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SolrRequestHelpers.scala
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SolrRequestHelpers.scala
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package com.whitepages.cloudmanager.client
import java.util.Date
import com.whitepages.cloudmanager.ManagerSupport
import org.apache.solr.client.solrj.SolrClient
import org.apache.solr.client.solrj.impl.{HttpSolrClient, CloudSolrClient}
import org.apache.solr.client.solrj.request.QueryRequest
import org.apache.solr.common.params.CollectionParams.CollectionAction
import org.apache.solr.common.params.ModifiableSolrParams
import scala.concurrent.duration._
import scala.annotation.tailrec
import scala.util.{Random, Failure, Success, Try}
object SolrRequestHelpers extends ManagerSupport {
val asyncPause = 10 seconds
def getSolrResponse(client: SolrClient, params: ModifiableSolrParams, path: String = "/admin/collections") = {
val req = new QueryRequest(params)
req.setPath(path)
comment.debug(s"REQUEST: ${req.getPath} ${req.getParams}")
val response = Try(client.request(req)).map(GenericSolrResponse)
response match {
case Success(r) =>
comment.debug(s"RESPONSE: $r")
case Failure(e) =>
comment.debug(s"RESPONSE (exception): $e")
}
response
}
def submitRequest(client: SolrClient, params: ModifiableSolrParams, path: String = "/admin/collections"): Boolean = {
val response = getSolrResponse(client, params, path)
response match {
case Success(r) =>
checkStatus(r)
case Failure(e) =>
comment.warn(s"Request failed: $e")
false
}
}
def checkStatus(rsp: SolrResponseHelper) = {
rsp.status == "0" && rsp.walk("failure") == None
}
private val waitingStates = Set[Option[String]]( Some("submitted"), Some("running") )
def checkAsyncJobStatus(rsp: SolrResponseHelper) = {
!waitingStates.contains(rsp.walk("status", "state"))
}
def submitAsyncRequest(client: CloudSolrClient, params: ModifiableSolrParams): Boolean = {
val requestId = Random.nextInt(100000000).toString
params.set("async", requestId)
val response = getSolrResponse(client, params)
val success = response match {
case Success(r) => checkStatus(r)
case Failure(e) => comment.warn(s"Request failed: $e"); false
}
if (success) {
monitorAsyncRequest(client, requestId)
} else false
}
@tailrec
def monitorAsyncRequest(client: CloudSolrClient, requestId: String): Boolean = {
val checkParams = new ModifiableSolrParams
checkParams.set("action", CollectionAction.REQUESTSTATUS.toString)
checkParams.set("requestid", requestId)
val checkResponse = getSolrResponse(client, checkParams)
checkResponse match {
case Success(r) if checkStatus(r) => {
comment.debug(s"RESPONSE: $r")
if (checkAsyncJobStatus(r)) {
true
}
else {
comment.info(s"Waiting for async request $requestId")
delay(asyncPause)
monitorAsyncRequest(client, requestId)
}
}
case Success(r) if !checkStatus(r) => {
comment.warn(s"Unexpected response checking async request $requestId: $r")
false
}
case Failure(e) => {
comment.warn(s"Error checking async job status. ID $requestId, $e")
false
}
}
}
}
object ReplicationHandlerHelpers extends ManagerSupport {
private val detailsReq = new ModifiableSolrParams
detailsReq.set("command", "details")
private val restoreStatusReq = new ModifiableSolrParams
restoreStatusReq.set("command", "restorestatus")
def getReplicationDetails(client: SolrClient, core: String): Try[ReplicationStateResponse] = {
val checkResponse = SolrRequestHelpers.getSolrResponse(client, detailsReq, s"/$core/replication")
checkResponse.map(r => ReplicationStateResponse(r.rsp))
}
def getRestoreStatus(client: SolrClient, core: String): Try[RestoreStateResponse] = {
val restoreResponse = SolrRequestHelpers.getSolrResponse(client, restoreStatusReq, s"/$core/replication")
restoreResponse.map(r => RestoreStateResponse(r.rsp))
}
def checkFetchIndexResponse(rsp: SolrResponseHelper): Boolean = {
rsp.status == "0" && rsp.walk("status") == Some("OK")
}
def checkStatusResponse(rsp: SolrResponseHelper): Boolean = {
rsp.status == "0"
}
def checkRemainingReplicationTime(rsp: ReplicationStateResponse): Int = {
(rsp.replicating, rsp.replicationTimeRemaining) match {
case (None, _) => 1 // the appropriate node hasn't shown up yet
case (Some("false"), _) => 0 // all done
case (Some(_), Some(remaining)) if remaining == 0.seconds =>
// the timeRemaining estimate initializes to 0 seconds, so ignore zeros and give it time to build a real estimate
5
case (Some(_), Some(remaining)) => remaining.toSeconds.toInt
case (Some(_), None) => 1 // we're replicating, but for some reason we can't tell how long is remaining
}
}
@tailrec
def waitForReplication(client: SolrClient, core: String):Boolean = {
val checkResponse = getReplicationDetails(client, core)
checkResponse match {
case Success(r) if checkStatusResponse(r) => {
val remaining = checkRemainingReplicationTime(r).seconds
if (remaining == 0.seconds) {
true
}
else {
comment.info(s"Waiting for replication, expected duration: ${remaining.toSeconds} seconds")
val delayMillis = if (remaining > 600.seconds) 300.seconds.toMillis else remaining.toMillis / 2
delay(Math.max(delayMillis, 1000))
waitForReplication(client, core)
}
}
case Success(r) if !checkStatusResponse(r) => {
comment.warn(s"Unexpected response checking replication status: $r")
false
}
case Failure(e) => {
comment.warn(s"Error checking replication status, $e")
false
}
}
}
@tailrec
def waitForBackup(client: SolrClient, core: String, since: Date): Boolean = {
val checkResponse = getReplicationDetails(client, core)
checkResponse match {
case Success(r) if checkStatusResponse(r) => {
(r.lastBackup, r.lastBackupSucceeded) match {
case (Some(when), Some(succeeded)) if when.after(since) =>
// the last backup date doesn't get updated until the backup finishes
succeeded
case _ =>
comment.info(s"Waiting for backup request of $core to complete")
delay(3.seconds)
waitForBackup(client, core, since)
}
}
case Success(r) if !checkStatusResponse(r) => {
comment.warn(s"Unexpected response checking replication status: $r")
false
}
case Failure(e) => {
comment.warn(s"Error checking replication status, $e")
false
}
}
}
@tailrec
def waitForRestore(client: SolrClient, core: String): Boolean = {
val checkResponse = getRestoreStatus(client, core)
checkResponse match {
case Success(r) if checkStatusResponse(r) =>
if (r.restoreSuccess) true
else if (r.restoreFailure) false
else {
comment.info(s"Waiting for restore request of $core to complete")
delay(3.seconds)
waitForRestore(client, core)
}
case Success(r) if !checkStatusResponse(r) => {
comment.warn(s"Unexpected response checking restore status: $r")
false
}
case Failure(e) => {
comment.warn(s"Error checking restore status, $e")
false
}
}
}
}
object SystemRequestHelpers {
private val systemReq = new ModifiableSolrParams
def getSystemInfo(url: String): Try[SystemStateResponse] = {
val client = new HttpSolrClient(url)
getSystemInfo(client)
}
def getSystemInfo(client: SolrClient): Try[SystemStateResponse] = {
SolrRequestHelpers.getSolrResponse(client, systemReq, "/admin/info/system")
.map(r => SystemStateResponse(r.rsp))
}
}