设计师网站有哪些,网站 引导页 设计,ppt下载免费完整版,seo提高网站排名上篇我们讨论了Akka-Remoting。我们说Akka-Remoting是一种点对点的通讯方式#xff0c;能使两个不同JVM上Akka-ActorSystem上的两个Actor之间可以相互沟通。Akka-Remoting还没有实现完全的Actor位置透明#xff08;location transparency#xff09;#xff0c;因为一个Act… 上篇我们讨论了Akka-Remoting。我们说Akka-Remoting是一种点对点的通讯方式能使两个不同JVM上Akka-ActorSystem上的两个Actor之间可以相互沟通。Akka-Remoting还没有实现完全的Actor位置透明location transparency因为一个Actor还必须在获得对方Actor确切地址信息后才能启动与之沟通过程。Akka-Remoting支持“远程查找”和“远程构建”两种沟通方式。由于篇幅所限我们只介绍了“远程查找”。在这一篇里我们将会讨论“远程构建”方式。 同样我们先通过项目结构来分析 lazy val local (project in file(.)).settings(commonSettings).settings(name : remoteCreateDemo).aggregate(calculator,remote).dependsOn(calculator)lazy val calculator (project in file(calculator)).settings(commonSettings).settings(name : calculator)lazy val remote (project in file(remote)).settings(commonSettings).settings(name : remoteSystem).aggregate(calculator).dependsOn(calculator) 远程构建的过程大致是这样的由local通知remote启动构建Actorremote从本地库中查找Actor的类定义class并把它载入内存。由于驱动、使用远程Actor是在local进行的所以local,remote项目还必须共享Calculator包括Calculator的功能消息。这项要求我们在.sbt中用aggregate(calculator)来协同编译。 我们把Calculator的监管supervisor也包括在这个源码文件里。现在这个calculator是个包括监管、功能、消息的完整项目了。Calculator源代码如下 package remoteCreation.calculatorimport akka.actor._
import scala.concurrent.duration._object Calcultor {sealed trait MathOpscase class Num(dnum: Double) extends MathOpscase class Add(dnum: Double) extends MathOpscase class Sub(dnum: Double) extends MathOpscase class Mul(dnum: Double) extends MathOpscase class Div(dnum: Double) extends MathOpssealed trait CalcOpscase object Clear extends CalcOpscase object GetResult extends CalcOpsdef props Props(new Calcultor)def supervisorProps Props(new SupervisorActor)
}class Calcultor extends Actor with ActorLogging {import Calcultor._var result: Double 0.0 //internal stateoverride def receive: Receive {case Num(d) result dcase Add(d) result dcase Sub(d) result - dcase Mul(d) result * dcase Div(d) val _ result.toInt / d.toInt //yield ArithmeticExceptionresult / dcase Clear result 0.0case GetResult sender() ! sResult of calculation is: $result}override def preRestart(reason: Throwable, message: Option[Any]): Unit {log.info(sRestarting calculator: ${reason.getMessage})super.preRestart(reason, message)}
}class SupervisorActor extends Actor {def decider: PartialFunction[Throwable,SupervisorStrategy.Directive] {case _: ArithmeticException SupervisorStrategy.Resume}override def supervisorStrategy: SupervisorStrategy OneForOneStrategy(maxNrOfRetries 5, withinTimeRange 5 seconds){decider.orElse(SupervisorStrategy.defaultDecider)}val calcActor context.actorOf(Calcultor.props,calculator)override def receive: Receive {case msg _ calcActor.forward(msg)}} 与上一个例子的”远程查找式“相同remote需要为Remoting公开一个端口。我们可以照搬.conf配置文件内容remote/src/main/resources/application.conf akka {actor {provider remote}remote {enabled-transports [akka.remote.netty.tcp]netty.tcp {hostname 127.0.0.1port 2552}log-sent-messages onlog-received-messages on}
} 由于远程构建和使用是在local上进行的在remote上我们只需要启动ActorSystem就行了 import com.typesafe.config.ConfigFactory
import akka.actor._object CalculatorRunner extends App {val remoteSystem ActorSystem(remoteSystem,ConfigFactory.load(application))println(Remote system started.)scala.io.StdIn.readLine()remoteSystem.terminate()} Calculator的构建是在localSystem上启动的我们需要在配置文件中描述远程构建标的还是未能实现位置透明local/src/main/resources/application.conf akka {actor {provider remote,deployment {/calculator {remote akka.tcp://remoteSystem127.0.0.1:2552}}}remote {netty.tcp {hostname 127.0.0.1,port2554}}
} 注意上面这个/calculator设置实际上指的是SupervisorActor。 现在我们可以在local上开始构建calculator然后使用它来运算了 import akka.actor._
import remoteCreation.calculator.Calcultor._
import scala.concurrent.duration._
