├── sigar ├── sigar-x86-winnt.dll ├── sigar-x86-winnt.lib ├── libsigar-ia64-linux.so ├── libsigar-pa-hpux-11.sl ├── libsigar-ppc-aix-5.so ├── libsigar-ppc-linux.so ├── libsigar-x86-linux.so ├── sigar-amd64-winnt.dll ├── libsigar-amd64-linux.so ├── libsigar-ia64-hpux-11.sl ├── libsigar-ppc64-aix-5.so ├── libsigar-ppc64-linux.so ├── libsigar-s390x-linux.so ├── libsigar-x86-solaris.so ├── libsigar-amd64-freebsd-6.so ├── libsigar-amd64-solaris.so ├── libsigar-sparc-solaris.so ├── libsigar-sparc64-solaris.so ├── libsigar-x86-freebsd-5.so ├── libsigar-x86-freebsd-6.so ├── libsigar-universal-macosx.dylib └── libsigar-universal64-macosx.dylib ├── project ├── plugins.sbt └── build.properties ├── activator.properties ├── .gitignore ├── src ├── main │ ├── scala │ │ └── com │ │ │ └── boldradius │ │ │ ├── sample │ │ │ └── cluster │ │ │ │ ├── SampleClusterApp.scala │ │ │ │ ├── SampleClusterDefs.scala │ │ │ │ ├── SampleClusterHttpRoute.scala │ │ │ │ ├── SampleClusterFrontend.scala │ │ │ │ └── SampleClusterBackend.scala │ │ │ └── util │ │ │ └── Json4sSupport.scala │ └── resources │ │ └── application.conf └── test │ └── scala │ └── com │ └── boldradius │ └── sample │ └── cluster │ ├── HttpRouteSpec.scala │ └── FrontendSpec.scala ├── tutorial └── index.html └── LICENSE /sigar/sigar-x86-winnt.dll: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/sigar-x86-winnt.dll -------------------------------------------------------------------------------- /sigar/sigar-x86-winnt.lib: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/sigar-x86-winnt.lib -------------------------------------------------------------------------------- /sigar/libsigar-ia64-linux.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-ia64-linux.so -------------------------------------------------------------------------------- /sigar/libsigar-pa-hpux-11.sl: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-pa-hpux-11.sl -------------------------------------------------------------------------------- /sigar/libsigar-ppc-aix-5.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-ppc-aix-5.so -------------------------------------------------------------------------------- /sigar/libsigar-ppc-linux.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-ppc-linux.so -------------------------------------------------------------------------------- /sigar/libsigar-x86-linux.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-x86-linux.so -------------------------------------------------------------------------------- /sigar/sigar-amd64-winnt.dll: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/sigar-amd64-winnt.dll -------------------------------------------------------------------------------- /sigar/libsigar-amd64-linux.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-amd64-linux.so -------------------------------------------------------------------------------- /sigar/libsigar-ia64-hpux-11.sl: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-ia64-hpux-11.sl -------------------------------------------------------------------------------- /sigar/libsigar-ppc64-aix-5.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-ppc64-aix-5.so -------------------------------------------------------------------------------- /sigar/libsigar-ppc64-linux.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-ppc64-linux.so -------------------------------------------------------------------------------- /sigar/libsigar-s390x-linux.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-s390x-linux.so -------------------------------------------------------------------------------- /sigar/libsigar-x86-solaris.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-x86-solaris.so -------------------------------------------------------------------------------- /sigar/libsigar-amd64-freebsd-6.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-amd64-freebsd-6.so -------------------------------------------------------------------------------- /sigar/libsigar-amd64-solaris.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-amd64-solaris.so -------------------------------------------------------------------------------- /sigar/libsigar-sparc-solaris.