org.sparklinedata.druid.client.DruidClient.scala Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.sparklinedata.druid.client
import java.io.InputStream
import com.fasterxml.jackson.jaxrs.smile.SmileMediaTypes
import org.apache.commons.io.IOUtils
import org.apache.commons.lang.exception.ExceptionUtils
import org.apache.http.HttpEntity
import org.apache.http.client.methods._
import org.apache.http.entity.{ByteArrayEntity, ContentType, StringEntity}
import org.apache.http.impl.client.{CloseableHttpClient, HttpClients}
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager
import org.apache.http.util.EntityUtils
import org.apache.spark.Logging
import org.apache.spark.sql.SQLContext
import org.apache.spark.sql.sources.druid.DruidPlanner
import org.jboss.netty.handler.codec.http.HttpHeaders
import org.joda.time.{DateTime, Interval}
import org.json4s._
import org.json4s.jackson.sparklinedata.SmileJsonMethods._
import org.sparklinedata.druid._
import org.sparklinedata.druid.metadata._
import scala.collection.mutable.{Map => MMap}
import scala.util.Try
object ConnectionManager {
val pool = {
val p = new PoolingHttpClientConnectionManager
p.setMaxTotal(40)
p.setDefaultMaxPerRoute(8)
p
}
// Todo execute this in each Executor process
// for now each Executor gets the built-in values.
def init(sqlContext : SQLContext): Unit = {
pool.setMaxTotal(DruidPlanner.getConfValue(sqlContext,
DruidPlanner.DRUID_CONN_POOL_MAX_CONNECTIONS))
pool.setDefaultMaxPerRoute(DruidPlanner.getConfValue(sqlContext,
DruidPlanner.DRUID_CONN_POOL_MAX_CONNECTIONS_PER_ROUTE))
}
}
abstract class DruidClient(val host : String,
val port : Int,
val useSmile : Boolean = false) extends Logging {
import Utils._
import org.json4s.JsonDSL._
def this(t : (String, Int)) = {
this(t._1, t._2)
}
def this(s : String) = {
this(DruidClient.hosPort(s))
}
protected def httpClient: CloseableHttpClient = {
HttpClients.custom.setConnectionManager(ConnectionManager.pool).build
}
protected def release(resp: CloseableHttpResponse) : Unit = {
Try {
if (resp != null) EntityUtils.consume(resp.getEntity)
} recover {
case ex => log.error("Error returning client to pool", ExceptionUtils.getStackTrace(ex))
}
}
protected def getRequest(url : String) = new HttpGet(url)
protected def postRequest(url : String) = new HttpPost(url)
@throws(classOf[DruidDataSourceException])
protected def perform(url : String,
reqType : String => HttpRequestBase,
payload : JValue,
reqHeaders: Map[String, String]) : JValue = {
var resp: CloseableHttpResponse = null
val js : Try[JValue] = for {
(request, r) <- Try {
val req: CloseableHttpClient = httpClient
val request: HttpRequestBase = reqType(url)
if ( payload != null && request.isInstanceOf[HttpEntityEnclosingRequestBase]) {
val input: HttpEntity = if (!useSmile) {
val s : String = compact(payload)
new StringEntity(s, ContentType.APPLICATION_JSON)
} else {
val b = mapper.writeValueAsBytes(payload)
new ByteArrayEntity(b, null)
}
request.asInstanceOf[HttpEntityEnclosingRequestBase].setEntity(input)
}
addHeaders(request, reqHeaders)
resp = req.execute(request)
(request, resp)
}
respStr <- Try {
val status = r.getStatusLine().getStatusCode();
if (status >= 200 && status < 300) {
if (r.getEntity != null ) {
if (request.isInstanceOf[HttpGet] || !useSmile) {
IOUtils.toString(r.getEntity.getContent)
} else {
r.getEntity.getContent
}
} else {
throw new DruidDataSourceException(s"Unexpected response status: ${r.getStatusLine}")
}
} else {
throw new DruidDataSourceException(s"Unexpected response status: ${r.getStatusLine}")
}
}
j <- Try {
