | |
| val host : String | |
| val port : Int | |
| val properties : Map[String,String] | |
| lazy val props = { | |
| val p = new java.util.Properties | |
| p.setProperty("es.nodes", host) | |
| if (properties.nonEmpty) { | |
| properties.foreach(kv => p.setProperty(kv._1, kv._2)) | |
| } | |
| p | |
| } | |
| override def createTap(readOrWrite : AccessMode)(implicit mode : Mode) : Tap[_,_,_] = readOrWrite match { | |
| case Read => mode match { | |
| case _ => new EsTap(host, port, resource, query, fields, props) | |
| } | |
| case Write => mode match { | |
| case _ => new EsTap(host, port, resource, query, fields, props) | |
| } | |
| } | |
| } |
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