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-sparc-solaris.so -------------------------------------------------------------------------------- /sigar/libsigar-sparc64-solaris.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-sparc64-solaris.so -------------------------------------------------------------------------------- /sigar/libsigar-x86-freebsd-5.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-x86-freebsd-5.so -------------------------------------------------------------------------------- /sigar/libsigar-x86-freebsd-6.so: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-x86-freebsd-6.so -------------------------------------------------------------------------------- /project/plugins.sbt: -------------------------------------------------------------------------------- 1 | 2 | resolvers += Classpaths.typesafeResolver 3 | 4 | addSbtPlugin("org.scala-sbt.plugins" % "sbt-onejar" % "0.8") 5 | -------------------------------------------------------------------------------- /sigar/libsigar-universal-macosx.dylib: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-universal-macosx.dylib -------------------------------------------------------------------------------- /sigar/libsigar-universal64-macosx.dylib: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/boldradius/akka-adaptive-cluster-aws/HEAD/sigar/libsigar-universal64-macosx.dylib -------------------------------------------------------------------------------- /project/build.properties: -------------------------------------------------------------------------------- 1 | #Activator-generated Properties 2 | #Wed Dec 17 14:53:53 UTC 2014 3 | template.uuid=7193124a-3994-4b10-8b01-a17f75ed2ea4 4 | sbt.version=0.13.1 5 | -------------------------------------------------------------------------------- /activator.properties: -------------------------------------------------------------------------------- 1 | name=akka-http-adaptive-cluster-aws 2 | title=Akka cluster with adaptive group strategy 3 | description=A seed microservice with Akka 'adaptive group' cluster and instructions for AWS configuration. 4 | tags=akka-http,akka,cluster,microservice,starter,seed,scala,cake,pattern 5 | authorTwitter=boldradius 6 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | *.class 2 | *.log 3 | *.classpath 4 | *.cache 5 | *.project 6 | *.settings 7 | # sbt specific 8 | .cache/ 9 | .history/ 10 | .lib/ 11 | .idea/ 12 | dist/* 13 | target/ 14 | lib_managed/ 15 | src_managed/ 16 | project/boot/ 17 | project/plugins/project/ 18 | 19 | # Scala-IDE specific 20 | .scala_dependencies 21 | .worksheet 22 | *.sc 23 | -------------------------------------------------------------------------------- /src/main/scala/com/boldradius/sample/cluster/SampleClusterApp.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import com.typesafe.config.ConfigFactory 4 | 5 | object SampleClusterApp { 6 | def main(args: Array[String]): Unit = { 7 | 8 | // starting 3 backend nodes and 1 frontend node 9 | SampleClusterBackend.main(Seq("2551").toArray) 10 | SampleClusterBackend.main(Seq("2552").toArray) 11 | SampleClusterBackend.main(Array.empty) 12 | SampleClusterFrontend.main(Array.empty) 13 | } 14 | 15 | } -------------------------------------------------------------------------------- /tutorial/index.html: -------------------------------------------------------------------------------- 1 | 2 |
3 |

Introduction

4 | A seed 'one action' microservice using akka-http, akka cluster with adaptive-group strategy along with link to instructions how to install, configure and run the cluster on AWS instances. 5 |
6 |
7 |

Features

8 | 22 |
