akka.cluster.ClusterEvent Scala Examples

The following examples show how to use akka.cluster.ClusterEvent. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example.
Example 1
Source File: DemoApp.scala    From sbt-reactive-app   with Apache License 2.0 5 votes vote down vote up 
package foo

import akka.actor.{ Actor, ActorLogging, ActorSystem, Props }
import akka.cluster.ClusterEvent.ClusterDomainEvent
import akka.cluster.{ Cluster, ClusterEvent }
import akka.http.scaladsl.Http
import akka.http.scaladsl.model._
import akka.http.scaladsl.server.Directives._
import akka.management.AkkaManagement
import akka.management.cluster.bootstrap.ClusterBootstrap
import akka.stream.ActorMaterializer

object DemoApp extends App {

  implicit val system = ActorSystem("Appka")

  import system.log
  implicit val mat = ActorMaterializer()
  val cluster = Cluster(system)

  log.info(s"Started [$system], cluster.selfAddress = ${cluster.selfAddress}")
  log.info("something2")
  //#start-akka-management
  AkkaManagement(system).start()
  //#start-akka-management
  ClusterBootstrap(system).start()

  cluster.subscribe(
    system.actorOf(Props[ClusterWatcher]),
    ClusterEvent.InitialStateAsEvents,
    classOf[ClusterDomainEvent])

  // add real app routes here
  val routes =
    path("hello") {
      get {
        complete(
          HttpEntity(
            ContentTypes.`text/html(UTF-8)`,
            "<h1>Hello</h1>"))
      }
    }
  Http().bindAndHandle(routes, "0.0.0.0", 8080)

  Cluster(system).registerOnMemberUp({
    log.info("Cluster member is up!")
  })

}

class ClusterWatcher extends Actor with ActorLogging {
  val cluster = Cluster(context.system)

  override def receive = {
    case msg ⇒ log.info(s"Cluster ${cluster.selfAddress} >>> " + msg)
  }
}
Example 2
Source File: HttpContactPointRoutesSpec.scala    From akka-management   with Apache License 2.0 5 votes vote down vote up 
package akka.management.cluster.bootstrap.contactpoint

import akka.cluster.{ Cluster, ClusterEvent }
import akka.event.NoLogging
import akka.http.scaladsl.testkit.ScalatestRouteTest
import akka.management.cluster.bootstrap.ClusterBootstrapSettings
import akka.testkit.{ SocketUtil, TestProbe }
import org.scalatest.concurrent.Eventually
import org.scalatest.time.{ Millis, Seconds, Span }
import org.scalatest.{ Matchers, WordSpecLike }

class HttpContactPointRoutesSpec
    extends WordSpecLike
    with Matchers
    with ScalatestRouteTest
    with HttpBootstrapJsonProtocol
    with Eventually {

  implicit override val patienceConfig: PatienceConfig =
    PatienceConfig(timeout = scaled(Span(3, Seconds)), interval = scaled(Span(50, Millis)))

  override def testConfigSource =
    s"""
    akka {
      remote {
        netty.tcp {
          hostname = "127.0.0.1"
          port = ${SocketUtil.temporaryServerAddress("127.0.0.1").getPort}
        }
      }
    }
    """.stripMargin

  "Http Bootstrap routes" should {

    val settings = ClusterBootstrapSettings(system.settings.config, NoLogging)
    val httpBootstrap = new HttpClusterBootstrapRoutes(settings)

    "empty list if node is not part of a cluster" in {
      ClusterBootstrapRequests.bootstrapSeedNodes("") ~> httpBootstrap.routes ~> check {
        responseAs[String] should include(""""seedNodes":[]""")
      }
    }

    "include seed nodes when part of a cluster" in {
      val cluster = Cluster(system)
      cluster.join(cluster.selfAddress)

      val p = TestProbe()
      cluster.subscribe(p.ref, ClusterEvent.InitialStateAsEvents, classOf[ClusterEvent.MemberUp])
      val up = p.expectMsgType[ClusterEvent.MemberUp]
      up.member should ===(cluster.selfMember)

      eventually {
        ClusterBootstrapRequests.bootstrapSeedNodes("") ~> httpBootstrap.routes ~> check {
          val response = responseAs[HttpBootstrapJsonProtocol.SeedNodes]
          response.seedNodes should !==(Set.empty)
          response.seedNodes.map(_.node) should contain(cluster.selfAddress)
        }
      }
    }
  }

