Akka-使用Akka编写RPC通信

Akk基于actor通信模型，底层使用Netty来实现远程RPC通信，该例子使用一个Master和一个Work
Master:

package org.hjc.rpc

import akka.actor.{Actor, ActorSystem, Props}
import com.typesafe.config.ConfigFactory

class Master extends Actor{

  println("主构造器被调用了..")

  override def preStart(): Unit = {
    println("preStart 调用了...")
  }

  /**
    * 用于接收消息
    *
    * @return
    */
  override def receive : Receive = {
    case "connected" =>{
      println("一个客户端链接...")
      sender ! "replay"
    }
  }
}


object Master {
  def main(args: Array[String]): Unit = {
    val host = args(0)
    val port = args(1).toInt
    val configStr =
      s"""
         |akka.actor.provider = "akka.remote.RemoteActorRefProvider"
         |akka.remote.netty.tcp.hostname = "$host"
         |akka.remote.netty.tcp.port = "$port"
      """.stripMargin
    val config = ConfigFactory.parseString(configStr)
    val actorSystem = ActorSystem("MastarSystem",config)

    val master = actorSystem.actorOf(Props[Master],"Master")
    //优雅退出
    actorSystem.awaitTermination()
  }
}

Worker:

package org.hjc.rpc

import akka.actor.{Actor, ActorSelection, ActorSystem, Props}
import com.typesafe.config.ConfigFactory

class Worker(val masterHost:String,val masterPort:Int) extends Actor{

  var master :ActorSelection = _

  //与Master建立链接
  override def preStart(): Unit = {
    master = context.actorSelection(s"akka.tcp://MastarSystem@$masterHost:$masterPort/user/Master")
    master ! "connected"
  }

  override def receive = {
    case "replay" =>{
      println("workder 接收到了Master  的回复")
    }
  }
}

object Worker{
  def main(args: Array[String]): Unit = {
    val host = args(0)
    val port = args(1).toInt
    val masterHost = args(2)      //Master的地址
    val masterPort = args(3).toInt  //Master的端口
    val configStr =
      s"""
         |akka.actor.provider = "akka.remote.RemoteActorRefProvider"
         |akka.remote.netty.tcp.hostname = "$host"
         |akka.remote.netty.tcp.port = "$port"
      """.stripMargin
    val config = ConfigFactory.parseString(configStr)
    val actorSystem = ActorSystem("WorkerSystem",config)

    actorSystem.actorOf(Props(new Worker(masterHost,masterPort)),"Worker")

    actorSystem.awaitTermination()
  }
}

Maven的POM依赖：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.hjc.rpc</groupId>
    <artifactId>akka-rpc</artifactId>
    <version>1.0-SNAPSHOT</version>


    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <encoding>UTF-8</encoding>
        <scala.version>2.10.6</scala.version>
        <scala.compat.version>2.10</scala.compat.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-library</artifactId>
            <version>${scala.version}</version>
        </dependency>

        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-actor_2.10</artifactId>
            <version>2.3.14</version>
        </dependency>

        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-remote_2.10</artifactId>
            <version>2.3.14</version>
        </dependency>

    </dependencies>

    <build>
        <sourceDirectory>src/main/scala</sourceDirectory>
        <testSourceDirectory>src/test/scala</testSourceDirectory>
        <plugins>
            <plugin>
                <groupId>net.alchim31.maven</groupId>
                <artifactId>scala-maven-plugin</artifactId>
                <version>3.2.2</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                            <goal>testCompile</goal>
                        </goals>
                        <configuration>
                            <args>
                                <arg>-make:transitive</arg>
                                <arg>-dependencyfile</arg>
                                <arg>${project.build.directory}/.scala_dependencies</arg>
                            </args>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>2.4.3</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <filters>
                                <filter>
                                    <artifact>*:*</artifact>
                                    <excludes>
                                        <exclude>META-INF/*.SF</exclude>
                                        <exclude>META-INF/*.DSA</exclude>
                                        <exclude>META-INF/*.RSA</exclude>
                                    </excludes>
                                </filter>
                            </filters>
                            <transformers>
                                <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                    <resource>reference.conf</resource>
                                </transformer>
                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <mainClass>org.hjc.rpc.Worker</mainClass>
                                </transformer>
                            </transformers>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

用Maven打包在不同的机器上执行
Master

Worker

最后

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