23 | 24 | -------------------------------------------------------------------------------- /src/main/scala/com/boldradius/sample/cluster/SampleClusterDefs.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import scala.language.implicitConversions 4 | 5 | object SampleClusterDefs { 6 | 7 | case class GetActorMetrics() 8 | 9 | trait MetricsT 10 | case class NoMetricsPresent() extends MetricsT 11 | case class Metrics(address: String, timestamp: Long, cpu: Double) extends MetricsT 12 | 13 | case class SimpleClusterResponse(status: String, details: ResponseDetails) 14 | 15 | sealed trait ResponseDetails 16 | case class MetricsDetails(metrics: MetricsT) extends ResponseDetails 17 | implicit def Metrics2ResponseDetails(metrics: MetricsT) = MetricsDetails(metrics) 18 | case class ErrorDetails(message: String) extends ResponseDetails 19 | implicit def Throwable2ResponseDetails(error: Throwable) = ErrorDetails(error.getMessage()) 20 | 21 | val ActorSystemName = "ClusterSystem" 22 | val FrontendActorName = "sampleClusterFrontend" 23 | val FrontendActorRoleName = "frontend" 24 | val BackendRouterName = "sampleClusterBackendRouter" 25 | val BackendActorName = "sampleClusterBackend" 26 | val BackendActorRoleName = "backend" 27 | } -------------------------------------------------------------------------------- /src/main/scala/com/boldradius/sample/cluster/SampleClusterHttpRoute.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import akka.http.marshalling._ 4 | import akka.http.model._ 5 | import akka.http.server.Directives._ 6 | import akka.http.server.Route 7 | import akka.stream.FlowMaterializer 8 | import akka.util.Timeout 9 | import akka.pattern.ask 10 | import scala.concurrent.ExecutionContext.Implicits.global 11 | import scala.concurrent.duration._ 12 | import scala.language.postfixOps 13 | import akka.actor.ActorRef 14 | import SampleClusterDefs._ 15 | import akka.cluster.NodeMetrics 16 | import scala.util.Success 17 | import scala.util.Failure 18 | import com.boldradius.util.Json4sSupport 19 | 20 | trait SampleClusterHttpRoute extends Json4sSupport { 21 | 22 | implicit val timeout = Timeout(3 seconds) 23 | 24 | def route(frontendActor: ActorRef)(implicit fm: FlowMaterializer): Route = { 25 | 26 | get { 27 | path("cluster") { 28 | onComplete((frontendActor ? GetActorMetrics()).mapTo[MetricsT]) { 29 | case Success(metrics) => 30 | complete(SimpleClusterResponse("success", metrics)) 31 | case Failure(f) => 32 | complete(SimpleClusterResponse("error", f)) 33 | } 34 | } 35 | } 36 | } 37 | } 38 | 39 | -------------------------------------------------------------------------------- /src/main/resources/application.conf: -------------------------------------------------------------------------------- 1 | 2 | akka { 3 | actor { 4 | provider = "akka.cluster.ClusterActorRefProvider" 5 | } 6 | remote { 7 | log-remote-lifecycle-events = off 8 | netty.tcp { 9 | hostname = "127.0.0.1" 10 | port = 0 11 | } 12 | } 13 | 14 | cluster { 15 | seed-nodes = [ 16 | "akka.tcp://ClusterSystem@127.0.0.1:2551", 17 | "akka.tcp://ClusterSystem@127.0.0.1:2552"] 18 | 19 | auto-down-unreachable-after = 10s 20 | } 21 | } 22 | 23 | # //#min-nr-of-members 24 | akka.cluster.min-nr-of-members = 3 25 | # //#min-nr-of-members 26 | 27 | # //#role-min-nr-of-members 28 | akka.cluster.role { 29 | frontend.min-nr-of-members = 1 30 | backend.min-nr-of-members = 2 31 | } 32 | # //#role-min-nr-of-members 33 | 34 | # //#adaptive-router 35 | akka.actor.deployment { 36 | /sampleClusterFrontend/sampleClusterBackendRouter = { 37 | router = adaptive-group 38 | # metrics-selector = heap 39 | # metrics-selector = load 40 | # metrics-selector = cpu 41 | metrics-selector = mix 42 | nr-of-instances = 100 43 | routees.paths = ["/user/sampleClusterBackend"] 44 | cluster { 45 | enabled = on 46 | use-role = backend 47 | allow-local-routees = off 48 | } 49 | } 50 | } 51 | # //#adaptive-router 52 | -------------------------------------------------------------------------------- /src/test/scala/com/boldradius/sample/cluster/HttpRouteSpec.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import org.junit.runner.RunWith 4 | import org.scalatest.junit.JUnitRunner 5 | import akka.actor.