}
Example 3
Source File: DemoApp.scala    From akka-management   with Apache License 2.0 5 votes vote down vote up 
package akka.cluster.bootstrap

import akka.actor.{ Actor, ActorLogging, ActorSystem, Props }
import akka.cluster.ClusterEvent.ClusterDomainEvent
import akka.cluster.{ Cluster, ClusterEvent }
import akka.http.scaladsl.Http
import akka.http.scaladsl.model._
import akka.http.scaladsl.server.Directives._
import akka.management.cluster.bootstrap.ClusterBootstrap
//#start-akka-management
import akka.management.scaladsl.AkkaManagement

//#start-akka-management
import akka.stream.ActorMaterializer

object DemoApp extends App {

  implicit val system = ActorSystem("Appka")

  import system.log
  implicit val mat = ActorMaterializer()
  val cluster = Cluster(system)

  log.info(s"Started [$system], cluster.selfAddress = ${cluster.selfAddress}")

  //#start-akka-management
  AkkaManagement(system).start()
  //#start-akka-management
  ClusterBootstrap(system).start()

  cluster.subscribe(
    system.actorOf(Props[ClusterWatcher]),
    ClusterEvent.InitialStateAsEvents,
    classOf[ClusterDomainEvent]
  )

  // add real app routes here
  val routes =
    path("hello") {
      get {
        complete(
          HttpEntity(
            ContentTypes.`text/html(UTF-8)`,
            "<h1>Hello</h1>"
          )
        )
      }
    }
  Http().bindAndHandle(routes, "0.0.0.0", 8080)

  Cluster(system).registerOnMemberUp({
    log.info("Cluster member is up!")
  })

}

class ClusterWatcher extends Actor with ActorLogging {
  val cluster = Cluster(context.system)

  override def receive = {
    case msg => log.info(s"Cluster ${cluster.selfAddress} >>> " + msg)
  }
}
Example 4
Source File: ClusterApp.scala    From akka-management   with Apache License 2.0 5 votes vote down vote up 
package akka.cluster.bootstrap

import akka.actor.{ Actor, ActorLogging, ActorSystem, PoisonPill, Props }
import akka.cluster.ClusterEvent.ClusterDomainEvent
import akka.cluster.singleton.{ ClusterSingletonManager, ClusterSingletonManagerSettings }
import akka.cluster.{ Cluster, ClusterEvent }
import akka.http.scaladsl.Http
import akka.http.scaladsl.model._
import akka.http.scaladsl.server.Directives._
import akka.management.cluster.bootstrap.ClusterBootstrap
import akka.management.scaladsl.AkkaManagement
import akka.stream.ActorMaterializer

object ClusterApp {

  def main(args: Array[String]): Unit = {

    implicit val system = ActorSystem()
    implicit val materializer = ActorMaterializer()
    implicit val executionContext = system.dispatcher
    val cluster = Cluster(system)

    system.log.info("Starting Akka Management")
    AkkaManagement(system).start()
    ClusterBootstrap(system).start()

    system.actorOf(
      ClusterSingletonManager.props(
        Props[NoisySingleton],
        PoisonPill,
        ClusterSingletonManagerSettings(system)
      )
    )
    Cluster(system).subscribe(
      system.actorOf(Props[ClusterWatcher]),
      ClusterEvent.InitialStateAsEvents,
      classOf[ClusterDomainEvent]
    )

    // add real app routes here
    val routes =
      path("hello") {
        get {
          complete(
            HttpEntity(ContentTypes.`text/html(UTF-8)`, "<h1>Hello</h1>")
          )
        }
      }