respStr match {
case rs: InputStream => parse(rs)
case rs => parse(rs.toString)
}
}
} yield j
release(resp)
js getOrElse( js.failed.get match {
case dE : DruidDataSourceException => throw dE
case x => throw new DruidDataSourceException("Failed in communication with Druid", x)
})
}
@throws(classOf[DruidDataSourceException])
protected def performQuery(url : String,
reqType : String => HttpRequestBase,
qrySpec : QuerySpec,
payload : JValue,
reqHeaders: Map[String, String]) : CloseableIterator[QueryResultRow] = {
var resp: CloseableHttpResponse = null
val it: Try[CloseableIterator[QueryResultRow]] = for {
r <- Try {
val req: CloseableHttpClient = httpClient
val request: HttpRequestBase = reqType(url)
if (payload != null && request.isInstanceOf[HttpEntityEnclosingRequestBase]) {
val input: HttpEntity = if (!useSmile) {
val s: String = compact(payload)
new StringEntity(s, ContentType.APPLICATION_JSON)
} else {
val b = mapper.writeValueAsBytes(payload)
new ByteArrayEntity(b, null)
}
request.asInstanceOf[HttpEntityEnclosingRequestBase].setEntity(input)
}
addHeaders(request, reqHeaders)
resp = req.execute(request)
resp
}
it <- Try {
val status = r.getStatusLine().getStatusCode()
if (status >= 200 && status < 300) {
qrySpec(useSmile, r.getEntity.getContent, {
release(r)
})
} else {
throw new DruidDataSourceException(s"Unexpected response status: ${resp.getStatusLine} " +
s"on $url for query: \n $payload")
}
}
} yield it
it.getOrElse {
release(resp)
it.failed.get match {
case dE: DruidDataSourceException => throw dE
case x => throw new DruidDataSourceException("Failed in communication with Druid", x)
}
}
}
protected def post(url : String,
payload : JValue,
reqHeaders: Map[String, String] = null ) : JValue =
perform(url, postRequest _, payload, reqHeaders)
protected def postQuery(url : String,
qrySpec : QuerySpec,
payload : JValue,
reqHeaders: Map[String, String] = null ) :
CloseableIterator[QueryResultRow] =
performQuery(url, postRequest _, qrySpec, payload, reqHeaders)
protected def get(url : String,
payload : JValue = null,
reqHeaders: Map[String, String] = null) : JValue =
perform(url, getRequest _, payload, reqHeaders)
protected def addHeaders(req: HttpRequestBase, reqHeaders: Map[String, String]) {
if (useSmile) {
req.addHeader(HttpHeaders.Names.CONTENT_TYPE, SmileMediaTypes.APPLICATION_JACKSON_SMILE)
}
if (reqHeaders == null) return
for (key <- reqHeaders.keySet) {
req.setHeader(key, reqHeaders(key))
}
}
@throws(classOf[DruidDataSourceException])
def executeQuery(url : String,
qry : QuerySpec) : List[QueryResultRow] = {
val jR = render(Extraction.decompose(qry))
val jV = post(url, jR)
jV.extract[List[QueryResultRow]]
}
@throws(classOf[DruidDataSourceException])
def executeQueryAsStream(url : String,
qry : QuerySpec) : CloseableIterator[QueryResultRow] = {
val jR = render(Extraction.decompose(qry))
postQuery(url, qry, jR)
}
def timeBoundary(dataSource : String) : Interval
@throws(classOf[DruidDataSourceException])
def metadata(url : String,
dataSource : String,
segs : List[DruidSegmentInfo],
fullIndex : Boolean) : DruidDataSource = {
val in = timeBoundary(dataSource)
val ins : JValue = if ( segs != null ) {
Extraction.decompose(SegmentIntervals.segmentIntervals(segs))
} else {
val i = if (fullIndex) in.toString else in.withEnd(in.getStart.plusMillis(1)).toString
List(i)
}
val jR = render(
("queryType" -> "segmentMetadata") ~ ("dataSource" -> dataSource) ~
("intervals" -> ins) ~
("analysisTypes" -> List[String]("cardinality")) ~
("merge" -> "true")
)
val jV = post(url, jR) transformField {