{ Actor, ActorRef, Props } 6 | import akka.http.model._ 7 | import akka.http.testkit._ 8 | import org.scalatest._ 9 | import scala.concurrent.duration._ 10 | import SampleClusterDefs._ 11 | import akka.cluster.NodeMetrics 12 | import akka.actor.Address 13 | import akka.testkit.TestActorRef 14 | 15 | @RunWith(classOf[JUnitRunner]) 16 | class HttpRouteSpec extends FlatSpecLike 17 | with ScalatestRouteTest 18 | with MustMatchers 19 | with BeforeAndAfterAll 20 | with SampleClusterHttpRoute { 21 | 22 | override def afterAll() { 23 | system.shutdown() 24 | } 25 | 26 | /* Should be set! 27 | ** Otherwise returns: 28 | ** 'Request was neither completed nor rejected within 1 second'. 29 | */ 30 | implicit val routeTestTimeout = RouteTestTimeout(5.second) 31 | 32 | trait TestFrontend { 33 | val testResp = Metrics(address = "test", timestamp = 1L, cpu = 0.1) 34 | val testFrontendActor = TestActorRef(Props(new Actor { 35 | def receive = { 36 | case c: GetActorMetrics => sender() ! testResp 37 | } 38 | })) 39 | } 40 | 41 | "/cluster " should "return metrics" in new TestFrontend { 42 | 43 | Get(Uri("/cluster")) ~> route(testFrontendActor) ~> check { 44 | 45 | responseAs[Any] must be(Map("status" -> "success", "details" -> Map("metrics" -> Map("address" -> "test", "timestamp" -> 1, "cpu" -> 0.1)))) 46 | } 47 | 48 | } 49 | } 50 | -------------------------------------------------------------------------------- /src/test/scala/com/boldradius/sample/cluster/FrontendSpec.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import org.junit.runner.RunWith 4 | import org.scalatest.junit.JUnitRunner 5 | import org.scalatest.BeforeAndAfterAll 6 | import org.scalatest.FlatSpec 7 | import org.scalatest.Matchers 8 | import akka.testkit.TestActorRef 9 | import akka.testkit.TestKit 10 | import akka.actor.ActorSystem 11 | import org.scalatest.FlatSpecLike 12 | import akka.pattern.ask 13 | import scala.concurrent.duration._ 14 | import akka.util.Timeout 15 | import scala.util.Success 16 | import scala.util.Failure 17 | import akka.actor.Props 18 | import akka.actor.ActorContext 19 | import akka.testkit.TestProbe 20 | import akka.actor.ActorRef 21 | import akka.actor.Actor 22 | import SampleClusterDefs._ 23 | 24 | @RunWith(classOf[JUnitRunner]) 25 | class FrontendSpec 26 | extends TestKit(ActorSystem("TestSystem")) 27 | with FlatSpecLike 28 | with Matchers 29 | with BeforeAndAfterAll { 30 | 31 | override def afterAll() { 32 | system.shutdown() 33 | } 34 | 35 | class TestSampleClusterBackend(target: ActorRef) extends Actor { 36 | def receive = { 37 | case c: GetActorMetrics => target forward c 38 | } 39 | } 40 | 41 | trait TestBackend { 42 | val backendProbe = TestProbe() 43 | trait BackendRouterProviderTest extends BackendRouterProvider { 44 | def newBackendRouter(context: ActorContext) = context.actorOf(Props(new TestSampleClusterBackend(backendProbe.ref))) 45 | } 46 | } 47 | 48 | "GetActorMetrics message on frontend " should "triggers GetActorMetrics message on backend" in new TestBackend { 49 | 50 | val frontend = TestActorRef(Props(new SampleClusterFrontend with BackendRouterProviderTest)) 51 | 52 | frontend ! GetActorMetrics() 53 | 54 | backendProbe.expectMsg(GetActorMetrics()) 55 | 56 | } 57 | } -------------------------------------------------------------------------------- /src/main/scala/com/boldradius/util/Json4sSupport.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.util 2 | 3 | 4 | import akka.http.marshalling._ 5 | import akka.http.model._ 6 | import akka.http.unmarshalling._ 7 | import akka.stream.FlowMaterializer 8 | import org.json4s._ 9 | import org.json4s.native.Serialization 10 | import org.json4s.native.Serialization.{read, write} 11 | import scala.language.implicitConversions 12 | 13 | import scala.concurrent.{Future, ExecutionContext} 14 | import scala.concurrent.duration._ 15 | 16 | trait Json4sSupport { 17 | 18 | implicit val formats = DefaultFormats 19 | implicit val formatsNative = Serialization.formats(NoTypeHints) 20 | 21 | implicit def json4sFromRequestUnmarshaller[T:Manifest](implicit fm:FlowMaterializer, ex:ExecutionContext):FromRequestUnmarshaller[T] = 22 | new Unmarshaller[HttpRequest,T] { 23 | def apply(req: HttpRequest): Future[T] = { 24 | req.entity.withContentType(ContentTypes.