    Http().bindAndHandle(routes, "0.0.0.0", 8080)

    system.log.info(
      s"Server online at http://localhost:8080/\nPress RETURN to stop..."
    )

    cluster.registerOnMemberUp(() => {
      system.log.info("Cluster member is up!")
    })
  }

  class ClusterWatcher extends Actor with ActorLogging {
    val cluster = Cluster(context.system)

    override def receive = {
      case msg => log.info(s"Cluster ${cluster.selfAddress} >>> " + msg)
    }
  }
}
Example 5
Source File: DemoApp.scala    From akka-management   with Apache License 2.0 5 votes vote down vote up 
package akka.cluster.bootstrap

import akka.actor.{ Actor, ActorLogging, ActorSystem, Props }
import akka.cluster.ClusterEvent.ClusterDomainEvent
import akka.cluster.{ Cluster, ClusterEvent }
import akka.http.scaladsl.Http
import akka.management.scaladsl.AkkaManagement
import akka.management.cluster.bootstrap.ClusterBootstrap
import akka.stream.ActorMaterializer
import akka.stream.scaladsl.Sink
import akka.stream.scaladsl.Source
import com.typesafe.config.ConfigFactory

object DemoApp extends App {

  implicit val system = ActorSystem("simple")

  import system.log
  import system.dispatcher
  implicit val mat = ActorMaterializer()
  val cluster = Cluster(system)

  log.info("Started [{}], cluster.selfAddress = {}", system, cluster.selfAddress)

  AkkaManagement(system).start()
  ClusterBootstrap(system).start()

  cluster
    .subscribe(system.actorOf(Props[ClusterWatcher]), ClusterEvent.InitialStateAsEvents, classOf[ClusterDomainEvent])

  import akka.http.scaladsl.server.Directives._
  Http().bindAndHandle(complete("Hello world"), "0.0.0.0", 8080)

}

class ClusterWatcher extends Actor with ActorLogging {
  val cluster = Cluster(context.system)

  override def receive = {
    case msg => log.info("Cluster {} >>> {}", msg, cluster.selfAddress)
  }
}
Example 6
Source File: ClusterListener.scala    From akka-sample-cluster-docker-compose-scala   with Apache License 2.0 5 votes vote down vote up 
package com.example

import akka.actor.typed.Behavior
import akka.actor.typed.scaladsl.Behaviors
import akka.cluster.ClusterEvent
import akka.cluster.ClusterEvent._
import akka.cluster.typed.Cluster
import akka.cluster.typed.Subscribe

object ClusterListener {
  def apply(): Behavior[ClusterEvent.ClusterDomainEvent] =
    Behaviors.setup { ctx =>
      ctx.log.debug("starting up cluster listener...")
      Cluster(ctx.system).subscriptions ! Subscribe(ctx.self, classOf[ClusterEvent.ClusterDomainEvent])

      Behaviors.receiveMessagePartial {
        case MemberUp(member) =>
          ctx.log.debug("Member is Up: {}", member.address)
          Behaviors.same
        case UnreachableMember(member) =>
          ctx.log.debug("Member detected as unreachable: {}", member)
          Behaviors.same
        case MemberRemoved(member, previousStatus) =>
          ctx.log.debug("Member is Removed: {} after {}",
            member.address, previousStatus)
          Behaviors.same
        case LeaderChanged(member) =>
          ctx.log.info("Leader changed: " + member)
          Behaviors.same
        case any: MemberEvent =>
          ctx.log.info("Member Event: " + any.toString)
          Behaviors.same
      }
    }
}
Example 7
Source File: ClusterEventSubscription.scala    From ForestFlow   with Apache License 2.0 5 votes vote down vote up 
package ai.forestflow.serving.cluster

import akka.actor.{Actor, ActorLogging}
import akka.cluster.ClusterEvent.{MemberEvent, MemberRemoved, MemberUp, UnreachableMember}
import akka.cluster.{Cluster, ClusterEvent}

trait ClusterEventSubscription {
  this: Actor with ActorLogging =>

  implicit val cluster: Cluster = Cluster(context.system)

