akka-cluster-remote例子
单机上模拟两个 actor 通信的例子
maven 依赖
com.typesafe.akka
akka-actor_2.12
2.6.16
com.typesafe.akka
akka-cluster_2.12
2.6.16
com.typesafe.akka
akka-actor_2.12
2.6.16
com.typesafe.akka
akka-cluster_2.12
2.6.16
Client Actor代码
package akka.remote
import akka.actor.{Actor, ActorSystem, Props}
import com.typesafe.config.ConfigFactory
object ClientActor {
class LocalActor extends Actor{
override def receive: Receive = {
case msg:String => {
println("got message from remote reply: " + msg)
}
}
override def preStart(): Unit = {
val remoteActor = context.actorSelection("akka://[email protected]:2552/user/server")
println("That 's remote:" + remoteActor)
remoteActor ! "hi"
}
}
val clientConfig="""akka {
| actor {
| provider = "cluster"
| }
| remote {
| artery {
| enabled = on
| transport = tcp
| canonical.hostname = "127.0.0.1"
| canonical.port = 2551
| }
| }
|}""".stripMargin
def main(args: Array[String]): Unit = {
// 第一台机器上的配置
val config1 = ConfigFactory.parseString(clientConfig)
// 创建第一台机器上的Actor系统
val system1 = ActorSystem("ActorCommunicationSystem", config1)
// 在第一台机器上创建Greeter Actor
val localActor = system1.actorOf(Props[LocalActor], "local")
}
}
Server Actor代码
package akka.remote
import akka.actor.{Actor, ActorSystem, Props}
import com.typesafe.config.ConfigFactory
class RemoteActor extends Actor{
override def receive: Receive = {
case msg: String=>{
println("remote received " + msg + " from " + sender)
sender ! "hi"
}
case _=>{
println("Received unknown msg ")
}
}
}
object ServerActor extends App {
val serverConfig="""
akka {
actor {
provider = "cluster"
}
remote {
artery {
enabled = on
transport = tcp
canonical.hostname = "127.0.0.1"
canonical.port = 2552
}
}
}
""".stripMargin
// 第二台机器上的配置
val config2 = ConfigFactory.parseString(serverConfig)
// 创建第二台机器上的Actor系统
val system2 = ActorSystem("ActorCommunicationSystem", config2)
// 在第二台机器上创建GreetingPrinter Actor
val greetingPrinter2 = system2.actorOf(Props[RemoteActor], "server")
println("ServerActor is ready")
}
运行结果
1，先拉起 Sever Actor，相当于监听对应的端口号，输出如下：
[INFO] [07/17/2023 19:21:13.537] [main] [ArteryTransport(akka://ActorCommunicationSystem)] Remoting started with transport [Artery tcp]; listening on address [akka://[email protected]:2552] with UID [-6133327117776502163]
[INFO] [07/17/2023 19:21:13.593] [main] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2552] - Starting up, Akka version [2.6.16] ...
[INFO] [07/17/2023 19:21:13.741] [main] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2552] - Registered cluster JMX MBean [akka:type=Cluster]
[INFO] [07/17/2023 19:21:13.741] [main] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2552] - Started up successfully
[INFO] [07/17/2023 19:21:13.808] [ActorCommunicationSystem-akka.actor.internal-dispatcher-3] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2552] - No downing-provider-class configured, manual cluster downing required, see https://doc.akka.io/docs/akka/current/typed/cluster.html#downing
[INFO] [07/17/2023 19:21:13.809] [ActorCommunicationSystem-akka.actor.internal-dispatcher-3] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2552] - No seed-nodes configured, manual cluster join required, see https://doc.akka.io/docs/akka/current/typed/cluster.html#joining
ServerActor is ready2，再拉起 Client Actor，发送消息，并收到回复
[INFO] [07/17/2023 19:22:02.615] [main] [ArteryTransport(akka://ActorCommunicationSystem)] Remoting started with transport [Artery tcp]; listening on address [akka://[email protected]:2551] with UID [6920370786141263359]
[INFO] [07/17/2023 19:22:02.664] [main] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2551] - Starting up, Akka version [2.6.16] ...
[INFO] [07/17/2023 19:22:02.814] [main] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2551] - Registered cluster JMX MBean [akka:type=Cluster]
[INFO] [07/17/2023 19:22:02.814] [main] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2551] - Started up successfully
[INFO] [07/17/2023 19:22:02.875] [ActorCommunicationSystem-akka.actor.internal-dispatcher-3] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2551] - No downing-provider-class configured, manual cluster downing required, see https://doc.akka.io/docs/akka/current/typed/cluster.html#downing
[INFO] [07/17/2023 19:22:02.875] [ActorCommunicationSystem-akka.actor.internal-dispatcher-3] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2551] - No seed-nodes configured, manual cluster join required, see https://doc.akka.io/docs/akka/current/typed/cluster.html#joining
That 's remote:ActorSelection[Anchor(akka://[email protected]:2552/), Path(/user/server)]
got message from remote reply: hi
3，此时再看 Server Actor 的输出：
[INFO] [07/17/2023 19:21:13.537] [main] [ArteryTransport(akka://ActorCommunicationSystem)] Remoting started with transport [Artery tcp]; listening on address [akka://[email protected]:2552] with UID [-6133327117776502163]
[INFO] [07/17/2023 19:21:13.593] [main] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2552] - Starting up, Akka version [2.6.16] ...
[INFO] [07/17/2023 19:21:13.741] [main] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2552] - Registered cluster JMX MBean [akka:type=Cluster]
[INFO] [07/17/2023 19:21:13.741] [main] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2552] - Started up successfully
[INFO] [07/17/2023 19:21:13.808] [ActorCommunicationSystem-akka.actor.internal-dispatcher-3] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2552] - No downing-provider-class configured, manual cluster downing required, see https://doc.akka.io/docs/akka/current/typed/cluster.html#downing
[INFO] [07/17/2023 19:21:13.809] [ActorCommunicationSystem-akka.actor.internal-dispatcher-3] [Cluster(akka://ActorCommunicationSystem)] Cluster Node [akka://[email protected]:2552] - No seed-nodes configured, manual cluster join required, see https://doc.akka.io/docs/akka/current/typed/cluster.html#joining
ServerActor is ready
remote received hi from Actor[akka://[email protected]:2551/user/local#285260490]