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package io.crashbox.ci
import java.io.{File, OutputStream}
import java.net.URL
import java.nio.file.Files
import scala.collection.mutable.HashMap
import scala.concurrent.Future
import scala.concurrent.duration._
import scala.util.{Failure, Success}
import akka.actor.{Actor, ActorLogging, ActorRef, Props, Terminated}
import akka.util.Timeout
class Scheduler(
val executor: DockerExecutor,
storage: Storage
)(implicit core: Core) {
import Scheduler._
import core._
import executor._
import storage._
private def newTempDir: File =
Files.createTempDirectory("crashbox-run").toFile()
class BuildManager(
buildId: BuildId,
url: URL
) extends Actor
with ActorLogging {
var buildDir: Option[File] = None
var out: Option[OutputStream] = None
var containerId: Option[ExecutionId] = None
override def postStop() = {
containerId foreach { cancelExecution(_) }
out foreach { _.close() }
buildDir foreach { _.delete() }
log.info(s"Stopped build of $url")
}
override def preStart() = {
log.info(s"Started build of $url")
self ! Cloning(url)
}
override def receive: Receive = {
case state @ Cloning(url) =>
log.debug("Update build state: cloning")
updateBuildState(buildId, state)
Git.fetchSource(url, newTempDir) onComplete {
case Success(dir) =>
self ! Parsing(dir)
case Failure(err) =>
self ! Failed(s"Error fetching source from $url")
}
case state @ Parsing(src) =>
log.debug("Update build state: parsing")
updateBuildState(buildId, state)
buildDir = Some(src)
Parser.parseBuild(src) match {
case Left(buildDef) =>
self ! Starting(src, buildDef)
case Right(err) =>
self ! Failed(s"Failed to parse build $err")
}
case state @ Starting(src, bd) =>
log.debug("Update build state: starting")
updateBuildState(buildId, state)
val so = saveLog(buildId, 0)
out = Some(so)
startExecution(bd.image, bd.script, src, so) onComplete {
case Success(id) =>
self ! Running(id)
case Failure(err) =>
self ! Failed(s"Failed to start build $err")
}
case state @ Running(id) =>
log.debug("Update build state: running")
updateBuildState(buildId, state)
containerId = Some(id)
waitExecution(id) onComplete {
case Success(status) =>
self ! Finished(status)
case Failure(err) =>
self ! Failed(s"Error waiting for build to complete")
}
case state @ Finished(status) =>
log.debug("Update build state: finished")
updateBuildState(buildId, state)
context stop self
case state @ Failed(message) =>
log.debug("Update build state: failed")
updateBuildState(buildId, state)
context stop self
}
}
object BuildManager {
def apply(buildId: BuildId, url: URL) =
Props(new BuildManager(buildId, url))
}
private sealed trait SchedulerCommand
private case class ScheduleBuild(url: URL) extends SchedulerCommand
private case class CancelBuild(buildId: BuildId) extends SchedulerCommand
class Scheduler extends Actor {
val runningBuilds = new HashMap[BuildId, ActorRef]
override def receive = {
case ScheduleBuild(url) =>
val client = sender
//todo handle failure
nextBuild(url.toString).foreach{ build =>
val buildManager =
context.actorOf(BuildManager(build.id, url), s"build-${build.id}")
context watch buildManager
runningBuilds += build.id -> buildManager
client ! build.id
}
case CancelBuild(id) =>
runningBuilds.get(id).foreach { builder =>
context.stop(builder)
}
case Terminated(buildManager) =>
//TODO use a more efficient data structure
runningBuilds.find(_._2 == buildManager).foreach {
runningBuilds -= _._1
}
}
}
private val scheduler =
system.actorOf(Props(new Scheduler()), "crashbox-scheduler")
// None if build can not be scheduled (queue is full)
def scheduleBuild(url: URL): Future[BuildId] = {
import akka.pattern.ask
implicit val timeout: Timeout = Timeout(5.seconds)
(scheduler ? ScheduleBuild(url)).mapTo[BuildId]
}
def cancelBuild(buildId: BuildId): Unit = {
scheduler ! CancelBuild(buildId)
}
}
object Scheduler {
sealed trait BuildState
case class Cloning(url: URL) extends BuildState
case class Parsing(dir: File) extends BuildState
case class Starting(dir: File, buildDef: BuildDef) extends BuildState
case class Running(id: ExecutionId) extends BuildState
sealed trait EndBuildState extends BuildState
case class Finished(status: Int) extends EndBuildState
case class Failed(message: String) extends EndBuildState
}
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