  // subscribe to cluster changes, re-subscribe when restart
  override def preStart(): Unit = {
    cluster.subscribe(self, ClusterEvent.initialStateAsEvents, classOf[MemberEvent], classOf[UnreachableMember])
  }
  override def postStop(): Unit = cluster.unsubscribe(self)

  def clusterEvents : Receive = {
    case MemberUp(member) =>
      log.info("Member is Up: {}", member.address)
    case UnreachableMember(member) =>
      log.info("Member detected as unreachable: {}", member)
    case MemberRemoved(member, previousStatus) =>
      log.info("Member is Removed: {} after {}",
        member.address, previousStatus)
    case _: MemberEvent => // ignore
  }
}
Example 8
Source File: ClusterApp.scala    From reactive-lib   with Apache License 2.0 5 votes vote down vote up 
package foo

import akka.actor.{ Actor, ActorLogging, ActorSystem, PoisonPill, Props }
import akka.cluster.ClusterEvent.ClusterDomainEvent
import akka.cluster.singleton.{ ClusterSingletonManager, ClusterSingletonManagerSettings }
import akka.cluster.{ Cluster, ClusterEvent }
import akka.http.scaladsl.Http
import akka.http.scaladsl.model._
import akka.http.scaladsl.server.Directives._
import akka.management.AkkaManagement
import akka.management.cluster.bootstrap.ClusterBootstrap
import akka.stream.ActorMaterializer

object ClusterApp {

  def main(args: Array[String]): Unit = {

    implicit val system = ActorSystem()
    implicit val materializer = ActorMaterializer()
    implicit val executionContext = system.dispatcher

    val cluster = Cluster(system)
    system.log.info("Starting Akka Management")
    system.log.info("something2")
    // AkkaManagement(system).start()
    // ClusterBootstrap(system).start()

    system.actorOf(
      ClusterSingletonManager.props(
        Props[NoisySingleton],
        PoisonPill,
        ClusterSingletonManagerSettings(system)))
    Cluster(system).subscribe(
      system.actorOf(Props[ClusterWatcher]),
      ClusterEvent.InitialStateAsEvents,
      classOf[ClusterDomainEvent])

    // add real app routes here
    val routes =
      path("hello") {
        get {
          complete(
            HttpEntity(ContentTypes.`text/html(UTF-8)`, "<h1>Hello</h1>"))
        }
      }

    Http().bindAndHandle(routes, "0.0.0.0", 8080)

    system.log.info(
      s"Server online at http://localhost:8080/\nPress RETURN to stop...")

    cluster.registerOnMemberUp(() => {
      system.log.info("Cluster member is up!")
    })
  }

  class ClusterWatcher extends Actor with ActorLogging {
    val cluster = Cluster(context.system)

    override def receive = {
      case msg ⇒ log.info(s"Cluster ${cluster.selfAddress} >>> " + msg)
    }
  }
}
Example 9
Source File: DemoApp.scala    From reactive-lib   with Apache License 2.0 5 votes vote down vote up 
package foo

import akka.actor.{ Actor, ActorLogging, ActorSystem, Props }
import akka.cluster.ClusterEvent.ClusterDomainEvent
import akka.cluster.{ Cluster, ClusterEvent }
import akka.http.scaladsl.Http
import akka.http.scaladsl.model._
import akka.http.scaladsl.server.Directives._
import akka.management.AkkaManagement
import akka.management.cluster.bootstrap.ClusterBootstrap
import akka.stream.ActorMaterializer

object DemoApp extends App {

  implicit val system = ActorSystem("Appka")

  import system.log
  implicit val mat = ActorMaterializer()
  val cluster = Cluster(system)

  log.info(s"Started [$system], cluster.selfAddress = ${cluster.selfAddress}")
  log.info("something2")
  //#start-akka-management
  AkkaManagement(system).start()
  //#start-akka-management
  ClusterBootstrap(system).start()

  cluster.subscribe(
    system.actorOf(Props[ClusterWatcher]),
    ClusterEvent.InitialStateAsEvents,
    classOf[ClusterDomainEvent])

  // add real app routes here
  val routes =
    path("hello") {
      get {
        complete(
          HttpEntity(
            ContentTypes.`text/html(UTF-8)`,
            "<h1>Hello</h1>"))
      }
    }
  Http().bindAndHandle(routes, "0.0.0.0", 8080)

  Cluster(system).registerOnMemberUp({
    log.info("Cluster member is up!")
  })

