Scala Akka网络编程：Client Server网络通信（你问我答）案例

r囧r小猫 2023-10-04 14:48 43阅读 0赞

## 最终效果 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70]

## Server端 ##

package cn.zxl.akka.server
    
    import akka.actor._
    import cn.zxl.akka.common.{
        ClientMessage, ServerMessage}
    import com.typesafe.config.ConfigFactory
    
    /**
     * @description:
     * @author: zhangxueliang
     * @create: 2021-05-29 16:07
     * @version: 1.0
     * */
    class YellowChickenServer extends Actor{
        
      override def receive: Receive = {
        
        case "start" => println("start 小黄鸡客服开始工作了....")
        //如果接收到 ClientMessage
        case ClientMessage(mes) => {
        
          //使用 match --case 匹配(模糊)
          mes match {
        
            case "大数据学费" => sender() ! ServerMessage("35000RMB")
            case "学校地址" => sender() ! ServerMessage("北京昌平 xx 路 xx 大楼")
            case "学习什么技术" => sender() ! ServerMessage("大数据 前端 python")
            case _ => sender() ! ServerMessage("你说的啥子~")
          }
        }
      }
    }
    
    object YellowChickenServer extends App {
        
      val host = "127.0.0.1" //服务端 ip 地址
      val port = 9999
      //创建 config 对象,指定协议类型，监听的 ip 和端口
      val config = ConfigFactory.parseString(
        s"""
           |akka.actor.provider="akka.remote.RemoteActorRefProvider"
           |akka.remote.netty.tcp.hostname=$host
           |akka.remote.netty.tcp.port=$port
    """.stripMargin)
      //创建 ActorSystem
      //url (统一资源定位)
      val serverActorSystem =ActorSystem("Server",config)
      //创建 YellowChickenServer 的 actor 和返回 actorRef
      val yellowChickenServerRef: ActorRef =
        serverActorSystem.actorOf(Props[YellowChickenServer],"YellowChickenServer")
      //启动
      yellowChickenServerRef ! "start"
    }

## Client端 ##

package cn.zxl.akka.client
    
    import akka.actor.{
        Actor, ActorRef, ActorSelection, ActorSystem, Props}
    import cn.zxl.akka.common.{
        ClientMessage, ServerMessage}
    import com.typesafe.config.ConfigFactory
    
    import scala.io.StdIn
    
    /**
     * @description:
     * @author: zhangxueliang
     * @create: 2021-05-29 16:10
     * @version: 1.0
     * */
    class CustomerActor(serverHost: String, serverPort: Int) extends Actor {
        
      //定义一个 YellowChickenServerRef
      var serverActorRef: ActorSelection = _
    
      //在 Actor 中有一个方法 PreStart 方法，他会在 actor 运行前执行
      //在 akka 的开发中，通常将初始化的工作，放在 preStart 方法
      override def preStart(): Unit = {
        
        println("preStart() 执行")
        serverActorRef =
          context.actorSelection(s"akka.tcp://Server@${serverHost}:${serverPort}/user/YellowChickenServer")
        println("serverActorRef=" + serverActorRef)
      }
    
      override def receive: Receive = {
        
        case "start" => println("start,客户端运行，可以咨询问题")
        case mes: String => {
        
          //发给小黄鸡客服
          serverActorRef ! ClientMessage(mes) //使用 ClientMessage case class apply
        }
        //如果接收到服务器的回复
        case ServerMessage(mes) => {
        
          println(s"收到小黄鸡客服(Server): $mes")
        }
      }
    }
    
    //主程序-入口
    object CustomerActor extends App {
        
      val (clientHost, clientPort, serverHost, serverPort) = ("127.0.0.1", 9990, "127.0.0.1", 9999)
      val config = ConfigFactory.parseString(
        s"""
           |akka.actor.provider="akka.remote.RemoteActorRefProvider"
           |akka.remote.netty.tcp.hostname=$clientHost
           |akka.remote.netty.tcp.port=$clientPort
    """.stripMargin)
      //创建 ActorSystem
      val clientActorSystem = ActorSystem("client", config)
      //创建 CustomerActor 的实例和引用
      val customerActorRef: ActorRef = clientActorSystem.actorOf(Props(new CustomerActor(serverHost,
        serverPort)), "CustomerActor")
      //启动 customerRef/也可以理解启动 Actor
      customerActorRef ! "start"
      //客户端可以发送消息给服务器
      while (true) {
        
        println("请输入要咨询的问题")
        val mes = StdIn.readLine()
        customerActorRef ! mes
      }
    }

## 样例类：ClientMessage和ServerMessage ##

package cn.zxl.akka.common
    
    /**
     * @description:
     * @author: zhangxueliang
     * @create: 2021-05-29 16:14
     * @version: 1.0
     * */
    //使用样例类来构建协议
    //客户端发给服务器协议(序列化的对象)
    case class ClientMessage(mes: String)
    //服务端发给客户端的协议(样例类对象)
    case class ServerMessage(mes: String)

## pom ##

<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>com.zxl</groupId>
        <artifactId>scala-demo</artifactId>
        <version>1.0-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>scala-demo</name>
        <url>http://maven.apache.org</url>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <encoding>UTF-8</encoding>
            <scala.version>2.11.12</scala.version>
            <scala.compat.version>2.11</scala.compat.version>
            <akka.version>2.5.12</akka.version>
            <scala.actors.version>2.10.0-M6</scala.actors.version>
        </properties>
    
        <dependencies>
            
            
    
            
            <dependency>
                <groupId>com.typesafe.akka</groupId>
                <artifactId>akka-actor_${scala.compat.version}</artifactId>
                <version>${akka.version}</version>
            </dependency>
            
            <dependency>
                <groupId>com.typesafe.akka</groupId>
                <artifactId>akka-remote_${scala.compat.version}</artifactId>
                <version>${akka.version}</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>-dependencyfile</arg>
                                    <arg>${project.build.directory}/.scala_depencencies</arg>
                                </args>
                            </configuration>
                        </execution>
                    </executions>
                </plugin>
    
                
                
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-shade-plugin</artifactId>
                    <version>3.2.1</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>xxx</mainClass>
                                    </transformer>
                                </transformers>
                            </configuration>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    </project>

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