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ElasticSearchHelper.scala
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ElasticSearchHelper.scala
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package ru.yandex.spark
import org.elasticsearch.action.bulk.{BulkResponse, BulkRequestBuilder}
import org.elasticsearch.action.index.IndexResponse
import org.elasticsearch.common.xcontent.XContentBuilder
import org.elasticsearch.common.xcontent.XContentFactory._
import org.elasticsearch.node.NodeBuilder._
import org.elasticsearch.node._
import org.elasticsearch.client._
/**
* Created by viacheslav on 11.04.2015.
*/
object ElasticSearchHelper {
val PROTOCOL = "http:://"
val HOST = "localhost:9200"
val INDEX = "vk"
val USER = "user"
val POST = "post"
val GROUP = "group"
var node: Node = null
var client: Client = null
/**
* initialises helper. created node and gets client, which are private fields.
*/
def init(): Unit = {
node = nodeBuilder().node()
client = node.client()
}
/**
* process given user-data, and pushes User and it's childs documents to elasticsearch's index.
* should be public method.
* @param user downloaded and stored in object 'User' user data
*/
def addUser(user: User): Unit = {
println("Indexing user: " + user.id)
val userBuilder: XContentBuilder = jsonBuilder()
.startObject()
.field("id", user.id)
.field("sub_groups_count", user.groupInformation.sub_groups_count)
//.field("groups", user.groupInformation.groups) // startAraay?
.startArray("groups")
user.groupInformation.groups.foreach(g => userBuilder.value(g))
userBuilder.endArray()
.field("sub_user_count", user.sub_user_count)
.field("followers_count", user.followers_count)
.field("wall_count", user.wall_count)
.field("albums_count", user.albums_count)
//.field("friends", user.friends)
.startArray("friends")
user.friends.foreach(f => userBuilder.value(f))
userBuilder.endArray()
//.field("subscriptions", user.subscriptions)
.startArray("subscriptions")
user.subscriptions.foreach(s => userBuilder.value(s))
userBuilder.endArray()
.field("university_name", user.university_name)
.field("first_name", user.first_name)
.field("last_name", user.last_name)
.field("idLong", user.generalInformation.idLong)
.field("yearOfBirth", user.generalInformation.yearOfBirth)
.field("monthOfBirth", user.generalInformation.monthOfBirth)
.field("sex", user.generalInformation.sex)
.field("uidIsChanged", user.generalInformation.uidIsChanged)
.field("city", user.generalInformation.city)
.field("has_mobile", user.generalInformation.has_mobile)
.field("can_see_all_posts", user.generalInformation.can_see_all_posts)
.field("twitter", user.generalInformation.twitter)
.field("can_see_audio", user.generalInformation.can_see_audio)
.field("site", user.generalInformation.site)
.field("occupation", user.generalInformation.occupation)
.field("university", user.generalInformation.university)
.field("graduation_year", user.generalInformation.graduation_year)
.field("education_form", user.generalInformation.education_form)
.field("relation", user.generalInformation.relation)
.field("country", user.generalInformation.country)
.endObject()
val posts = user.wall_content
val postsStrings = posts.map(post => jsonBuilder()
.startObject()
.field("id", post.id)
.field("text", post.text)
.field("likes", post.likes)
.field("reposts", post.reposts)
.field("owner_id", post.owner_id)
.endObject()
)
val groups = user.groupInformation.groups_detail
val gropsStrings = groups.map(group => jsonBuilder()
.startObject()
.field("id", group.id)
.field("name", group.name)
.field("description", group.description)
.field("members_count", group.members_count)
.endObject()
)
//println(userBuilder.string())
indexData(List(userBuilder), USER)
indexData(postsStrings, POST, user.id)
indexData(gropsStrings, GROUP, user.id)
}
/**
* makes request and posts data to be indexed.
* should be private method.
* @param data
* @param dataType <tex>\in</tex> {USER, POST, GROUP}
*/
def indexData(data: List[XContentBuilder], dataType: String, parent: String = ""): Unit = {
if (data.size == 0) {
println("no data of type " + dataType + "will be indexed: no data provided")
return
}
if (USER.equals(dataType)) {
val response: IndexResponse = client.prepareIndex(INDEX, USER)
.setSource(data(0))
.execute()
.actionGet()
}
else {
val bulkRequest: BulkRequestBuilder = client.prepareBulk()
data.foreach(e =>
bulkRequest.add(client.prepareIndex(INDEX, dataType) // routing problem
.setSource(e).setParent(parent)
))
val bulkResponse: BulkResponse = bulkRequest.execute().actionGet()
if (bulkResponse.hasFailures) {
println("a bunch of " + dataType + " added to index. failures: " + bulkResponse.hasFailures.toString)
println(bulkResponse.buildFailureMessage())
}
}
}
}