`application/json`).toStrict(5.second) 25 | .map(_.data.toArray).map(x => read[T](new String(x))) 26 | } 27 | } 28 | 29 | implicit def json4sFromResponseUnmarshaller[T:Manifest](implicit fm:FlowMaterializer, ex:ExecutionContext):FromResponseUnmarshaller[T] = 30 | new Unmarshaller[HttpResponse,T] { 31 | def apply(res: HttpResponse): Future[T] = { 32 | res.entity.withContentType(ContentTypes.`application/json`) 33 | .toStrict(5.second).map(_.data.toArray) 34 | .map(x => read[T](new String(x))) 35 | } 36 | } 37 | 38 | implicit def json4sToEntityMarshaller[T <: AnyRef]:ToEntityMarshaller[T] = 39 | Marshaller.withFixedCharset[T, MessageEntity](MediaTypes.`application/json`,HttpCharset.custom("*"))( tp => 40 | HttpEntity(write[T](tp))) 41 | 42 | 43 | implicit def json4sToHttpEntityMarshaller[T <: AnyRef](t:T):ResponseEntity = HttpEntity(MediaTypes.`application/json`, write[T](t)) 44 | 45 | 46 | 47 | 48 | } 49 | -------------------------------------------------------------------------------- /src/main/scala/com/boldradius/sample/cluster/SampleClusterFrontend.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import scala.concurrent.duration._ 4 | import com.typesafe.config.ConfigFactory 5 | import akka.actor.Actor 6 | import akka.actor.ActorLogging 7 | import akka.actor.ActorSystem 8 | import akka.actor.Props 9 | import akka.routing.FromConfig 10 | import akka.actor.ReceiveTimeout 11 | import akka.http.Http 12 | import akka.http.server.Directives._ 13 | import akka.stream.FlowMaterializer 14 | import scala.concurrent.ExecutionContext.Implicits.global 15 | import akka.util.Timeout 16 | import akka.actor.ActorRef 17 | import akka.actor.ActorContext 18 | import akka.cluster.Cluster 19 | import scala.language.postfixOps 20 | import SampleClusterDefs._ 21 | 22 | trait BackendRouterProvider { 23 | def newBackendRouter(context: ActorContext): ActorRef 24 | } 25 | 26 | trait BackendRouterProviderImpl extends BackendRouterProvider { 27 | def newBackendRouter(context: ActorContext) = context.actorOf(FromConfig.props(), name = BackendRouterName) 28 | } 29 | 30 | class SampleClusterFrontend() extends Actor with ActorLogging { 31 | 32 | this: BackendRouterProvider => 33 | 34 | implicit val timeout = Timeout(5 seconds) 35 | 36 | val backendRouter = newBackendRouter(context) 37 | 38 | def receive = { 39 | case c: GetActorMetrics => 40 | backendRouter.forward(c) 41 | case ReceiveTimeout => 42 | log.info("Timeout") 43 | } 44 | } 45 | 46 | object SampleClusterFrontend extends SampleClusterHttpRoute { 47 | def main(args: Array[String]): Unit = { 48 | 49 | val host = if (args.isEmpty) "localhost" else args(0) 50 | val port = if (args.isEmpty || args.length == 1) 8080 else args(1).toInt 51 | 52 | val config = ConfigFactory.parseString(s"akka.cluster.roles = [$FrontendActorRoleName]") 53 | .withFallback(ConfigFactory.load("application")) 54 | 55 | implicit val system = ActorSystem(ActorSystemName, config) 56 | system.log.info("Sample Cluster System will start when there is a minimum number of backend members in the cluster.") 57 | 58 | Cluster(system) registerOnMemberUp { 59 | val frontEnd = system.actorOf(Props(new SampleClusterFrontend with BackendRouterProviderImpl), name = FrontendActorName) 60 | implicit val materializer = FlowMaterializer() 61 | Http().bind(host, port) startHandlingWith { 62 | logRequestResult("A") { 63 | route(frontEnd) 64 | } 65 | } 66 | 67 | } 68 | 69 | } 70 | } -------------------------------------------------------------------------------- /src/main/scala/com/boldradius/sample/cluster/SampleClusterBackend.scala: -------------------------------------------------------------------------------- 1 | package com.boldradius.sample.cluster 2 | 3 | import scala.concurrent.Future 4 | import com.typesafe.config.ConfigFactory 5 | import akka.actor.Actor 6 | import akka.actor.ActorLogging 7 | import akka.actor.ActorSystem 8 | import akka.actor.Props 9 | import scala.util.Success 10 | import scala.util.Failure 11 | import akka.pattern.pipe 12 | import akka.cluster.Cluster 13 | import akka.cluster.ClusterEvent.ClusterMetricsChanged 14 | import akka.cluster.ClusterEvent.CurrentClusterState 15 | import akka.cluster.NodeMetrics 16 | import