}

class ClusterWatcher extends Actor with ActorLogging {
  val cluster = Cluster(context.system)

  override def receive = {
    case msg ⇒ log.info(s"Cluster ${cluster.selfAddress} >>> " + msg)
  }
}
Example 10
Source File: ClusterStateInformer.scala    From distributed-cache-on-k8s-poc   with MIT License 5 votes vote down vote up 
package cluster

import akka.actor.{ Actor, ActorLogging, Props }
import akka.cluster.ClusterEvent._
import akka.cluster.{ Cluster, ClusterEvent }

class ClusterStateInformer extends Actor with ActorLogging {
  val cluster = Cluster(context.system)

  override def preStart(): Unit = {
    cluster.subscribe(
      subscriber = self,
      initialStateMode = ClusterEvent.InitialStateAsEvents,
      to = classOf[MemberEvent], classOf[UnreachableMember]
    )
  }

  override def postStop(): Unit = cluster.unsubscribe(self)

  override def receive: Receive = {
    case MemberJoined(member) => log.info(s"Member ${member.address} Joined")
    case MemberUp(member) => log.info("Member is Up: {}", member.address)
    case UnreachableMember(member) => log.info("Member detected as unreachable: {}", member)
    case MemberRemoved(member, previousStatus) =>
      log.info(
        "Member is Removed: {} after {}",
        member.address, previousStatus)
    case me: MemberEvent ⇒ log.info(s"Received Member event $me for Member: ${me.member.address}")
  }
}

object ClusterStateInformer {
  def props():Props = Props(new ClusterStateInformer)
}
Example 11
Source File: AkkaKubernetes.scala    From akka-kubernetes-tests   with Apache License 2.0 5 votes vote down vote up 
package akka.kubernetes.sample

import akka.actor.{Actor, ActorLogging, ActorSystem, PoisonPill, Props}
import akka.cluster.ClusterEvent.ClusterDomainEvent
import akka.cluster.sharding.{ClusterSharding, ClusterShardingSettings}
import akka.cluster.singleton.{
  ClusterSingletonManager,
  ClusterSingletonManagerSettings,
  ClusterSingletonProxy,
  ClusterSingletonProxySettings
}
import akka.cluster.{Cluster, ClusterEvent}
import akka.http.scaladsl.Http
import akka.http.scaladsl.server.Directives._
import akka.management.cluster.bootstrap.ClusterBootstrap
import akka.management.scaladsl.AkkaManagement
import akka.stream.ActorMaterializer

object DemoApp extends App {

  implicit val system = ActorSystem("KubernetesTest")

  import system.{dispatcher, log}

  implicit val mat = ActorMaterializer()
  implicit val cluster = Cluster(system)

  log.info("Running with [{}]", new Resources())
  log.info(s"Started [$system], cluster.selfAddress = ${cluster.selfAddress}")

  AkkaManagement(system).start()
  ClusterBootstrap(system).start()

  system.actorOf(
    ClusterSingletonManager.props(singletonProps = Props(new AkkaBoss("patriknw")),
                                  terminationMessage = PoisonPill,
                                  settings = ClusterSingletonManagerSettings(system)),
    "boss"
  )

  val bossProxy = system.actorOf(
    ClusterSingletonProxy.props(singletonManagerPath = "/user/boss", settings = ClusterSingletonProxySettings(system)),
    name = "bossProxy"
  )

  val teamMembers = ClusterSharding(system).start(
    "team-member",
    Props(new AkkaMember()),
    ClusterShardingSettings(system),
    AkkaMember.extractEntityId,
    AkkaMember.extractShardId
  )

  cluster.subscribe(system.actorOf(Props[ClusterWatcher]),
                    ClusterEvent.InitialStateAsEvents,
                    classOf[ClusterDomainEvent])

  val talkToTheBoss = new TalkToTheBossRouteRoute(bossProxy)
  val talkToATeamMember = new TalkToATeamMemberRoute(teamMembers)

  Http().bindAndHandle(
    concat(talkToTheBoss.route(),
           talkToATeamMember.route(),
           ClusterStateRoute.routeGetMembers(cluster),
           VersionRoute.versionRoute),
    "0.0.0.0",
    8080
  )

  Cluster(system).registerOnMemberUp({
    log.info("Cluster member is up!")
  })