case ("type", x) => ("typ", x)
}
val l = jV.extract[List[MetadataResponse]]
DruidDataSource(dataSource, l.head, List(in))
}
def serverStatus : ServerStatus = {
val url = s"http://$host:$port/status"
val jV = get(url)
jV.extract[ServerStatus]
}
}
object DruidClient {
val HOST = """([^:]*):(\d*)""".r
def hosPort(s : String) : (String, Int) = {
val HOST(h, p) = s
(h, p.toInt)
}
}
class DruidQueryServerClient(host : String, port : Int, useSmile : Boolean = false)
extends DruidClient(host, port, useSmile) with Logging {
import Utils._
import org.json4s.JsonDSL._
@transient val url = s"http://$host:$port/druid/v2/?pretty"
def this(t : (String, Int), useSmile : Boolean) = {
this(t._1, t._2, useSmile)
}
def this(s : String, useSmile : Boolean = false) = {
this(DruidClient.hosPort(s), useSmile)
}
@throws(classOf[DruidDataSourceException])
def timeBoundary(dataSource : String) : Interval = {
val jR = render(
( "queryType" -> "timeBoundary") ~ ("dataSource" -> dataSource)
)
val jV = post(url, jR)
val sTime : String = (jV \\ "minTime").extract[String]
val eTime : String = (jV \\ "maxTime").extract[String]
val endDate = DateTime.parse(eTime).plusSeconds(1)
new Interval(DateTime.parse(sTime), endDate)
}
@throws(classOf[DruidDataSourceException])
def metadata(dataSource : String, fullIndex : Boolean) : DruidDataSource = {
metadata(url, dataSource, null, fullIndex)
}
@throws(classOf[DruidDataSourceException])
def segmentInfo(dataSource : String) : List[SegmentInfo] = {
val in = timeBoundary(dataSource)
val t = render(("type" -> "none"))
val jR = render(
("queryType" -> "segmentMetadata") ~ ("dataSource" -> dataSource) ~
("intervals" -> List(in.toString)) ~
("merge" -> "false") ~
("toInclude" -> render(("type" -> "none")))
)
val jV = post(url, jR) transformField {
case ("type", x) => ("typ", x)
}
val l = jV.extract[List[MetadataResponse]]
l.map(new SegmentInfo(_))
}
@throws(classOf[DruidDataSourceException])
def executeQuery(qry : QuerySpec) : List[QueryResultRow] = {
executeQuery(url, qry)
}
@throws(classOf[DruidDataSourceException])
def executeQueryAsStream(qry : QuerySpec) : CloseableIterator[QueryResultRow] = {
executeQueryAsStream(url, qry)
}
}
class DruidCoordinatorClient(host : String, port : Int, useSmile : Boolean = false)
extends DruidClient(host, port, useSmile) with Logging {
import Utils._
@transient val urlPrefix = s"http://$host:$port/druid/coordinator/v1"
def this(t: (String, Int)) = {
this(t._1, t._2)
}
def this(s: String) = {
this(DruidClient.hosPort(s))
}
@throws(classOf[DruidDataSourceException])
def timeBoundary(dataSource : String) : Interval = {
val url = s"$urlPrefix/datasources/$dataSource"
val jV = get(url)
val i = jV.extract[CoordDataSourceInfo]
new Interval(i.segments.minTime, i.segments.maxTime)
}
@throws(classOf[DruidDataSourceException])
def metadataFromHistorical(histServer : HistoricalServerInfo,
dataSource : String,
fullIndex : Boolean) : DruidDataSource = {
val (h,p) = DruidClient.hosPort(histServer.host)
val url = s"http://$h:$p/druid/v2/?pretty"
metadata(url, dataSource, histServer.segments.values.toList, fullIndex)
}
@throws(classOf[DruidDataSourceException])
def serversInfo : List[HistoricalServerInfo] = {
val url = s"$urlPrefix/servers?full=true"
val jV = get(url)
jV.extract[List[HistoricalServerInfo]]
}
@throws(classOf[DruidDataSourceException])
def dataSourceInfo(datasource : String) : DataSourceSegmentInfo = {
val url = s"$urlPrefix/datasources/$datasource?full=true"
val jV = get(url)
jV.extract[DataSourceSegmentInfo]
}
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