SampleClusterDefs._ 17 | 18 | class SampleClusterBackend extends Actor with ActorLogging { 19 | 20 | val selfAddress = Cluster(context.system).selfAddress 21 | 22 | override def preStart(): Unit = 23 | Cluster(context.system).subscribe(self, classOf[ClusterMetricsChanged]) 24 | override def postStop(): Unit = 25 | Cluster(context.system).unsubscribe(self) 26 | 27 | 28 | def receiveWithMetricsAvailable(nodeMetrics: NodeMetrics): Receive = { 29 | case c: GetActorMetrics => 30 | sender() ! Metrics(address = nodeMetrics.address.toString, timestamp = nodeMetrics.timestamp, cpu = nodeMetrics.metric("cpu-combined").map(_.value.doubleValue()).getOrElse(-1.0)) 31 | case ClusterMetricsChanged(clusterMetrics) => 32 | clusterMetrics.filter(_.address == selfAddress) foreach { newNodeMetrics => 33 | context.become(receiveWithMetricsAvailable(newNodeMetrics)) 34 | } 35 | case state: CurrentClusterState => // ignore 36 | } 37 | 38 | def receive = { 39 | case c: GetActorMetrics => // didn't get first metrics 40 | sender() ! NoMetricsPresent 41 | case ClusterMetricsChanged(clusterMetrics) => 42 | clusterMetrics.filter(_.address == selfAddress) foreach { newNodeMetrics => 43 | context.become(receiveWithMetricsAvailable(newNodeMetrics)) 44 | } 45 | case state: CurrentClusterState => // ignore 46 | } 47 | } 48 | 49 | object SampleClusterBackend { 50 | def main(args: Array[String]): Unit = { 51 | val port = if (args.isEmpty) "0" else args(0) 52 | val config = ConfigFactory.parseString(s"akka.remote.netty.tcp.port=$port"). 53 | withFallback(ConfigFactory.parseString(s"akka.cluster.roles = [$BackendActorRoleName]")) 54 | .withFallback(ConfigFactory.load("application")) 55 | 56 | val system = ActorSystem(ActorSystemName, config) 57 | system.actorOf(Props(classOf[SampleClusterBackend]), name = BackendActorName) 58 | } 59 | } -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. Definitions. 8 | 9 | "License" shall mean the terms and conditions for use, reproduction, 10 | and distribution as defined by Sections 1 through 9 of this document. 11 | 12 | "Licensor" shall mean the copyright owner or entity authorized by 13 | the copyright owner that is granting the License. 14 | 15 | "Legal Entity" shall mean the union of the acting entity and all 16 | other entities that control, are controlled by, or are under common 17 | control with that entity. For the purposes of this definition, 18 | "control" means (i) the power, direct or indirect, to cause the 19 | direction or management of such entity, whether by contract or 20 | otherwise, or (ii) ownership of fifty percent (50%) or more of the 21 | outstanding shares, or (iii) beneficial ownership of such entity. 22 | 23 | "You" (or "Your") shall mean an individual or Legal Entity 24 | exercising permissions granted by this License. 25 | 26 | "Source" form shall mean the preferred form for making modifications, 27 | including but not limited to software source code, documentation 28 | source, and configuration files. 29 | 30 | "Object" form shall mean any form resulting from mechanical 31 | transformation or translation of a Source form, including but 32 | not limited to compiled object code, generated documentation, 33 | and conversions to other media types. 34 | 35 | "Work" shall mean the work of authorship, whether in Source or 36 | Object form, made available under the License, as indicated by a 37 | copyright notice that is included in or attached to the work 38 | (an example is provided in the Appendix below). 39 | 40 | "Derivative Works" shall mean any work, whether in Source or Object 41 | form, that is based on (or derived from) the Work and for which the 42 | editorial revisions, annotations, elaborations, or other modifications 43 | represent, as a whole, an original work of authorship. For the purposes 44 | of this License, Derivative Works shall not include works that remain 45 | separable from, or merely link (or bind by name) to the interfaces of, 46 | the Work and Derivative Works thereof. 