}

class ClusterWatcher extends Actor with ActorLogging {
  implicit val cluster = Cluster(context.system)

  override def receive = {
    case msg ⇒ log.info(s"Cluster ${cluster.selfAddress} >>> " + msg)
  }
}
Example 12
Source File: ClusterApp.scala    From reactive-cli   with Apache License 2.0 5 votes vote down vote up 
package foo

import akka.actor.{ Actor, ActorLogging, ActorSystem, PoisonPill, Props }
import akka.cluster.ClusterEvent.ClusterDomainEvent
import akka.cluster.singleton.{ ClusterSingletonManager, ClusterSingletonManagerSettings }
import akka.cluster.{ Cluster, ClusterEvent }
import akka.http.scaladsl.Http
import akka.http.scaladsl.model._
import akka.http.scaladsl.server.Directives._
import akka.stream.ActorMaterializer

object ClusterApp {

  def main(args: Array[String]): Unit = {

    implicit val system = ActorSystem()
    implicit val materializer = ActorMaterializer()
    implicit val executionContext = system.dispatcher

    val cluster = Cluster(system)
    system.log.info("Starting Akka Management")
    system.log.info("something2")
    // AkkaManagement(system).start()
    // ClusterBootstrap(system).start()

    system.actorOf(
      ClusterSingletonManager.props(
        Props[NoisySingleton],
        PoisonPill,
        ClusterSingletonManagerSettings(system)))
    Cluster(system).subscribe(
      system.actorOf(Props[ClusterWatcher]),
      ClusterEvent.InitialStateAsEvents,
      classOf[ClusterDomainEvent])

    // add real app routes here
    val routes =
      path("hello") {
        get {
          complete(
            HttpEntity(ContentTypes.`text/html(UTF-8)`, "<h1>Hello</h1>"))
        }
      }

    Http().bindAndHandle(routes, "0.0.0.0", 8080)

    system.log.info(
      s"Server online at http://localhost:8080/\nPress RETURN to stop...")

    cluster.registerOnMemberUp(() => {
      system.log.info("Cluster member is up!")
    })
  }

  class ClusterWatcher extends Actor with ActorLogging {
    val cluster = Cluster(context.system)

    override def receive = {
      case msg ⇒ log.info(s"Cluster ${cluster.selfAddress} >>> " + msg)
    }
  }
}
Example 13
Source File: ClusterApp.scala    From reactive-cli   with Apache License 2.0 5 votes vote down vote up 
package foo

import akka.actor.{ Actor, ActorLogging, ActorSystem, PoisonPill, Props }
import akka.cluster.ClusterEvent.ClusterDomainEvent
import akka.cluster.singleton.{ ClusterSingletonManager, ClusterSingletonManagerSettings }
import akka.cluster.{ Cluster, ClusterEvent }
import akka.http.scaladsl.Http
import akka.http.scaladsl.model._
import akka.http.scaladsl.server.Directives._
import akka.stream.ActorMaterializer

object ClusterApp {

  def main(args: Array[String]): Unit = {

    implicit val system = ActorSystem()
    implicit val materializer = ActorMaterializer()
    implicit val executionContext = system.dispatcher

    val cluster = Cluster(system)
    system.log.info("Starting Akka Management")
    system.log.info("something2")
    // AkkaManagement(system).start()
    // ClusterBootstrap(system).start()

    system.actorOf(
      ClusterSingletonManager.props(
        Props[NoisySingleton],
        PoisonPill,
        ClusterSingletonManagerSettings(system)))
    Cluster(system).subscribe(
      system.actorOf(Props[ClusterWatcher]),
      ClusterEvent.InitialStateAsEvents,
      classOf[ClusterDomainEvent])

    // add real app routes here
    val routes =
      path("hello") {
        get {
          complete(
            HttpEntity(ContentTypes.`text/html(UTF-8)`, "<h1>Hello</h1>"))
        }
      }

    Http().bindAndHandle(routes, "0.0.0.0", 8080)

    system.log.info(
      s"Server online at http://localhost:8080/\nPress RETURN to stop...")

    cluster.registerOnMemberUp(() => {
      system.log.info("Cluster member is up!")
    })
  }

  class ClusterWatcher extends Actor with ActorLogging {
    val cluster = Cluster(context.system)

    override def receive = {
      case msg ⇒ log.info(s"Cluster ${cluster.selfAddress} >>> " + msg)
    }
  }
}