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// Copyright 2018 UANGEL
//
// Licensed 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 com.thing2x.smqd
import akka.actor.{Actor, Props}
import akka.cluster.ClusterEvent.{InitialStateAsEvents, MemberEvent, MemberLeft, UnreachableMember}
import akka.pattern.ask
import akka.util.Timeout
import com.thing2x.smqd.delivery.DeliveryManagerActor
import com.thing2x.smqd.fault.FaultNotificationManager
import com.thing2x.smqd.protocol.ProtocolNotificationManager
import com.thing2x.smqd.session.{ClusterModeSessionManagerActor, LocalModeSessionManagerActor, SessionManagerActor}
import com.thing2x.smqd.util.{JvmMonitoringActor, MetricActor}
import com.typesafe.scalalogging.StrictLogging
import scala.concurrent.ExecutionContext.Implicits.global
import scala.concurrent.duration._
import scala.concurrent.{Await, Future}
import scala.language.postfixOps
// 2018. 6. 2. - Created by Kwon, Yeong Eon
/**
* Top level actor that manages all actors working in smqd
*/
object ChiefActor {
val actorName = "chief"
case object Ready
case object ReadyAck
case object NodeInfoReq
}
import com.thing2x.smqd.ChiefActor._
class ChiefActor(smqd: Smqd, requestor: Requestor, registry: Registry, router: Router, retainer: Retainer, sstore: SessionStore)
extends Actor with StrictLogging {
override def preStart(): Unit = {
context.actorOf(Props(classOf[FaultNotificationManager], smqd), FaultNotificationManager.actorName)
context.actorOf(Props(classOf[ProtocolNotificationManager], smqd), ProtocolNotificationManager.actorName)
context.actorOf(Props(classOf[DeliveryManagerActor]), DeliveryManagerActor.actorName)
context.actorOf(Props(classOf[RegistryCallbackManagerActor], smqd), RegistryCallbackManagerActor.actorName)
context.actorOf(Props(classOf[RequestManagerActor], smqd, requestor), RequestManagerActor.actorName)
if (smqd.isClusterMode) {
context.actorOf(Props(classOf[ClusterModeSessionManagerActor], smqd, sstore), SessionManagerActor.actorName)
context.actorOf(Props(classOf[RoutesReplicator], smqd, router, registry), RoutesReplicator.actorName)
context.actorOf(Props(classOf[RetainsReplicator], smqd, retainer), RetainsReplicator.actorName)
}
else {
context.actorOf(Props(classOf[LocalModeSessionManagerActor], smqd, sstore), SessionManagerActor.actorName)
}
context.actorOf(Props(classOf[JvmMonitoringActor]), JvmMonitoringActor.actorName)
context.actorOf(Props(classOf[MetricActor], smqd), MetricActor.actorName)
context.children.foreach{ child =>
try {
implicit val readyTimeout: Timeout = 3 second
val future = child ? ChiefActor.Ready
Await.result(future, readyTimeout.duration) match {
case ChiefActor.ReadyAck =>
logger.info(s"${child.path} ready")
}
}
catch {
case x: Throwable =>
logger.error(s"${child.path} is NOT ready")
throw x
}
}
smqd.cluster match {
case Some(cl) =>
cl.subscribe(self, initialStateMode = InitialStateAsEvents, classOf[MemberEvent], classOf[UnreachableMember])
case _ =>
}
}
override def postStop(): Unit = {
smqd.cluster match {
case Some(cl) =>
cl.unsubscribe(self)
case _ =>
}
}
override def receive: Receive = {
case Ready =>
context.become(receive0)
smqd.setChiefActor(this)
// smqd.subscribe("$SYS/chief/committee/#", self) // may need in the future
sender ! ReadyAck
}
def receive0: Receive = {
case UnreachableMember(member) =>
logger.info("Member detected as unreachable: {}", member)
case MemberLeft(member) =>
logger.info("Member detected as leaving", member)
smqd.cluster match {
case Some(cl) =>
cl.down(member.address)
case _ =>
}
case evt: MemberEvent =>
logger.info("Member event: {}", evt)
case props: Props =>
logger.info("received actor props: {}", props.toString)
case NodeInfoReq =>
val node = smqd.cluster match {
case Some(cl) => // cluster mode
val leaderAddress = cl.state.leader
val m = cl.selfMember
NodeInfo(smqd.nodeName, smqd.apiEndpoint,
if (m.address.hasGlobalScope) m.address.hostPort else smqd.nodeHostPort,
m.status.toString,
m.roles.map(_.toString),
m.dataCenter,
leaderAddress match {
case Some(addr) => m.address == addr
case _ => false
})
case None => // non-cluster mode
NodeInfo(smqd.nodeName, smqd.apiEndpoint, smqd.nodeHostPort, "Up", Set.empty, "", isLeader = true)
}
sender ! node
}
import smqd.Implicit._
def nodeInfo: Future[Seq[NodeInfo]] = {
val actorSelections = smqd.cluster match {
case Some(cl) => // cluster mode ask all nodes
cl.state.members.map{ m =>
context.system.actorSelection(m.address.toString+"/user/"+actorName)
}.toSeq
case None => // non-cluster mode
Seq(context.system.actorSelection("/user/"+actorName))
}
val annsAsk = actorSelections.map{ selection =>
implicit val timeout: Timeout = 3.second
(selection ? NodeInfoReq).asInstanceOf[Future[NodeInfo]]
}
Future.sequence(annsAsk)
}
def nodeInfo(nodeName: String): Future[Option[NodeInfo]] = {
for {
infos <- this.nodeInfo
ninfo = infos.find(n => n.nodeName == nodeName)
} yield ninfo
}
}