47 | 48 | "Contribution" shall mean any work of authorship, including 49 | the original version of the Work and any modifications or additions 50 | to that Work or Derivative Works thereof, that is intentionally 51 | submitted to Licensor for inclusion in the Work by the copyright owner 52 | or by an individual or Legal Entity authorized to submit on behalf of 53 | the copyright owner. For the purposes of this definition, "submitted" 54 | means any form of electronic, verbal, or written communication sent 55 | to the Licensor or its representatives, including but not limited to 56 | communication on electronic mailing lists, source code control systems, 57 | and issue tracking systems that are managed by, or on behalf of, the 58 | Licensor for the purpose of discussing and improving the Work, but 59 | excluding communication that is conspicuously marked or otherwise 60 | designated in writing by the copyright owner as "Not a Contribution." 61 | 62 | "Contributor" shall mean Licensor and any individual or Legal Entity 63 | on behalf of whom a Contribution has been received by Licensor and 64 | subsequently incorporated within the Work. 65 | 66 | 2. Grant of Copyright License. Subject to the terms and conditions of 67 | this License, each Contributor hereby grants to You a perpetual, 68 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable 69 | copyright license to reproduce, prepare Derivative Works of, 70 | publicly display, publicly perform, sublicense, and distribute the 71 | Work and such Derivative Works in Source or Object form. 72 | 73 | 3. Grant of Patent License. Subject to the terms and conditions of 74 | this License, each Contributor hereby grants to You a perpetual, 75 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable 76 | (except as stated in this section) patent license to make, have made, 77 | use, offer to sell, sell, import, and otherwise transfer the Work, 78 | where such license applies only to those patent claims licensable 79 | by such Contributor that are necessarily infringed by their 80 | Contribution(s) alone or by combination of their Contribution(s) 81 | with the Work to which such Contribution(s) was submitted. If You 82 | institute patent litigation against any entity (including a 83 | cross-claim or counterclaim in a lawsuit) alleging that the Work 84 | or a Contribution incorporated within the Work constitutes direct 85 | or contributory patent infringement, then any patent licenses 86 | granted to You under this License for that Work shall terminate 87 | as of the date such litigation is filed. 88 | 89 | 4. Redistribution. You may reproduce and distribute copies of the 90 | Work or Derivative Works thereof in any medium, with or without 91 | modifications, and in Source or Object form, provided that You 92 | meet the following conditions: 93 | 94 | (a) You must give any other recipients of the Work or 95 | Derivative Works a copy of this License; and 96 | 97 | (b) You must cause any modified files to carry prominent notices 98 | stating that You changed the files; and 99 | 100 | (c) You must retain, in the Source form of any Derivative Works 101 | that You distribute, all copyright, patent, trademark, and 102 | attribution notices from the Source form of the Work, 103 | excluding those notices that do not pertain to any part of 104 | the Derivative Works; and 105 | 106 | (d) If the Work includes a "NOTICE" text file as part of its 107 | distribution, then any Derivative Works that You distribute must 108 | include a readable copy of the attribution notices contained 109 | within such NOTICE file, excluding those notices that do not 110 | pertain to any part of the Derivative Works, in at least one 111 | of the following places: within a NOTICE text file distributed 112 | as part of the Derivative Works; within the Source form or 113 | documentation, if provided along with the Derivative Works; or, 114 | within a display generated by the Derivative Works, if and 115 | wherever such third-party notices normally appear. The contents 116 | of the NOTICE file are for informational purposes only and 117 | do not modify the License. You may add Your own attribution 118 | notices within Derivative Works that You distribute, alongside 119 | or as an addendum to the NOTICE text from the Work, provided 120 | that such additional attribution notices cannot be construed 121 | as modifying the License. 