import akka.pattern._object RemotingCreate extends App {val localSystem ActorSystem(localSystem)val calcActor localSystem.actorOf(props,name calculator) //created SupervisorActorimport localSystem.dispatchercalcActor ! ClearcalcActor ! Num(13.0)calcActor ! Mul(1.5)implicit val timeout akka.util.Timeout(1 second)((calcActor ? GetResult).mapTo[String]) foreach printlnscala.io.StdIn.readLine()calcActor ! Div(0.0)calcActor ! Div(1.5)calcActor ! Add(100.0)((calcActor ? GetResult).mapTo[String]) foreach printlnscala.io.StdIn.readLine()localSystem.terminate()} 从代码上看构建calculatorSupervisorActor过程与普通的Actor构建没分别所有细节都放在配置文件里了。但是要注意actorOf的name必须与配置文档中的设置匹配。 试运行结果与上一个例子相同。值得注意的是实际远程构建的是一个SupervisorActor。Calculator的构建是SupervisorActor构建的其中一部分。从运算结果看这个SupervisorActor也实现了它的功能。 下面是这次示范的源代码 local/build.sbt azy val commonSettings seq (name : RemoteCreateDemo,version : 1.0,scalaVersion : 2.11.8,libraryDependencies : Seq(com.typesafe.akka %% akka-actor % 2.5.2,com.typesafe.akka %% akka-remote % 2.5.2)
)lazy val local (project in file(.)).settings(commonSettings).settings(name : remoteCreateDemo).aggregate(calculator).dependsOn(calculator)lazy val calculator (project in file(calculator)).settings(commonSettings).settings(name : calculator)lazy val remote (project in file(remote)).settings(commonSettings).settings(name : remoteSystem).aggregate(calculator).dependsOn(calculator) calculator/calculator.scala package remoteCreation.calculatorimport akka.actor._
import scala.concurrent.duration._object Calcultor {sealed trait MathOpscase class Num(dnum: Double) extends MathOpscase class Add(dnum: Double) extends MathOpscase class Sub(dnum: Double) extends MathOpscase class Mul(dnum: Double) extends MathOpscase class Div(dnum: Double) extends MathOpssealed trait CalcOpscase object Clear extends CalcOpscase object GetResult extends CalcOpsdef props Props(new Calcultor)def supervisorProps Props(new SupervisorActor)
}class Calcultor extends Actor with ActorLogging {import Calcultor._var result: Double 0.0 //internal stateoverride def receive: Receive {case Num(d) result dcase Add(d) result dcase Sub(d) result - dcase Mul(d) result * dcase Div(d) val _ result.toInt / d.toInt //yield ArithmeticExceptionresult / dcase Clear result 0.0case GetResult sender() ! sResult of calculation is: $result}override def preRestart(reason: Throwable, message: Option[Any]): Unit {log.info(sRestarting calculator: ${reason.getMessage})super.preRestart(reason, message)}
}class SupervisorActor extends Actor {def decider: PartialFunction[Throwable,SupervisorStrategy.Directive] {case _: ArithmeticException SupervisorStrategy.Resume}override def supervisorStrategy: SupervisorStrategy OneForOneStrategy(maxNrOfRetries 5, withinTimeRange 5 seconds){decider.orElse(SupervisorStrategy.defaultDecider)}val calcActor context.actorOf(Calcultor.props,calculator)override def receive: Receive {case msg _ calcActor.forward(msg)}} remote/src/main/resources/application.conf akka {actor {provider remote}remote {enabled-transports [akka.remote.netty.tcp]netty.tcp {hostname 127.0.0.1port 2552}log-sent-messages onlog-received-messages on}
} remote/CalculatorRunner.scala package remoteCreation.remote
import com.typesafe.config.ConfigFactory
import akka.actor._object CalculatorRunner extends App {val remoteSystem ActorSystem(remoteSystem,ConfigFactory.load(application))println(Remote system started.)scala.io.StdIn.readLine()remoteSystem.terminate()} local/src/main/resources/application.conf akka {actor {provider remote,deployment {/calculator {remote akka.tcp://remoteSystem127.0.0.1:2552}}}remote {netty.tcp {hostname 127.0.0.1,port2554}}
} local/RemotingCreation.scala import akka.actor._
import remoteCreation.calculator.Calcultor._
import scala.concurrent.duration._
import akka.pattern._object RemotingCreate extends App {val localSystem ActorSystem(localSystem)val calcActor localSystem.actorOf(props,name calculator) //created SupervisorActor
import localSystem.dispatchercalcActor ! ClearcalcActor ! Num(13.0)calcActor ! Mul(1.5)implicit val timeout akka.util.Timeout(1 second)((calcActor ? GetResult).mapTo[String]) foreach printlnscala.io.StdIn.readLine()calcActor ! Div(0.0)calcActor ! Div(1.5)calcActor ! Add(100.0)((calcActor ? GetResult).mapTo[String]) foreach printlnscala.io.StdIn.readLine()localSystem.terminate()} 转载于:https://www.cnblogs.com/tiger-xc/p/7063301.html