122 | 123 | You may add Your own copyright statement to Your modifications and 124 | may provide additional or different license terms and conditions 125 | for use, reproduction, or distribution of Your modifications, or 126 | for any such Derivative Works as a whole, provided Your use, 127 | reproduction, and distribution of the Work otherwise complies with 128 | the conditions stated in this License. 129 | 130 | 5. Submission of Contributions. Unless You explicitly state otherwise, 131 | any Contribution intentionally submitted for inclusion in the Work 132 | by You to the Licensor shall be under the terms and conditions of 133 | this License, without any additional terms or conditions. 134 | Notwithstanding the above, nothing herein shall supersede or modify 135 | the terms of any separate license agreement you may have executed 136 | with Licensor regarding such Contributions. 137 | 138 | 6. Trademarks. This License does not grant permission to use the trade 139 | names, trademarks, service marks, or product names of the Licensor, 140 | except as required for reasonable and customary use in describing the 141 | origin of the Work and reproducing the content of the NOTICE file. 142 | 143 | 7. Disclaimer of Warranty. Unless required by applicable law or 144 | agreed to in writing, Licensor provides the Work (and each 145 | Contributor provides its Contributions) on an "AS IS" BASIS, 146 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 147 | implied, including, without limitation, any warranties or conditions 148 | of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A 149 | PARTICULAR PURPOSE. You are solely responsible for determining the 150 | appropriateness of using or redistributing the Work and assume any 151 | risks associated with Your exercise of permissions under this License. 152 | 153 | 8. Limitation of Liability. In no event and under no legal theory, 154 | whether in tort (including negligence), contract, or otherwise, 155 | unless required by applicable law (such as deliberate and grossly 156 | negligent acts) or agreed to in writing, shall any Contributor be 157 | liable to You for damages, including any direct, indirect, special, 158 | incidental, or consequential damages of any character arising as a 159 | result of this License or out of the use or inability to use the 160 | Work (including but not limited to damages for loss of goodwill, 161 | work stoppage, computer failure or malfunction, or any and all 162 | other commercial damages or losses), even if such Contributor 163 | has been advised of the possibility of such damages. 164 | 165 | 9. Accepting Warranty or Additional Liability. While redistributing 166 | the Work or Derivative Works thereof, You may choose to offer, 167 | and charge a fee for, acceptance of support, warranty, indemnity, 168 | or other liability obligations and/or rights consistent with this 169 | License. However, in accepting such obligations, You may act only 170 | on Your own behalf and on Your sole responsibility, not on behalf 171 | of any other Contributor, and only if You agree to indemnify, 172 | defend, and hold each Contributor harmless for any liability 173 | incurred by, or claims asserted against, such Contributor by reason 174 | of your accepting any such warranty or additional liability. 175 | 176 | END OF TERMS AND CONDITIONS 177 | 178 | APPENDIX: How to apply the Apache License to your work. 179 | 180 | To apply the Apache License to your work, attach the following 181 | boilerplate notice, with the fields enclosed by brackets "{}" 182 | replaced with your own identifying information. (Don't include 183 | the brackets!) The text should be enclosed in the appropriate 184 | comment syntax for the file format. We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. --------------------------------------------------------------------------------